Environmental Engineering (EE) - Powering of equipment in access network

The present document describes the principles for powering of Telecommunications Equipment (TE) in access
networks (both traditional copper based and Next Generation fibre and/or hybrid based) and contains requirements for
the powering systems, laying down:
• the characteristics of the input and output interfaces of the power units; the recommendations for TE power
protection, also regarding network integrity and public services availability requirements;
• the management data, necessary to guarantee the required availability of the network and provided public
services and to ensure the maintenance of the TE power units.
The present document takes into account the innovative characteristics of fibre-based access network equipment, for
which the intrinsic limitation of the local power plants should be considered regarding the equipment installed inside
telecom centre or local exchanges or installed in streets or inside buildings: it goes from "complete integration of the
power plant in the TE" to "remote power feeding from a distant power plant".
The present document provides detailed information in annex A on the improved reliability of public electric power grid
and on the improved reliability and availability of new fibre-based NGA network. It should be considered that, for street
cabinet TE, the local power scenario is common and, in that case, the main power supply availability characteristics are
mainly based on electrical energy provider's performance.
The present document applies to the powering of all equipment of the access network (copper, fibre or radio networks)
located inside or outside telecommunications centres or local exchanges, differentiating the applicable and sustainable
power protection requirements. The access network is defined as the part of the telecommunications network, which
comprises the network termination (passive or active) that is installed inside customer premises and the first exchange
that can be also the broadband local exchange.
As innovative fibre-based and hybrid-based NGA network TE are changing the traditional powering paradigm, the
present document proposes the viable measures to comply with the integrity, availability and uninterrupted
telephone/VoIP provision that European regulatory defines for public networks [i.18].
The present document describes different configurations of powering the TE and the impacts on networks and services
continuity and reliability:
• Local power supply for TE (e.g. street cabinet, active network termination, etc.).
• Remote Feeding to TE from central office through copper access pair.
• Cluster Power supply feeding power for a cluster of TE.
• Remote power feeding to TE from centre or cluster power through a power cable.
• Back feeding or Reverse Powering architecture that can supply power to Access Network Units such as ONU
or ONT or remote DSL unit from the customer premises through its final distribution access copper pair.

Okoljski inženiring (EE) - Napajanje opreme v dostopovnem omrežju

General Information

Status
Published
Public Enquiry End Date
27-Jan-2021
Publication Date
22-Feb-2021
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
22-Feb-2021
Due Date
29-Apr-2021
Completion Date
23-Feb-2021

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ETSI EN 302 099 V2.2.1 (2021-02)
EUROPEAN STANDARD
Environmental Engineering (EE);
Powering of equipment in access network
---------------------- Page: 1 ----------------------
2 ETSI EN 302 099 V2.2.1 (2021-02)
Reference
REN/EE-0257
Keywords
access, network, power supply, remote
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search

The present document may be made available in electronic versions and/or in print. The content of any electronic and/or

print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any

existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI

deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.

Users of the present document should be aware that the document may be subject to revision or change of status.

Information on the current status of this and other ETSI documents is available at

https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx

If you find errors in the present document, please send your comment to one of the following services:

https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification

No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying

and microfilm except as authorized by written permission of ETSI.

The content of the PDF version shall not be modified without the written authorization of ETSI.

The copyright and the foregoing restriction extend to reproduction in all media.
© ETSI 2021.
All rights reserved.

DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.

3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and

of the 3GPP Organizational Partners.

oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and

of the oneM2M Partners.
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
---------------------- Page: 2 ----------------------
3 ETSI EN 302 099 V2.2.1 (2021-02)
Contents

Intellectual Property Rights ................................................................................................................................ 5

Foreword ............................................................................................................................................................. 5

Modal verbs terminology .................................................................................................................................... 5

1 Scope ........................................................................................................................................................ 6

2 References ................................................................................................................................................ 6

2.1 Normative references ......................................................................................................................................... 6

2.2 Informative references ........................................................................................................................................ 8

3 Definition of terms, symbols and abbreviations ....................................................................................... 9

3.1 Terms .................................................................................................................................................................. 9

3.2 Symbols ............................................................................................................................................................ 10

3.3 Abbreviations ................................................................................................................................................... 11

4 Powering configurations......................................................................................................................... 12

4.0 General ............................................................................................................................................................. 12

4.1 Remote powering architectures ........................................................................................................................ 14

4.1.1 Centralized powering architecture configurations ...................................................................................... 14

4.1.2 Cluster powering architecture configurations ............................................................................................. 15

4.2 Local powering architecture configurations ..................................................................................................... 17

4.2.1 TE of access network, common to several customers ................................................................................. 17

4.2.2 TE of access network, at customer premises .............................................................................................. 18

4.2.3 TE in access network reverse powered from customer premises ................................................................ 19

4.2.3.1 Reference configuration introduction .................................................................................................... 19

4.2.3.2 Wiring and electrical limitation consideration ...................................................................................... 19

4.2.3.3 Reverse power, voltage and current limits ............................................................................................ 19

5 Effect of the technologies on the powering strategy .............................................................................. 19

5.0 General ............................................................................................................................................................. 19

5.1 Powering strategy of family 1: metallic links ................................................................................................... 21

5.2 Powering strategy of family 2: non-metallic links ........................................................................................... 21

6 Requirements for local powering ........................................................................................................... 21

6.1 TE including the power plant ........................................................................................................................... 21

6.2 TE powered by a DC voltage nominal -48 V or up to 400 VDC local power unit ........................................... 22

6.3 TE powered by a LPU with a DC voltage other than -48 V or up to 400 VDC ............................................... 22

6.4 TE powered by a nominal AC voltage of 230 V, 50 Hz local power unit ........................................................ 22

7 Requirements for remote powering ........................................................................................................ 22

7.0 Remote powering solutions .............................................................................................................................. 22

7.1 Input of the Remote Power Unit (RPU) ........................................................................................................... 22

7.2 Output characteristics of the Remote Powering system ................................................................................... 23

7.2.1 Remote powering output with a RFT-V circuit .......................................................................................... 23

7.2.2 Remote powering output with a RFT-C circuit........................................................................................... 23

7.2.3 Remote powering output at up to 400 VDC ............................................................................................... 23

7.2.3.0 General consideration on line electrical parameters and operation ....................................................... 23

7.2.3.1 Steady state output voltage and current ................................................................................................. 23

7.2.3.2 Transient state output voltage ............................................................................................................... 23

7.2.3.3 Architecture of RP distribution for reliable and safe operation management ....................................... 24

7.2.3.4 Requirements for stable and safe operation .......................................................................................... 25

7.3 Input characteristics of remote power receiver ................................................................................................. 25

7.3.1 RFT-V remote power receiver input in voltage mode ................................................................................ 25

7.3.2 RFT-C remote power receiver input in current mode ................................................................................. 25

7.3.3 Remote Power Receiver (RPR) input ......................................................................................................... 26

7.3.4 Remote Power Receiver (RPR) output ....................................................................................................... 26

8 Power source interruption management ................................................................................................. 26

9 Power management ................................................................................................................................ 27

ETSI
---------------------- Page: 3 ----------------------
4 ETSI EN 302 099 V2.2.1 (2021-02)

10 Safety, EMC, protection ......................................................................................................................... 29

