Generic Requirements for Fiber Distribution Hubs (FDHs)
Document Number GR-3125
Issue Number 02
Issue Date Dec 2016
Replaces GR-3123-CORE Issue01
GR-3125 outlines the Telcordia-NIS view of proposed generic requirements for Fiber Distribution Hubs (FDHs). The stated requirements
are intended to provide a suitable environment for telecommunications companies┐ FDHs used in outside plant (outdoor or below-grade) or
Any equipment housed in an FDH is accessible to the craftsperson through surface-mounted or removable doors. An FDH is normally
installed as a connection and demarcation point from different feeder networks, or between a feeder network and the distribution
network. These FDHs are passive and do not contain active electronics or fiber optics.
For indoor environments, an FDH can be installed on a customer premise in a basement or ┐telephone room┐ or in a service provider
Controlled Environmental Vault (CEV).
Indoor FDH products were previously covered in GR-3123-CORE, Generic Requirements for Indoor Fiber Distribution Hubs (FDHs),
and below-ground FDH products were previously covered in GR-3121-CORE, Generic Requirements for Below-Grade Fiber Distribution Hubs
(FDHs). The requirements in those GRs have now been incorporated into this GR-3125, and GR-3121 and GR-3123 have been cancelled.
GR-3125, Issue 2, was developed to include updated FDH requirements from the following documents:
- GR-487, Generic Requirements for Electronic Equipment Cabinets, Issue 5, March 2016
- GR-771-CORE, Generic Requirements for Fiber Optic Splice Closures, Issue 2, July 2008
- GR-449-CORE, Generic Requirements and Design Considerations for Fiber Distributing Frames, Issue 3, March 2012.
This document is intended for the use of manufacturers and end users of outdoor, indoor, and below-grade FDHs.
When using GR-3125, you may want to refer to GR-449, GR-487, and GR-771.
GR-3125-CORE, Issue 2, replaces GR-3125-CORE, Issue 1; GR-3121-CORE, Issue 1; and GR-3123-CORE, Issue 1.
Components of this product are:
Table of Contents:
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