Meridian M3900 Series Digital Phones

Nortel M3900 Key-Based Expansion Module (NTMN37BA70)

  • Like New: $24.88
  • New: $48.88
Availability: In Stock

M3900 Key-based Add-on Module

The Nortel M3900 Key-based Add-on Module is a fully dedicated unit that is attached to an M3900 series phone. This module is built to supply compatible phones with an additional 22 programmable buttons with busy lamp field indicators.


  • Adds 22 additional line/feature keys to phone
  • Fully programmable
  • Busy lamp field indicators
  • Maximum of two add-ons are supported per phone


  • For use with the M3904 and M3905 phones

Part Number: NTMN37BA70
Compatible Part Numbers: NTMN665070

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