Nortel M3900 Series Key-Based Expansion Module

Nortel Networks M3900 Key-based 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.

Nortel M3900 Series Key-Based Expansion Module Features

• Each Key-Based Expansion Module has 22 DSS keys.
• Displays up to 22 additional M1 extensions.
• Fully programmable - each button shows status of other PBX extensions.
• LED indicator - view who is on the phone prior to transferring calls.
• Add up to two (2) Key-Based Expansion Modules to your digital M1 phone
• Can be added to M3904 & M3905 phones