363-206-295
Shelf Descriptions and Configurations
3-16
Issue 1
December 1997
OC-12 STS-3c Broadcast Shelf
3
Figure 3-11 shows a DDM-2000 OC-12 CO shelf equipped for an STS-3c
broadcast application. This configuration uses a pair of OC-3cs provisioned for
video. Each OC-3c is split and fed onto different rotations of the ring. There is no
protection switching between the function unit circuit packs (unprotected). Each
drop (RT) location can be provisioned to drop any or all of the STS-3cs to OC-3 or
IS-3 circuit packs. Bandwidth on the ring, not provisioned for this application, can
be used for other path-switched ring applications as shown in the figure with 6
DS3s and 3 EC-1s. This configuration also supports Locked STS-3c Broadband
Services.
Figure 3-11. DDM-2000 OC-12 STS-3c Broadcast Shelf
T
S
I
T
S
I
G
1
2
G
L
I
U
D
S
3
D
S
3
D
S
3
D
S
3
O
L
I
U
O
L
I
U
O
3
3
3
3
Timing
T
T
1
2
1
1
1
1
S
Y
S
C
T
L
O
H
C
T
L
1
1
U
S
E
R
P
A
N
E
L
A
B
TSI
A
B
C
D
Main
1
7
7
C
A
P
P
B
L
K
1
7
7
C
A
P
P
B
L
K
2(P)
2(P)
2(P)
2(P)
2(P)
2(P)
Function Units
3
S
T
S
1
E
3
S
T
S
1
E
To OC-12
Ring
To OC-3
Source
L
I
U
O
