Allen Tel Green Backboard 8-1/2" X 20" (Half Module)
(Model # GB183A2)
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Terminate up to 200 pairs of Central Office Cabling. Equipped with 4 GB89D brackets for mounting 4 S66MI-25 (100 pair capacity) or 4 S66MI-50 (200 pair capacity) connecting blocks. The GB89D brackets are mounted on the backboard in such a manner as to provide vertical Jumper Channels which coincide with the GB20 distributing ring positions on the GB184 or GB187B1 type backboards. Terminations of up to 8 25-pair cables can be connected to key telephone sets.
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