Queue keeps ringing extension which is on a call

I have the following issue: when there is incoming call in a queue it rings all registered extensions for this queue regardless if they are on a call or not. For example if there is an incoming call you accept it and if there is second call it will ring you again not considering that you are in a call at the moment. I want when all extensions are busy from the certain queue the caller to be moved to the next queue as it is setup but not wait for the time out.

I use Trixbox 2.2

Can someone help me with this?

Thanks in advance

disable callwaiting on the extension.

Philippe Lindheimer - FreePBX Project Lead
http//freepbx.org - IRC #freepbx