t1/e1 system synchronizer with stratum 3 holdover.
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* Supports Telcordia GR-1244-CORE Stratum 4 timing for DS1 interfaces Supports ETSI ETS 300 011, TBR 4, TBR 12 and TBR 13 timing for E1 interfaces S.
* Synchronization and timing control for multitrunk T1,E1 and STS-3/OC3 systems ST-BUS clock and frame pulse sources.
The ZL30409 T1/E1 System Synchronizer contains a digital phase-locked loop (DPLL), which provides timing and synchronization signals for multitrunk T1 and E1 primary rate transmission links. The ZL30409 generates ST-BUS clock and framing signals that.
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