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Aastra M670i Expansion Module (536M)

Designed for receptionists, administrative assistants, call center agents, power users, and executives who need to monitor and manage a large volume of calls on a regular basis, the Aastra M670i expansion module provides an intelligent choice for all Enterprise IP environments.
New: $99.99
This product is eligible for 2 Year Platinum Protection!

Aastra M670i Features

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


  • Compatible with 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 (not included; see option below)
  • Aastra 6739i - AC adapter is required if using any  expansion modules (sold separately; see option above)

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