SIST EN 302 099 V2.1.1:2014
(Main)Environmental Engineering (EE) - Powering of equipment in access network
Environmental Engineering (EE) - Powering of equipment in access network
The present document describes the principles for powering of Telecommunications Equipment (TE) in access networks and contains requirements for the powering systems, laying down:
• the characteristics of the input and output interfaces of the power units;
• the power back-up conditions for TE including a power unit;
• the management data, necessary to guarantee the availability of the service and to ensure the maintenance of the power units.
The present document takes into account the characteristics of access network equipment for which the limits of responsibility in the installation or design of the power plants are very different than for equipment of telecom centre: it goes from "complete integration of the power plant in the TE" to "remote power feeding from a distant power plant". The present document applies to the powering of all equipment of the access network (copper, fibre or radio networks) located outside telecommunications centres. The access network is defined as the part of the telecommunications
network, which comprises the customer terminal installation and the first exchange (switching unit). The customer terminal and the switching unit are excluded from the application field of the present document. The present document describes different configurations of powering the TE:
• Local power supply for TE.
• Remote Feeding to TE from centre through copper access pair.
• Cluster Power supply feeding power for a cluster of TE.
• 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
Ta dokument opisuje principe napajanja telekomunikacijske opreme (TE) v dostopovnih omrežjih in vsebuje zahteve za napajalne sisteme, pri čemer določa:
• značilnosti vhodnih in izhodnih vmesnikov pogonskih enot;
• pogoje za pomožno napajanje za telekomunikacijsko opremo, vključno s pogonsko enoto;
• podatke o upravljanju, ki so potrebni za zagotovitev razpoložljivosti storitve in vzdrževanja pogonskih enot.
Ta dokument upošteva značilnosti opreme v dostopovnem omrežju, pri katerih so omejitve odgovornosti v namestitvi ali načrtovanju elektrarn zelo drugačne od omejitev za telekomunikacijski center: od »popolne integracije elektrarne v telekomunikacijsko opremo« do »oddaljenega napajanja iz oddaljene elektrarne«. Ta dokument velja za napajanje vse opreme v dostopovnem omrežju (bakrena, optična ali radijska omrežja), ki se nahaja izven telekomunikacijskih centrov. Dostopovno omrežje je definirano kot del telekomunikacijskega
omrežja, ki obsega namestitev priključka stranke in prvo izmenjavo (preklopno enoto). Priključek stranke in preklopna enota sta izključena iz področja uporabe v tem dokumentu. Dokument opisuje različne konfiguracije napajanja telekomunikacijske opreme:
• Lokalno napajanje za telekomunikacijsko opremo.
• Daljinsko napajanje telekomunikacijske opreme iz centra prek bakrenega dostopovnega para.
• Skupno napajanje za skupino telekomunikacijskih naprav.
• Odvajanje napajanja ali obratno napajanje, ki je sposobno dovajati elektriko enotam dostopovnega omrežja, kot so ONU ali ONT, ali oddaljeni enoti DS pri stranki prek končnega bakrenega dostopovnega para.
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Okoljski inženiring (EE) - Napajanje opreme v dostopovnem omrežjuEnvironmental Engineering (EE) - Powering of equipment in access network33.050.01Telekomunikacijska terminalska oprema na splošnoTelecommunication terminal equipment in general19.040Preskušanje v zvezi z okoljemEnvironmental testingICS:Ta slovenski standard je istoveten z:EN 302 099 Version 2.1.1SIST EN 302 099 V2.1.1:2014en01-oktober-2014SIST EN 302 099 V2.1.1:2014SLOVENSKI
STANDARD
SIST EN 302 099 V2.1.1:2014
ETSI EN 302 099 V2.1.1 (2014-08) Environmental Engineering (EE); Powering of equipment in access network
EUROPEAN STANDARD SIST EN 302 099 V2.1.1:2014
ETSI ETSI EN 302 099 V2.1.1 (2014-08) 2
Reference REN/EE-02043 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 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 only prevailing document is the print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat. 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 http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http://portal.etsi.org/chaircor/ETSI_support.asp 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.
© European Telecommunications Standards Institute 2014. All rights reserved.
DECTTM, PLUGTESTSTM, UMTSTM and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTETM are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association. SIST EN 302 099 V2.1.1:2014
ETSI ETSI EN 302 099 V2.1.1 (2014-08) 3 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 . 7 3 Definitions and abbreviations . 8 3.1 Definitions . 8 3.2 Abbreviations . 9 4 Powering configurations. 9 4.1 Remote powering . 11 4.1.1 Centralized powering . 11 4.1.2 Cluster powering . 11 4.2 Local powering . 12 4.2.1 TE of access network, common to several customers . 12 4.2.2 TE of access network, at customer's home . 13 4.2.3 TE in access network reverse powered from customer home . 14 5 Effect of the technologies on the powering strategy . 15 5.1 Powering strategy of family 1: metallic links . 16 5.2 Powering strategy of family 2: non-metallic links . 16 6 Requirements for local powering . 17 6.1 TE including the power plant . 17 6.2 TE powered by a dc voltage nominal -48 V local power unit . 17 6.3 TE powered by a LPU with a dc voltage other than -48 V . 17 6.4 TE powered by a nominal ac voltage of 230 V, 50 Hz local power unit . 17 7 Requirements for remote powering . 17 7.1 Input of the Remote Power Unit . 17 7.2 Output of the Remote Power Unit . 18 7.3 Input characteristics of remote powered receiver in the voltage mode . 18 7.4 Input characteristics of remote powered receiver in the current mode . 18 8 Power back-up . 18 9 Power management . 18 10 Safety, EMC, protection . 20 10.1 Product Safety . 20 10.2 EMC . 21 10.3 Protection/resistibility . 21 10.4 Bonding and earthing . 21 11 Environmental conditions. 22 Annex A (normative): Battery sizing . 23 A.1 Back-up power for telephone service . 23 A.2 Autonomy of the back-up . 23 A.3 Use of valve regulated lead acid battery. 24 A.4 End of service life of battery . 24 SIST EN 302 099 V2.1.1:2014
ETSI ETSI EN 302 099 V2.1.1 (2014-08) 4 Annex B (informative): Bibliography . 25 History . 26
SIST EN 302 099 V2.1.1:2014
ETSI ETSI EN 302 099 V2.1.1 (2014-08) 5 Intellectual Property Rights IPRs essential or potentially essential to the present document 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 (http://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. Foreword This European Standard (EN) has been produced by ETSI Technical Committee Environmental Engineering (EE).
