TXC-04222 Datasheet | Transwitch

TEMx28 Device 28 Channel Dual Bus High Density Mapper TXC-04222 DATA SHEET Features - Add/drop up to 28 E1, DS1, or VT/TU payloads from two add and two drop STM-1/VC4, STS-3 buses - Add bus and drop bus timing modes - Cross mapping applications (DS1 mapped to/from VT2/TU-12s) - Selectable HDB3/B8ZS/AMI positive/negative rail, NRZ, or VT/TU interfaces per channel - H4 multiframe option in place of Tele Bus V1 pulse - Digital desynchronizer - Drop buses are monitored for parity, loss of clock, and upstream AIS - Performance counters for pointer movements, BIP-2 errors, REI and coding violations - Single-bit or three-bit RDI operation per channel - Tandem connection capability per ETSI standards - J2 trail trace parison option - Processor access to H1/H2, H4 overhead bytes, and V1/V2 and V4 bytes - Selectable positive, negative or positive/negative alarm transition interrupt options - Line and facility loopbacks, generation of BIP-2 and REI errors, PRBS generator and analyzer per channel - Polling registers and global summary alarm status - One second measurements: counters and alarms - Software device driver is provided - IEEE 1149.1 standard boundary scan - +3.3 V and 1.8 V power supplies, 5 V tolerant I/O leads - 376-lead plastic ball grid array (PBGA) package (23 mm x 23 mm) DESCRIPTION The TEMx28 device is designed for add/drop multiplexer, terminal multiplexer, and dual and single unidirectional ring applications. Up to 28 E1, DS1, or VT/TU payloads are mapped to and from VT1.5/TU-11s and VT2/TU-12s carried in an STM-1 VC-4 or STS-3 format. The device interfaces to a multiple-segment, byte-parallel SDH/SONET-formatted bus at the 19.44 Mbyte/s byte rate. The E1 and DS1 signals can be HDB3 or B8ZS/AMI rail signals, or NRZ signals. The VT/TU interface can be...