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Avaya Definity TN775D EPN Maintenance Board V4 - Grade A
Only $37.95
Avaya Definity TN775D EPN Maintenance Board V4 - Grade A
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Avaya Definity TN775D EPN Maintenance Board V4 - Grade A
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Avaya Definity TN775D EPN Maintenance Board V4 - Grade A

SKU 103834 Refurbished (Grading Guide)
Was $99.99 You Save 62%
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Item Information
The Avaya TN775D circuit pack is used in maintenance to monitor power failure signals in an EPN cabinet in R7si/r or later. The TN775D also monitors the clock, monitors and controls the power supplies and battery charger, and monitors air flow and high-temperature sensors.


  • 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
  • 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


  • TN775D EPN Maintenance Board
Avaya Definity TN775D EPN Maintenance Board V4 - Grade A
These items have been refurbished. Refurbished items have been cleaned, tested, and confirmed to be fully functional. Grade A - Refurbished items show wear from consistent use and can have some scratches and may have some yellowing or discoloration.

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