10.1 Product Safety .................................................................................................................................................. 29

10.2 EMC ................................................................................................................................................................. 30

10.3 Protection/resistibility ...................................................................................................................................... 30

10.4 Earthing and bonding of access network powering solutions ........................................................................... 30

10.5 Wiring requirements of remote power feeding to TE through power cable at up to 400 VDC voltage

mode ................................................................................................................................................................. 31

10.5.1 Protection against electric shock ................................................................................................................. 31

10.5.2 Protection against fire ................................................................................................................................. 31

10.5.3 Protection against physical damage ............................................................................................................ 32

11 Environmental conditions....................................................................................................................... 32

Annex A (informative): Statistical data on electrical power supply availability, from the Low

Voltage (LV) public grid (mains) in various European countries ............. 33

Annex B (informative): Battery sizing .................................................................................................. 37

B.0 General rules .......................................................................................................................................... 37

B.1 back-up power ........................................................................................................................................ 38

B.2 Autonomy of the back-up ....................................................................................................................... 38

B.3 Use of valve regulated lead acid battery................................................................................................. 39

B.4 Battery state of health test ...................................................................................................................... 39

Annex C (informative): Comparative reliability approach of remote powering versus local

powering ......................................................................................................... 40

Annex D (informative): Bibliography ................................................................................................... 43

History .............................................................................................................................................................. 44

ETSI
---------------------- Page: 4 ----------------------
5 ETSI EN 302 099 V2.2.1 (2021-02)
Intellectual Property Rights
Essential patents

IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information

pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found

in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in

respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web

server (https://ipr.etsi.org/).

Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee

can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web

server) which are, or may be, or may become, essential to the present document.
Trademarks

The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.

ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no

right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does

not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.

Foreword

This European Standard (EN) has been produced by ETSI Technical Committee Environmental Engineering (EE).

National transposition dates
Date of adoption of this EN: 28 January 2021
Date of latest announcement of this EN (doa): 30 April 2021
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 October 2021
Date of withdrawal of any conflicting National Standard (dow): 31 October 2021
Modal verbs terminology

In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and

"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of

provisions).

"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.

ETSI
---------------------- Page: 5 ----------------------
6 ETSI EN 302 099 V2.2.1 (2021-02)
1 Scope

The present document describes the principles for powering of Telecommunications Equipment (TE) in access

networks (both traditional copper based and Next Generation fibre and/or hybrid based) and contains requirements for

the powering systems, laying down:

• the characteristics of the input and output interfaces of the power units; the recommendations for TE power

protection, also regarding network integrity and public services availability requirements;

• the management data, necessary to guarantee the required availability of the network and provided public

services and to ensure the maintenance of the TE power units.

The present document takes into account the innovative characteristics of fibre-based access network equipment, for

which the intrinsic limitation of the local power plants should be considered regarding the equipment installed inside

telecom centre or local exchanges or installed in streets or inside buildings: it goes from "complete integration of the

power plant in the TE" to "remote power feeding from a distant power plant".

The present document provides detailed information in annex A on the improved reliability of public electric power grid

and on the improved reliability and availability of new fibre-based NGA network. It should be considered that, for street

cabinet TE, the local power scenario is common and, in that case, the main power supply availability characteristics are

mainly based on electrical energy provider's performance.

The present document applies to the powering of all equipment of the access network (copper, fibre or radio networks)

located inside or outside telecommunications centres or local exchanges, differentiating the applicable and sustainable

power protection requirements. The access network is defined as the part of the telecommunications network, which

comprises the network termination (passive or active) that is installed inside customer premises and the first exchange

that can be also the broadband local exchange.

As innovative fibre-based and hybrid-based NGA network TE are changing the traditional powering paradigm, the

present document proposes the viable measures to comply with the integrity, availability and uninterrupted

telephone/VoIP provision that European regulatory defines for public networks [i.18].

The present document describes different configurations of powering the TE and the impacts on networks and services

continuity and reliability:

• Local power supply for TE (e.g. street cabinet, active network termination, etc.).

• Remote Feeding to TE from central office through copper access pair.
• Cluster Power supply feeding power for a cluster of TE.
• Remote power feeding to TE from centre or cluster power through a power cable.

• Back feeding or Reverse Powering architecture that can supply power to Access Network Units such as ONU

or ONT or remote DSL unit from the customer premises through its final distribution access copper pair.

2 References
2.1 Normative references

References are either specific (identified by date of publication and/or edition number or version number) or

non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the

referenced document (including any amendments) applies.

Referenced documents which are not found to be publicly available in the expected location might be found at

https://docbox.etsi.org/Reference/.

NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee

their long term validity.
ETSI
---------------------- Page: 6 ----------------------
7 ETSI EN 302 099 V2.2.1 (2021-02)

The following referenced documents are necessary for the application of the present document.

[1] ETSI EN 300 132-1: "Environmental Engineering (EE); Power supply interface at the input to

Information and Communication Technology (ICT) equipment; Part 1: Alternating Current (AC)".

[2] ETSI EN 300 132-2: "Environmental Engineering (EE); Power supply interface at the input of

Information and Communication Technology (ICT) equipment; Part 2: -48 V Direct Current

(DC)".

[3] IEC 62368-3: "Audio/video, information and communication technology equipment - Part 3:

Safety aspects for DC power transfer through communication cables and ports".
[4] EN 60038: "CENELEC standard Voltages", (produced by CENELEC).

[5] EN 60664-1: "Insulation coordination for equipment within low-voltage systems - Part 1:

Principles, requirements and tests", (produced by CENELEC).

[6] EN 50310: "Application of equipotential bonding and earthing in buildings with information

technology equipment", (produced by CENELEC).

[7] ETSI EN 300 253: "Environmental Engineering (EE); Earthing and bonding of ICT equipment

powered by -48 VDC in telecom and data centres".

[8] Recommendation ITU-T K.35: "Bonding configurations and earthing at remote electronic sites".

[9] Recommendation ITU-T K.45: "Resistibility of telecommunication equipment installed in the

access and trunk networks to overvoltages and overcurrents".

[10] ETSI ES 203 215: "Environmental Engineering (EE); Measurement Methods and Limits for Power

Consumption in Broadband Telecommunication Networks Equipment".

[11] ETSI EN 300 132-3: "Environmental Engineering (EE); Power supply interface at the input to

telecommunications equipment; Part 3: Operated by rectified current source, alternating current

source or direct current source up to 400 V".

NOTE: A revision is on-going in ETSI and this document should become ETSI EN 300 132-3-1: "Direct current

source up to 400 V".

[12] ETSI ES 202 336-1: "Environmental Engineering (EE); Monitoring and Control Interface for

Infrastructure Equipment (Power, Cooling and Building Environment Systems used in

Telecommunication Networks); Part 1: Generic Interface".

[13] ETSI TS 101 548-1: "Access, Terminals, Transmission and Multiplexing (ATTM); European

Requirements for Reverse Powering of Remote Access Equipment; Part 1: Twisted pair

networks".

[14] ETSI EN 301 605: "Environmental Engineering (EE); Earthing and bonding of 400 VDC data and

telecom (ICT) equipment".

[15] Recommendation ITU-T L.1200 (May 2012): "Direct current power feeding interface up to 400 V

at the input to telecommunication and ICT equipment".

