Administration and Provisioning
8-48 Issue 8.0 July 2002
â– CONFIGURATION-Enter-Squelch-Map-STS1: For Release 7.0 and
earlier releases, this input creates entry(s) in the STS-1 squelch map for
the addressed STS-1 tributary(s) and identifies the node TIDs of the source
and/or destination node associated with them. When the STS-1 tributaries
associated with a single STS-3 tributary are split up, the STS-3 tributary
source and destination node TID provisioning is no longer correct for the
STS-1 tributaries. This input overrides the provisioned STS-3 source and
destination node TIDs for those STS-1 tributaries. This STS-1 squelch map
provisioning must be done at each node where the affected STS-1
tributary(s) are terminated, looped back using external cabling, or passed
through using STS-3 through cross-connections.
Each FT-2000 OC-48 Add/Drop-Rings Terminal in a 2-fiber ring maintains a
squelch map that allows each STS-1 tributary to have its own source and
destination nodes. This enables switching nodes to squelch STS-1
tributaries that are looped back (through cabled) at the cross-connect panel
based on the source and destination nodes. Thus, if a node that has
through-cabled STS-1 tributaries becomes isolated from the source and
destination nodes of the through traffic due to a node failure or multiple line
failures, only the add/drop traffic at the isolated node will be squelched.
The through STS-1 tributaries will be protected using 2-fiber ring protection
switching.
An entry in the STS-1 squelch map for a 2-way cross-connection is created
by specifying the line, STS-3 tributary, STS-1 tributary, and source node
TID. An entry in the STS-1 squelch map for a 1-way cross-connection is
created by specifying the line, STS-3 tributary, STS-1 tributary, and
direction. If the direction is from the OC-48 line (drop), the source node TID
must be specified. If the direction is toward the OC-48 line (add), the
destination node TID must be specified.
â– CONFIGURATION-Delete-Squelch Map-STS1: For Release 7.0 and
earlier releases, this input deletes entries in the STS-1 squelch map for the
addressed STS-1 tributary(s). The absence of an entry in the STS-1
squelch map means that the provisioned STS-3 source and destination
node TIDs associated with the STS-3 tributary are in effect again.
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