Vicidial : Call Reject : No Agent

Currently, we have implemented the use of DID (Direct Inward Dialing) and in-group routing for managing all inbound calls. However, we encounter situations where no agents are available to handle a call, resulting in the call being placed on hold. To enhance our system, I am seeking a solution that allows for immediate rejection of calls when all agents are busy or unavailable, similar to the behavior when a carrier is offline. I would appreciate your assistance in achieving this goal. Please refrain from suggesting the "No Agent No Queue" approach.