Summary

The VTXP-6 is a highly integrated, versatile device that provides low-order TU-11/TU-12/VT1.5/VT2/TU-3 and high-order VC-4/VC-3/STS-3c/STS-1 processing, re-timing, performance monitoring and cross-connect for SDH/SONET STM-1/STS-3 rates. On the line side, the device provides a single standard byte wide 77.76 MHz TelecomBus or two standard byte wide 19.44 MHz TelecomBus interfaces. The device supports Drop and Add bus timing modes using four standard byte wide 19.44 MHz TelecomBus interfaces. In the receive direction, performance monitoring for VC-3 paths is performned and high-order VC-4/VC-3/STS-1 terminated paths are processed for low-order pointer processing, or cross-connected for pass-through (continue) or drop mode. Low-order traffic is process and re-timed based on single reference on output TelecomBus. Extensive low-order performance monitoring is integrated requiring no additional external components, for SNCP / UPSR support at high or low-order traffic. The device implements strictly non-blocking cross-connect with multicast between the two line and add/drop interfaces for any legal mix of TU-11/TU-12/TU-3/ VT1.5/VT2 or VC-4/VC-3/STS-1 traffic. A fully functional Device Driver is available through TranSwitch Applications Engineering.

APPLICATIONS

• SDH/SONET add/drop and terminal multiplexers
  
• SDH/SONET Digital Cross-Connects with VC-4/VC-3/STS-1 and TU-11/TU-12/TU-3/VT1.5/VT2 granularity
  
• Metro and access SDH/SONET systems
  
• Subtended low-order switching applications
  
• Low-order pointer processing applications
  
• Head and ring closure for SDH/SONET systems
  

Features

• Provides STM-1 / STS-3 ring closure, pointer processing and re-timing for any legal mix of TU-11/TU-12/TU-3/ VT1.5/VT2 tributaries or VC-4/VC-3/STS-1 paths, including the VC-3 / TU-3 / TUG-3 mapping
• Independently configurable add and drop standard byte wide interfaces operating in 19.44 MHz mode
• Supports two line ports using the standard byte wide 19.44 MHz TelecomBus, or a single byte wide 77.76 MHz TelecomBus line port
• Industrial temperature range (-40oC to +85oC)
• Power Supply 1.8V, 3.3V. Package Type 376-lead plastic Ball Grid Array package (PBGA), 23 x 23 mm
• Boundary scan and loopbacks
• Per tributary performance monitoring functions include:
  • Loss of pointer and AIS detection
  • J1 trace identification mismatch, C2 PLM / UNEQ, RDI / ERDI detection (VC-3 traffic)
  • B3 error counting for signal degrade / signal fail conditions
  • V5 RDI/ERDI and REI counters
  • BIP-2 error counting for signal degrade / signal fail conditions
  • UNEQ-V and AIS-V detection and insertion
  • J2 trace identifier mismatch
• Integrated internal non-blocking cross-connect allows selection of add, drop or continue traffic with any legal mix of tributary granularity for up to four STM-1/OC-3 capacity
• Re-time all tributaries based on single reference for any high or low order tributaries from the two line traffic TelecomBus buses
• Provides pointer processing, alarm detection and extensive performance monitoring for all tributaries