Avaya/Definity Circuit Packs TN771 - TN802

Avaya Definity TN775B EPN Maintenance Board

  • Like New: $99.00
Availability: In Stock

TN775B EPN Maintenance Board

The TN775B is a Maintenance Board that monitors power failures for the EPN cabinet in R7si/r or later.


  • Monitors power failure signals in EPN cabinets
  • Monitors clock
  • Monitors and controls battery charger and power supplies
  • Monitors air flow and temperature sensors
  • Two serial links for communication for the Expansion Interface (EI) circuit packs, also provides an RS-232 interface for connection with an administration terminal
  • 3-position switch to control emergency power transfer
  • Equipped with a new DC to DC power converter
  • Includes Atlas 1-Year Warranty with Extended Warranty options available!

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