[16] HD 60364 series: "Low Voltage electrical installations material", produced by CENELEC.

[17] ETSI ES 202 336-8: "Environmental Engineering (EE); Monitoring and Control Interface for

Infrastructure Equipment (Power, Cooling and Building Environment Systems used in

Telecommunication Networks); Part 8: Remote Power Feeding System control and monitoring

information model".
ETSI
---------------------- Page: 7 ----------------------
8 ETSI EN 302 099 V2.2.1 (2021-02)
2.2 Informative references

References are either specific (identified by date of publication and/or edition number or version number) or

non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the

referenced document (including any amendments) applies.

NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee

their long term validity.

The following referenced documents are not necessary for the application of the present document but they assist the

user with regard to a particular subject area.

[i.1] ETSI EN 300 019-1-1: "Environmental Engineering (EE); Environmental conditions and

environmental tests for telecommunications equipment; Part 1-1: Classification of environmental

conditions; Storage".

[i.2] ETSI EN 300 019-1-3: "Environmental Engineering (EE); Environmental conditions and

environmental tests for telecommunications equipment; Part 1-3: Classification of environmental

conditions; Stationary use at weather protected locations".

[i.3] ETSI EN 300 019-1-4: "Environmental Engineering (EE); Environmental conditions and

environmental tests for telecommunications equipment; Part 1-4: Classification of environmental

conditions; Stationary use at non-weather protected locations".

[i.4] ETSI EN 300 019-1-8: "Environmental Engineering (EE); Environmental conditions and

environmental tests for telecommunications equipment; Part 1-8: Classification of environmental

conditions; Stationary use at underground locations".
[i.5] Void.
[i.6] Void.

[i.7] HD 60364-1: "Low-voltage electrical installations - Part 1: Fundamental principles, assessment of

general characteristics, definitions", (produced by CENELEC).

[i.8] ETSI EN 302 999: "Safety; Remote Power Feeding Installations; Safety requirements for the

erection and operation of information technology installations with remote power feeding".

[i.9] ENISA: "Power Supply Dependencies in the Electronic Communications Sector Survey, analysis

and recommendations for resilience against power supply failures", December 2013.

[i.10] CEER (Council of European Energy Regulators): "Benchmarking Report 5.2 on the Continuity of

Electricity Supply" - Ref: C14-EQS-62-03 (12 February 2015).

NOTE: Available at https://www.ceer.eu/documents/104400/-/-/cbc48e6a-5d5e-a170-ae1d-7b7b298d46a4.

[i.11] AEEGSI report 16 November 2015.
NOTE: Available at www.autorita.energia.it/allegati/com_stampa/15/151116cs.pdf.

[i.12] ETSI TS 103 553-1: "Environmental Engineering (EE); Innovative energy storage technology for

stationary use; Part 1: Overview".

[i.13] IEC EN 60950-21: "Information technology equipment. Safety. Remote power feeding".

[i.14] IEC EN 60950-22: "Information technology equipment. Safety. Equipment installed outdoors".

[i.15] IEC EN 62368-3: "Audio/video, information and communication technology equipment -

Part 3: Safety aspects for DC power transfer through communication cables and ports".

[i.16] Recommendation ITU-T L.1001: "External universal power adapter solutions for stationary

information and communication technology devices".

[i.17] IEC EN 62368-1: "Audio/video, information and communication technology equipment -

Part 1: Safety requirements".
ETSI
---------------------- Page: 8 ----------------------
9 ETSI EN 302 099 V2.2.1 (2021-02)

[i.18] Directive 2002/22/EC of the European Parliament and of the Council of 7 March 2002 as emended

by Directive 2009/136/EC of the European Parliament and of The Council of 25 November 2009,

in particular regarding the Article 23 provisions.

[i.19] ETSI EN 303 215 (V1.3.1) (2015-04): "Environmental Engineering (EE); Measurement methods

and limits for power consumption in broadband telecommunication networks equipment".

[i.20] EN 60896-2: "Stationary lead-acid batteries - General requirements and methods of test -

Part 2: Valve regulated types", (produced by CENELEC).

[i.21] TR 62102: "Electrical safety - Classification of interfaces for equipment to be connected to

information and communications technology networks", (produced by CENELEC).
[i.22] Void.

[i.23] Recommendation ITU-T L.1220 (2017-08): "Innovative energy storage technology for stationary

use - Part 1: Overview of energy storage".

[i.24] EN 60950-1: "Information technology equipment - Safety - Part 1: General requirements",

(produced by CENELEC).

[i.25] Recommendation ITU-T L.1202 (2015): "Methodologies for evaluating the performance of an up

to 400 VDC power feeding system and its environmental impact".

[i.26] ETSI ES 203 408 (V1.1.1) (2016-12): "Environmental Engineering (EE); Colour and marking of

DC cable and connecting devices".
[i.27] Broadband Forum TR-301.
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:

access network: part of a telecommunications network between the Network Termination/Access Gateway and the first

switching unit

backfeeding or reverse powering: powering architecture that can supply power to access network units from the

customer through its final distribution access copper pair
NOTE: Access network units may be ONU, ONT or remote DSL units.

centralized powering: remote powering in which the remote feeding source is located in a telecommunications centre

cluster powering: remote powering of a cluster of equipment (1 to n items of equipment), in which the remote feeding

source is located outside a telecommunications centre

electric energy provider: provider of electrical energy from the public grid (mains)

ES1, ES2, ES3: See IEC EN 62368-1 [i.17].

interface A: -48 V power interface at input of Telecom/ICT equipment with voltage range and other electrical

specifications defined in ETSI EN 300 132-2 [2]

interface A1: up to 400 VAC rms power interface at input of Telecom/ICT equipment with voltage range and other

electrical specifications defined in ETSI EN 300 132-1 [1]

interface A3: up to 400 VDC power interface at input of Telecom/ICT equipment with voltage range, and other

electrical specifications defined in ETSI EN 300 132-3 [11]
ETSI
---------------------- Page: 9 ----------------------
10 ETSI EN 302 099 V2.2.1 (2021-02)

Local Power Unit (LPU): power supply equipment whose function is to supply a telecommunication equipment

situated at the same location

NOTE: It is generally locally connected to the mains and provides DC or AC voltage output to feed

telecommunication equipment.

local powering: powering principle of a telecommunications equipment by a (dedicated) power unit implemented in the

same location
primary circuit: See IEC EN 62368-1 [i.17].

protective device selectivity: coordination of the operating characteristics of two or more protective devices to ensure

faulty equipment is safely disconnected with no or limited impact on other parts of the system

PS1, PS2, PS3: See IEC EN 62368-1 [i.17].

Remote Feeding Telecommunication (RFT) circuit: secondary circuit within the equipment, intended to supply or

receive DC power via a telecommunication network at voltages equa
...