National transposition dates Date of adoption of this EN: 18 August 2014 Date of latest announcement of this EN (doa): 30 November 2014 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
31 May 2015 Date of withdrawal of any conflicting National Standard (dow): 31 May 2015
Modal verbs terminology In the present document "shall", "shall not", "should", "should not", "may", "may not", "need", "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. SIST EN 302 099 V2.1.1:2014
ETSI ETSI EN 302 099 V2.1.1 (2014-08) 6 1 Scope The present document describes the principles for powering of Telecommunications Equipment (TE) in access networks and contains requirements for the powering systems, laying down: • the characteristics of the input and output interfaces of the power units; • the power back-up conditions for TE including a power unit; • the management data, necessary to guarantee the availability of the service and to ensure the maintenance of the power units. The present document takes into account the characteristics of access network equipment for which the limits of responsibility in the installation or design of the power plants are very different than for equipment of telecom centre: it goes from "complete integration of the power plant in the TE" to "remote power feeding from a distant power plant". The present document applies to the powering of all equipment of the access network (copper, fibre or radio networks) located outside telecommunications centres. The access network is defined as the part of the telecommunications network, which comprises the customer terminal installation and the first exchange (switching unit). The customer terminal and the switching unit are excluded from the application field of the present document. The present document describes different configurations of powering the TE: • Local power supply for TE. • Remote Feeding to TE from centre through copper access pair. • Cluster Power supply feeding power for a cluster of TE. • 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 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 reference document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at http://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. 2.1 Normative references The following referenced documents are necessary for the application of the present document.
[1] ETSI ETS 300 132-1: "Equipment Engineering (EE); Power supply interface at the input to telecommunications equipment; Part 1: Operated by alternating current (ac) derived from direct current (dc) sources". [2] ETSI EN 300 132-2: "Environmental Engineering (EE); Power supply interface at the input to telecommunications and datacom (ICT) equipment; Part 2: Operated by -48 V direct current (dc)". [3] CENELEC EN 60950-1: "Information technology equipment - Safety - Part 1: General requirements". [4] IEC 60950-21: "Safety of information technology equipment - Part 21: Remote power feeding". SIST EN 302 099 V2.1.1:2014
ETSI ETSI EN 302 099 V2.1.1 (2014-08) 7 [5] CENELEC/IEC EN 60038: "CENELEC/IEC standard voltages". [6] CENELEC EN 60664-1: "Insulation coordination for equipment within low-voltage systems - Part 1: Principles, requirements and tests". [7] CENELEC EN 50310: "Application of equipotential bonding and earthing in buildings with information technology equipment". [8] CENELEC EN 60896-2: "Stationary lead-acid batteries - General requirements and methods of test - Part 2: Valve regulated types". [9] ETSI EN 300 253: "Environmental Engineering (EE); Earthing and bonding of telecommunication equipment in telecommunication centres". [10] Recommendation ITU-T K.35: "Bonding configurations and earthing at remote electronic sites". [11] CENELEC TR 62102: "Electrical safety - Classification of interfaces for equipment to be connected to information and communications technology networks". [12] Recommendation ITU-T K.45: "Resistibility of telecommunication equipment installed in the access and trunk networks to overvoltages and overcurrents". [13] ETSI ES 203 215: "Environmental Engineering (EE); Measurement Methods and Limits for Power Consumption in Broadband Telecommunication Networks Equipment". [14] ETSI EN 300 132-3-1: "Environmental Engineering (EE); Power supply interface at the input to telecommunications and datacom (ICT) equipment; Part 3: Operated by rectified current source, alternating current source or direct current source up to 400 V; Sub-part 1: Direct current source up to 400 V". [15] 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". 2.2 Informative references 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 weatherprotected 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-weatherprotected 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] ETSI TR 102 629: "Access, Terminals, Transmission and Multiplexing (ATTM); Reverse Power Feed for Remote Nodes". [i.6] ETSI EN 301 605: "Environmental Engineering (EE); Earthing and bonding of 400 VDC data and telecom (ICT) equipment". [i.7] ETSI TR 102 614: "Environmental Engineering (EE); Reverse powering of access network unit by end-user equipment: A4 interface". SIST EN 302 099 V2.1.1:2014
ETSI ETSI EN 302 099 V2.1.1 (2014-08) 8 [i.8] CENELEC HD 60364-1: "Low-voltage electrical installations - Part 1: Fundamental principles, assessment of general characteristics, definitions". [i.9] ETSI EN 302 999: "Safety; Remote Power Feeding Installations; Safety requirements for the erection and operation of information technology installations with remote power feeding". 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document the following terms and definitions apply: access network: part of a telecommunications network between the customer terminal installation 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 distant power receiver: power equipment electrically connected to a Remote Power Unit NOTE: Its function is to supply telecommunications equipment situated at the same location. It may be combined with the item of telecommunications equipment itself. hazardous voltage: See EN 60950-1 [3]. 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 EN 60950-1 [3]. Remote Feeding Telecommunication (RFT) circuit: secondary circuit within the equipment, intended to supply or receive dc power via a telecommunication network at voltages equal to or exceeding the limits for TNV circuits, and on which overvoltages from telecommunication networks are possible Remote Power Unit (RPU): power unit, connected to the mains or from a centralized power plant, which supplies distant telecommunications equipment remote powering: power feeding of a telecommunications equipment by a remote power circuit NOTE: Such a circuit consists of a remote power unit, distribution wiring, and fed receivers. RFT-C circuit: RFT circuit which is so designed and protected that under normal operating conditions and single fault conditions the currents in the circuit do not exceed defined values RFT-V circuit: RFT circuit which is so designed and protected that under normal operating conditions and single fault conditions the voltages are limited and the accessible area of contact is limited secondary circuit: See EN 60950-1 [3]. SELV circuit: See EN 60950-1 [3]. SIST EN 302 099 V2.1.1:2014
ETSI ETSI EN 302 099 V2.1.1 (2014-08) 9 TN-C: See CENELEC HD 60364-1 [i.8]. TN-S: See CENELEC HD 60364-1 [i.8]. TNV circuit: See EN 60950-1 [3]. TT: See CENELEC HD 60364-1 [i.8]. 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: ac alternating current AN Access Node ANU Access Network Unit CH Customer's Home CPE Customer's Premises Equipment dc direct current DC/DC Direct Current/Direct Current DSL Digital Subscriber Line EMC ElectroMagnetic Compatibility FTTB Fibre To The Building FTTC Fibre To The Curb FTTCab Fibre To The Cabinet FTTDp Fibre To The Distribution point FTTH Fibre To The Home HD Harmonization Document ICT Information & Communication Technology IEC International Electrical Committee ISDN Integrated Services Digital Network IT Information Technology ITU-T International Telecommunication Union - Sector Telecommunication (T) LED Light Emitting Diode LPU Local Power Unit ONT Optical Network Termination ONU Optical Network Unit P Power PG Power Gathering PW Power Way RFT Remote Feeding Telecommunication RFT-C Remote Feeding Telecommunication-Current RFT-V Remote Feeding Telecommunication-Voltage RPU Remote Power Unit S Signal S/Pfilter filter separating signal S and power P SELV Safety Extra Low Voltage TC Telecommunication's Centre TE Telecom Equipment TNV Telecommunication Network Voltage UPS Uninterruptible Power Supply 4 Powering configurations The main characteristic feature of the different powering architectures of access network equipment is the location of the following two functions:
• the point of connection to the mains; and • the place of power back-up. SIST EN 302 099 V2.1.1:2014
ETSI ETSI EN 302 099 V2.1.1 (2014-08) 10 The total network can be divided in three main parts: 1) the Telecommunication Centre (TC); 2) the field (the undefined area between the Telecom Centre and the Customer's Home); 3) the Customer's Home (CH). Powering architectures Equipment of access networks can be powered remotely from a telecommunications centre (centralized powering) or from a power supply node (cluster powering), or locally from the mains (local powering). Inside these three main powering architectures, several configurations of powering are used. They are summarized in the clauses 4.1 to 4.2 and in the figures 1, 2 and 3 by the acronyms PW1 to PW 10 (for powering). Power back-up For the telephone service, which needs to provide an available service even in the case of a mains outage, a power back-up unit is located either in the remote power source or in the equipment powered. The clauses 4.1 to 4.2 detail the different installation configurations. Location of the Telecom Equipment (TE) On the figures 1, 2 and 3 of the following clauses, the TE in access network is schematically represented in the field. These figures mean that the TE can be implemented in different types of locations: • in a customer's office; • in a building, public or private; • in an indoor cabinet; • in a street cabinet; • on a pole cabinet; • in a telecommunications manhole, etc. The TE provides services for several customers or for one professional customer. On figure 3, the TE can be located at customer's home and provides services for only one private customer.
