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363-206-285
Issue 2, February 2000
Upgrade DDM-2000 OC-3 Add/Drop Network to
DO ITEMS BELOW IN ORDER LISTED . . . . .FOR DETAILS, GO TO
1.
!
CAUTION:
Three STS-1 channels or 84 VT1.5 channels is the
maximum capacity for an OC-3 ring. Before this upgrade is
performed, you should verify that there is enough capacity in
the ring to carry ALL CO sourced channels plus ALL added
channels coming into the network at any RT.
!
CAUTION:
Ring configurations support 84 timeslots within the ring. A
timeslot used for one signal (VT1.5/STS-1) cannot be reused
at another location. Before upgrading from a linear system to
a ring system, verify that no duplicate timeslot assignments
exist. For example in Figure 1 on page 6, if timeslot m-1-1-1
is dropped at Node 2, verify that the same timeslot is not
dropped at another node. If duplicates exist, [for example, if
timeslot m-1-1-1 is dropped at Node 2; m-1-1-2 is
cross-connected to c-1-1-1 (instead of c-1-1-2 ) at Node 2;
and then m-1-1-1 is dropped at Node 3, then you have
duplicate ( m-1-1-1 ) timeslot assignments] you must
rearrange your timeslot assignments to accommodate the
new ring configuration.
!
CAUTION:
This procedure requires 22-Type OLIU circuit packs in all
shelves. If existing OLIU s will be replaced in this procedure
[DLP-542] , you must determine if the 22-Type OLIU s will
support the existing span length. For example,
22F/22F-U/22F2-U OLIU circuit packs will not support span
lengths as long as 21G/21G-U/21G2-U/21G3-U OLIU circuit
packs will support. Optical line power measurements and/or
office records must be used to verify that the existing span
length can be supported.
Path Switched Ring
DDM-2000 OC-3 M
Circuit Order:
ULTIPLEXER
NTP-039
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