363-206-305
Administration and Provisioning
Issue 3 June 2000
8-49
In this Dual Homed configuration, only one rotation of each of the two OC-1
rings terminates on a single OC-3 shelf. More specifically, one rotation of
the inner OC-1 ring terminates on the OC-1 #1 port of the 27G2-U OLIU
placed in Function Unit A-1 of OC-3 Node X, and the corresponding
rotation of the outer OC-1 ring terminates on the OC-1 #2 port of the
27G2-U OLIU placed in Function Unit A-1 of OC-3 Node X as well.
The other rotation of the inner OC-1 ring terminates on the OC-1 #1 port of
the 27G2-U OLIU placed in Function Unit A-2 of OC-3 Node Y, and the
corresponding rotation of the outer OC-1 ring terminates on the OC-1 #1
port of the 27G2-U OLIU placed in Function Unit C-2 of the OC-3 Node Y
as well.
Example Cross-Connections
8
In order to cross-connect each rotation of one ring to the corresponding
rotation of the other ring as illustrated in Figure 8-6, Dual-Homed OC-1
Ring Hairpin Routing would consist of the following items.
To establish the end-to-end DS1 circuit between Node RT-B and RT-A
through Node X and Node Y as shown in Figure 8-6, enter a cross-
connection at each node as follows:
â–
At Node X, enter the following cross-connection:
ent-crs-vt1:a-1-7-4,a-2-1-1:cct=twoway;
This single command establishes the following signal paths through the
Function Unit A of the OC-3 shelf:
— from FN-A-1, STS-1 #1, VTG #7, VT1.5 #4
to FN-A-1, STS-1 #2, VTG #1, VT1.5 #1
— from FN-A-1, STS-1 #2, VTG #1, VT1.5 #1
to FN-A-1, STS-1 #1, VTG #7, VT1.5 #4
— from FN-A-2, STS-1 #1, VTG #7, VT1.5 #4
to FN-A-2, STS-1 #2, VTG #1, VT1.5 #1
— from FN-A-2, STS-1 #2, VTG #1, VT1.5 #1
to FN-A-2, STS-1 #1, VTG #7, VT1.5 #4
â–
At Node Y, enter the following cross-connection:
ent-crs-vt1:a-1-7-4,c-1-1-1:cct=twoway;
This single command establishes the following signal paths through the
Function Unit A of the OC-3 shelf and Function Unit C:
— from FN-A-2, STS-1 #1, VTG #7, VT1.5 #4
to FN-C-2, STS-1 #1, VTG #1, VT1.5 #1
— from FN-C-2, STS-1 #1, VTG #1, VT1.5 #1
to FN-A-2, STS-1 #1, VTG #7, VT1.5 #4
â–
At Node RT-B, enter the following cross-connect:
ent-crs-vt1:m-1-7-4,c-1-1:cct=twoway;
â–
At Node RT-A, enter the following cross-connect:
ent-crs-vt1:m-1-1-1,a-1-1:cct=twoway;
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