Protection Type
|
Description
|
1+1
|
The circuit is protected by a 1+1 protection group.
|
2F BLSR
|
(ONS 15327, ONS 15454, and ONS 15600 only) The circuit is protected by a 2-fiber bidirectional line switch ring (BLSR).
|
4F BLSR
|
(ONS 15454 only) The circuit is protected by a 4-fiber BLSR.
|
BLSR
|
(ONS 15454 only) The circuit is protected by a both a 2-fiber and a 4-fiber BLSR.
|
DRI
|
(ONS 15327, ONS 15454, and ONS 15600 only) The circuit is protected by a dual-ring interconnect (DRI).
|
N/A
|
A circuit with connections on the same node is not protected.
|
None
|
Circuit protection is not applicable.
|
Protected
|
The circuit is protected by diverse SONET topologies, for example, a BLSR and a UPSR or a UPSR and 1+1.
|
2F-PCA
|
(ONS 15327, ONS 15454, and ONS 15600 only) The circuit is routed on a protection channel access (PCA) path on a 2-fiber BLSR. PCA circuits are unprotected.
|
4F-PCA
|
(ONS 15454 only) The circuit is routed on a PCA path on a 4-fiber BLSR. PCA circuits are unprotected.
|
PCA
|
(ONS 15454 only) The circuit is routed on a PCA path on both 2-fiber and 4-fiber BLSRs. PCA circuits are unprotected.
|
SPLITTER
|
(ONS 15454 only) The circuit has source and destination on MXPP_MR_2.5G and TXPP_MR_2.5G cards. These cards provides splitter (line-level) protection.
|
Unprot (black)
|
A circuit with a source and destination on different nodes is not protected.
|
Unprot (red)
|
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. This protection type is not applicable to DWDM only.
|
UPSR
|
The circuit is protected by a unidirectional path switched ring (UPSR).
|
Unknown
|
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.
|
Y-CABLE
|
(ONS 15454 only) The circuit is protected by a transponder or muxponder card Y-cable protection group.
|