Network Element Time-of-Day Time Transfer, Coordination and Synchronization Generic Requirements
Document Number GR-2861
Issue Number 01
Issue Date Oct 1994
ABSTRACT: This document presents the view of Telcordia generic requirements for continuous acquisition of Time-Of-Day relying on modern NAVSTAR
Global Positioning System (GPS) technology along with standard Time Code Distribution interfaces and industry-accepted Time Transfer
Protocols for synchronization with other Network Elements, Operations Systems, and local supervisory systems. Participating Network
Elements (NEs) and corresponding management systems are expected to be accurately coordinated or synchronized to better than 1/2-second
traceable to Coordinated Universal Time (UTC).
The model architecture consists of low-cost GPS receivers located in Central Offices that continuously derive and supply Time-Of-Day
to a distribution device that, in turn, supports connections to NEs and local computer systems equipped to meet the interface.
Alternative Time Transfer Protocols are available to share and synchronize Time-Of-Day among local or remote entities not equipped to
accept Time Codes.
When using GR-2861, you may need to refer to GR-63, GR-454, and GR-839. You may also want to refer to GR-78,
GR-357, GR-378, GR-418, GR-487, GR-499, GR-831, GR-833, GR-1089, GR-1093, GR-1252, and/or
Components of this product are:
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