TXC-04222-AIOG Transwitch Corporation, TXC-04222-AIOG Datasheet - Page 4

• Manufacturer Part Number: TXC-04222-AIOG
• Manufacturer: Transwitch Corporation

Specifications of TXC-04222-AIOG

• Screening Level: Industrial
• Package Type: BGA
• Lead Free Status / Rohs Status: Not Compliant

June 2003
TEMx28
TXC-04222
TXC-04222-MB, Ed. 6
OVERVIEW
The TEMx28 device is designed for add/drop multiplexer, terminal multiplexer, and dual and single unidirec-
tional 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-par-
allel SDH/SONET-formatted bus at the 19.44 Mbyte/s byte rate. The E1 and DS1 signals can be HDB3 or
B8ZS/AMI positive/negative rail (dual unipolar) signals, or NRZ signals. The VT/TU interface can be provided
with or without the overhead bytes for virtual concatenation applications. The TEMx28 performs pointer track-
ing and overhead byte processing, including single-bit or three-bit RDI operation, and optional tandem connec-
tion capability. All overhead bytes, including the V1/V2/V4 bytes, are provided for microprocessor access.
The TEMx28 can generate receive and transmit line AIS, transmit unequipped and supervisory unequipped
channels, and transmit VT/TU AIS, in addition to standards-compliant overhead byte monitoring.
For testing, the device provides IEEE 1149.1 boundary scan, a PRBS generator and analyzer, and both line
and facility loopbacks. The TEMx28 supports split bus access for either Intel or Motorola microprocessors. Its
performance counters can be configured to be either saturating or roll over. Interrupts can be generated by
alarms that latch on positive, negative, or both positive and negative status transitions, and they can be dis-
abled via mask bits. A software polling register and summary alarm bit status are also provided. One second
measurements are performed for alarms and counters.
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