Telex ES-4000A 4-Channel Intercom Expansion Station

The ES-4000A is a four-channel expansion station that adds intercom channels and program routing to an RTS 4000-series system. Each channel has its own level control, and the station runs balanced or unbalanced to match the rest of the shop. A separate program input feeds material into the channels, and four RCA outputs put a speaker feed on tap, one per channel.

It is built on a half-rack chassis, 1/2-rack wide by one rack unit high, with a DB-9 female program input and a DB-15 female intercom connection. The station connects to a US-2002 main station and draws from a separate PS-4001 power supply, shipping with a 3-foot 15-pin cable for that supply.