Circuit Protection Types; Table - Cisco 15454-DS1-14= - 1.544Mbps Expansion Module Reference Manual

Chapter 11 Circuits and Tunnels
Although ML-Series cards do not use the Telcordia GR-1093-CORE state model, you can also set a soak
Note
timer for ML-Series cards ports. The soak period is the amount of time that the ML-Series port remains
in the Down state after an error-free signal is continuously received before changing to the Up state. To
find the remaining port soak time, choose the Maintenance > Ether/POS Port Soak tabs in ML-Series
card view and click the Retrieve button.
For more information about port and cross-connect states, see
States."

11.2.4 Circuit Protection Types

The Protection column in the Circuit window shows the card (line) and SONET topology (path)
protection used for the entire circuit path.
this column.

Table 11-3

Protection Type
1+1
2F BLSR
4F BLSR
2F-PCA
4F-PCA
BLSR
DRI
N/A
PCA
Protected
Unknown
Unprot (black)
Unprot (red)
Path Protection
78-18106-01
Table 11-3
Circuit Protection Types
Description
The circuit is protected by a 1+1 protection group.
The circuit is protected by a two-fiber BLSR.
The circuit is protected by a four-fiber BLSR.
The circuit is routed on a protection channel access (PCA) path on a two-fiber
BLSR. PCA circuits are unprotected.
The circuit is routed on a PCA path on a four-fiber BLSR. PCA circuits are
unprotected.
The circuit is protected by a both a two-fiber and a four-fiber BLSR.
The circuit is protected by a dual-ring interconnection (DRI).
A circuit with connections on the same node is not protected.
The circuit is routed on a PCA path on both two-fiber and four-fiber BLSRs. PCA
circuits are unprotected.
The circuit is protected by diverse SONET topologies, for example, a BLSR and a
path protection configuration, or a path protection configuration and 1+1 protection.
A circuit has a source and destination on different nodes and communication is
down between the nodes. This protection type appears if not all circuit components
are known.
A circuit with a source and destination on different nodes is not protected.
A circuit created as a fully protected circuit is no longer protected due to a system
change, such as removal of a BLSR or 1+1 protection group.
The circuit is protected by a path protection.
11.2.4 Circuit Protection Types
Appendix B, "Administrative and Service
shows the protection type indicators that appear in
Cisco ONS 15454 Reference Manual, R8.5
11-9