363-206-285
Shelf Descriptions and Configurations
Issue 3 June 2001
3-11
A single DDM-2000 OC-3 shelf supports various shelf configurations including:
■ STS-1 drop
■ Ring
■ Dual Ring Interworking
■ Optical extension
■ VT Hairpin
■ DDM-2000 FiberReach host
■ Dual homing
■ Enhanced routing.
The following sub-sections describe some examples of how the DDM-2000 OC-3
Multiplexer could be equipped for each of these configurations.
‡‡‡ Due to cable congestion, it is recommended that no more than four BBG19s be used per shelf. A G4 shelf or G3 to G4 Fron
Cover Modification Kit is required.
Note:
The following circuit packs require the G4 Shelf, or G3 to G4 Front Cover Upgrade Kit: 24G-U OLIU, 27G-U/27G2-U OLIUs
26G2-U OLIU (always requires G4 Shelf for backplane compatibility), and BBG19 DS3. Additionally, the G3 to G4 upgrade k
is recommended wherever fiber contusion and/or cable dressing is a concern.
The BBF1, BBF2, BBG4, 22F, 22F-U and 22G-U circuit packs have been rated discontinued availability (DA).
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