This standard applies to equipment ports intended to supply and receive operating power from communications equipment ports using communication wires and cables. It covers particular requirements for circuits that are designed to transfer AC or DC power from a power sourcing equipment (PSE) to a powered device (PD), including repeaters, amplifiers, Optical Network Units, Remote DSLAMS, service provider terminating equipment, remote telecommunications cabinets and equipment, and midspan passive equipment connected to the PSE and PD.
The power transfer of equipment ports covered by this standard uses non-mains AC voltages or DC voltages ≥ 60 V DC classified as ES2 as defined in IEC 62368-1:2018 or, in some very controlled cases, classified as ES3 as defined in IEC 62368-1:2018 .
EXAMPLES
- DC power transfer using voltages ≥ 60 V DC but ≤ 120 V DC, classified as ES2;
- Some telecommunications networks where the voltage was formerly called TNV-3 (see IEC 62368-1:2018, Table W.3), typically used for line/span/express powering outside North America, Long Range Reverse Power Feeding, HDSLx line powering ISDN, Line Powering Primary Rate E1.
- Some North American telecommunications networks between the utility service providers´ PSE and service providers side of the PD at the PNI.
- For DC power transfer using voltages ≥ 120 V DC at ES3: RFT circuits and the associated telecommunications network equipment and cabling used by communications service providers and communications utilities (for example, line powered E1/T1, HDSLx, SHDSLx, xDSL, repeaters, and telecommunications line powering up/down converters), Optical Network Units, remote DSLAMS, etc. These RFT circuits are used between the utility service providers PSE and service providers side of the PD at the PNI. The customer facing ports of this equipment are ≤ 60 V DC that are covered by IEC 62368-1:2018, see Annex A for deployment topologies.
- For AC/DC remote powering voltage above ES1 over coaxial cable in circuits used by cable television utility service providers for repeaters, amplifiers, Optical Network Units. The customer facing ports of this equipment are ≤ 60 V DC that are covered by IEC 62368-1:2018.
NOTE 1 Any communications cable that permits power transfer between communications equipment is considered a communication cable even if communication does not take place. For example, a line-powering upconverter/downconverter used to power remote telecommunications equipment, may just provide limited communications RFT power and not necessarily any superimposed data or signalling.
This standard does not cover equipment ports within the scope of IEC 63315, which covers equipment intended to supply and/or receive charging and/or operating power from ICT ports such as PoE, USB, HDMI, audio/visual, etc. This standard does not cover ringing signals that are in the scope of IEC 62949:2017.
This standard does not cover traditional telecommunications technologies which operate at ≤ 60 V DC (circuits classified as ES1 and Table ID1 in IEC 62368-1:2018) with or without ringing signals (classified as ES2 and external port ID1 in IEC 62368-1:2018) as those are adequately covered in IEC 62368-1:2018. Examples include Analogue Telephony, ISDN, T1, E1, VDSL, SHDSL, DDS, etc.
NOTE 2 Communications over mains and high-voltage power transmission and distribution lines are beyond the scope of this standard.
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