Thread: How to Wire an additional PBX phone
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Old 03-21-2003, 11:18 AM   #10 (permalink)
1A2Key
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Second PRI being installed
It's best to wire all 4 pairs. However you can get away with using the center 2 pair (blue and green 568B) and you will only loose voice announce on busy, a feature that is hardly used.
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