Lucent Technologies DDM-2000 OC-3, User & Service Manual

Page: 1678 / 2536

NTP-039
: Circuit Order 363-206-285
Page 26 of 32 Issue 2, February 2000
DDM-2000 OC-3 M
ULTIPLEXER
DO ITEMS BELOW IN ORDER LISTED. . . . . FOR DETAILS, GO TO
37.
NOTE:
Traffic is now passing from Node 1 (CO) to Node 4 (RTn)
and is accessible to all of the RTs from this direction. The
following steps will work back from Node 4 to Node 2,
reconfiguring the fibers and upgrading the software at each
node.
If this is an add/drop network (with traffic terminating at other
nodes but not at the CO), continue with Step 38. If this is a drop
network (with traffic terminating only between the CO and another
node), continue with Step 41.
38. !
CAUTION:
If this is an add/drop network instead of a drop network and
channels are "added" at the node being converted, service
interruption will occur when cross-connections are deleted.
The following must be performed prior to disconnecting the
fibers from this node to the downstream node to minimize
out-of-service time. For example, if channels are added and
dropped between Node 3 and Node 4, pass-through
cross-connections must be established in all remaining
nodes to minimize service interruption.
For all added channels, use the
ent-crs-( )
command(s) to
set up pass through cross-connections from fn-c to main at all
nodes leading back to Node 1 (CO).
39. Ensure main-to-main pass-through cross-connections are made
at the CO as specified in Step 33.
40. At the node being converted, use the
dlt-crs-( )
command to
delete the cross-connections from function unit A or B (
fn-a
,
fn-b
) to function unit C (
fn-c
). .br Immediately after each
cross-connection is deleted, use the
ent-crs-( )
command to
reroute the channel from
fn-a
or
fn-b
to
main
. This routes the
added traffic channel back to the CO and over the installed ring
nodes to the intended drop points.
41. At Node 3, use the
dlt-crs-vt1:
or
dlt-crs-sts1:
command to delete all "main" to "fn-c" cross-connections.