363-206-305
Administration and Provisioning
Issue 3 June 2000
8-37
In Figure 8-1, the example configuration is a ring network with two ring fibers and
six nodes. Ring 1 carries ring traffic in the clockwise direction while Ring 2 carries
ring traffic in the counterclockwise direction. In the example configuration, Node 1
is a DDM-2000 OC-3 shelf equipped with 27-type OLIU circuit packs in the Main
slots, MXRVOs in Function Unit A, and DS1 or DS1PM circuit packs in the Low-
Speed Group A slots. Nodes 2 through 6 are DDM-2000 FiberReach Multiplexer
shelves with 26-type OLIU circuit packs in the Main slots and DS1 or DS1PM
circuit packs in the Low-Speed Group A slots. All shelves are properly installed
and provisioned. This example is for DS1 services. See "System Turnup/Circuit
Order" in the TOP section of this manual for actual procedures.
Ring configurations support manual VT1.5 cross-connections. Manual cross-
connections must be made at
each
node in the network for each circuit being
established. Drop cross-connections are made at the drop nodes where service
enters or exits the node (Nodes 1 and 5) and pass through cross-connections are
made at
each
intermediate node (Nodes 2, 3, and 5).
It is recommended that pass-through cross-connections be entered first, as
shown below, to avoid transient alarms during provisioning.
The following commands may be used to delete, enter, and retrieve cross-
connections:
dlt-crs-vt1
,
ent-crs-vt1
and
rtrv-crs-vt1
. See Chapter
11, "Commands and Reports," for a description of these commands.
To establish the end-to-end DS1 circuit from Node 1 to Node 5, as shown in
Figure 8-1, enter a cross-connection at each node as follows:
1. Enter the following pass-through cross-connections at Nodes 2, 3, and 5:
ent-crs-vt1:m-1-2-3,m-1-2-3:cct=twoway;
2. Enter the following cross-connection to drop the VT1.5 channel from the
OC-1 ring to a DS1 interface at Node 1:
ent-crs-vt1:m-1-2-3,a-2-3:cct=twoway;
3. Enter the following cross-connection to drop the VT1.5 channel from the
OC-1 ring to a DS1 interface at Node 4, a DDM-2000 FiberReach
Wideband shelf:
ent-crs-vt1:m-1-2-3,a-1-3:cct=twoway;
4. Test both paths around the ring. Since DDM-2000 uses non-revertive path
switching to minimize the number of hits on services, the initial path
selection is arbitrary. Use
rtrv-state-path
and
sw-path-vt1
commands to test both ring paths around the ring network at the drop
nodes of the new service. The
sw-path-vt1
command should be limited
to the addresses that are being tested. For the example, the commands to
be used at Node 1 and Node 4 are:
sw-path-vt1:m1-1-2-3
and
sw-path-vt1:m2-1-2-3
.
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