Lucent Technologies FiberReach DDM-2000 - Example of Maintenance Signals as a Result of

363-206-305
Maintenance Description
Issue 3 June 2000
9-11
transmission except for OC-1 line AIS; maintenance signaling is in response to
unprotected failures.
Figure 9-3. Example of Maintenance Signals as a Result of Unprotected Incoming OC-1
Failure for VT1.5 Ring Applications
6
5
6
7
DS1
CP
DSX-1
DS1 AIS
8
1
Line
FERF
8
- Line AIS
- OLIU CP Failure (NE)
4
- Any of
- DS1 CP Failure (FE)
5
- Any of 4
7
8
- Office Alarms
- LEDs
- Telemetry Outputs
- CIT Initiated Reports
Legend
1
2
3
4
Terminal
DS1
Incoming
OC-1 Failure
- LOS
- LOF
- LOP
OLIU
OLIU
8
8
FERF
VT Path AIS
STS-1 Path Yellow
STS-1 Path AIS
VT Path Yellow
Local Indicator
DS1 Yellow
2
- Uncross-connected
STS-Path
- Uncross-connected
VT-Path
- STS Sig.
Fail*
- Any of
or STS Sig.
Fail
1
- Any of
4
- Any of
6
or DS1
LOS, LOF
- VT LOP
LIKELY CAUSES
LIKELY CAUSES
LIKELY CAUSES
LIKELY CAUSES
LIKELY CAUSES
LIKELY CAUSES
LIKELY CAUSES
- OC-1 LOS
- OC-1 LOF
- LINE or Path AIS
DDM-2000 FiberReach System
OLIU
2
4
- VT Unequipped
3
- STS Unequipped
DDM-2000 OC-3 CO
- Line AIS
- OC-1 LOS
- OC-1 LOF