Lucent Technologies DDM-2000 OC-3 - Page 411

363-206-285
Circuit Pack Descriptions
Issue 3 June 2001
7-133
■ Processes the received clock and provides a reference clock to the TG
circuit packs
■ Provides express processing for VT AIS for VT cross-connected STS-1s.
Control Functions 7
The major control functions are as follows:
■ Switches protection for DS3, MXRVO, STS1E, other OLIU, and TG circuit
packs
■ Processes transport and path overhead
■ Stores inventory information ( CLEI code, date of manufacture, etc.)
■ Supports VT and STS signal degrade unidirectional path protection
switching for up to three STS-1s
■ Supports STS-1 BER signal fail (10
-3
or 10
-6
) path protection switching for
up to three STS-1s
■ Supports path protection switching based on STS-1 unequipped, STS-1
AIS, STS-1 LOP, VT AIS, VT unequipped, and VT LOP for up to three
STS-1s.
Maintenance Signal Functions 7
The major maintenance signal functions are as follows:
■ Inserts and detects STS-1 path AIS
■ inserts and detects VT1.5 path AIS for up to three STS-1s
■ Inserts and detects OC-12 line AIS
■ Inserts and detects STS-1 path unequipped signal for up to three STS-1s
■ Inserts and detects VT path unequipped signal for up to three STS-1
■ Inserts and detects line FERF
■ Inserts and detects STS-1 path yellow for up to three STS-1s if VT1.5
cross-connected
■ Detects OC-12 line failures (LOS, LOF, AIS, and BER)
■ Detects OC-12 line signal degrade BER, STS-1 path and VT1.5 path signal
degrade, and signal fail for up to three STS-1s.