Lucent Technologies DDM-2000 OC-12 - Page 341

363-206-295
Maintenance Description
Issue 1 December 1997 9-15
Figure 9-4. Maintenance Signaling — Path Switched Ring Applications —
STS-Unequipped (Sheet 4 of 4)
DDM-2000
Ring 2
Ring 1
DDM-2000
Ring 2
Ring 1
DDM-2000
Ring 2
Ring 1
M
A
I
N
B2
M
A
I
N
M
A
I
N
M
A
N
B1
I
OC-12
B1
B2
M
A
I
N
B2
M
A
I
N
B1
OC-12
OC-12 OC-12
OC-12
OC-12
†
DS3 AIS*
STS
Unequipped
STS
Unequipped
†
STS
Unequipped
STS
Unequipped
Signal is sent on pass-through and continue paths only
STS (RFI) Yellow*
EC-1, OC-N,
or IS-N
STS-1 AIS*
0x1
OC-3
STS-1
Unequipped
* Signal is sent on STS-1 paths selected from the failed ring (ring 1)