SLOVENSKI STANDARD
SIST EN 302 099 V2.2.1:2021
01-april-2021
Okoljski inženiring (EE) - Napajanje opreme v dostopovnem omrežju
Environmental Engineering (EE) - Powering of equipment in access network
Ta slovenski standard je istoveten z: ETSI EN 302 099 V2.2.1 (2021-02)
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
33.050.01 Telekomunikacijska Telecommunication terminal
terminalska oprema na equipment in general
splošno
SIST EN 302 099 V2.2.1:2021 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 302 099 V2.2.1:2021
---------------------- Page: 2 ----------------------
SIST EN 302 099 V2.2.1:2021
ETSI EN 302 099 V2.2.1 (2021-02)
EUROPEAN STANDARD
Environmental Engineering (EE);
Powering of equipment in access network
---------------------- Page: 3 ----------------------
SIST EN 302 099 V2.2.1:2021
2 ETSI EN 302 099 V2.2.1 (2021-02)
Reference
REN/EE-0257
Keywords
access, network, power supply, remote
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search

The present document may be made available in electronic versions and/or in print. The content of any electronic and/or

print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any

existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI

deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.

Users of the present document should be aware that the document may be subject to revision or change of status.

Information on the current status of this and other ETSI documents is available at

https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx

If you find errors in the present document, please send your comment to one of the following services:

https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification

No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying

and microfilm except as authorized by written permission of ETSI.

The content of the PDF version shall not be modified without the written authorization of ETSI.

The copyright and the foregoing restriction extend to reproduction in all media.
© ETSI 2021.
All rights reserved.

DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.

3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and

of the 3GPP Organizational Partners.

oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and

of the oneM2M Partners.
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
---------------------- Page: 4 ----------------------
SIST EN 302 099 V2.2.1:2021
3 ETSI EN 302 099 V2.2.1 (2021-02)
Contents

Intellectual Property Rights ................................................................................................................................ 5

Foreword ............................................................................................................................................................. 5

Modal verbs terminology .................................................................................................................................... 5

1 Scope ........................................................................................................................................................ 6

2 References ................................................................................................................................................ 6

2.1 Normative references ......................................................................................................................................... 6

2.2 Informative references ........................................................................................................................................ 8

3 Definition of terms, symbols and abbreviations ....................................................................................... 9

3.1 Terms .................................................................................................................................................................. 9

3.2 Symbols ............................................................................................................................................................ 10

3.3 Abbreviations ................................................................................................................................................... 11

4 Powering configurations......................................................................................................................... 12

4.0 General ............................................................................................................................................................. 12

4.1 Remote powering architectures ........................................................................................................................ 14

4.1.1 Centralized powering architecture configurations ...................................................................................... 14

4.1.2 Cluster powering architecture configurations ............................................................................................. 15

4.2 Local powering architecture configurations ..................................................................................................... 17

4.2.1 TE of access network, common to several customers ................................................................................. 17

4.2.2 TE of access network, at customer premises .............................................................................................. 18

4.2.3 TE in access network reverse powered from customer premises ................................................................ 19

4.2.3.1 Reference configuration introduction .................................................................................................... 19

4.2.3.2 Wiring and electrical limitation consideration ...................................................................................... 19

4.2.3.3 Reverse power, voltage and current limits ............................................................................................ 19

5 Effect of the technologies on the powering strategy .............................................................................. 19

5.0 General ............................................................................................................................................................. 19

5.1 Powering strategy of family 1: metallic links ................................................................................................... 21

5.2 Powering strategy of family 2: non-metallic links ........................................................................................... 21

6 Requirements for local powering ........................................................................................................... 21

6.1 TE including the power plant ........................................................................................................................... 21

6.2 TE powered by a DC voltage nominal -48 V or up to 400 VDC local power unit ........................................... 22

6.3 TE powered by a LPU with a DC voltage other than -48 V or up to 400 VDC ............................................... 22

6.4 TE powered by a nominal AC voltage of 230 V, 50 Hz local power unit ........................................................ 22

7 Requirements for remote powering ........................................................................................................ 22

7.0 Remote powering solutions .............................................................................................................................. 22

7.1 Input of the Remote Power Unit (RPU) ........................................................................................................... 22

7.2 Output characteristics of the Remote Powering system ................................................................................... 23

7.2.1 Remote powering output with a RFT-V circuit .......................................................................................... 23

7.2.2 Remote powering output with a RFT-C circuit........................................................................................... 23

7.2.3 Remote powering output at up to 400 VDC ............................................................................................... 23

7.2.3.0 General consideration on line electrical parameters and operation ....................................................... 23

7.2.3.1 Steady state output voltage and current ................................................................................................. 23

7.2.3.2 Transient state output voltage ............................................................................................................... 23

7.2.3.3 Architecture of RP distribution for reliable and safe operation management ....................................... 24

7.2.3.4 Requirements for stable and safe operation .......................................................................................... 25

7.3 Input characteristics of remote power receiver ................................................................................................. 25

7.3.1 RFT-V remote power receiver input in voltage mode ................................................................................ 25

7.3.2 RFT-C remote power receiver input in current mode ................................................................................. 25

7.3.3 Remote Power Receiver (RPR) input ......................................................................................................... 26

7.3.4 Remote Power Receiver (RPR) output ....................................................................................................... 26

8 Power source interruption management ................................................................................................. 26

9 Power management ................................................................................................................................ 27

ETSI
---------------------- Page: 5 ----------------------
SIST EN 302 099 V2.2.1:2021
4 ETSI EN 302 099 V2.2.1 (2021-02)

10 Safety, EMC, protection ......................................................................................................................... 29

10.1 Product Safety .................................................................................................................................................. 29

10.2 EMC ................................................................................................................................................................. 30

10.3 Protection/resistibility ...................................................................................................................................... 30

10.4 Earthing and bonding of access network powering solutions ........................................................................... 30

10.5 Wiring requirements of remote power feeding to TE through power cable at up to 400 VDC voltage

mode ................................................................................................................................................................. 31

10.5.1 Protection against electric shock ................................................................................................................. 31

10.5.2 Protection against fire ................................................................................................................................. 31

10.5.3 Protection against physical damage ............................................................................................................ 32

11 Environmental conditions....................................................................................................................... 32

Annex A (informative): Statistical data on electrical power supply availability, from the Low

Voltage (LV) public grid (mains) in various European countries ............. 33

Annex B (informative): Battery sizing .................................................................................................. 37

B.0 General rules .......................................................................................................................................... 37

B.1 back-up power ........................................................................................................................................ 38

B.2 Autonomy of the back-up ....................................................................................................................... 38

B.3 Use of valve regulated lead acid battery................................................................................................. 39

B.4 Battery state of health test ...................................................................................................................... 39

Annex C (informative): Comparative reliability approach of remote powering versus local

powering ......................................................................................................... 40

Annex D (informative): Bibliography ................................................................................................... 43

History .............................................................................................................................................................. 44

ETSI
---------------------- Page: 6 ----------------------
SIST EN 302 099 V2.2.1:2021
5 ETSI EN 302 099 V2.2.1 (2021-02)
Intellectual Property Rights
Essential patents

IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information

pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found

in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in

respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web

server (https://ipr.etsi.org/).

Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee

can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web

server) which are, or may be, or may become, essential to the present document.
Trademarks

The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.

ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no

right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does

not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.

Foreword

This European Standard (EN) has been produced by ETSI Technical Committee Environmental Engineering (EE).

National transposition dates
Date of adoption of this EN: 28 January 2021
Date of latest announcement of this EN (doa): 30 April 2021
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 October 2021
Date of withdrawal of any conflicting National Standard (dow): 31 October 2021
Modal verbs terminology

In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and

"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of

provisions).

"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.

