Patent ID: 8190201

Claim:
A telephony method for implementation on a mobile device, comprising: receiving an incoming voice call over a voice channel on the mobile device; answering the voice call; sending, from the mobile device, a verification code comprising a series of audible tones, when identifying information for the voice call being received is unavailable to the mobile device; proceeding with the voice call responsive to receiving, at the mobile device, a reply verification code over the voice channel within a time limit; sending, from the mobile device, over a data channel, an indication to establish the voice call to a called party device, and waiting to receive a confirmation of reception of the indication from an enterprise communications server; beginning a timeout period, during which receiving of the incoming voice call over the voice channel on the mobile device occurs, or indicating on a user interface of the mobile that the voice call to the called party device has failed, occurs; and conditioning the beginning of the timeout period on reception of a confirmation, over the data channel, that the indication was received, and in the absence of such confirmation over the data channel, proceeding to indicate that the voice call to the called party device has failed.