TXC-04251 Overview
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 multiple-segment, byte-parallel SONET/SDH-formatted bus at the 19.44 Mbit/s byte rate for STS-3/STM-1 operation or at the...
TXC-04251 Key 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 provide
- 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 Errors (FEBEs)
- VT/TUs are monitored for Loss Of Pointer, New Data Flags (NDFs), AIS, Remote Defect Indication (RDI), and size errors (S
- V5 Byte Signal Label Mismatch and Unequipped detection
- T1 facility and line loopbacks, generation of BIP-2 and FEBE errors, and send RDI capability
- Multiplexed microprocessor bus interface with interrupt capability
TXC-04251 Applications
- STS-1/STS-3/STM-1 to 1.544 Mbit/s add/drop mux/demux