ETSI
---------------------- Page: 7 ----------------------
SIST EN 302 099 V2.2.1:2021
6 ETSI EN 302 099 V2.2.1 (2021-02)
1 Scope

The present document describes the principles for powering of Telecommunications Equipment (TE) in access

networks (both traditional copper based and Next Generation fibre and/or hybrid based) and contains requirements for

the powering systems, laying down:

• the characteristics of the input and output interfaces of the power units; the recommendations for TE power

protection, also regarding network integrity and public services availability requirements;

• the management data, necessary to guarantee the required availability of the network and provided public

services and to ensure the maintenance of the TE power units.

The present document takes into account the innovative characteristics of fibre-based access network equipment, for

which the intrinsic limitation of the local power plants should be considered regarding the equipment installed inside

telecom centre or local exchanges or installed in streets or inside buildings: it goes from "complete integration of the

power plant in the TE" to "remote power feeding from a distant power plant".

The present document provides detailed information in annex A on the improved reliability of public electric power grid

and on the improved reliability and availability of new fibre-based NGA network. It should be considered that, for street

cabinet TE, the local power scenario is common and, in that case, the main power supply availability characteristics are

mainly based on electrical energy provider's performance.

The present document applies to the powering of all equipment of the access network (copper, fibre or radio networks)

located inside or outside telecommunications centres or local exchanges, differentiating the applicable and sustainable

power protection requirements. The access network is defined as the part of the telecommunications network, which

comprises the network termination (passive or active) that is installed inside customer premises and the first exchange

that can be also the broadband local exchange.

As innovative fibre-based and hybrid-based NGA network TE are changing the traditional powering paradigm, the

present document proposes the viable measures to comply with the integrity, availability and uninterrupted

telephone/VoIP provision that European regulatory defines for public networks [i.18].

The present document describes different configurations of powering the TE and the impacts on networks and services

continuity and reliability:

• Local power supply for TE (e.g. street cabinet, active network termination, etc.).

• Remote Feeding to TE from central office through copper access pair.
• Cluster Power supply feeding power for a cluster of TE.
• Remote power feeding to TE from centre or cluster power through a power cable.

• Back feeding or Reverse Powering architecture that can supply power to Access Network Units such as ONU

or ONT or remote DSL unit from the customer premises through its final distribution access copper pair.

2 References
2.1 Normative references

References are either specific (identified by date of publication and/or edition number or version number) or

non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the

referenced document (including any amendments) applies.

Referenced documents which are not found to be publicly available in the expected location might be found at

https://docbox.etsi.org/Reference/.

NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee

their long term validity.
ETSI
---------------------- Page: 8 ----------------------
SIST EN 302 099 V2.2.1:2021
7 ETSI EN 302 099 V2.2.1 (2021-02)

The following referenced documents are necessary for the application of the present document.

[1] ETSI EN 300 132-1: "Environmental Engineering (EE); Power supply interface at the input to

Information and Communication Technology (ICT) equipment; Part 1: Alternating Current (AC)".

[2] ETSI EN 300 132-2: "Environmental Engineering (EE); Power supply interface at the input of

Information and Communication Technology (ICT) equipment; Part 2: -48 V Direct Current

(DC)".

[3] IEC 62368-3: "Audio/video, information and communication technology equipment - Part 3:

Safety aspects for DC power transfer through communication cables and ports".
[4] EN 60038: "CENELEC standard Voltages", (produced by CENELEC).

[5] EN 60664-1: "Insulation coordination for equipment within low-voltage systems - Part 1:

Principles, requirements and tests", (produced by CENELEC).

[6] EN 50310: "Application of equipotential bonding and earthing in buildings with information

technology equipment", (produced by CENELEC).

[7] ETSI EN 300 253: "Environmental Engineering (EE); Earthing and bonding of ICT equipment

powered by -48 VDC in telecom and data centres".

[8] Recommendation ITU-T K.35: "Bonding configurations and earthing at remote electronic sites".

[9] Recommendation ITU-T K.45: "Resistibility of telecommunication equipment installed in the

access and trunk networks to overvoltages and overcurrents".

[10] ETSI ES 203 215: "Environmental Engineering (EE); Measurement Methods and Limits for Power

Consumption in Broadband Telecommunication Networks Equipment".

[11] ETSI EN 300 132-3: "Environmental Engineering (EE); Power supply interface at the input to

telecommunications equipment; Part 3: Operated by rectified current source, alternating current

source or direct current source up to 400 V".

NOTE: A revision is on-going in ETSI and this document should become ETSI EN 300 132-3-1: "Direct current

source up to 400 V".

[12] ETSI ES 202 336-1: "Environmental Engineering (EE); Monitoring and Control Interface for

Infrastructure Equipment (Power, Cooling and Building Environment Systems used in

Telecommunication Networks); Part 1: Generic Interface".

[13] ETSI TS 101 548-1: "Access, Terminals, Transmission and Multiplexing (ATTM); European

Requirements for Reverse Powering of Remote Access Equipment; Part 1: Twisted pair

networks".

[14] ETSI EN 301 605: "Environmental Engineering (EE); Earthing and bonding of 400 VDC data and

telecom (ICT) equipment".

[15] Recommendation ITU-T L.1200 (May 2012): "Direct current power feeding interface up to 400 V

at the input to telecommunication and ICT equipment".

[16] HD 60364 series: "Low Voltage electrical installations material", produced by CENELEC.

[17] ETSI ES 202 336-8: "Environmental Engineering (EE); Monitoring and Control Interface for

Infrastructure Equipment (Power, Cooling and Building Environment Systems used in

Telecommunication Networks); Part 8: Remote Power Feeding System control and monitoring

information model".
ETSI
---------------------- Page: 9 ----------------------
SIST EN 302 099 V2.2.1:2021
8 ETSI EN 302 099 V2.2.1 (2021-02)
2.2 Informative references

References are either specific (identified by date of publication and/or edition number or version number) or

non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the

referenced document (including any amendments) applies.

NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee

their long term validity.

The following referenced documents are not necessary for the application of the present document but they assist the

user with regard to a particular subject area.

[i.1] ETSI EN 300 019-1-1: "Environmental Engineering (EE); Environmental conditions and

environmental tests for telecommunications equipment; Part 1-1: Classification of environmental

conditions; Storage".

[i.2] ETSI EN 300 019-1-3: "Environmental Engineering (EE); Environmental conditions and

environmental tests for telecommunications equipment; Part 1-3: Classification of environmental

conditions; Stationary use at weather protected locations".

[i.3] ETSI EN 300 019-1-4: "Environmental Engineering (EE); Environmental conditions and

environmental tests for telecommunications equipment; Part 1-4: Classification of environmental

conditions; Stationary use at non-weather protected locations".

[i.4] ETSI EN 300 019-1-8: "Environmental Engineering (EE); Environmental conditions and

environmental tests for telecommunications equipment; Part 1-8: Classification of environmental

conditions; Stationary use at underground locations".
[i.5] Void.
[i.6] Void.

[i.7] HD 60364-1: "Low-voltage electrical installations - Part 1: Fundamental principles, assessment of

general characteristics, definitions", (produced by CENELEC).

[i.8] ETSI EN 302 999: "Safety; Remote Power Feeding Installations; Safety requirements for the

erection and operation of information technology installations with remote power feeding".

