Standards Development

Scope

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,, and midspan passive equipment connected to the PSE and PD.

The power transfer uses AC voltages or DC voltages ≥60 Vd.c. classified as ES2 or in some very controlled cases at ES3.

EXAMPLES

– For DC power transfer using voltages ≥60 Vd.c.but ≤120 Vd.c classified as ES2:

– Some telecommunications networks where the voltage was formerly called TNV3. Typically used for line/span/express powering outside North America for 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 Vd.c 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 Vd.c. which are covered by IEC 62368-1. See Annex A for deployment topologies.

– For AC/DC Power transfer of High Voltage Coax power circuits used by Cable TV utility service providers for repeaters, amplifiers, Optical Network Units. The customer facing ports of this equipment are ≤60 Vd.c. which are covered by IEC 62368-1

– For AC (RFT) power transfer at greater than ES1

– For power transfer over high voltage power lines

– For power transfer using Pulsed or digital Electricity

NOTE Any communications cable that permits power transfer between communications equipment (that is not Mains) 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 traditional telecommunications technologies which operate at ≤ 60 Vd.c. (classified as ES1 and external port ID1 in IEC 62368-1) with or without ringing signals (classified as ES2 and external port ID1 in IEC 62368-1) as those are adequately covered in IEC 62368-1 Examples include Analogue Telephony, ISDN, T1, E1, VDSL, SHDSL, DDS, etc.

This standard does not cover equipment ports within the scope of IEC xxxxx (new standard covering IEC 62368-3 section 5 and other similar technologies, yet to be named), which include PoE, USB, HDMI, audio/visual, etc.

Purpose

This standard is intended to be a horizontal standard to be used with IEC 62368-1 and other safety standards covering equipment that has ICT interfaces that provide power at > 60 Vdc. It is intended to replace IEC 62368-3 Section 6 as well as add additional sections for high voltage coax, and several other technologies.