Nortel M3900 Key Based Expansion Unit provides 22 keys for any combination of lines and features. M3904 and M3905 each support up to two expansion modules, for a total of 44 additional keys.
Nortel M3900 Key Based Expansion Unit is the perfect option for busy receptionists, administrators, and managers. Use with your Nortel M1 Option 11C PBX system.
The single foot stand is not included. Click here to purchase the Nortel Meridian M3903/M3904/M3905 Single Footstand.