Power interfaces Six power-feeding interfaces are mentioned in the following clauses: They are as follows:
I0 = Power interface between a -48 V/-60 V power plant and the fed equipment in a telecom centre. It fits with the interface "A" according to EN 300 132-2 [2]. I1 = Power interface between the public mains (commercial ac) and the fed equipment. It shall comply with the voltage defined in EN 60038 [5]. I2 = Power interface at the output of a remote power source. I3 = Power interface at the input of a distant power receiver interface, in remote powering. I4 = Power interface between a local power unit and the fed equipment, in local powering. It fits with the interface "A" according to EN 300 132-2 [2] or with the interface defined in clauses 6.2 to 6.4.
I5 = Power interface between the equipment in a telecom centre and one of the following: i) the public mains (commercial ac); or ii) emergency power (UPS, diesel generator); or iii)
interface "A" that shall comply with ETS 300 132-1 [1]; or SIST EN 302 099 V2.1.1:2014
ETSI ETSI EN 302 099 V2.1.1 (2014-08) 11 iv) interface "A3" that shall comply with EN 300 132-3-1 [14]. Nominal AC voltage shall comply with the voltage defined in EN 60038 [5]. I6 = Power Interface from the customer. When using the telecom pair to transmit power, the voltage is 60 V DC
maximum and peaks are limited according to TR 102 614 [i.7] and EN 60950-1 [3]. Under specific conditions ensuring proper operation, safety and reliability for POTS or DSL lines, a maximum of 120 V DC voltage option is possible from point of connexion outside of the customer premises (same limits as for ISDN voltage). 4.1 Remote powering 4.1.1 Centralized powering The different power supply configurations are detailed in figure 1. The output of the power source is defined at interface I2. It comes from a TE (PW1a) or from a specific remote power unit (RPU in PW1b). Interface I0 corresponds to the input of the RPU. The remote power unit consists of protection and distribution devices and, possibly, power conversion equipment. Interface I5 corresponds to Interface I1 and is located in the telecommunication centre. In some cases, the TE of the access network may be equipped with a battery providing additional power in periods of heavy traffic (PW3). This battery is recharged by the remote power supply during periods of light traffic. CentralPowerSupply
TERemotePowerUnitTE TECustomerterminalCustomer'shomeAccess network equipmentPW1aPW333222300AdAdditional power source (for traffic)AdTelecommunicationscentre TE2RemotePowerUnit TE2TE333355PW2bPW1bPW2aTE Figure 1: Centralized powering 4.1.2 Cluster powering The different possible power supply configurations are detailed in figure 2. The remote power source, called Remote Power Unit (RPU), serves a group of distant telecommunications equipment, from 1 to n. The RPU is installed in a location (building, outdoor cabinet, manhole, etc.) which is distinct from the TE's building, cabinet or manhole. The telephone service is backed up by batteries located either at the remote power unit (remote powering with back-up at source, PW4) or in the telecommunications equipment (remote powering with local back-up, PW5).
SIST EN 302 099 V2.1.1:2014
ETSI ETSI EN 302 099 V2.1.1 (2014-08) 12 The voltage on I2 and I3 is limited as defined in table 3 of clause 10.1. Telecom-municationscentreAccess network equipmentCustomer'shomePW5PW4CustomerterminalRemotePowerUnitRemotePowerUnit TETE Figure 2: Cluster powering 4.2 Local powering 4.2.1 TE of access network, common to several customers The different possible local power supply configurations are detailed in figure 3. They are the following two basic types: - The telecommunications equipment is powered (Interface I4) through a Local Power Unit (LPU in PW6) providing the functions of protection, power conversion and back-up of telephone service. It is either housed in the telecommunications equipment rack or installed in an independent mounting, but always in the same building or location as the TE. - The telecommunications equipment is powered directly from the mains at Interface I1 (PW7). It includes protection devices, power conversion equipment and back-up blocks for telephone service. SIST EN 302 099 V2.1.1:2014
ETSI ETSI EN 302 099 V2.1.1 (2014-08) 13 Telecom-municationscentreT.E.T.E.T.E.L.P.U.LocalPowerUnitTelecomEquipmentCustomer terminalPW9PW8PW7PW6Customer's homeAccess network equipmentPW10 ANInterface "A"xDSLS/PPGS/PxDSLPOTS or ISDNPSUAC plugPCPEEnduser Terminalor HGWANUCu pairoptical fibrePPoweroptionI6Interface "A4"POTSP
- reverse poweringS
- standard signal interfaceS/P
- Signal/Power FilterPG
- Power gathering (or combining) interface
with S/P filter functionAN
- Access Node (ONU or DSLAM )ANU - Access Network Unit Figure 3: Local powering configurations 4.2.2 TE of access network, at customer's home The TE is located in a customer's home and provides services for a single private customer. Two types of power feeding are defined in local powering architecture: • the telecommunications equipment is powered (interface I4) through a Local Power Unit (PW8) which may additionally provide backup; SIST EN 302 099 V2.1.1:2014
ETSI ETSI EN 302 099 V2.1.1 (2014-08) 14 • the telecommunications equipment usually provides back-up for telephone service when supplied by the mains or by UPS (PW9). 4.2.3 TE in access network reverse powered from customer home The ANU, ONU or remote DSL unit or any kind of access telecom equipment between a telecom centre and the customer premises and is generally located in FTTB, FTTD
...
