The ISW-D8125CW-V2 Inovonics EchoStream Interface Module is an interface module and keypad that connects Inovonics EchoStream receivers, repeaters, and wireless transmitters to compatible Bosch Security Systems, Inc. control panels. Use the ISW-D8125CW-V2 in systems spanning large distances to avoid inconvenient hard-wire installations. Place radio frequency (RF) transmitters anywhere within the maximum range. Move the RF transmitters as needed without costly re-wiring.System overviewBosch Security Systems, Inc. control panels connect to hard-wired points and to wireless RF points at the same time. To add RF points, connect a Inovonics EchoStream EN4200 Serial Receiver to the ISW-D8125CW-V2 Inovonics EchoStream Interface Module. Connect the ISW-D8125CW-V2 to the control panel's Zonex 1 or Zonex 2 terminals and to Aux Power.A compatible control panel supports up to two ISW-D8125CW-V2 wireless interface connections. Connect the first ISW-D8125CW-V2 to Zonex 1, and the second to Zonex 2. Each ISW-D8125CW-V2 Inovonics EchoStream Interface Module supports up to 117 supervised RF points.