Mitel 6800 / Aastra 6700i / 6800i Series IP/SIP Phones

Aastra M670i (536M) Expansion Module

  • Like New: $199.98
Availability: In Stock

Aastra M670i (536M) Expansion Module

The Aastra M670i (536M) Expansion Module provides support for additional programmable keys. It provides 36 programmable keys and up to three expansion modules. Each button on the module has an LED status indicator that alerts users to the status of lines or extensions in a busy lamp field configuration.


  • 36 keys with LEDs
  • Connect up to 3 expansion modules per supported phone model
  • LED Status Indicators


  • Aastra 57i, 57i CT, 6735i, 6737i, and 6739i
  • Aastra 57i and 57i CT - no power supply required
  • Aastra 6735i and 6737i - AC adapter is required if using more than a single expansion module
  • Aastra 6739i - AC adapter is required if using any expansion modules (not included; see option below)

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