NEBS Requirements: Physical Protection
Document Number GR-63
Issue Number 04
Issue Date Apr 2012
Replaces TR-NWT-000063 Issue05
ABSTRACT: This Generic Requirements document (GR) presents minimum spatial and environmental criteria for all new telecommunications equipment
used in Central Offices (COs) and other environmentally controlled telephone equipment spaces. These criteria were developed jointly by
Telcordia and industry representatives. They are applicable to switching and transport systems, associated Cable Distribution Systems
(CDSs), Distributing and Interconnecting Frames (DFs and IFs), power equipment, operations support systems, and Cable Entrance
Facilities (CEFs). Compliance with these requirements may increase network robustness, simplify equipment installation, and promote
the economical planning, engineering and operation of equipment spaces.
Telecommunications equipment, by nature of its physical installation in a building, may be exposed to environmental stresses. The
generic criteria presented in this document are intended to help avoid equipment damage and malfunction caused by such things as
extreme temperature and humidity, vibrations, airborne contaminants, minimize fire ignitions and fire spread, as well as provide for
improved space planning, simplified equipment installation, and increased energy efficiency.
This document provides only those requirements related to the physical aspects of equipment-building interfaces, including physical
dimensions and environmental performance criteria. Additional design requirements, including functional, electrical, and reliability
requirements, may be found in other requirements documents.
Issue 4 of GR-63 includes the following updated information:
- Criteria for equipment cooling air-inlet and exhaust locations are revised and clarified.
- Operating temperature test conditions are now a function of the equipment-cooling air-inlet location.
- A detailed heat dissipation calculation procedure is provided for frame and shelf-level equipment.
- Fire resistance test methods are updated to address specific service provider requirements.
- Unpackaged shock-testing levels for field-replaceable units and smaller chassis are more closely aligned with other standards and
the expected levels encountered during installation.
- The Office Vibration test now includes an option for a random vibration method that is aligned with other standards.
GR-63, Issue 4 is a companion document to GR-1089, Electromagnetic Compatibility (EMC) and Electrical Safety - Generic Criteria
for Network Telecommunications Equipment. SR-3580, NEBS Criterial Levels, contains the criteria levels for both
FD-NEBS-01, NEBS Physical and Electrical Protection , contains all three documents and is priced at a 30% discount over
the individual documents.
This CD also includes a free Roadmap to NEBS guide, that lists and describes all NEBS-related documents, and the NEBS program.
Issue 4 of GR-63, NEBS Requirements: Physical Protection, replaces Issue 3, and is module of FD-NEBS-01.
GR-63 replaces TA-NWT-000063, TR-NWT-000063, TR-EOP-000063, TA-NPL-000286, TA-EOP-000286, TR-TSY-000514, and PUB-51001.
When using GR-63, you may need to refer to GR-1089, GR-3160 and certain ANSI, ASTM, CSA, IEC, IEEE, ISO, and UL standards
and publications. You may also want to refer to GR-78, GR-357,GR-2930, GR-3028, GR-3108, GR-487, GR-1274,
GR-78, and SR-3580.
Components of this product are:
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