Alcatel-Lucent 9500 MXC User Manual page 703

North Gateway or Any-to-Any Operation
3DB 23063 ADAA - Rev 004 July 2007
Unlike hot-standby and diversity protection, ring protection switching is
restorative; once a fault condition has cleared, the ring will automatically unwrap
at a time determined by the Error-Free Timer and the optional Delay Ring
Unwrap Timer, so that only the primary ring is carrying traffic.
The east, west, clockwise and anti-clockwise descriptors are conventions used to
describe and configure 9500 MXC ring operation. The physical layout of a ring
may be quite different but the descriptors still apply.
Super-PDH ring architecture supports configurations for North Gateway or
Any-To-Any operation.
• With North Gateway, one of the nodes operates as the gateway, through which
all traffic on the ring is sourced and sent.
• For any-to-any operation, traffic can be routed from any node in the ring to any
other node.
Operation of a 9500 MXC ring is described in 9500 MXC User Manual, Volume II,
Chapter 3. Protected Operation.
The wrapping action within a 9500 MXC Node is described in 9500 MXC User
Manual, Appendix F.
9500 MXC User Manual
Vol. VI-A-3