User guide

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Accessories for the M3900 Series telephone
Accessories for the M3900 Series telephone
Optional items are available for use with your M3900 Series Digital telephone.
Please contact your System Administrator for additional details.
Note: Wall attachment is available for all four models.
Accessory Connection Module (ACM)
The Accessory Connection Module provides the interface for adding the Analog
Terminal Adapter, External Alerter Interface, and Meridian Communication
Adapter. The ACM is available for the M3902, M3903 and M3904.
Analog Terminal Adapter (ATA)
The ATA allows you to connect an analog device such as a modem or fax machine
to your telephone. The ATA is available for the M3902, M3903, and M3904
models.
External Alerter and Recorder Interface
The External Alerter Interface lets you connect a remote ringer to your telephone.
The External Alerter and Recorder interface is available for the M3902, M3903,
and M3904 models.
Headsets
An amplified and unamplified headset is compatible with your M3900 Series
Meridian Digital Telephones. The amplified headset is an option for noisy
environments.
Headsets vary in electrical, physical and audio characteristics. Performance
perception is subjective so it is recommended that the headset user try using their
headset with each of the three settings on both internal and external calls to
determine which works best for them.
To adjust the headset volume, go to the Options menu, Headset types and select
one of the headset types from the sub-menu item: Headset 1, Headset 2 or
Amplified.
Refer to your distributor for the latest product bulletin from Nortel Networks for
recommended headset types for the M3900 Series telephone.
Key-based Expansion Module
The Key-based Add-on Module provides additional feature keys for the M3904.
You can add up to two Key Expansion modules, for a total of 62 feature keys.The
expansion modules are available for the M3904 telephone.