Administration and Provisioning
8-34 Issue 8.0 July 2002
1-Way-DRI Cross-Connections 8
A 1-way-DRI cross-connection is a 1-way add cross-connection and a
superimposed 1-way through cross-connection sharing the same destination. The
add cross-connection and through cross-connection share the same outgoing
service STS-1 tributary of OC-48 high-speed line 1E or 1W. For example, Figure
8-12 shows incoming service STS-1 tributary 2 of STS-3 tributary 3 (3-2) on
OC-48 high-speed line 1W cross-connected to outgoing service STS-1 tributary 2
of STS-3 tributary 3 (3-2) on OC-48 high-speed line 1E. Service low-speed port 2
of slot 6B (6B-2) is also cross-connected to outgoing service STS-1 tributary 2 of
STS-3 tributary 3 (3-2) on OC-48 high-speed line 1E.
A single input enters an active add cross-connection and a standby through
cross-connection.
Figure 8-12. STS-1 1-Way-DRI Cross-Connections at an FT-2000
OC-48 Add/Drop-Rings Terminal
1
3-2
16
FT-2000 OC-48 Add/Drop-Rings Terminal
STS-1 Tributaries
OC-48
1E
Low Speed Interface Slots
OC-48
1W
1
3-2
16
1-Way-DRI
1A-1 6B-2 8B-3
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