363-206-285
Shelf Descriptions and Configurations
3-12 Issue 3 June 2001
OC-3 Ring Shelf 3
An example of an OC-3 ring shelf is shown in Figure 3-4. The 22-type OLIU circuit
packs are equipped in the main positions. The ring shelf optionally supports DS1,
DS3, and EC-1 low-speed interfaces. Total ring capacity must not exceed 84
DS1s.
The shelf can be used in an OC-12 VT1.5 path switched ring (0x1) application.
Equipping the main slots with 24-type OLIUs allows the shelf to provide an OC-12
ring interface.
Figure 3-4. DDM-2000 OC-3 Ring Shelf
D
S
1
D
S
1
D
S
1
67
D
S
1
D
S
1
D
S
1
234
D
S
1
5
D
S
1
1
C
T
G
2
T
G
1
O
L
I
U
O
L
I
U
M
X
R
V
O
M
X
R
V
O
11
A
B
S
Y
S
C
T
L
U
S
E
R
A
N
E
L
P
AUXCTL
SYSCTL
2(P) 2(P)
8(P)
O
H
C
T
L
Timing Main
Group A Group B Group C
Function Units
Low Speed
2
2
2
2
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