Circuit Protection Types


The following table describes the protection types that can appear on the Circuits tab.

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.