68 Hardware optionsAnalog Terminal Adapter (ATA)The ATA connects an analog device such as a fax machine or modem tothe telephone. This allows simultaneous use of the telephone and theanalog device. The ATA is available for the M3902, M3903, M3904, andM3905 models. It requires an Accessory Connection Module.Accessory Connection Module (ACM)The ACM is an optional hardware module that installs into the telephonefootstand. The ACM provides a port(s) to connect to the accessorycartridge interface.Figure 7 "Accessory Connection Module" (page 68) shows the ACM beinginserted in the footstandFigure 7Accessory Connection ModuleThe M3902 set has one accessory port. The M3903, M3904, and M3905have two accessory ports. The plug-in cartridge allows the M3900 seriessets to use the following accessories:• ATA• external alerter and recording interface• personal directory PC utility (M3904 and M3905)• full duplex handsfree cartridge (M3904 Release 3)The M3901 set does not support the ACM.Key-based Access Expansion Module (KBA)The KBA has 22 keys which function as additional keys to the physicaland self-labeled programmable feature keys on the M3900 series sets.You can use these additional keys as DN or feature keys. The sets andmodules attach in such a way as they look and feel like one integratedunit. Only the M3904 and M3905 sets use the KBA.Nortel Communication Server 2100M3900 Series Meridian Digital Telephones User GuideNN42200-110 09.01 Standard20 August 2008Copyright © 2008 Nortel Networks.
