Lucent Technologies FiberReach DDM-2000 - Page 174

363-206-305
Shelf Descriptions and Configurations
3-20
Issue 3 June 2000
Figure 3-19. DDM-2000 FiberReach with 1x1 Protected T1 Extension Services
A 1x7 protection architecture, shown in Figure 3-20, allows up to seven service
and one protection unit per multiplexer. A 177A apparatus blank is required in any
unused slots.
S
Y
S
C
T
L
Function
Units
O
L
I
U
O
L
I
U
A B C D
(P)
Low Speed
Groups
U
S
E
R
P
A
N
E
L
T
1
E
X
T
T
1
E
X
T
T
1
E
X
T
T
1
E
X
T
T
1
E
X
T
(P)
T
1
E
X
T
(P)
T
1
E
X
T
(P)
T
1
E
X
T
(P)
G2
-U
G2
-U
tpa 843637/01
2
6
2
6
Main*
* 28G-U in Main slots for OC-3
* 29G-U in Main slots for OC-12