Oc-3 Ring Shelf With An Optical Extension - Lucent Technologies DDM-2000 OC-3 User & Service Manual

363-206-285
Shelf Descriptions and Configurations
OC-3 Ring Shelf with Optical Extension
An example of an OC-3 ring shelf with an optical extension is shown in Figure 3-6.
The 22-type OLIU circuit packs in the main positions carry ring traffic. The 22-type
OLIU circuit packs in function unit B or C positions provide the optical extension
capability. Optical extensions can also be provided from function unit A.
Equipping the main slots with 24-type OLIUs allows the shelf to provide an OC-12
ring interface.
T
G 2 2
2 2
M M
O O
X X D
2
L L
R R S
I I
V V 3
U U
O O
T
G
1 1 2(P) 1 2(P) 1
Timing Main A
Function Units
Figure 3-6. DDM-2000 OC-3 Ring Shelf With an Optical Extension
3-14 Issue 3 June 2001
D D D
2 2 S S S
2 2 1 1 1
O O
D
5 6 7
L L
S
I I
3
U U
D D D
S S S
1 1 1
2(P) 1 2(P) 1 2 3
C
Group A
B
3
D
S
1
8(P)
D
S
1
4
Group B Group C
Low Speed
U
S
O S E
H Y R
C S
P
T C
A
L T
N
L
E
L
AUXCTL
SYSCTL