363-206-295
Administration and Provisioning
8-20
Issue 1
December 1997
Table 8-9.
DDM-2000 OC-12 Manual STS-3c Cross-Connections (COV)
Video/Broadband Applications
8
For video cross-connections at COV and RTV sites, up to four incoming STS-3c
signals from each 21-type OLIU in FN ()-1 and FN ()-2 slots are connected to ring
1 and ring 2 respectively in a one-way unprotected mode.
OC-12 Path Protected Ring Application
8
This is a path protected ring application with multiple NEs in a two-fiber ring. The
main optical units of each node in the ring are equipped with ring OLIU circuit
packs, the 23G/23G-U or 23H/23H-U, to transport signals to the next NE as well
as drop signals at the NE. Valid mapping is provided by termination and pass-
through cross-connections.
OC-12 Path Protected Ring Drop and Continue
Application
8
This is a path protected ring application with multiple NEs in a two-fiber ring. All
but two nodes are normal ring application nodes (see previous application). Two
nodes are defined to be the drop and continue nodes and may or may not be
neighbors (no intermediate nodes). They function to provide two copies of each
service on the ring to another ring (DRI) or to wire centers (dual wire center
service). Special drop and continue cross-connections are used to support this
feature. The 3STS1E, 3DS3, and 21-type OLIU circuit packs are used to transport
traffic between rings or to the wire centers. This feature provides node failure
survival functionality. These two special nodes can also provide normal ring
functionality at the same time.
From
To
“To” CP Type
Example Command
mb-{1,4,7,10}
<-->
{a,b,c,d}-1
23-type OLIU
ent-crs-sts3c:a-1,mb-4:cct=cov
