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TN776 - AVAYA Definity Expansion Interface	TN776 - AVAYA Definity Expansion Interface List Price: $225.00 Our Price: $75.00 Product Code: AVA_TN776

Description   The TN776 Expansion Interface - 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 circuit pack in place of a TN776 circuit pack.  Replace by TN570B/C in R7si and later. One year warranty. This item is also known as TN776 and 63334

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