The MS-4002 is a complete four-channel, balanced audio master station and 4 amp system power supply in a single unit. You simply plug it into any AC power outlet from 100 to 240 volts, add a microphone or headset, connect intercom stations to the back panel, and you are ready to communicate. The MS-4002 is now equipped with an advanced programming mode on the front panel, eliminating the need for internal DIP switches. It also has a feature that automatically senses the type of headset attached to the unit, either dynamic or electret. The MS-4002 fits in a standard 19" equipment rack and is 1 rack unit high. The MS-4002 is Clear-Com compatible, with the ability to run in unbalanced mode.

The MS-2002 is a complete two-channel master station and system power supply (24 VDC, 2 amps total power) in a single unit. You simply plug it into any AC power outlet from 100 to 240 volts, add a microphone or headset, connect intercom stations to the back panel, and you are ready to communicate. It even has both single-channel and two-channel connectors, so you do not have to add a separate breakout box if you want to mix single-channel and two-channel intercom stations. The MS-2002 fits in a standard 19" equipment rack and is 1 rack unit high. The basic MS-2002 can communicate with two intercom channels. Connecting optional EMS-4001 expansion stations can increase this number. Each EMS-4001 adds four additional channels, and up to four of these expansion stations can be connected for a total of eighteen channels.

The Telex Audiocom EMS4001 Master Station Expansion Panel connects seamlessly to the MS2002 or MS4002 Master Stations to increase the number of discrete intercom channels from two up to 22. All functions of the Master Station are preserved for all intercom channels by linking the EMS4001(s) to the MS4002/MS2002 via a convenient ?-inch rear data connector. Headset and/or speaker/mic operation for all intercom channels is accessed through the MS2002 or MS4002 Master Station. Can operate in an unbalanced mode to be completely Clear-Com compatible.