Lucent Technologies DDM-2000 OC-3, User & Service Manual

Page: 388 / 2536

363-206-285
Circuit Pack Descriptions
7-110 Issue 3 June 2001
Control Functions 7
The major control functions are as follows:
■
Switches protection for OC-3 line and 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 protection switching (22F2-U only)
■
Supports STS-1 BER signal fail (10
-3
or 10
-6
) path protection switching
■
Supports path protection switching based on STS-1 unequipped, STS-1
AIS, STS-1 LOP, VT AIS, and VT LOP
■
Supports path protection switching based on VT unequipped (22F2-U
only).
Maintenance Signal Functions 7
The major maintenance signal functions are as follows:
■
Inserts and detects STS-1 path AIS or inserts and detects VT1.5 path AIS
■
Inserts and detects OC-3 line AIS
■
Inserts and detects STS-1 path unequipped signal
■
Inserts and detects line FERF
■
Inserts and detects STS-1 path yellow, if VT1.5 cross-connected
■
Inserts and detects the STS-1 unequipped signal
■
Inserts and detects the VT unequipped signal (22F2-U only)
■
Detects OC-3 line failures (LOS, LOF, AIS, and BER)
■
Detects OC-3 line signal degrade BER.