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Meridian 3900 (M3900) Series Digital Telephones
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.

M3900 Key-based Expansion Module-Overview

Expansion Module provides 22 keys for any combination of lines and features. The M3904 and M3905 each support up to two expansion modules, for a total of 44 additional keys. The Key-based Expansion Module is the perfect option for busy receptionists, administrators, and managers. Use with your Nortel M1 Option 11C PBX system.

Technical Specifications

The M3900 Series Key-based Expansion Module is compatible with these M3900 series phones:


If you have any queries or would like more information about any of the solutions outlined, please contact us or request a call back. Alternately, you can call us on 905 695 2241 or 877 888 3588 for more immediate help and advice.


Meridian M3901

Meridian M3902

Meridian M3903

Meridian M3904

Meridian M3905






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