You are bidding on a Refurbished Avaya Legend DS1 T1 Module, (SEE PHOTOS).
More Information
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Provides one DS1 circuit (24 channels) which can be configured as either T1 or ISDN Primary Rate Interface (PRI)
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Configured as T1 provides 24 digital channels operating at 64kbs
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Configured as ISDN/PRI provides 23 digital channels and 1 bearer channel
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Channel Service Unit (CSU) is needed for full integration