ETSI EN 302 099 V2.1.1 (2014-08)
EUROPEAN STANDARD
Environmental Engineering (EE);
Powering of equipment in access network
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2 ETSI EN 302 099 V2.1.1 (2014-08)
Reference
REN/EE-02043
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
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 only prevailing document is the
print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat.
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
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
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.
© European Telecommunications Standards Institute 2014.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM TM
3GPP and LTE are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
---------------------- Page: 2 ----------------------
3 ETSI EN 302 099 V2.1.1 (2014-08)
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 . 7
3 Definitions and abbreviations . 8
3.1 Definitions . 8
3.2 Abbreviations . 9
4 Powering configurations. 9
4.1 Remote powering . 11
4.1.1 Centralized powering . 11
4.1.2 Cluster powering . 11
4.2 Local powering . 12
4.2.1 TE of access network, common to several customers . 12
4.2.2 TE of access network, at customer's home . 13
4.2.3 TE in access network reverse powered from customer home . 14
5 Effect of the technologies on the powering strategy . 15
5.1 Powering strategy of family 1: metallic links . 16
5.2 Powering strategy of family 2: non-metallic links . 16
6 Requirements for local powering . 17
6.1 TE including the power plant . 17
6.2 TE powered by a dc voltage nominal -48 V local power unit . 17
6.3 TE powered by a LPU with a dc voltage other than -48 V . 17
6.4 TE powered by a nominal ac voltage of 230 V, 50 Hz local power unit . 17
7 Requirements for remote powering . 17
7.1 Input of the Remote Power Unit . 17
7.2 Output of the Remote Power Unit . 18
7.3 Input characteristics of remote powered receiver in the voltage mode . 18
7.4 Input characteristics of remote powered receiver in the current mode . 18
8 Power back-up . 18
9 Power management . 18
10 Safety, EMC, protection . 20
10.1 Product Safety . 20
10.2 EMC . 21
10.3 Protection/resistibility . 21
10.4 Bonding and earthing . 21
11 Environmental conditions. 22
Annex A (normative): Battery sizing . 23
A.1 Back-up power for telephone service . 23
A.2 Autonomy of the back-up . 23
A.3 Use of valve regulated lead acid battery. 24
A.4 End of service life of battery . 24
ETSI
---------------------- Page: 3 ----------------------
4 ETSI EN 302 099 V2.1.1 (2014-08)
Annex B (informative): Bibliography . 25
History . 26
ETSI
---------------------- Page: 4 ----------------------
5 ETSI EN 302 099 V2.1.1 (2014-08)
Intellectual Property Rights
IPRs essential or potentially essential to the present document 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 (http://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.
Foreword
This European Standard (EN) has been produced by ETSI Technical Committee Environmental Engineering (EE).
National transposition dates
Date of adoption of this EN: 18 August 2014
Date of latest announcement of this EN (doa): 30 November 2014
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 May 2015
Date of withdrawal of any conflicting National Standard (dow): 31 May 2015
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "may not", "need", "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 V2.1.1 (2014-08)
1 Scope
The present document describes the principles for powering of Telecommunications Equipment (TE) in access
networks and contains requirements for the powering systems, laying down:
• the characteristics of the input and output interfaces of the power units;
• the power back-up conditions for TE including a power unit;
• the management data, necessary to guarantee the availability of the service and to ensure the maintenance of
the power units.
The present document takes into account the characteristics of access network equipment for which the limits of
responsibility in the installation or design of the power plants are very different than for equipment of telecom centre: it
goes from "complete integration of the power plant in the TE" to "remote power feeding from a distant power plant".
The present document applies to the powering of all equipment of the access network (copper, fibre or radio networks)
located outside telecommunications centres. The access network is defined as the part of the telecommunications
network, which comprises the customer terminal installation and the first exchange (switching unit). The customer
terminal and the switching unit are excluded from the application field of the present document.
The present document describes different configurations of powering the TE:
• Local power supply for TE.
• Remote Feeding to TE from centre through copper access pair.
• Cluster Power supply feeding power for a cluster of TE.
• 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
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
reference document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://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.
2.1 Normative references
The following referenced documents are necessary for the application of the present document.
[1] ETSI ETS 300 132-1: "Equipment Engineering (EE); Power supply interface at the input to
telecommunications equipment; Part 1: Operated by alternating current (ac) derived from direct
current (dc) sources".
[2] ETSI EN 300 132-2: "Environmental Engineering (EE); Power supply interface at the input to
telecommunications and datacom (ICT) equipment; Part 2: Operated by -48 V direct current (dc)".
[3] CENELEC EN 60950-1: "Information technology equipment - Safety - Part 1: General
requirements".
[4] IEC 60950-21: "Safety of information technology equipment - Part 21: Remote power feeding".
ETSI
---------------------- Page: 6 ----------------------
7 ETSI EN 302 099 V2.1.1 (2014-08)
[5] CENELEC/IEC EN 60038: "CENELEC/IEC standard voltages".
[6] CENELEC EN 60664-1: "Insulation coordination for equipment within low-voltage systems -
Part 1: Principles, requirements and tests".
[7] CENELEC EN 50310: "Application of equipotential bonding and earthing in buildings with
information technology equipment".
[8] CENELEC EN 60896-2: "Stationary lead-acid batteries - General requirements and methods of
test - Part 2: Valve regulated types".
[9] ETSI EN 300 253: "Environmental Engineering (EE); Earthing and bonding of telecommunication
equipment in telecommunication centres".
[10] Recommendation ITU-T K.35: "Bonding configurations and earthing at remote electronic sites".
[11] CENELEC TR 62102: "Electrical safety - Classification of interfaces for equipment to be
connected to information and communications technology networks".
[12] Recommendation ITU-T K.45: "Resistibility of telecommunication equipment installed in the
access and trunk networks to overvoltages and overcurrents".
[13] ETSI ES 203 215: "Environmental Engineering (EE); Measurement Methods and Limits for Power
Consumption in Broadband Telecommunication Networks Equipment".
[14] ETSI EN 300 132-3-1: "Environmental Engineering (EE); Power supply interface at the input to
telecommunications and datacom (ICT) equipment; Part 3: Operated by rectified current source,
alternating current source or direct current source up to 400 V; Sub-part 1: Direct current source
up to 400 V".
[15] 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".
2.2 Informative references
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 weatherprotected 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-weatherprotected 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] ETSI TR 102 629: "Access, Terminals, Transmission and Multiplexing (ATTM); Reverse Power
Feed for Remote Nodes".
