PBX hunt group revisited

Suppose one group of PBX is used to distribute calls to multiple application servers (voice mail, IVR, gateway, ...). PBX starts the distribution of the calls as soon as interface (E.1/T.1/S0) receives ready.
Now suppose at time interface receives ready application is still not ready to process the calls. This can happens due to multiple reasons: Application is about to start, application is restarted, unexpected termination of application, host OS problem, ... . The precise cause is not important. Most important is the fact that all distributed to this application server calls are lost, and this is in the time other application servers are ready to process the calls.

This problem is resolved by Diva support for Hunt Group. You can use Diva configuration to activate Hunt Group mode. Once active E.1/T.1/S0 interfaces of Diva hardware remains in hight impedance state (from the point of view of PBX it looks same as cable not connected to port) until user application receives ready (as soon as application can not process the calls). PBX distributes the calls to other ports (no calls are distributed to inactive port) and as result no calls are lost.
Once user application receives ready (again) Diva will change to normal operation and activate E.1/T.1/S0 interfaces. PBX will start call distribution to appropriate ports (again).

Diva hunt group support is available for each application which uses Diva CAPI or Diva API. This is no change to application is necessary. Information about the state of application is derived from the behavior of application.

You can get more information in Diva reference manual.