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Definity TN777 Network Controller Refurbished

Item #: TN777

The Avaya Definity TN777 Network Controller (TN777) is available refurbished from TelecomEx.

  • Communicates control channel messages between the processor circuit pack and the distributed network of port circuit packs on the TDM bus
  • Controls 4 data channels that process and route information directly from the processor circuit pack to customer connected equipment
  • Has time of day clock with battery back up for power failure or low voltage conditions
  • Monitors the status of the system clocks and alerts the processor circuit pack in the event of a failure of any clock
  • Supports ISDN
  • Fully refurbished