363-206-305
Administration and Provisioning
Issue 3 June 2000
8-23
identify ring channels in Main 1 as different from Main 2 because both rings are
always provisioned with the same information.
Cross-Connection Types
8
There are three different VT1.5 cross-connection types for the DDM-2000
FiberReach Multiplexer: termination/drop, pass-through, and locked.
Termination/Drop Cross-Connection
8
The termination/drop cross-connection is used in all path-switched ring
applications for DDM-2000 FiberReach, where DS1 low-speed signals are cross-
connected to VT1.5 channels in both rotations of the rings terminating on the
high-speed interfaces. With this cross-connection, all added signals are bridged
on to both rotations of the ring; the better of the two signals received from the two
rotations of the ring is dropped.
As shown in Table 8-6 and Table 8-7, at the entry and exit points, the VT channels
are cross-connected to the low-speed ports (for example,
{ls group}-
{slot#}-{port# on slot}, a-1-4)
. These are called "drop" connections.
For example, the command
ent-crs-vt1:m-1-3-4,b-1-4
connects the fourth
low-speed port associated with slot 1 of low-speed group B to the fourth VT1.5
within the third VT group within the first STS-1 of both rings.
Table 8-6. DDM-2000 FiberReach Manual VT1.5 Cross Connections
(Termination/Drop) in a 1 x 1 Configuration
From To
Example
CommandsAddress OLIU Address
CP
Typ e
(Notes)
m-1-{1-7}-{1-4,all} OC-1 <--> a-1-{1-4,all} DS1 ent-crs-vt1:m-1-1-1,a-1-1
m-1-{1-7}-{1-4,all} OC-1 <--> b-1-{1-4,all} DS1 ent-crs-vt1:m-1-3-4,b-1-4
m-1-{1-7}-{1-4,all} OC-1 <--> c-1-{1-4,all} DS1 ent-crs-vt1:m-1-3-3,c-1-3
m-1-{1-7}-{1-4,all} OC-1 <--> d-1-{1-4,all} DS1 ent-crs-vt1:m-1-3-3,d-1-3
m-{1-3}-{1-7}-{1-4,all} OC-3 <--> a-1-{1-4,all} DS1 ent-crs-vt1:m-1-1-1,a-1-1
m-{1-3}-{1-7}-{1-4,all} OC-3 <--> b-1-{1-4,all} DS1 ent-crs-vt1:m-1-1-1,b-1-1
m-{1-3}-{1-7}-{1-4,all} OC-3 <--> c-1-{1-4,all} DS1 ent-crs-vt1:m-1-1-1,c-1-1
m-{1-3}-{1-7}-{1-4,all} OC-3 <--> d-1-{1-4,all} DS1 ent-crs-vt1:m-1-1-1,d-1-1
m-{1-12}-{1-7}-{1-4,all} OC-12 <--> a-1-{1-4,all} DS1 ent-crs-vt1:m-1-1-1,a-1-1
m-{1-12}-{1-7}-{1-4,all} OC-12 <--> b-1-{1-4,all} DS1 ent-crs-vt1:m-1-1-1,b-1-1
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