In my latest blog posts about INDUSTRONIC functions I introduced you to different one-way and two-way communication procedures. Today´s function combines these two types of voice connections in one application – the so-called “Page & CallBack” function.

You use Page & CallBack if you want to address a person who is somewhere in the plant, but you don´t know exactly where. After the person concerned has called back, both subscribers can speak to each other.

Paging All Individuals

First, you establish an all call and page the specific person. In the announcement the person concerned is asked to call back by dialing a specific call number.

 Private Two-way Communication

The person concerned goes to the next available intercom station and as soon as he calls back, an exclusive two-way connection is established. Both subscribers can now speak and listen alternately, but not simultaneously. All other subscribers cannot listen.

Communication Procedure

The following illustration shows the Page & CallBack procedure in detail.

Duplex Mode

As soon as the person concerned calls back, the conversation can also be held in full-duplex mode. Both subscribers can then speak and listen simultaneously. By default, the conversation is held in half-duplex mode as two-way connection.

Priorities

For the announcement (Page) at the beginning of the communication procedure you can assign different priorities to the intercom stations used. Usually a control room intercom station has a higher priority than an outdoor intercom station. This means that the control room can interrupt an active all call established by an outdoor intercom station and trigger its own call.

Pre-tones and Warning Beacons

It is possible to play back a pre-announcement tone prior to the call. A positive effect is that listeners stop their conversations or noisy activities to focus on the announcement that follows. Furthermore, there is the option to activate flashing warning beacons which indicate the call visually.

Download a more detailed version of this blog article as PDF here.

See also my previous articles about the related functions all call and two-way communication.