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Inter-Tel 520.2040 Axxent KSU Telephone System No Voicemail


Compare at: $711.99

(You save $112.99)

SKU: 520_2040
Condition: Refurbished

A-Stock: Great cosmetic condition.

B-Stock: May contain cosmetic blemishes such as surface scratches, worn or yellowed buttons, etc...

These phones have been tested and are fully functional. All phones are refurbished and come individually boxed with new curly cords, new designations, and a one year warranty!


The Inter-Tel 520.2040 is a digital KSU (Key Service Unit) for the Inter-Tel Axxent line. The 520.2040 is a phone system designed for small businesses. This particular system does not include voicemail, it would have to be added separately. The phone system is a digital phone system with support for up to 12 digital end points and 4 analog lines incoming.

Inter-Tel 520.2040 KSU Features:

  • Digital Key Service Unit
  • Support for 12 Digital Phones
  • Allows for 4 Analog FXO / CO Lines
  • Revision N


  • Loop Start Card
  • DKSC12 Digital Card
  • 827.8651 Software Call Processing V2.0-02
  • 827.8608 Software DB Program Disks V2.0-01
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