ZL30138

The ZL30138 SONET/SDH/Ethernet Stratum 2/3E/3 System Synchronizer and SETS device is a highly integrated device that provides all of the functionality that is required for a central timing card in carrier grade network equipment. The basic functions of a central timing card include:

• Input reference monitoring for both frequency accuracy and phase irregularities

• Automatic input reference selection

• Support of both external timing and line timing modes

• Hitless reference switching

• Wander and jitter filtering

• Optional Input phase transient filtering (Stratum 3E phase build-out)

• Master/slave crossover for minimizing phase alignment between redundant timing cards

• Independent derived output timing path for support of the SETS functionality

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