Lucent Technologies DDM-2000 OC-12 User Manual

363-206-295
Maintenance Description
9-12 Issue 1 December 1997
Figure 9-4. Maintenance Signaling — Path Switched Ring Applications (Sheet 1 of 4)
DDM-2000
Ring 2
Ring 1
LOS
LOF
Line AIS
M
A
I
N
B2
DS3
FERF
M
A
N
B1
I
OC-12 OC-12
DS3 AIS*
STS-Path Yellow*
STS-Path Yellow*
DDM-2000
Ring 2
Ring 1
M
A
I
N
B2
DS3
M
A
N
B1
I
OC-12 OC-12
STS-path AIS †
DS3 AIS*
STS-Path Yellow*
STS-Path Yellow*
DDM-2000
Ring 2
Ring 1
M
A
I
N
B2
DS3
M
A
N
B1
I
OC-12 OC-12
STS-LOP
STS-path AIS
FERF
STS-Path Yellow
STS-path AIS is sent on pass-through and continue paths only
STS path yellow appears on pass-through and continue paths only
†
‡
§
*
STS-path AIS †
STS path yellow is passed to the EC-1 or OC-12 interface depending on
whether the STS-1 path is a drop or pass-through connection
STS-path yellow, DS3 AIS and STS-path AIS are sent on STS-1
paths selected from the failed ring (ring 1)
STS-Path Yellow ‡

Lucent Technologies DDM-2000 OC-12 Specifications

General

Brand	Lucent Technologies
Model	DDM-2000 OC-12
Category	Multiplexer
Language	English