Patent ID: 8306513

Claim:
A method of managing enterprise calls to a mobile device, comprising: beginning to initiate a voice channel from an enterprise network system to a mobile device, at least in part over a wireless network; determining, during establishment of the voice channel, whether a call from an infrastructure component of the wireless network has been received at the enterprise network system, and is attributable to the mobile device; responsively entering a failure mode for the call upon the determination that the call from the infrastructure component of the wireless network has been received at the enterprise network system, such that no DTMF acknowledgment tone need be sent by the mobile device to indicate that it has answered the call; and without the determination, establishing a voice call on the voice channel, wherein the establishing of the voice call comprises connecting the voice channel to a voice channel between the enterprise network system and another device, and if identification information of the calling party is not attributable to the enterprise network, then redirecting the call to voice mail.