[i.9] ENISA: "Power Supply Dependencies in the Electronic Communications Sector Survey, analysis

and recommendations for resilience against power supply failures", December 2013.

[i.10] CEER (Council of European Energy Regulators): "Benchmarking Report 5.2 on the Continuity of

Electricity Supply" - Ref: C14-EQS-62-03 (12 February 2015).

NOTE: Available at https://www.ceer.eu/documents/104400/-/-/cbc48e6a-5d5e-a170-ae1d-7b7b298d46a4.

[i.11] AEEGSI report 16 November 2015.
NOTE: Available at www.autorita.energia.it/allegati/com_stampa/15/151116cs.pdf.

[i.12] ETSI TS 103 553-1: "Environmental Engineering (EE); Innovative energy storage technology for

stationary use; Part 1: Overview".

[i.13] IEC EN 60950-21: "Information technology equipment. Safety. Remote power feeding".

[i.14] IEC EN 60950-22: "Information technology equipment. Safety. Equipment installed outdoors".

[i.15] IEC EN 62368-3: "Audio/video, information and communication technology equipment -

Part 3: Safety aspects for DC power transfer through communication cables and ports".

[i.16] Recommendation ITU-T L.1001: "External universal power adapter solutions for stationary

information and communication technology devices".

[i.17] IEC EN 62368-1: "Audio/video, information and communication technology equipment -

Part 1: Safety requirements".
ETSI
---------------------- Page: 10 ----------------------
SIST EN 302 099 V2.2.1:2021
9 ETSI EN 302 099 V2.2.1 (2021-02)

[i.18] Directive 2002/22/EC of the European Parliament and of the Council of 7 March 2002 as emended

by Directive 2009/136/EC of the European Parliament and of The Council of 25 November 2009,

in particular regarding the Article 23 provisions.

[i.19] ETSI EN 303 215 (V1.3.1) (2015-04): "Environmental Engineering (EE); Measurement methods

and limits for power consumption in broadband telecommunication networks equipment".

[i.20] EN 60896-2: "Stationary lead-acid batteries - General requirements and methods of test -

Part 2: Valve regulated types", (produced by CENELEC).

[i.21] TR 62102: "Electrical safety - Classification of interfaces for equipment to be connected to

information and communications technology networks", (produced by CENELEC).
[i.22] Void.

[i.23] Recommendation ITU-T L.1220 (2017-08): "Innovative energy storage technology for stationary

use - Part 1: Overview of energy storage".

[i.24] EN 60950-1: "Information technology equipment - Safety - Part 1: General requirements",

(produced by CENELEC).

[i.25] Recommendation ITU-T L.1202 (2015): "Methodologies for evaluating the performance of an up

to 400 VDC power feeding system and its environmental impact".

[i.26] ETSI ES 203 408 (V1.1.1) (2016-12): "Environmental Engineering (EE); Colour and marking of

DC cable and connecting devices".
[i.27] Broadband Forum TR-301.
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:

access network: part of a telecommunications network between the Network Termination/Access Gateway and the first

switching unit

backfeeding or reverse powering: powering architecture that can supply power to access network units from the

customer through its final distribution access copper pair
NOTE: Access network units may be ONU, ONT or remote DSL units.

centralized powering: remote powering in which the remote feeding source is located in a telecommunications centre

cluster powering: remote powering of a cluster of equipment (1 to n items of equipment), in which the remote feeding

source is located outside a telecommunications centre

electric energy provider: provider of electrical energy from the public grid (mains)

ES1, ES2, ES3: See IEC EN 62368-1 [i.17].

interface A: -48 V power interface at input of Telecom/ICT equipment with voltage range and other electrical

specifications defined in ETSI EN 300 132-2 [2]

interface A1: up to 400 VAC rms power interface at input of Telecom/ICT equipment with voltage range and other

electrical specifications defined in ETSI EN 300 132-1 [1]

interface A3: up to 400 VDC power interface at input of Telecom/ICT equipment with voltage range, and other

electrical specifications defined in
...

Draft ETSI EN 302 099 V2.1.30 (2020-10)
EUROPEAN STANDARD
Environmental Engineering (EE);
Powering of equipment in access network
---------------------- Page: 1 ----------------------
2 Draft ETSI EN 302 099 V2.1.30 (2020-10)
Reference
REN/EE-0257
Keywords
access, network, power supply, remote
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ETSI
---------------------- Page: 2 ----------------------
3 Draft ETSI EN 302 099 V2.1.30 (2020-10)
Contents

Intellectual Property Rights ................................................................................................................................ 5

Foreword ............................................................................................................................................................. 5

Modal verbs terminology .................................................................................................................................... 5

1 Scope ........................................................................................................................................................ 6

2 References ................................................................................................................................................ 6

2.1 Normative references ......................................................................................................................................... 6

2.2 Informative references ........................................................................................................................................ 8

3 Definition of terms, symbols and abbreviations ....................................................................................... 9

3.1 Terms .................................................................................................................................................................. 9

3.2 Symbols ............................................................................................................................................................ 10

3.3 Abbreviations ................................................................................................................................................... 11

4 Powering configurations......................................................................................................................... 12

4.0 General ............................................................................................................................................................. 12

4.1 Remote powering architectures ........................................................................................................................ 14

4.1.1 Centralized powering architecture configurations ...................................................................................... 14

4.1.2 Cluster powering architecture configurations ............................................................................................. 15

4.2 Local powering architecture configurations ..................................................................................................... 17

4.2.1 TE of access network, common to several customers ................................................................................. 17

4.2.2 TE of access network, at customer premises .............................................................................................. 18

4.2.3 TE in access network reverse powered from customer premises ................................................................ 19

4.2.3.1 Reference configuration introduction .................................................................................................... 19

4.2.3.2 Wiring and electrical limitation consideration ...................................................................................... 19

4.2.3.3 Reverse power, voltage and current limits ............................................................................................ 19

5 Effect of the technologies on the powering strategy .............................................................................. 19

5.0 General ............................................................................................................................................................. 19

5.1 Powering strategy of family 1: metallic links ................................................................................................... 21

5.2 Powering strategy of family 2: non-metallic links ........................................................................................... 21

6 Requirements for local powering ........................................................................................................... 21

6.1 TE including the power plant ........................................................................................................................... 21

6.2 TE powered by a DC voltage nominal -48 V or up to 400 VDC local power unit ........................................... 22

6.3 TE powered by a LPU with a DC voltage other than -48 V or up to 400 VDC ............................................... 22

6.4 TE powered by a nominal AC voltage of 230 V, 50 Hz local power unit ........................................................ 22

7 Requirements for remote powering ........................................................................................................ 22

7.0 Remote powering solutions .............................................................................................................................. 22

7.1 Input of the Remote Power Unit (RPU) ........................................................................................................... 22

7.2 Output characteristics of the Remote Powering system ................................................................................... 23

7.2.1 Remote powering output with a RFT-V circuit .......................................................................................... 23

7.2.2 Remote powering output with a RFT-C circuit........................................................................................... 23

7.2.3 Remote powering output at up to 400 VDC ............................................................................................... 23

7.2.3.0 General consideration on line electrical parameters and operation ....................................................... 23

7.2.3.1 Steady state output voltage and current ................................................................................................. 23

7.2.3.2 Transient state output voltage ............................................................................................................... 23

