107Accessories for the M3900 Series telephoneAccessories for the M3900 Series telephoneOptional 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 AnalogTerminal Adapter, External Alerter Interface, and Meridian CommunicationAdapter. 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 machineto your telephone. The ATA is available for the M3902, M3903, and M3904models.External Alerter and Recorder InterfaceThe 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.HeadsetsAn amplified and unamplified headset is compatible with your M3900 SeriesMeridian Digital Telephones. The amplified headset is an option for noisyenvironments.Headsets vary in electrical, physical and audio characteristics. Performanceperception is subjective so it is recommended that the headset user try using theirheadset with each of the three settings on both internal and external calls todetermine which works best for them.To adjust the headset volume, go to the Options menu, Headset types and selectone of the headset types from the sub-menu item: Headset 1, Headset 2 orAmplified.Refer to your distributor for the latest product bulletin from Nortel Networks forrecommended headset types for the M3900 Series telephone.Key-based Expansion ModuleThe 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.Theexpansion modules are available for the M3904 telephone.