[i.6] ETSI EN 301 605: "Environmental Engineering (EE); Earthing and bonding of 400 VDC data and
telecom (ICT) equipment".
[i.7] ETSI TR 102 614: "Environmental Engineering (EE); Reverse powering of access network unit by
end-user equipment: A4 interface".
ETSI
---------------------- Page: 7 ----------------------
8 ETSI EN 302 099 V2.1.1 (2014-08)
[i.8] CENELEC HD 60364-1: "Low-voltage electrical installations - Part 1: Fundamental principles,
assessment of general characteristics, definitions".
[i.9] ETSI EN 302 999: "Safety; Remote Power Feeding Installations; Safety requirements for the
erection and operation of information technology installations with remote power feeding".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document the following terms and definitions apply:
access network: part of a telecommunications network between the customer terminal installation 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
distant power receiver: power equipment electrically connected to a Remote Power Unit
NOTE: Its function is to supply telecommunications equipment situated at the same location. It may be combined
with the item of telecommunications equipment itself.
hazardous voltage: See EN 60950-1 [3].
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 EN 60950-1 [3].
Remote Feeding Telecommunication (RFT) circuit: secondary circuit within the equipment, intended to supply or
receive dc power via a telecommunication network at voltages equal to or exceeding the limits for TNV circuits, and on
which overvoltages from telecommunication networks are possible
Remote Power Unit (RPU): power unit, connected to the mains or from a centralized power plant, which supplies
distant telecommunications equipment
remote powering: power feeding of a telecommunications equipment by a remote power circuit
NOTE: Such a circuit consists of a remote power unit, distribution wiring, and fed receivers.
RFT-C circuit: RFT circuit which is so designed and protected that under normal operating conditions and single fault
conditions the currents in the circuit do not exceed defined values
RFT-V circuit: RFT circuit which is so designed and protected that under normal operating conditions and single fault
conditions the voltages are limited and the accessible area of contact is limited
secondary circuit: See EN 60950-1 [3].
SELV circuit: See EN 60950-1 [3].
ETSI
---------------------- Page: 8 ----------------------
9 ETSI EN 302 099 V2.1.1 (2014-08)
TN-C: See CENELEC HD 60364-1 [i.8].
TN-S: See CENELEC HD 60364-1 [i.8].
TNV circuit: See EN 60950-1 [3].
TT: See CENELEC HD 60364-1 [i.8].
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ac alternating current
AN Access Node
ANU Access Network Unit
CH Customer's Home
CPE Customer's Premises Equipment
dc direct current
DC/DC Direct Current/Direct Current
DSL Digital Subscriber Line
EMC ElectroMagnetic Compatibility
FTTB Fibre To The Building
FTTC Fibre To The Curb
FTTCab Fibre To The Cabinet
FTTDp Fibre To The Distribution point
FTTH Fibre To The Home
HD Harmonization Document
ICT Information & Communication Technology
IEC International Electrical Committee
ISDN Integrated Services Digital Network
IT Information Technology
ITU-T International Telecommunication Union - Sector Telecommunication (T)
LED Light Emitting Diode
LPU Local Power Unit
ONT Optical Network Termination
ONU Optical Network Unit
P Power
PG Power Gathering
PW Power Way
RFT Remote Feeding Telecommunication
RFT-C Remote Feeding Telecommunication-Current
RFT-V Remote Feeding Telecommunication-Voltage
RPU Remote Power Unit
S Signal
S/P filter separating signal S and power P
filter
SELV Safety Extra Low Voltage
TC Telecommunication's Centre
TE Telecom Equipment
TNV Telecommunication Network Voltage
UPS Uninterruptible Power Supply
4 Powering configurations
The main characteristic feature of the different powering architectures of access network equipment is the location of
the following two functions:
• the point of connection to the mains; and
• the place of power back-up.
ETSI
---------------------- Page: 9 ----------------------
10 ETSI EN 302 099 V2.1.1 (2014-08)
The total network can be divided in three main parts:
1) the Telecommunication Centre (TC);
2) the field (the undefined area between the Telecom Centre and the Customer's Home);
3) the Customer's Home (CH).
Powering architectures
Equipment of access networks can be powered remotely from a telecommunications centre (centralized powering) or
from a power supply node (cluster powering), or locally from the mains (local powering). Inside these three main
powering architectures, several configurations of powering are used. They are summarized in the clauses 4.1 to 4.2 and
in the figures 1, 2 and 3 by the acronyms PW1 to PW 10 (for powering).
Power back-up
For the telephone service, which needs to provide an available service even in the case of a mains outage, a power
back-up unit is located either in the remote power source or in the equipment powered. The clauses 4.1 to 4.2 detail the
different installation configurations.
Location of the Telecom Equipment (TE)
On the figures 1, 2 and 3 of the following clauses, the TE in access network is schematically represented in the field.
These figures mean that the TE can be implemented in different types of locations:
• in a customer's office;
• in a building, public or private;
• in an indoor cabinet;
• in a street cabinet;
• on a pole cabinet;
• in a telecommunications manhole, etc.
The TE provides services for several customers or for one professional customer.
On figure 3, the TE can be located at customer's home and provides services for only one private customer.
Power interfaces
Six power-feeding interfaces are mentioned in the following clauses: They are as follows:
I = Power interface between a -48 V/-60 V power plant and the fed equipment in a telecom centre. It fits with the
0
interface "A" according to EN 300 132-2 [2].
I = Power interface between the public mains (commercial ac) and the fed equipment. It shall comply with the
1
voltage defined in EN 60038 [5].
I = Power interface at the output of a remote power source.
2
I = Power interface at the input of a distant power receiver interface, in remote powering.
3
I = Power interface between a local power unit and the fed equipment, in local powering. It fits with the interface
4
"A" according to EN 300 132-2 [2] or with the interface defined in clauses 6.2 to 6.4.
I = Power interface between the equipment in a telecom centre and one of the following:
5
i) the public mains (commercial ac); or
ii) emergency power (UPS, diesel generator); or
iii) interface "A" that shall comply with ETS 300 132-1 [1]; or
ETSI
---------------------- Page: 10 ----------------------
11 ETSI EN 302 099 V2.1.1 (2014-08)
iv) interface "A3" that shall comply with EN 300 132-3-1 [14]. Nominal AC voltage shall comply with the
voltage defined in EN 60038 [5].
= Power Interface from the customer. When using the telecom pair to transmit power, the voltage is 60 V DC
I
6
maximum and peaks are limited according to TR 102 614 [i.7] and EN 60950-1 [3]. Under specific
conditions ensuring proper operation, safety and reliability for POTS or DSL lines, a maximum of 120 V DC
voltage option is possible from point of connexion outside of the customer premises (same limits as for ISDN
voltage).
