Circuit Pack Descriptions
Issue 8.0 July 2002
7-85
Quick Reference Summary 7
Transmit Functions 7
The LSSW circuit pack performs the following transmit functions:
a. Receives three DS3 or EC-1 signals from a failed DS3 or STS1E circuit
pack
b. Switches the three DS3 or EC-1 signals to the protection DS3 or STS1E
circuit pack.
Receive Functions 7
The LSSW circuit pack performs the following receive functions:
a. Receives three DS3 or EC-1 signals from the protection DS3 or STS1E
circuit pack
b. Switches the three DS3 or EC-1 signals to the correct service DS3 or
STS1E circuit pack and to the DSX-3 or STSX-1 panel (or equivalent).
Control Functions 7
The LSSW circuit pack performs the following control functions:
a. Controls and powers the protection switching relays on the DS3 and
STS1E circuit packs
b. Stores inventory information (CLEI code, serial number, etc.).
c. Performs internal fault detection and interfaces with the LNCTL circuit pack
using the board controller local area network (BCLAN)
d. Controls the circuit pack faceplate FAULT LED.
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