PIONEERPOS G24-LC manual 10 +CHLD Parameters, Command Response/Action +CHLD=n, Type Test, +Chld=?

Call Control

Note: Only voice calls can be put on HOLD.

Aprecondition for the multi-party service is that the G24-L is in control of one active call and one call on hold. In this situation, the G24-L can request the network to begin the MTPY (Multi Party) service. Once a MTPY call is active, remote parties may be added, disconnected or separated (removed from the MTPY call, but remain connected to the served mobile subscriber).The maximum number of remote parties is 5.

In this command, the term CALL refers to a single or MTPY call.

A single Active call is considered a MTPY call with one call index numbered as 1.

Command			Response/Action
+CHLD=<n>		If the call is terminated:
		OK (approve request was submitted)
		NO CARRIER
		If the call state is changed (link, split, from active to hold, and so on):
		OK (approve request was done)
		If the call is terminated and another call is answered:
		OK (approve request was submitted)
		NO CARRIER
		OK (call answered and is now connected)
Command	Syntax		Response/Action	Remarks
Type
Test	+CHLD=?		+CHLD: (list of supported <n>s)	The Test command returns <n> values
			OK	supported by the G24-L to the terminal

The following table shows the +CHLD parameters.

		Table 3-10: +CHLD Parameters
<Parameter>		Description
<n>	Call hold operation:
	0	- Releases all held calls
	OR
	Sets User Determined User Busy for a waiting call
	1	- Releases all active calls and accepts the held or waiting call
	1x - Release specific call x, where x is the serial number of a call participating in an
	active MTPY call.
	2	- Places all active calls on hold and accepts the held or waiting call
	2x - In the case of an active MTPY call, places all active calls on hold, except for call
	x. Call x remains active.
	3	- Adds a held call to the conversation - MTPY
	Note: "Held calls" or "active calls" means a held or active single or MTPY call. There
		cannot be two or more different held/active single/MTPY calls.

3-24 G24-L AT Commands Reference Manual April 15, 2008