The M3904 Professional Telephone is a multi-line digital phone supporting up to 12 lines. Enhancements include offering the largest display in its class, a Personal Directory, Call Log, and a variety of user selectable options. Support for Personal Directory PC Utility allows you to create a directory of up to 100 names and download it to the phone. The Phase 3 M3904 also supports Full Duplex Handsfree with the addition of the new Full Duplex Handsfree Accessory that easily snaps into the Accessory Connection Module.

• Multi-line phone with five-line x 24-character display


• Personal Directory and Call Log for incoming and outgoing calls


• Interactive soft keys for quick feature access


• Fixed feature keys:
  
  
  
  • Hold, Goodbye, Volume Control, "Smart" Mute and Headset w/LED, Options, Message, Directory/Log (includes Redial), Applications, Shift
  
  
  
  


• Handsfree key with LED


• Direct-connect headset port


• Supports two snap-in cartridge accessory for the Analog Terminal Adapter (ATA), External Alerter & Recording Interface, and Personal Directory PC Utility. Or add the Full Duplex Handsfree Accessory (with phase 3 M3904 only) or the Computer Telephony Interface Adapter (Meridian 1 only)