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ANSI T1.101-1999

Synchronization Interface Standard

This revised standard describes synchronization interfaces for the North American digital telecommunications hierarchy. Compliance with this standard is necessary to achieve satisfactory interworking of telecommunications networks. This revision of the standard includes requirements on essential timing characteristics at synchronization interfaces. It adds the use of OC-N signals at synchronization interfaces and the use of the time variance as a metric for short-term stability. This standard defines the interface signal and is not intended to be an equipment specification.

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