363-206-295
Circuit Pack Descriptions
7-38 Issue 1 December 1997
BBG11B 3DS3 Quick Reference Summary 7
Transmit Functions 7
The 3DS3 circuit pack transmit functions are as follows:
■ Receives three B3ZS encoded DS3 signals from a DSX-3
■ Recovers three DS3 clocks and NRZ data
■ Optionally checks and/or corrects P-bit parity errors
■ Synchronizes the data signals to STS-1 signal rate
■ Inserts STS-1 path overhead
■ Provides three STS-1 signals to the TSI circuit packs.
Receive Functions 7
The following receive functions are performed by the BBG11B 3DS3 circuit pack:
■ Desynchronizes the incoming STS-1 signals
■ Terminates the STS-1 paths
■ Optionally checks and/or corrects P-bit parity errors
■ B3ZS encodes the outgoing DS3 signals
■ Pre-equalizes the DS3 signals (with LBO) and transmits them to the
DSX-3.
Control Functions 7
The major control functions are as follows:
■ Protection switching for TSI and 3DS3 circuit packs
■ STS-1 path overhead processing
■ Internal fault detection
■ Inventory information (
CLEI
code, date of manufacture, etc.).
To Next Page
Loading...