Lucent Technologies DDM-2000 OC-3

363-206-285
Maintenance Description
Issue 3 June 2001
9-33
Figure 9-16. DRI Path Protection Switching
Serving Node
Serving Node
Serving Node
Serving Node
CO
RT
CO
CO
OC-3/OC-12
INTEROFFICE RING
OC-3
LOOP RING
RT
RT
Service
Protection
EC-1/OC-3/IS-3
Two-Way
Add/Drop
Cross-Connection
Two-Way
Add/Drop
Cross-Connection
Two-Way
Pass Through
Cross-Connection
Two-Way
Pass Through
Cross-Connection
Two-Way
Pass Through
Cross-Connection
Two-Way
Pass Through
Cross-Connection
Two-Way
Drop and Continue
Cross-Connection
Two-Way
Drop and Continue
Cross-Connection