[asterisk-users] how to detect dtmf in meetme

[Steve Edwards]

Date: Fri, 29 May 2009 14:27:16 +0800
From: robert <aofeisheng at 163.com>

Date: Fri, 29 May 2009 14:28:43 +0800
From: robert <aofeisheng at 163.com>

Impatient?

On Fri, 29 May 2009, robert wrote:

> i want to kick participant in a meeting by pressing the digit on sip 
> phone.when i entry the meeting ,no matter how i press the button,the 
> dtmf does not work.
>
> here is my dialplan and my agi script,and sip.conf

> [from-internal]

[snip]

> exten =>121,4,MeetMe(900,MDbF)

Is your AGI named "conf-background.agi?" (Personally, I think setting 
MEETME_AGI_BACKGROUND is a better idea.)

> #!/usr/bin/php -q

[snip]

> print "get_data('demo-welcome', 15, 5)\"\"\n";

This is not the proper format for an AGI request.

The request should look more like:

 	get data demo-congrats 15 5

> $agivars = (fgets(STDIN));

The response will look like:

 	200 result=1 (timeout)

or

 	200 result= (timeout)

or even

 	200 result=

It's a text string that you need to parse, not a single digit.

> print "MeetMeAdmin(900,k,$agivars)\"\"\n";

"Meetmeadmin" is not a AGI command and even if it was, the syntax is 
wrong.

> print "set extension 121\"\"\n";
> print "set priority 5\"\"\n";

This violates the AGI protocol.

You will save yourself a lot of time and hair if you use an established 
AGI library.

Keep in mind that when the AGI exits, you exit the meetme. Also, the "b" 
option overrides the "p" and "X" options.

Another "gotcha" -- the "user" number you pass to meetmeadmin is not "the 
nth user in the conference" its "the nth user who has joined the 
conference."

Let's suppose you have a long running conference. You join and are user 1. 
I join and am user 2. You leave and come back. You are now user 3. This 
becomes more meaningful as hundreds of users join and leave the 
conference. Thus, in a conference you could have users 1, 55, and 999.

I recently solved this for a client by writing an AGI that connected to 
Asterisk via AMI to parse the output of "meetme list <conf-name>" so the 
admin could mute/unmute/kill the users by index instead of user number.

Thanks in advance,
------------------------------------------------------------------------
Steve Edwards      sedwards at sedwards.com      Voice: +1-760-468-3867 PST
Newline                                             Fax: +1-760-731-3000