4.1 Remote powering
4.1.1 Centralized powering
The different power supply configurations are detailed in figure 1. The output of the power source is defined at interface
I . It comes from a TE (PW1a) or from a specific remote power unit (RPU in PW1b). Interface I corresponds to the
2 0
input of the RPU. The remote power unit consists of protection and distribution devices and, possibly, power
conversion equipment. Interface I corresponds to Interface I and is located in the telecommunication centre.
5 1
In some cases, the TE of the access network may be equipped with a battery providing additional power in periods of
heavy traffic (PW3). This battery is recharged by the remote power supply during periods of light traffic.
Customer
0
ermina
t l
2
3
TE
TE
PW1a
0
3
2
Remote
TE PW1b
Power
Unit
5
33
2
Central
TE PW2a
TE
Power
Supply
5
2
33
Remote
TE
PW2b
Power
Unit
3
2
TE
PW3
Ad
Customer's
Access network equipment
Telecommunications centre
home
Additional power source (for traffic)
Ad
Figure 1: Centralized powering
4.1.2 Cluster powering
The different possible power supply configurations are detailed in figure 2. The remote power source, called Remote
Power Unit (RPU), serves a group of distant telecommunications equipment, from 1 to n. The RPU is installed in a
location (building, outdoor cabinet, manhole, etc.) which is distinct from the TE's building, cabinet or manhole. The
telephone service is backed up by batteries located either at the remote power unit (remote powering with back-up at
source, PW4) or in the telecommunications equipment (remote powering with local back-up, PW5).
ETSI
---------------------- Page: 11 ----------------------
12 ETSI EN 302 099 V2.1.1 (2014-08)
The voltage on I and I is limited as defined in table 3 of clause 10.1.
2 3
Customer
terminal
TE
Remote
PW4
Power
Unit
Telecom-
munications
centre
TE
PW5
Remote
Power
Unit
Customer's
Access network equipment
home
Figure 2: Cluster powering
4.2 Local powering
4.2.1 TE of access network, common to several customers
The different possible local power supply configurations are detailed in figure 3. They are the following two basic
types:
) through a Local Power Unit (LPU in PW6)
- The telecommunications equipment is powered (Interface I
4
providing the functions of protection, power conversion and back-up of telephone service. It is either housed in
the telecommunications equipment rack or installed in an independent mounting, but always in the same
building or location as the TE.
- The telecommunications equipment is powered directly from the mains at Interface I (PW7). It includes
1
protection devices, power conversion equipment and back-up blocks for telephone service.
ETSI
---------------------- Page: 12 ----------------------
13 ETSI EN 302 099 V2.1.1 (2014-08)
Customer terminal
Telecom
PW6
Local
Equipment
Power
Unit
T.E. PW7
T.E.
PW8
L.P.U.
Telecom-
munications
centre
T.E.
PW9
I S/P
xDSL
6
Cu pair
POTS
PW10
POTS or ISDN
Power
S/P
P option
xDSL
PSU
AC plug
AN
PG
optical fibre
Interface "A4"
P
CPE
P - reverse powering
Interface "A"
S - standard signal interface
S/P - Signal/Power Filter
PG - Power gathering (or combining) interface
ANU
with S/P filter function
AN - Access Node (ONU or DSLAM )
ANU - Access Network Unit
Access network equipment
Customer's home
Figure 3: Local powering configurations
4.2.2 TE of access network, at customer's home
The TE is located in a customer's home and provides services for a single private customer. Two types of power feeding
are defined in local powering architecture:
• the telecommunications equipment is powered (interface I ) through a Local Power Unit (PW8) which may
4
additionally provide backup;
ETSI
Enduser Terminal
or HGW
---------------------- Page: 13 ----------------------
14 ETSI EN 302 099 V2.1.
...
Final draft ETSI EN 302 099 V2.1.0 (2014-06)
European Standard
Environmental Engineering (EE);
Powering of equipment in access network
---------------------- Page: 1 ----------------------
2 Final draft ETSI EN 302 099 V2.1.0 (2014-06)
Reference
REN/EE-02043
Keywords
access, network, power supply, remote
ETSI
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ETSI
---------------------- Page: 2 ----------------------
3 Final draft ETSI EN 302 099 V2.1.0 (2014-06)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 4
1 Scope . 5
2 References . 5
2.1 Normative references . 5
2.2 Informative references . 6
3 Definitions and abbreviations . 7
3.1 Definitions . 7
3.2 Abbreviations . 8
4 Powering configurations. 8
4.1 Remote powering . 10
4.1.1 Centralized powering . 10
4.1.2 Cluster powering . 10
4.2 Local powering . 11
4.2.1 TE of access network, common to several customers . 11
4.2.2 TE of access network, at customer's home . 12
4.2.3 TE in access network reverse powered from customer home . 13
5 Effect of the technologies on the powering strategy . 14
5.1 Powering strategy of family 1: metallic links . 15
5.2 Powering strategy of family 2: non-metallic links . 15
6 Requirements for local powering . 16
6.1 TE including the power plant . 16
6.2 TE powered by a dc voltage nominal -48 V local power unit . 16
6.3 TE powered by a LPU with a dc voltage other than -48 V . 16
6.4 TE powered by a nominal ac voltage of 230 V, 50 Hz local power unit . 16
7 Requirements for remote powering . 16
7.1 Input of the Remote Power Unit . 16
7.2 Output of the Remote Power Unit . 17
7.3 Input characteristics of remote powered receiver in the voltage mode . 17
7.4 Input characteristics of remote powered receiver in the current mode . 17
8 Power back-up . 17
9 Power management . 17
10 Safety, EMC, protection . 19
10.1 Product Safety . 19
10.2 EMC . 20
10.3 Protection/resistibility . 20
10.4 Bonding and earthing . 20
11 Environmental conditions. 21
Annex A (normative): Battery sizing . 22
A.1 Back-up power for telephone service . 22
A.2 Autonomy of the back-up . 22
A.3 Use of valve regulated lead acid battery. 23
A.4 End of service life of battery . 23
Annex B (informative): Bibliography . 24
History . 25
ETSI
---------------------- Page: 3 ----------------------
4 Final draft ETSI EN 302 099 V2.1.0 (2014-06)
Intellectual Property Rights
IPRs essential or potentially essential to the present document 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 (http://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.
Foreword
This final draft European Standard (EN) has been produced by ETSI Technical Committee Environmental Engineering
(EE), and is now submitted for the 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", "may not", "need", "need not", "will",
(Verbal forms
"will not", "can" and "cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules
for the expression of provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
---------------------- Page: 4 ----------------------
5 Final draft ETSI EN 302 099 V2.1.0 (2014-06)
1 Scope
The present document describes the principles for powering of Telecommunications Equipment (TE) in access
networks and contains requirements for the powering systems, laying down:
• the characteristics of the input and output interfaces of the power units;
• the power back-up conditions for TE including a power unit;
• the management data, necessary to guarantee the availability of the service and to ensure the maintenance of
the power units.
