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 GR-2830.