MT9046 holdover equivalent, t1/e1 system synchronizer with holdover.
* Supports AT&T TR62411 and Bellcore GR-1244CORE, Stratum 4 Enhanced and Stratum 4 timing for DS1 interfaces Supports ETSI ETS 300 011, TBR 4, TBR 12 and TBR 13 timin.
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* Synchronization and timing control for Customer Premises Equipment (CPE) ST-BUS clock and frame pulse source.
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