Lucent DDM-2000 OC-3 User And Service Manual page 301

NTP-031
: Circuit Order
Page 3 of 6
DO ITEMS BELOW IN ORDER LISTED. . . . . FOR DETAILS, GO TO
10. If one of the terminating ends is equipped with DS1 or TMUX
circuit packs for a DS1 or DS3 interface to support services being
established, establish initial DS1 (NTP-004) or DS3-to-DS1
(NTP-020) service.
11.
NOTE:
Ring releases support only manual VT1.5 and STS-1
cross-connections. Manual STS-1 and/or DS1
cross-connections have to be made at each shelf to
configure the transmission path for each DS1 circuit being
established. Either terminating (drop) cross-connections or
"drop and continue" cross-connections are made at
terminating nodes and pass-through cross-connections are
made at intermediate nodes.
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 (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 provisioned as STS-1 cross-connections.
DDM-2000 OC-3 M
Issue 2, February 2000
ULTIPLEXER
363-206-285