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Call-Waiting
360-degree room coverage: a powerful
Its ease of configuration and management differentiates it from external or separate DSUs/CSUs
each attendant answers different lines
forward and reply to messages
Avaya Definity TN776 Expansion Interface (Refurbished) Handsets Call-WaitingKey Features: Connected to the Time Division Multiplexing (TDM) bus in one Port Network (PN) is an interface between that PN and the TDM bus extended to another PN Packages the TDM control channel with Link Access Procedure on the D channel (LAPD) for transmission over the fiber link between cabinets Provides the time slot interchange between cabinets A system with ASAI BRI or with PRI signaling for the packet bus (PACCON) requires a TN570B C EI
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