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Avaya TN776 Expansion Interface Board Refurbished

Item #: TN776

The Avaya Expansion Interface Board (TN776) is an expansion interface for Avaya Definity Release 6 and earlier systems.

  • Allows for TSI between cabinets
  • Systems with PRI or BRI require a TN570B or TN570C instead.
  • Systems R7si and higher also require the TN570B or TN570C
  • Fully Refurbished