7.2.3.3 Architecture of RP distribution for reliable and safe operation management ....................................... 24

7.2.3.4 Requirements for stable and safe operation .......................................................................................... 25

7.3 Input characteristics of remote power receiver ................................................................................................. 25

7.3.1 RFT-V remote power receiver input in voltage mode ................................................................................ 25

7.3.2 RFT-C remote power receiver input in current mode ................................................................................. 25

7.3.3 Remote Power Receiver (RPR) input ......................................................................................................... 26

7.3.4 Remote Power Receiver (RPR) output ....................................................................................................... 26

8 Power source interruption management ................................................................................................. 26

9 Power management ................................................................................................................................ 27

ETSI
---------------------- Page: 3 ----------------------
4 Draft ETSI EN 302 099 V2.1.30 (2020-10)

10 Safety, EMC, protection ......................................................................................................................... 29

10.1 Product Safety .................................................................................................................................................. 29

10.2 EMC ................................................................................................................................................................. 30

10.3 Protection/resistibility ...................................................................................................................................... 30

10.4 Earthing and bonding of access network powering solutions ........................................................................... 30

10.5 Wiring requirements of remote power feeding to TE through power cable at up to 400 VDC voltage

mode ................................................................................................................................................................. 31

10.5.1 Protection against electric shock ................................................................................................................. 31

10.5.2 Protection against fire ................................................................................................................................. 32

10.5.3 Protection against physical damage ............................................................................................................ 32

11 Environmental conditions....................................................................................................................... 32

Annex A (informative): Statistical data on electrical power supply availability, from the Low

Voltage (LV) public grid (mains) in various European countries ............. 33

Annex B (informative): Battery sizing .................................................................................................. 37

B.0 General rules .......................................................................................................................................... 37

B.1 back-up power ........................................................................................................................................ 38

B.2 Autonomy of the back-up ....................................................................................................................... 38

B.3 Use of valve regulated lead acid battery................................................................................................. 39

B.4 Battery state of health test ...................................................................................................................... 39

Annex C (informative): Comparative reliability approach of remote powering versus local

powering ......................................................................................................... 40

Annex D (informative): Bibliography ................................................................................................... 43

History .............................................................................................................................................................. 44

ETSI
---------------------- Page: 4 ----------------------
5 Draft ETSI EN 302 099 V2.1.30 (2020-10)
Intellectual Property Rights
Essential patents

IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information

pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found

in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in

respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web

server (https://ipr.etsi.org/).

Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee

can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web

server) which are, or may be, or may become, essential to the present document.
Trademarks

The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.

ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no

right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does

not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.

Foreword

This draft European Standard (EN) has been produced by ETSI Technical Committee Environmental Engineering (EE),

and is now submitted for the combined Public Enquiry and Vote phase of the ETSI standards EN Approval Procedure.

Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa

Date of withdrawal of any conflicting National Standard (dow): 6 months after doa

Modal verbs terminology

In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and

"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of

provisions).

"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.

ETSI
---------------------- Page: 5 ----------------------
6 Draft ETSI EN 302 099 V2.1.30 (2020-10)
1 Scope

The present document describes the principles for powering of Telecommunications Equipment (TE) in access

networks (both traditional copper based and Next Generation fibre and/or hybrid based) and contains requirements for

the powering systems, laying down:

• the characteristics of the input and output interfaces of the power units; the recommendations for TE power

protection, also regarding network integrity and public services availability requirements;

• the management data, necessary to guarantee the required availability of the network and provided public

services and to ensure the maintenance of the TE power units.

The present document takes into account the innovative characteristics of fibre-based access network equipment, for

which the intrinsic limitation of the local power plants should be considered regarding the equipment installed inside

telecom centre or local exchanges or installed in streets or inside buildings: it goes from "complete integration of the

power plant in the TE" to "remote power feeding from a distant power plant".

The present document provides detailed information in annex A on the improved reliability of public electric power grid

and on the improved reliability and availability of new fibre-based NGA network. It should be considered that, for street

cabinet TE, the local power scenario is common and, in that case, the main power supply availability characteristics are

mainly based on electrical energy provider's performance.

The present document applies to the powering of all equipment of the access network (copper, fibre or radio networks)

located inside or outside telecommunications centres or local exchanges, differentiating the applicable and sustainable

power protection requirements. The access network is defined as the part of the telecommunications network, which

comprises the network termination (passive or active) that is installed inside customer premises and the first exchange

that can be also the broadband local exchange.

As innovative fibre-based and hybrid-based NGA network TE are changing the traditional powering paradigm, the

present document proposes the viable measures to comply with the integrity, availability and uninterrupted

telephone/VoIP provision that European regulatory defines for public networks [i.18].

The present document describes different configurations of powering the TE and the impacts on networks and services

continuity and reliability:

• Local power supply for TE (e.g. street cabinet, active network termination, etc.).

• Remote Feeding to TE from central office through copper access pair.
• Cluster Power supply feeding power for a cluster of TE.
• Remote power feeding to TE from centre or cluster power through a power cable.

• Back feeding or Reverse Powering architecture that can supply power to Access Network Units such as ONU

or ONT or remote DSL unit from the customer premises through its final distribution access copper pair.

2 References
2.1 Normative references

References are either specific (identified by date of publication and/or edition number or version number) or

non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the

referenced document (including any amendments) applies.

Referenced documents which are not found to be publicly available in the expected location might be found at

https://docbox.etsi.org/Reference/.

NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee

their long term validity.
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7 Draft ETSI EN 302 099 V2.1.30 (2020-10)

The following referenced documents are necessary for the application of the present document.

[1] ETSI EN 300 132-1: "Environmental Engineering (EE); Power supply interface at the input to

Information and Communication Technology (ICT) equipment; Part 1: Alternating Current (AC)".

[2] ETSI EN 300 132-2: "Environmental Engineering (EE); Power supply interface at the input of

Information and Communication Technology (ICT) equipment; Part 2: -48 V Direct Current

(DC)".

[3] IEC 62368-3: "Audio/video, information and communication technology equipment - Part 3:

Safety aspects for DC power transfer through communication cables and ports".
[4] EN 60038: "CENELEC standard Voltages", (produced by CENELEC).

[5] EN 60664-1: "Insulation coordination for equipment within low-voltage systems - Part 1:

Principles, requirements and tests", (produced by CENELEC).

[6] EN 50310: "Application of equipotential bonding and earthing in buildings with information

technology equipment", (produced by CENELEC).

[7] ETSI EN 300 253: "Environmental Engineering (EE); Earthing and bonding of ICT equipment

powered by -48 VDC in telecom and data centres".

[8] Recommendation ITU-T K.35: "Bonding configurations and earthing at remote electronic sites".

[9] Recommendation ITU-T K.45: "Resistibility of telecommunication equipment installed in the

access and trunk networks to overvoltages and overcurrents".

[10] ETSI ES 203 215: "Environmental Engineering (EE); Measurement Methods and Limits for Power

Consumption in Broadband Telecommunication Networks Equipment".

[11] ETSI EN 300 132-3: "Environmental Engineering (EE); Power supply interface at the input to

telecommunications equipment; Part 3: Operated by rectified current source, alternating current

source or direct current source up to 400 V".