The present document takes into account the characteristics of access network equipment for which the limits of
responsibility in the installation or design of the power plants are very different than for equipment of telecom centre: it
goes from "complete integration of the power plant in the TE" to "remote power feeding from a distant power plant".
The present document applies to the powering of all equipment of the access network (copper, fibre or radio networks)
located outside telecommunications centres. The access network is defined as the part of the telecommunications
network, which comprises the customer terminal installation and the first exchange (switching unit). The customer
terminal and the switching unit are excluded from the application field of the present document.
The present document describes different configurations of powering the TE:
• Local power supply for TE
• Remote Feeding to TE from centre through copper access pair
• Cluster Power supply feeding power for a cluster of TE
• 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
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
reference document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://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.
2.1 Normative references
The following referenced documents are necessary for the application of the present document.
[1] ETSI ETS 300 132-1: "Equipment Engineering (EE); Power supply interface at the input to
telecommunications equipment; Part 1: Operated by alternating current (ac) derived from direct
current (dc) sources".
[2] ETSI EN 300 132-2: "Environmental Engineering (EE); Power supply interface at the input to
telecommunications and datacom (ICT) equipment; Part 2: Operated by -48 V direct current (dc)".
[3] CENELEC EN 60950-1: "Information technology equipment - Safety - Part 1: General
requirements".
[4] IEC 60950-21: "Safety of information technology equipment - Part 21: Remote power feeding".
ETSI
---------------------- Page: 5 ----------------------
6 Final draft ETSI EN 302 099 V2.1.0 (2014-06)
[5] CENELEC/IEC EN 60038: "CENELEC/IEC standard voltages".
[6] CENELEC EN 60664-1: "Insulation coordination for equipment within low-voltage systems -
Part 1: Principles, requirements and tests".
[7] CENELEC EN 50310: "Application of equipotential bonding and earthing in buildings with
information technology equipment".
[8] CENELEC EN 60896-2: "Stationary lead-acid batteries - General requirements and methods of
test - Part 2: Valve regulated types".
[9] ETSI EN 300 253: "Environmental Engineering (EE); Earthing and bonding of telecommunication
equipment in telecommunication centres".
[10] Recommendation ITU-T K.35: "Bonding configurations and earthing at remote electronic sites".
[11] CENELEC TR 62102: "Electrical safety - Classification of interfaces for equipment to be
connected to information and communications technology networks".
[12] Recommendation ITU-T K.45: "Resistibility of telecommunication equipment installed in the
access and trunk networks to overvoltages and overcurrents".
[13] ETSI ES 203 215: "Environmental Engineering (EE); Measurement Methods and Limits for Power
Consumption in Broadband Telecommunication Networks Equipment".
[14] ETSI EN 300 132-3-1: "Environmental Engineering (EE); Power supply interface at the input to
telecommunications and datacom (ICT) equipment; Part 3: Operated by rectified current source,
alternating current source or direct current source up to 400 V; Sub-part 1: Direct current source
up to 400 V".
[15] 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".
2.2 Informative references
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 weatherprotected 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-weatherprotected 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] ETSI TR 102 629: "Access, Terminals, Transmission and Multiplexing (ATTM); Reverse Power
Feed for Remote Nodes".
[i.6] ETSI EN 301 605: "Environmental Engineering (EE); Earthing and bonding of 400 VDC data and
telecom (ICT) equipment".
[i.7] ETSI TR 102 614: "Environmental Engineering (EE); Reverse powering of access network unit by
end-user equipment: A4 interface".
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7 Final draft ETSI EN 302 099 V2.1.0 (2014-06)
[i.8] CENELEC HD 60364-1: "Low-voltage electrical installations - Part 1: Fundamental principles,
assessment of general characteristics, definitions".
[i.9] ETSI EN 302 999: "Safety; Remote Power Feeding Installations; Safety requirements for the
erection and operation of information technology installations with remote power feeding".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document the following terms and definitions apply:
access network: part of a telecommunications network between the customer terminal installation 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
distant power receiver: power equipment electrically connected to a Remote Power Unit
NOTE: Its function is to supply telecommunications equipment situated at the same location. It may be combined
with the item of telecommunications equipment itself.
hazardous voltage: See EN 60950-1 [3].
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 EN 60950-1 [3].
Remote Feeding Telecommunication (RFT) circuit: secondary circuit within the equipment, intended to supply or
receive dc power via a telecommunication network at voltages equal to or exceeding the limits for TNV circuits, and on
which overvoltages from telecommunication networks are possible
Remote Power Unit (RPU): power unit, connected to the mains or from a centralized power plant, which supplies
distant telecommunications equipment
remote powering: power feeding of a telecommunications equipment by a remote power circuit
NOTE: Such a circuit consists of a remote power unit, distribution wiring, and fed receivers.
RFT-C circuit: RFT circuit which is so designed and protected that under normal operating conditions and single fault
conditions the currents in the circuit do not exceed defined values
RFT-V circuit: RFT circuit which is so designed and protected that under normal operating conditions and single fault
conditions the voltages are limited and the accessible area of contact is limited
secondary circuit: See EN 60950-1 [3].
SELV circuit: See EN 60950-1 [3].
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8 Final draft ETSI EN 302 099 V2.1.0 (2014-06)
TN-C: See CENELEC HD 60364-1 [i.8].
TN-S: See CENELEC HD 60364-1 [i.8].
TNV circuit: See EN 60950-1 [3].
TT: See CENELEC HD 60364-1 [i.8].
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ac alternating current
AN Access Node
ANU Access Network Unit
CH Customer's Home
CPE Customer's Premises Equipment
dc direct current
DC/DC Direct Current/Direct Current
DSL Digital Subscriber Line
EMC ElectroMagnetic Compatibility
FTTB Fibre To The Building
FTTC Fibre To The Curb
FTTCab Fibre To The Cabinet
FTTDp Fibre To The Distribution point
FTTH Fibre To The Home
HD Harmonization Document
ICT Information & Communication Technology
IEC International Electrical Committee
ISDN Integrated Services Digital Network
IT Information Technology
ITU-T International Telecommunication Union - Sector Telecommunication (T)
LED Light Emitting Diode
LPU Local Power Unit
ONT Optical Network Termination
ONU Optical Network Unit
P Power
PG Power Gathering
PW Power Way
RFT Remote Feeding Telecommunication
RFT-C Remote Feeding Telecommunication-Current
RFT-V Remote Feeding Telecommunication-Voltage
RPU Remote Power Unit
S Signal
S/P filter separating signal S and power P
filter
SELV Safety Extra Low Voltage
TC Telecommunication's Centre
TE Telecom Equipment
TNV Telecommunication Network Voltage
UPS Uninterruptible Power Supply
4 Powering configurations
The main characteristic feature of the different powering architectures of access network equipment is the location of
the following two functions:
• the point of connection to the mains; and
• the place of power back-up.
