363-206-285
Circuit Pack Descriptions
Issue 3 June 2001
7-43
BBF5 Jumper Circuit Pack Description 7
Purpose of Circuit 7
In DDM-2000 FiberReach host applications using the DDM-2000 OC-3
Multiplexer Group 1 or Group 3 shelves, the BBF5 jumper circuit pack
(Figure 7-16) connects signals between slots of a function unit equipped with
27-type OLIUs. The BBF5 also cross-couples the STS-1 signals between function
units equipped with 27G2-U OLIUs. The BBF5 circuit pack is not needed in
Group 4 shelves in any application. The BBF5 must be installed in Slot 8 of the
low-speed group associated with the function unit where both function unit slots
are equipped with 27G-U OLIUs. BBF5 circuit packs must be installed in slots 4
and 8 of the low-speed group associated with the function unit where both
function unit slots are equipped with 27G2-U OLIUs. Depending on the cross-
connection configuration, the removal of a BBF5 may affect transmission and/or
communications over the DCC interface.
Figure 7-16. BBF5 Jumper Circuit Pack
x
x
S1:1
x
x
x
BBF5
JMPR
tpa 789738/02
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