[asterisk-users] how to limit the calls leaving a queue?

[Niccolò Belli]

Hi,
I explain what I want to do..
All the operators share their phones. The number of the operator isn't
constant, so it's possible that two operators share all the phones.
They need to move all around, so they pick up the first phone they find.
If there are only few operator is very annoying for them to ear the
other phones ringing while they are at the phone!
So I'dd like to limit the maximum number of simultaneous calls leaving
the queue, but how to do it?