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Avaya Definity TN556B ISDN-BRI 4-Wire Interface (Refurbished)

Avaya Definity TN556B ISDN-BRI 4-Wire Interface (Refurbished)

Our Price: $49.00

Product Code: AVDEFTN556B-REF


Provides 12-ports connecting to ISDN-BRI terminals. Each port uses TXT, TXR, PXT, PXR signal leads and ranges up to 3300 feet maximum from the system to the voice terminal.

Key Features:

  • Mfr. Part #: TN556B
  • Ports connection to ISDN-BRI terminals: 12
  • Signal leads: TXT, TXR, PXT, and PXR
  • Up to 8 ports can be used for ASAI links
  • 2 B-channels
  • 1 D-channel
  • Range up to 3300 ft.
  • Compatible with Definity R7 or late
  • Requires a packet control circuit pack (TN778) if using R6si systems

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