[Asterisk-Users] How to limit asterisk to use only three channels

[Senad Jordanovic]

asterisk-users-admin at lists.digium.com wrote:
> Hi,
> 
> The incomming call is coming, asterisk answers.
> So far 1 sip channel is used. The person who is calling choses either
> 1 or 2 and asterisk uses second channel to make a phone call.
> If everything is ok two parties are talking to each other.
> 
> Now, the third person is calling, and all I want is let that person
> know that all lines are busy etc. Here the third channel is used.
> I have to limit that person so he or she willl not be able to press 1
> or 2 because there are already 2 channels (3 with the third person)
> used. 
> My bandwith is limited only to 3 channels.
> 
> Any ideas,

Use application "CheckGroup" together with "SetGroup".
first you SetGroup to a $VAR then you use CheckGroup($VAR)

Ta
SJ