Circuit Protection Types


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

Protection Type

Description

N/A

Circuit protection is not applicable.

2F MS-SPRing

The circuit is protected by a two-fiber multiplex section-shared protection ring (MS-SPRing).

4F MS-SPRing

The circuit is protected by a four-fiber MS-SPRing.

MS-SPRing

The circuit is protected by both a two-fiber and a four-fiber MS-SPRing.

SNCP

The circuit is protected by subnetwork connection protection (SNCP).

DRI

The circuit is protected by a dual-ring interconnection.

1+1

The circuit is protected by a 1+1 protection group.

Y-CABLE

The circuit is protected by a transponder or muxponder card Y-cable protection group.

SPLITTER

The circuit is protected by the protect transponder (TXPP_MR_2.5G) splitter protection.

Protected

The circuit is protected by diverse SDH topologies, for example, an MS-SPRing and an SNCP, or an SNCP and a 1+1 protection group.

2F-PCA

The circuit is routed on a protection channel access (PCA) path on a two-fiber MS-SPRing; PCA circuits are unprotected.

4F-PCA

The circuit is routed on a protection channel access path on a four-fiber MS-SPRing; PCA circuits are unprotected.

PCA

The circuit is routed on a protection channel access path on both two-fiber and four-fiber MS-SPRings; PCA circuits are unprotected.

Unprot (black)

The circuit is not protected.

Unprot (red)

The circuit created as a fully protected circuit is no longer protected due to a system change, such as removal of an MS-SPRing or 1+1 protection group.

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.