4-14
Issue 9 October 1998
363-206-204
Powering, Verification, and Circuit Pack Installation
27G-U (OLIU)
The 27G-U OLIU is used in Releases 9, 11 and 13 configurations for shelves
acting as DDM-2000 FiberReach host nodes.
1. The 27G-U OLIU circuit pack has no customer set options.
2. For DDM-2000 OC-3 shelves serving as FiberReach host nodes in a dual
homing application, the function unit slot in which the 27G-U OLIU is to be
inserted is crucial for proper operation. This function unit position must be,
coincident with the Main OLIU that is receiving its signal from the direction
of the node where the signal was originated (not from the direction of the
other FiberReach host). When this is the Main-1 OLIU, the 27G-U OLIU
must be inserted in the function unit a-1, b-1, or c-1 position since function
unit position 1 is associated with Main-1. When this is the Main-2 OLIU, the
27G-U OLIU must be inserted in the function unit a-2, b-2, or c-2 position
since function unit position 2 is associated with Main-2. For an example of a
FiberReach dual homing application, refer to Figure 4-17.
3. Place, but do not fully install, the 27G-U OLIU circuit pack(s) into the shelf.
24G-U (OLIU)
The 24G-U OLIU is used in Releases 11 and 13 configurations for shelves acting
as DDM-2000 OC-12 interconnections. This allows an OC-3 shelf to be connected
into an OC-12 ring without needing an OC-12 shelf.
1. The 24G-U OLIU circuit pack has no customer set options.
2. The functionality of the 24G-U is similar to the 22-type OLIU circuit packs,
with add/drop and ring configurations with its VT1.5 and STS-1 TSI capa-
bilities, but supports OC-12 long reach applications from an OC-3 shelf.
The 24G-U OLIU’s TSI performs cross-connections from the Main shelf
position and it has access to the entire capacity of the OC-12 signal. Up to
three of the 12 STS-1s in the OC-12 payload are presented to the TSI, but
all 12 STS-1s are passed through a faceplate connector to the other Main
24G-U for ring functionality. This requires a jumper cable that is connected
from the faceplate connector of one 24G-U to the faceplate connector of
the second 24G-U in the adjacent slot.
3. Place, but do not fully install, the 24G-U OLIU circuit pack(s) into the shelf.
To Next Page
Loading...
Need help?
General
