Lucent DDM-2000 OC-3 User And Service Manual page 253

363-206-285
Issue 2, February 2000
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8. !
CAUTION:
Critical or Major alarms will be generated if pass-through
cross-connections are not made on the new shelf before
splicing it into the network.
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-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 provisioned as STS-1 cross-connections.
NOTE:
Up to 84 DS1s may be terminated in a ring network. Once a
DS1 is terminated, that timeslot must be reserved in both
directions around the ring to the far end. Therefore, if a DS1
is terminated (cross-connected) to a function group on a
near-end and far-end terminating shelf, it must also be
pass-through cross-connected in every shelf in the network.
See Cross-Connection Provisioning in the Administration
and Provisioning section of this manual for more information
on cross connections.
DDM-2000 OC-3 M
Circuit Order:
ULTIPLEXER
NTP-026
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