Simplex conversation (Event Handler)

General

This document describes how you can override the voice-operated duplex (VOX), and have a fixed speech direction. Two applications are described.<br\> The first one describes how calls from a master station can be programmed to have initial speech direction from the called station towards the master station.<br\> The second one describes how the whole exchange can be set in permanent simplex mode.<br\> Software requirement: AMC 08.20 or newer.

Initial Speech Direction B to A

When a master station calls a substation it is often required that the conversation should have a fixed speech direction from the substation towards the master station.<br\> By using the AlphaCom Event Handler, it is possible to force the M-key on the B-subscriber ON when the conversation starts, and release the M-key when the conversation cancels. This will force the initial speech direction to be from the substation towards the master station. By operating the M-key, the master can override the speech direction. (In AlphaCom, the last one who is pressing the M-key will get the speech direction). If the master makes a short M-key press the conversation will turn to voice switched duplex.

Programming

From AlphaPro main menu, press the Users & Stations button. Select the master station from the list box, and press the Events button. Create a new event by pressing the “+” button. Select:

• Event type: 08 - Conversation Outgoing
• When Change to: ON
• When Related To: All
• Action: PAUSE

$M L%2.DIR

<br\><br\><br\>

Create a second event for the same master station by pressing the “+” button again. Select:

• Event type: 08 - Conversation Outgoing
• When Change to: OFF
• When Related To: All
• Action: $MREL L%2.DIR

<br\><br\> If there are several stations to have initial speech direction set, you must create the same two events for each of the stations and set the new station as Event Owner.