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9 Final draft ETSI EN 302 099 V2.1.0 (2014-06)
The total network can be divided in three main parts:
1) the Telecommunication Centre (TC);
2) the field (the undefined area between the Telecom Centre and the Customer's Home);
3) the Customer's Home (CH).
Powering architectures
Equipment of access networks can be powered remotely from a telecommunications centre (centralized powering) or
from a power supply node (cluster powering), or locally from the mains (local powering). Inside these three main
powering architectures, several configurations of powering are used. They are summarized in the clauses 4.1 to 4.2 and
in the figures 1, 2 and 3 by the acronyms PW1 to PW 10 (for powering).
Power back-up
For the telephone service, which needs to provide an available service even in the case of a mains outage, a power
back-up unit is located either in the remote power source or in the equipment powered. The clauses 4.1 to 4.2 detail the
different installation configurations.
Location of the Telecom Equipment (TE)
On the figures 1, 2 and 3 of the following clauses, the TE in access network is schematically represented in the field.
These figures mean that the TE can be implemented in different types of locations:
• in a customer's office;
• in a building, public or private;
• in an indoor cabinet;
• in a street cabinet;
• on a pole cabinet;
• in a telecommunications manhole, etc.
The TE provides services for several customers or for one professional customer.
On figure 3, the TE can be located at customer's home and provides services for only one private customer.
Power interfaces
Six power-feeding interfaces are mentioned in the following clauses: They are as follows:
I = Power interface between a -48 V/-60 V power plant and the fed equipment in a telecom centre. It fits with the
0
interface "A" according to EN 300 132-2 [2].
I = Power interface between the public mains (commercial ac) and the fed equipment. It shall comply with the
1
voltage defined in EN 60038 [5].
I = Power interface at the output of a remote power source.
2
I = Power interface at the input of a distant power receiver interface, in remote powering.
3
I = Power interface between a local power unit and the fed equipment, in local powering. It fits with the interface
4
"A" according to EN 300 132-2 [2] or with the interface defined in clauses 6.2 to 6.4.
I = Power interface between the equipment in a telecom centre and one of the following:
5
i) the public mains (commercial ac); or
ii) emergency power (UPS, diesel generator); or
iii) interface "A" that shall comply with ETS 300 132-1 [1]; or
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10 Final draft ETSI EN 302 099 V2.1.0 (2014-06)
iv) interface "A3" that shall comply with EN 300 132-3-1 [14]. Nominal AC voltage shall comply with the
voltage defined in EN 60038 [5].
= Power Interface from the customer. When using the telecom pair to transmit power, the voltage is 60 V DC
I
6
maximum and peaks are limited according to TR 102 614 [i.7] and EN 60950-1 [3]. Under specific
conditions ensuring proper operation, safety and reliability for POTS or DSL lines, a maximum of 120 V DC
voltage option is possible from point of connexion outside of the customer premises (same limits as for ISDN
voltage).
4.1 Remote powering
4.1.1 Centralized powering
The different power supply configurations are detailed in figure 1. The output of the power source is defined at interface
I . It comes from a TE (PW1a) or from a specific remote power unit (RPU in PW1b). Interface I corresponds to the
2 0
input of the RPU. The remote power unit consists of protection and distribution devices and, possibly, power
conversion equipment. Interface I corresponds to Interface I and is located in the telecommunication centre.
5 1
In some cases, the TE of the access network may be equipped with a battery providing additional power in periods of
heavy traffic (PW3). This battery is recharged by the remote power supply during periods of light traffic.
Customer
0
ermina
t l
2
3
TE
TE
PW1a
0
3
2
Remote
TE PW1b
Power
Unit
5
33
2
Central
TE PW2a
TE
Power
Supply
5
2
33
Remote
TE
PW2b
Power
Unit
3
2
TE
PW3
Ad
Customer's
Access network equipment
Telecommunications centre
home
Additional power source (for traffic)
Ad
Figure 1: Centralized powering
4.1.2 Cluster powering
The different possible power supply configurations are detailed in figure 2. The remote power source, called Remote
Power Unit (RPU), serves a group of distant telecommunications equipment, from 1 to n. The RPU is installed in a
location (building, outdoor cabinet, manhole, etc.) which is distinct from the TE's building, cabinet or manhole. The
telephone service is backed up by batteries located either at the remote power unit (remote powering with back-up at
source, PW4) or in the telecommunications equipment (remote powering with local back-up, PW5).
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11 Final draft ETSI EN 302 099 V2.1.0 (2014-06)
The voltage on I and I is limited as defined in table 3 of clause 10.1.
2 3
Customer
terminal
TE
Remote
PW4
Power
Unit
Telecom-
munications
centre
TE
PW5
Remote
Power
Unit
Customer's
Access network equipment
home
Figure 2: Cluster powering
4.2 Local powering
4.2.1 TE of access network, common to several customers
The different possible local power supply configurations are detailed in figure 3. They are the following two basic
types:
) through a Local Power Unit (LPU in PW6)
- The telecommunications equipment is powered (Interface I
4
providing the functions of protection, power conversion and back-up of telephone service. It is either housed in
the telecommunications equipment rack or installed in an independent mounting, but always in the same
building or location as the TE.
- The telecommunications equipment is powered directly from the mains at Interface I (PW7). It includes
1
protection devices, power conversion equipment and back-up blocks for telephone service.
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12 Final draft ETSI EN 302 099 V2.1.0 (2014-06)
Customer terminal
Telecom
PW6
Local
Equipment
Power
Unit
T.E. PW7
T.E.
PW8
L.P.U.
Telecom-
munications
centre
T.E.
PW9
I S/P
xDSL
6
Cu pair
POTS
PW10
POTS or ISDN
Power
S/P
P option
xDSL
PSU
AC plug
AN
PG
optical fibre
Interface "A4"
P
CPE
P - reverse powering
Interface "A"
S - standard signal interface
S/P - Signal/Power Filter
PG - Power gathering (or combining) interface
ANU
with S/P filter function
AN - Access Node (ONU or DSLAM )
ANU - Access Network Unit
Access network equipment
Customer's home
Figure 3: Local powering configurations
4.2.2 TE of access network, at customer's home
The TE is located in a customer's home and provides services for a single private customer. Two types of power feeding
are defined in local powering architecture:
• the telecommunications equipment is powered (interface I ) through a Local Power Unit (PW8) which may
4
additionally provide bac
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