NOTE: A revision is on-going in ETSI and this document should become ETSI EN 300 132-3-1: "Direct current

source up to 400 V".

[12] ETSI ES 202 336-1: "Environmental Engineering (EE); Monitoring and Control Interface for

Infrastructure Equipment (Power, Cooling and Building Environment Systems used in

Telecommunication Networks); Part 1: Generic Interface".

[13] ETSI TS 101 548-1: "Access, Terminals, Transmission and Multiplexing (ATTM); European

Requirements for Reverse Powering of Remote Access Equipment; Part 1: Twisted pair

networks".

[14] ETSI EN 301 605: "Environmental Engineering (EE); Earthing and bonding of 400 VDC data and

telecom (ICT) equipment".

[15] Recommendation ITU-T L.1200 (May 2012): "Direct current power feeding interface up to 400 V

at the input to telecommunication and ICT equipment".

[16] HD 60364 series: "Low Voltage electrical installations material", produced by CENELEC.

[17] ETSI ES 202 336-8: "Environmental Engineering (EE); Monitoring and Control Interface for

Infrastructure Equipment (Power, Cooling and Building Environment Systems used in

Telecommunication Networks); Part 8: Remote Power Feeding System control and monitoring

information model".
ETSI
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8 Draft ETSI EN 302 099 V2.1.30 (2020-10)
2.2 Informative references

References are either specific (identified by date of publication and/or edition number or version number) or

non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the

referenced document (including any amendments) applies.

NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee

their long term validity.

The following referenced documents are not necessary for the application of the present document but they assist the

user with regard to a particular subject area.

[i.1] ETSI EN 300 019-1-1: "Environmental Engineering (EE); Environmental conditions and

environmental tests for telecommunications equipment; Part 1-1: Classification of environmental

conditions; Storage".

[i.2] ETSI EN 300 019-1-3: "Environmental Engineering (EE); Environmental conditions and

environmental tests for telecommunications equipment; Part 1-3: Classification of environmental

conditions; Stationary use at weather protected locations".

[i.3] ETSI EN 300 019-1-4: "Environmental Engineering (EE); Environmental conditions and

environmental tests for telecommunications equipment; Part 1-4: Classification of environmental

conditions; Stationary use at non-weather protected locations".

[i.4] ETSI EN 300 019-1-8: "Environmental Engineering (EE); Environmental conditions and

environmental tests for telecommunications equipment; Part 1-8: Classification of environmental

conditions; Stationary use at underground locations".
[i.5] Void.
[i.6] Void.

[i.7] HD 60364-1: "Low-voltage electrical installations - Part 1: Fundamental principles, assessment of

general characteristics, definitions", produced by CENELEC.

[i.8] ETSI EN 302 999: "Safety; Remote Power Feeding Installations; Safety requirements for the

erection and operation of information technology installations with remote power feeding".

[i.9] ENISA: "Power Supply Dependencies in the Electronic Communications Sector Survey, analysis

and recommendations for resilience against power supply failures" - December 2013.

[i.10] CEER (Council of European Energy Regulators): "Benchmarking Report 5.2 on the Continuity of

Electricity Supply" - Ref: C14-EQS-62-03 (12 February 2015).

NOTE: Available at https://www.ceer.eu/documents/104400/-/-/cbc48e6a-5d5e-a170-ae1d-7b7b298d46a4.

[i.11] AEEGSI report 16 November 2015.
NOTE: Available at www.autorita.energia.it/allegati/com_stampa/15/151116cs.pdf.

[i.12] ETSI TS 103 553-1: "Environmental Engineering (EE); Innovative energy storage technology for

stationary use; Part 1: Overview".

[i.13] IEC EN 60950-21: "Information technology equipment. Safety. Remote power feeding".

[i.14] IEC EN 60950-22: "Information technology equipment. Safety. Equipment installed outdoors".

[i.15] IEC EN 62368-3: "Audio/video, information and communication technology equipment -

Part 3: Safety aspects for DC power transfer through communication cables and ports".

[i.16] Recommendation ITU-T L.1001: "External universal power adapter solutions for stationary

information and communication technology devices".

[i.17] IEC EN 62368-1: "Audio/video, information and communication technology equipment -

Part 1: Safety requirements".
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9 Draft ETSI EN 302 099 V2.1.30 (2020-10)

[i.18] Directive 2002/22/EC of the European Parliament and of the Council of 7 March 2002 as emended

by Directive 2009/136/EC of the European Parliament and of The Council of 25 November 2009,

in particular regarding the Article 23 provisions.

[i.19] ETSI EN 303 215 (V1.3.1) (2015-04): "Environmental Engineering (EE); Measurement methods

and limits for power consumption in broadband telecommunication networks equipment".

[i.20] EN 60896-2: "Stationary lead-acid batteries - General requirements and methods of test -

Part 2: Valve regulated types", produced by CENELEC.

[i.21] TR 62102: "Electrical safety - Classification of interfaces for equipment to be connected to

information and communications technology networks", produced by CENELEC.
[i.22] Void.

[i.23] Recommendation ITU-T L.1220 (2017-08): "Innovative energy storage technology for stationary

use - Part 1: Overview of energy storage".

[i.24] EN 60950-1: "Information technology equipment - Safety - Part 1: General requirements",

produced by CENELEC.

[i.25] Recommendation ITU-T L.1202 (2015): "Methodologies for evaluating the performance of an up

to 400 VDC power feeding system and its environmental impact".

[i.26] ETSI ES 203 408 (V1.1.1) (2016-12): "Environmental Engineering (EE); Colour and marking of

DC cable and connecting devices".
[i.27] Broadband Forum TR-301.
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document the following terms apply:

access network: part of a telecommunications network between the Network Termination/Access Gateway and the first

switching unit

backfeeding or reverse powering: powering architecture that can supply power to access network units from the

customer through its final distribution access copper pair
NOTE: Access network units may be ONU, ONT or remote DSL units.

centralized powering: remote powering in which the remote feeding source is located in a telecommunications centre

cluster powering: remote powering of a cluster of equipment (1 to n items of equipment), in which the remote feeding

source is located outside a telecommunications centre

electric energy provider: provider of electrical energy from the public grid (mains)

ES1, ES2, ES3: See IEC EN 62368-1 [i.17].

interface A: -48 V power interface at input of Telecom/ICT equipment with voltage range and other electrical

specifications defined in ETSI EN 300 132-2 [2]

interface A1: up to 400 VAC rms power interface at input of Telecom/ICT equipment with voltage range and other

electrical specifications defined in ETSI EN 300 132-1 [1]

interface A3: up to 400 VDC power interface at input of Telecom/ICT equipment with voltage range, and other

electrical specifications defined in ETSI EN 300 132-3 [11]
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Local Power Unit (LPU): power supply equipment whose function is to supply a telecommunication equipment

situated at the same location

NOTE: It is generally locally connected to the mains and provides DC or AC voltage output to feed

telecommunication equipment.

local powering: powering principle of a telecommunications equipment by a (dedicated) power unit implemented in the

same location
primary circuit: See IEC EN 62368-1 [i.17].

protective device selectivity: coordination of the operating characteristics of two or more protective devices to ensure

faulty equipment is safely disconnected with no or limited impact on other parts of the system

PS1, PS2, PS3: See IEC EN 62368-1 [i.17].
Rem
...

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