363-206-305
Administration and Provisioning
Issue 3 June 2000
8-53
Basic DS3 Cross-Connects
8
Beginning with Release 3.1, the Function Unit of the FiberReach Shelf will support
the DS3 (BBG4B/BBG4B) circuit pack. This provides the ability of transporting
STS-1 services, using the DS3 circuit packs in the Function Unit slots. The cross-
connections are done at the STS-1 rate and they are the traditional two-way DS3
cross-connects.
.
Figure 8-8. Protected DS3 Services
Example Cross-Connections
8
The cross-connect commands at each node are shown in Figure 8-8.
IN
OUT
IN
OUT
IN
OUT
IN
OUT
IN
OUT
IN
OUT
IN
OUT
IN
OUT
Ring 1
Ring 2
IN
OUT
Node 3
DDM-2000 OC-3
MAIN 1
MAIN 2
TSI
A
B
C
m-1
m-2
m-3
m-1
m-2
m-3
m-1
m-2
m-3
m-1
m-2
m-3
Node 2
DDM-2000 OC-3
Node 4
DDM-2000 OC-3
Node 1
DDM-2000 OC-3
MAIN 1
MAIN 2
TSI
ABC
m-1
m-2
m-3
m-1
m-2
m-3
m-1
m-2
m-3
m-1
m-2
m-3
MAIN 1
MAIN 2
TSI
A
B
C
m-1
m-2
m-3
m-1
m-2
m-3
m-1
m-2
m-3
m-1
m-2
m-3
Node 6
DDM-2000 OC-3
DS1
m-2 to m-2
pass through connection
(ent-crs-sts1:m-2,m-2)
a-1-1 to m-1-1-1
a-1-1 to m-1-1-1
(ent-crs-vt1:a-1-1,m-1-1-1)
(ent-crs-vt1:a-1-1,m-1-1-1)
where:
where:
EC-1
BBG4B
(ent-crs-sts1:m-2,b)
a-1-1 = address ofVT1.5 channelin STS1E circuit
a-1-1 = address ofVT1.5 channel
pack in FUNCTION UNITS Group A
in DS1 circuit pack in
Low Speed Group A
m-1-1-1 = address of STS #1
m-1-1-1 = address of STS #1
in MAIN OLIU, VTG #1,VT #1
in MAIN OLIU, VTG #1,VT #1
m-2 to m-2
pass through connections
m-2 to m-2
pass through connections
MAIN-2
MAIN-1
Node 5
DDM-2000 FiberReach
m-1
m-2
m-3
m-1
m-2
m-3
m-1
m-2
m-3
m-1
m-2
m-3
MAIN 1
MAIN 2
A
B
C
m-1
m-2
m-3
m-1
m-2
m-3
m-1
m-2
m-3
m-1
m-2
m-3
TSI
TSI
STS1E
m-2 to m-2
pass through connections
MAIN 2
MAIN 1
TSI
ABC
m-1
m-2
m-3
m-1
m-2
m-3
m-1
m-2
m-3
m-1
m-2
m-3
FNA1
BBG4B
Protected DS3
(ent-crs-sts1:m-2,f)
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