Technical Specifications
Issue 8.0 July 2002
10-49
* Based on Method 1 of the Telcordia, Reliability Prediction Procedure for Electronic Equipment, Issue
5, December 1995.
†Assuming one fiber failure event every 3 years, and an average fiber repair time of 3 hours.
‡ Based on the AT&T Reliability Information Notebook, 7th Edition, August 1995.
External Synchronization Cabling
— to a DSX-1 cross-connect panel 655 feet maximum
— to other sources 1310 feet maximum
DS1 Synchronization Inputs
— Source Two references; must be derived from a
stratum 3 or better timing source
— Line Coding AMI (original value) or B8ZS
— Frame Format SF (original value) or ESF
— Connector DB9
— Protection Switching.....................
Between References
Revertive,AutomaticonLOS,AIS,LOF,OOF,
or BER
DS1 Synchronization Outputs
— Source Two references; derived directly from the
OC-48 line
Point-to-Point Reference 1 derived from Service Line;
Reference 2 derived from Protection Line
Rings Reference 1 derived from West Direction;
Reference 2 derived from East Direction
— Frame Format SF or ESF
— DS1 AIS inserted if reference becomes unsuitable
— Connector DB9
— LBO CIT provisionable
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