I have a customer with 3 ac's, they want callers to recieve ring tone when the operators are all busy on calls. Currentley when all attendants are busy, the calling party recieves music on hold ?
The use of "Queueing" will always look for a MOH file or will play/give silence. You could use the ringback.wav for the MOH in this instance to accomplish this request;
(I try to not second guess customer wishes but it does seem odd that your customer would prefer a "ring no answer" type response over MOH but ......)
This info should be applicable;
Here is a good reference;
Q. How do I make the Music on Hold (MOH) as a ringback tone when using Cisco CallManager with IPCC?
A. When an ICD call rings an agent, the caller is put on hold by the CallManager. At this point, the CallManager MOH can be used to play a ringback tone to the ICD caller while waiting for the Agent to answer the phone. In order to set this up, you need to configure all the CTI ports Network Hold Audio Source as the wav file (ringback.wav) you want to play during the consult transfer.
Note: Make sure that the ringback.wav file is in the CallManager server and configured appropriately.
Hope this helps!