Lucent DDM-2000 OC-3 User And Service Manual page 148

NTP-012
: Circuit Order
Page 2 of 4
DO ITEMS BELOW IN ORDER LISTED. . . . . FOR DETAILS, GO TO
5. From the work order or rtrv-crs-sts1: command, determine
the cross-connections for circuit being discontinued. Use the
rtrv-crs-sts1: command at each node in the ring network to
obtain the STS-1 Cross Connect Report.
!
6.
CAUTION:
Removal of the wrong cross-connect may interrupt service.
NOTE:
DS3 slots cannot be unequipped without an alarm until all
cross-connections are removed. The cross-connections
must be removed first before removing circuit packs. In ring
configurations, remove the cross-connections from the
terminating (drop) nodes first, then remove the pass-through
cross-connections at the non-terminating nodes, if required.
A Critical alarm may occur when the first cross-connection at
the terminating node is deleted and clear when the other
terminating cross-connection is deleted.
NOTE:
In ring configurations, the following rules are used 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. OC-3 ring
Releases 7.0 and earlier do not support the command
(cnvt-crs) for converting an STS-1 to a VT1.5
cross-connect. 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.
DDM-2000 OC-3 M
Issue 2, February 2000
ULTIPLEXER
363-206-285