Lucent Technologies DDM-2000 OC-12 - Page 349

363-206-295
Maintenance Description
Issue 1 December 1997 9-23
Figure 9-7. Path Protection Switching
Node C
Node A
Node BNode D
AC CA
(a.) Normal Operation
Node A
Node BNode D
AC
CA
AC
CA
Node C
AC
CA
(b.) Path Failure
SWITCH
MADE