IEC 63316 Ed. 1.0 en:2026

Full Description

IEC 63316:2026 prescribes safeguards, test methods and compliance requirements intended to
reduce the risk of electrical shock and fire associated with voltage and current at voltages
greater than 60 V DC and 60 V AC.
This document 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) (3.1.2) to a powered device (PD) (3.1.3), 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 (3.1.2) and PD (3.1.3).
The power transfer of equipment ports covered by this document uses non-mains AC voltage
or non-mains DC voltage above 60 V DC classified as ES2 according to 5.2.1.2 of
IEC 62368-1:2023 or, in some very controlled cases, classified as ES3 according to
IEC 62368-1:2023.
EXAMPLES
− DC power transfer using voltages above 60 V DC but ≤ 120 V DC, classified as ES2;
− Some telecommunications networks where the voltage was formerly called TNV-3 (see IEC 62368-1:2023,
Table W.3), typically used for line, span or 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 (3.1.2) and
service providers side of the PD (3.1.3) at the PNI (3.1.8);
− 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 or line powering down converters as applicable), Optical Network Units,
remote DSLAMs, etc. These RFT circuits are used between the utility service providers PSE (3.1.2) and
service providers side of the PD (3.1.3) at the PNI (3.1.8). The customer facing ports of this equipment are at
voltage not exceeding 60 V DC and are covered by IEC 62368-1:2023, 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 at voltage not exceeding 60 V DC that are covered by IEC 62368-1:2023.
NOTE 1 Any communications cable that permits power transfer between communication equipment is considered a
communication cable even if communication does not take place. For example, a line powering up or line powering
down converters as applicable used to power remote telecommunications equipment, can provide limited
communications RFT power and not necessarily any superimposed data or signalling.
This document does not cover equipment interfaces within the scope of IEC 63315.
NOTE 2 IEC 63315 covers equipment intended to either supply or receive charging, or operating power from ICT
interfaces using ICT wires and cables such as PoE, USB, HDMI, etc, or any of these combined.
This document does not cover ringing signals that are in the scope of IEC 62368-1 or in the
scope of IEC 62949:2017.
This document does not cover traditional telecommunications technologies which operate at
voltages not exceeding 60 V DC (circuits classified as ES1 according to 5.2.1.1 of
IEC 62368-1:2023 and Table ID1a, 1b, or 1c in Table 13 of IEC 62368-1:2023) with or without
ringing signals (classified as ES2 according to 5.2.1.1 of IEC 62368-1:2023 and external circuit
ID1a, 1b, or 1c in Table 13 of IEC 62368-1:2023). Examples of traditional telecommunications
technologies include Analogue Telephony, ISDN, T1, E1, VDSL, SHDSL, DDS, etc.
This document does not cover communications over mains and high-voltage power
transmission and distribution lines.