Simplex conversation (Event Handler)

General

This article describes how you can override the voice-operated duplex (VOX), and set the system in Simplex (Press To Talk) mode.

Software requirement: AMC 10.52 or newer.

Whole Exchange in Simplex Mode

This event will set the whole exchange in simplex (Press To Talk) mode (will also work in AlphaNet).

In AlphaPro, go to Exchange and System -> Events, press Insert and create the following event:

• Owner: UDP 8
• Event Type: Conversation Outgoing
• When Change To: ON
• When Related To: All
• Action: @U%2.nod $SET_SIMPLEX L%2.dir U0 U1

Initial speech direction will be from B-subscriber towards A-subscriber.

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

In AlphaPro, go to Exchange and System -> Events, press Insert and create the following events:

---

Event 1 -

Event Owner:	The Master Station (or a UDP group of stations
Event type:	08 - Conversation - Outgoing
Subevent:	0
When change to:	ON
When related to:	All
Action:	PAUSE
	$M L%2.dir

---

Event 2 -

Event Owner:	The Master Station (or a UDP group of stations
Event type:	08 - Conversation - Outgoing
Subevent:	0
When change to:	OFF
When related to:	All
Action:	PAUSE
	$MREL L%2.dir

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If there are several stations to have initial speech direction set, one can use a UDP group as Event Owner.

A UDP group is set as Owner of an event by selecting Exchange & System -> Events - > “Insert”. Now change the “Owner Type” to Station w. UDP. The ID field specifies which UDP group.

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