363-206-204
Powering, Verification, and Circuit Pack Installation
Issue 9 October 1998
4-15
Other Circuit Packs
BBF5 (Jumper) Circuit Pack
The BBF5 (jumper) circuit pack is required only for DDM-2000 OC-3 shelves (prior
to Group 4) with 27G-U / 27G2-U OLIUs in both slot positions of a function unit
group.
1. Place, but do not fully install, the BBF5 circuit pack in the low speed group
protection slot 8(P) associated with the function unit group where 27G-U
OLIUs are equipped or in protection slot 8(P) and slot 4 where 27G2-Us
are equiped.
NOTE
:
BBF5 circuit packs are not required for Group 4 shelves.
NOTE
:
The BBF5 is NOT required when a single slot of a function unit pair is occu-
pied by a 27G-U or 27G2-U (such as host nodes for a dual homed Fiber-
Reach application).
BBG6 (STS-1E) Circuit Pack
The BBG6 circuit pack (Releases 6, 7, 8, 9, 11 and 13) is used to provide
bidirectional transport of one EC-1 signal through the DDM-2000 Multiplexer.
The BBG6 circuit pack has two option switches:
■
High/Low speed switch where the STS-1E high speed mode inter-
faces with the DS1 circuit packs in a function unit group at the VT-G
rate. STS1E low speed mode interfaces with the OLIU circuit pack at
the STS-1 rate.
NOTE
:
The BBG6 (STS1E) high speed mode is only available with Release 6.0 or
higher
linear
systems.
■
Line build out switch (distance to DSX or terminating equipment)
1. Set the BBG6 circuit pack option switches as shown in Figure 4-18.
2. Place, but do not fully install, the BBG6 circuit packs into the shelf.
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