Specifications

Audio Support with Optional VoIP Intercom

This would include foot switches and headset/handset PTT switches that are part of the

dispatch console system.

The connection between the console channel card and the FSA/VoIP Gateway server PC is

accomplished using the Zetron Audio and Digital Input Interface (950-0690). The

connections made are shown in Figure 36. The pinout for the cable connecting to the

console channel card are given in Table 2.

♦ Installing the Audio and Digital Input Interface Unit

1. Locate the FSA/VoIP server machine in the equipment room so that it is

conveniently close to the equipment rack that holds the dispatch console channel

card assigned to handle the audio for the FSA system.

2. Make up the necessary cable to connect the channel card to the Digital Input 1 jack

on the Audio and Digital Input Interface box (950-0690). The pinout for the end

with the RJ-11 modular connector is shown in Table 2. The leads on the other end

will need to match the connections on the channel card.

3. Make the connections between the channel card and the interface box.

4. Make the connections between the interface box and the server PC.

Note The Audio and Digital Input Interface is also used for systems that

employ radio to carry the voice audio. In these systems the

interface does not handle the voice audio signal, but it is still

required to provide an input for the PTT signal into the FSA Server.

Note The USB-to-Serial Bridge unit must be installed on the server

machine prior to installing the Audio/Digital Interface Unit. The

USB-to-Serial Bridge must be used even if the computer has a

serial port. See

Installing the USB-to-Serial Bridge on page

101.

Note The PTT signal supplied to the FSA Server interface box must be a

dry contact closure. An open-collector circuit or some other

“electrical” signal is not usable.