Importance

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Abstract

A method for rerouting calls in a call-routing system having a routing processor storing information about the status of remote telephone stations involves setting a semaphore for station busy at the time a call is routed to the station, and timing the semaphore for a pre-programmed period of time known to be the latency period for returning a real-time signal that the routed call was actually completed. If the signal for call completion is not received in the pre-programmed time, the call is canceled and re-routed by reinserting the call in a routing queue. When the call is canceled the semaphore is reset to indicate the station is not busy. In a preferred embodiment the call is rerouted to the same destination as originally routed.

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First Claim