Lucent Technologies FiberReach DDM-2000 - Page 171

363-206-305
Shelf Descriptions and Configurations
Issue 3 June 2000
3-17
DS1 Services Only
3
Figure 3-16, Figure 3-17, and Figure 3-18 show examples of the DDM-2000
FiberReach in a wideband application providing DS1 services only. The wideband
shelf is a complete DS1 to OC-1 or OC-3 or OC-12 solution. The wideband shelf
uses the two main optical line interface unit (OLIU) slots to interface an OC-1 or
OC-3 or OC-12 line to the low-speed group(s). The OLIU circuit packs are
equipped in pairs. Low-speed interface growth proceeds in four DS1 increments
by equipping the low-speed slots with DS1 or DS1PM circuit packs. The system
controller (SYSCTL) is always required in this application.
Figure 3-16 shows a 1x1 low-speed protection configuration with four low-speed
groups (A, B, C, D) for a maximum of four service and four protection units per
multiplexer and equipped to interface an OC-1 line.
Figure 3-16. DDM-2000 FiberReach 16 1x1 Protected DS1 Services Only
A 1x7 protection architecture is shown in Figure 3-17, allowing up to seven service
and one protection unit per multiplexer. Any unequipped slots require a 177A
apparatus blank.
S
Y
S
C
T
L
U
S
E
R
P
A
N
E
L
D
S
1
(P)
D
S
1
D
S
1
(P)
D
S
1
Function
Units
2
6
O
L
I
U
2
6
O
L
I
A B C D
D
S
1
PM
(P)
D
S
1
PM
(P)
D
S
1
PM
D
S
1
PM
U
(P)
Low Speed
Groups
tpa 843634/01
G2
-U
G2
-U
* 28G-U for OC-3
29G-U for OC-12
Main*