TXC04251 QT1M Device Quad T1 Mapper

TXC04251 QT1M Device Quad T1 Mapper

The Quad T1 Mapper device is designed for add/drop multiplexer, terminal multiplexer, and dual and single unidirectional ring applications. Four T1 1.544 Mbit/s signals are mapped to and from asynchronous 1.5 Virtual Tributaries (VT1.5s) or Tributary Unit-11s (TU-11s). The QT1M interfaces to a multi.

Features

• Add/drop four 1.544 Mbit/s signals from an STS-1, an STS-3/AU-3, or an STM-1 VC-4
• Independent add and drop bus timing modes
• Selectable AMI or B8ZS positive/negative rail or NRZ T1 interface. Performance counter provided for coding violations
• Digital desynchronizer reduces systemic jitter in the presence of multiple pointer movements. A register is also provided to control the internal FIFO leak rate
• Drop buses are monitored for parity, loss of clock, upstream AIS and H4 multiframe errors
• Performance counters are provided for VT/TU pointer movements, BIP-2 errors and Far End Block E.