| 摘要 |
Synchronization and desynchronization of a data signal transported in a synchronous frame across a synchronous communications network, such as SONET/SDH, reduces waiting-time jitter. A timing estimate (F) indicative of a relationship between a data rate (f 1 ) of the data signal and a reference frequency (f 2 ) of the synchronous communications network is calculated and communicated through the synchronous communications network, for example in the Synchronous Payload Envelope of a SONET frame. The data signal is recovered using a desynchronizer Phase-Locked Loop steered by the timing estimate (F). The timing estimate (F) can be any one or more of: a ratio between the data rate (f 1 ) and the reference frequency (f 2 ); a difference between the data rate (f 1 ) and the reference frequency (f 2 ); and a phase difference between a recovered data clock signal associated with the data rate (f 1 ) and a reference clock signal associated with the reference frequency (f 2 ).
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