Nortel M3900 Series Meridian Digital Telephones bring the functionality of Meridian 1 and Meridian SL-100 to the desktop with display-based interfaces, call log, self-labeling keys, and simplified administration.  The M3900 portfolio offers five models and a variety of accessories to meet diverse requirements for features, ease of use, and productivity.

• M3901 Entry Telephone
  The M3901 Entry Telephone is an economical digital phone solution. This single-line entry-level phone is perfect for use in places such as lobbies or reception areas, cafeterias, hallways, and other areas where telephone use is occasional.
• M3902 Basic Telephone
  Designed for light telephone use in areas such as manufacturing, warehouses, and other business environments, the M3902 Basic Telephone brings a display-based interface and handsfree capability to this single-line phone.
• M3903 Enhanced Telephone
  The M3903 Enhanced Telephone is a multi-line digital phone supporting up to four lines and/or features.
• M3904 Professional Telephone
  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.
• M3905 Call Center Telephone
  The M3905 Call Center Telephone is the multi-line digital phone designed for the specialized needs of the most demanding call center agents and supervisors.