Reject Calls when no availibility

[iker.ma]

Hello Community
i have a special request from a customer and its driving me crazy, my customer wants to decline incoming calls when all agents are talking and by declining i mean sending bussy or rejected signal, something like disabling the queue when no agent are free, he has a Callflow that sends us calls and when a call get rejected it starts seinding the calls to another number, i tried CFD but onece the call is accepted it cant be rejected
is there a way to reject the a call before it achive the queue when no agents are free ?

Thanks

 

[serious1]

Have not worked 3cx queues but on an old pbx, we rang x times in the queue then dir a forward no answer to an extension that was set to ring busy any time it was called. in 3CX could try extension for end call since hanging up is an option. (and I hate those places, usually with long long IVRs that are not helpful - then give you the boot,)

Ours was a bug in the O/S where a queue call would get stuck and never reach an available agent. Vendor suspected something about hitting many dtmf tones while holding and corrected next release.