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Covid-19 & Returns: Due to Covid-19, certain manufacturers we carry are no longer accepting returns on their products until further notice and they are only offering replacements if an item is not working. Please feel free to contact us via phone or email to confirm the return policy on any item you might be interested in before purchasing on our website.
The Meridian M3900 series expansion module provides 22 keys for any combination of lines and features. The Meridian M3904 and Meridian 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.
- Mnfr. Part #: NTMN37
- Use with your Nortel M1 Option 11C PBX system
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