Partyline: What is the IF4W4 interface?

The IF4W4 4-channel four-wire interface is a modular interface that enables up to 4 four-wire communication systems (such as cameras, TELCO lines and 2-way radio) to interface with the Clear-Com intercom system. It matches standard transmit/receive lines (at normal levels) to Clear-Com Party Line level.

The IF4W4 is powered by the Clear-Com intercom line using standard two-conductor shielded MIC cable. The cable is run from the output connector of a Clear-Com main or remote station to the rear panel of the IF4W4.

Front Panel Controls:
For each channel the IF4W4 front panel contains ‘Out’ (transmit), ‘In’ (receive), ‘Null’ level controls and level indicators. For all channels a test jack and a four-pin headset XLR connector that connects to built-in test oscillators is provided to set and monitor the circuit nulling of each channel.

The ‘Link’ switches enable you to assign each of the four-wire systems to separate intercom channels, or put two, three, or all four systems on one party line.

Rear Panel:
The IF4W4 rear panel provides four three-pin XLR connectors for interfacing up to four different Clear-Com lines, as well as four terminal block connectors for four-wire input and output. The interface mounts in a standard 19 in. equipment rack and is 1RU in height.