Administration and Provisioning
Issue 8.0 July 2002
8-33
■ Multiple bridge cross-connections: A multiple bridge cross-connection is
three or more superimposed cross-connections sharing the same source.
The source can be any incoming STS-1 tributary of OC-48 high-speed line
1E or 1W, or any service low-speed port. For example, Figure 8-11 shows
incoming service STS-1 tributary 1 of STS-3 tributary 7 (7-1) on OC-48
high-speed line 1E cross-connected to service low-speed port 1 of slot 6A
(6A-1), port 1 of slot 7B (7B-1), and port 2 of slot 8B (8B-2). Figure 8-11
also shows service low-speed port 1 of slot 3A (3A-1) cross-connected to
service STS-1 tributary 3 of STS-3 tributary 1 (1-3) and STS-1 tributary 1 of
STS-3 tributary 2 (2-1) on OC-48 high-speed line 1W, and service STS-1
tributary 1 of STS-3 tributary 3 (3-1) on OC-48 high-speed line 1E.
Multiple bridge cross-connections can also be made to/from any service
low-speed interface slot and the companion low-speed interface slot (for
example, 2A and 2B) when the slot pair is provisioned for the OC-3 1+1
protected mode. (Any low-speed port associated with the slot pair may be
specified when entering the cross-connection.)
Figure 8-11. Multiple STS-1 Bridge Cross-Connections at an FT-2000
OC-48 Add/Drop-Rings Terminal
1-3
2-1
16
FT-2000 OC-48 Add/Drop-Rings Terminal
STS-1 Tributaries
OC-48
1E
OC-48
1W
1
3-1
7-1
16
Add
Drop Drop
Add
Add
1A-1 3A-1 6A-1 7B-1 8B-2
Low Speed Ports
Drop
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