Telex ES-4000A
4 Channel Intercom Expansion Station

The ES-4000A is an expansion station for the US-2002 user station. It interfaces four additional intercom channels to the US-2002, and it provides talk, listen and call buttons for the four additional channels. There are also four additional program inputs on the back of the ES-4000A, one for each added channel. Up to four ES-4000A expansion stations may be connected to the US-2002 to add up to 16 channels (18 channels total). The ES-4000A typically utilizes the US-2002 microphone and speaker (or microphone headset) for communication with the added channels. The ES-4000A also has individual speaker outputs for independent monitoring of one or more of the four channels if desired. The unit is Clear-Com compatible.

• Digi-Latch Technology
  Separate Listen, Call, and
  Talk buttons with Digi-Latch technology gives users complete control of system communications while maintaining ease of operation
• Backlit Buttons
  Backlit buttons with lettering on the button allows users to see which button to push even in darkened room environments.
• Rack Mountable
  Rack mountable in a variety of modular configurations with one of several optional rack mount kits.
• Mic Kill
  Turn off all microphones on a selected expansion channel, or all channels, using the master station's Mic Kill key.
• Dedicated Program Inputs
  Each expansion channel has its own program input. Connect any line-level audio source for monitoring in the master station's speaker or headset and for routing to the expansion channel if desired. When program audio is routed to the channel it can be set to interrupt while the master station operator is talking on the channel.

Color Black
Depth 10" (254 mm)
Height 1.75" (44.45 mm)
Power Requirements Voltage: Phantom Power: 24 VDC nominal (12 to 30 VDC) Local Power (with PS-L Wall-pack Power Supply or equivalent): 14 to 15 VDC Current: 65 mA, quiescent; 150 mA maximum
Weight 20.8 oz (589.67 g)
Width 8.19" (208 mm)