Generic Requirements for Powering Telecommunications Load Equipment (TLE) in Telecommunications Systems
Document Number GR-1500
Issue Number 01
Issue Date Oct 2005
Replaces TA-NWT-001500 Issue01
Components of this product are:
ABSTRACT: This document replaces TA-NWT-001500.
This Generic Requirements document (GR) presents the Telcordia view of proposed generic requirements for systems that may be used to
power telecommunications load equipment (TLE) located in Central Office, remote site and customer premises under the exclusive control
of telecommunications service providers. Such powering systems would provide power to Optical Network Units (ONUs) and Optical Network
Terminations (ONTs) providing services in Fiber-In-The-Loop (FITL) systems as defined in GR-909, Generic Criteria for Fiber In
The Loop Systems. Two types of powering are covered in this GR, centralized and local.
In centralized powering, power and backup power are supplied from a source separate from the telecommunications load equipment
(TLE). The facility may be in the Central Office (CO) or remote site, or may be in a dedicated power source. In local powering, power
and reserve power are derived near the end of the loop in proximity to the TLE that may be located at a remote site or customer
premise. These systems are expected to be able to furnish power and backup power to TLE in the distribution loop whether they are
powered from centralized power systems (e.g., power sources or nodes in the distribution loop) or locally from individual or shared
The GR provides a comprehensive set of requirements for different options for power systems that can be used to power
telecommunications load equipment (TLE) such as ONUs, ONTs and HDSLs. In addition, the GR addresses recent advances in remote powering
by establishing the appropriate requirements for "paralleling powering" and local powering at customer premises.
This GR is the only document in the industry that provides explicit requirements for centralized and local powering. In addition,
this GR resolves many design and codes issues raised in the industry for the "paralleling powering". The GR provides guidance to
manufacturers on designing reliably the powering system and provides confidence to service providers that the powering system can
reliably be used in their network. The GR would provide significant cost reduction to manufacturers as well as service providers that
can use this GR for buying their products.
Issue 1 of GR-1500 adds criteria for parallel powering architecture, and criteria for providing local powering at customer premises.
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