The IF4B modular 2/4-wire interface connects camera intercoms, two-way radios, fiber optics, and other 2/4-wire devices to a standard Clear-Com intercom line. The 1-RU chassis holds up to four individual interface modules, each with its own 2/4-wire terminal block and XLR-3M connector to interface with Clear-Com.

Featuring broadcast-quality circuitry, the unit matches industry-standard 600-ohm transmit/receive lines (at normal levels) to Clear-Com line level.