363-206-295
Shelf Descriptions and Configurations
Issue 1 December 1997 3-15
OC-12 Dual Homing Shelf 3
Figure 3-10 shows a DDM-2000 OC-12 shelf equipped for a dual homing
configuration, allowing two hosts to be active on the same OC-12 ring. This allows
a 0x1 application where traffic is routed to both hosts to provide host protection. In
this application, two DDM-2000 OC-12 shelves are hosting one OC-3 ring. Note
that for single homed 0x1 applications, both function unit slots must be equipped
while, for dual homed 0x1 applications, one function unit slot must be empty.
Figure 3-10. DDM-2000 OC-12 Dual Homing Shelf
T
S
I
T
S
I
G
12
G
7
7
B
L
I
U
D
S
3
D
S
3
D
S
3
D
S
3
O
L
I
U
O
L
I
U
1O 3333
Timing
T
T
121111
S
Y
S
C
T
L
O
H
C
T
L
11
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
Ring
To Next Page
Loading...
Need help?
General
