363-206-285 Detailed Level Procedure: DLP-559
Issue 2, February 2000 Page 6 of 12
DDM-2000 OC-3 MULTIPLEXER
NOTE:
In ring configurations, you should use the following rules in establishing
cross-connections in each ring:
1. All terminating 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. Provisioning now as a VT1.5 cross-connect will
avoid a hit on traffic if the STS-1 cross-connect has to be converted
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 or circuit order, determine the cross-connections [STS-1 or
VT1.5] to be made at each node [pass-through, terminating (drop), and host
OC-48 node(s)] associated with the kind of service being established.
9. Starting at one of the terminating nodes for the DS1/STS-1 circuit being
established, use the rtrv-crs-( ): command at each node in the ring to
verify that the cross-connections specified on the work order or circuit order
may be made. For example, if the DS1 #1 low speed port in the DS1 circuit
pack in slot #2ofLOW SPEED GROUP B (b-2-1) is to be connected to
timeslot m-1-2-1 and the rtrv-crs-vt1: command shows that the
cross-connection is already established, you should determine from office
records if this port is already in-service before continuing with this procedure.
If cross-connections are already assigned or improperly assigned, refer trouble
to the organization responsible for facility design. Improperly assigned
cross-connections may have to be deleted using the dlt-crs-( )
commands.
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