DLP-546: Detailed Level Procedure 363-206-285
Page 5 of 20 Issue 2, February 2000
DDM-2000 OC-3 MULTIPLEXER
NOTE:
In ring configurations, you should use the following rules in establishing
cross-connections in each ring:
1. All drop connections (including DRI, if present) from the same
STS-1 timeslot must be provisioned the same, either all VT1.5 or
STS-1.
2. If all 28 VT1.5s (DS1s) in an STS-1 are being passed through at a
node in a VT1.5 path-switched ring, then the cross-connection may
be provisioned as either a pass-through STS-1 or VT1.5. However,
if you anticipate dropping VT1.5s from the pass-through node in
the future, you should provision the pass-throughs as VT1.5
cross-connections. Also, provisioning now as a VT1.5 cross-con-
nect will avoid a hit on traffic if the STS-1 cross-connect has to be
converted (cnvt-crs) to 28 VT1.5 cross-connects to drop DS1s
at a later time.
3. On STS-1 path-switched rings, all nodes in the ring must be provi-
sioned as STS-1 cross-connections.
From work order, circuit order, and the sketch made in Step 1, determine the
pass-through nodes for the service being established.
5. Use the rtrv-eqpt: command at each node to verify that each shelf is
properly equipped for the service being established. For example, is the group
or slot being used for service at the terminating ends equipped with the proper
MXRVO and/or DS1/DS1PM circuit packs if DS1 service is being established?
6.
NOTE:
Cross-connections supporting DS3 services are STS1
cross-connections. Cross-connections supporting DS1 services may be
either STS1 or VT1.5 cross-connections. Use VT1.5 cross-connections
for DS1 services if you expect to cross-connect only a portion of the
VT1.5 signals in the STS-1 channel. If STS1 cross-connections are
made at a shelf, there is a fixed mapping of all 28 VT1.5
cross-connections to a specific shelf group (see ent-crs-sts1
command). If STS1 cross-connections are already made and individual
VT1.5 cross-connections are required, the cnvt-crs: command may
be used to convert the STS1 cross-connection to 28 individual VT1.5
cross-connections. Certain restrictions and requirements must be
followed before converting an STS1 cross-connection to individual VT1.5
cross-connections. See the description of the cnvt-crs command in the
Commands and Reports section of this manual.
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