Patent ID: 7133516
Filing Date: 2006-11-07
Classification: H04M

Abstract:
1. A method of preventing circular call forwarding loops for a communications unit capable of operating in a first network and a second network within a loosely coupled network, and respectively having a first network number and a second network number, as well as a first network voice mail, the method comprising: receiving a call directed to the first network number of the communications unit; adding first loop indicia to caller identification data in the call; storing first identification data corresponding to the call upon determining that the communications unit is not operating in the first network; forwarding the call to the second network number of the communications unit; receiving another call having second identification data for the communications unit subsequent to the forwarding of a call to the second network number of the communications unit; checking for other loop indicia corresponding to another call; comparing the other loop indicia corresponding to the another call with the loop indicia added to the call and the second identification data with the first identification data; and forwarding the call to the first network voice mail of the communications unit when the comparing the other loop indicia corresponding to the another call with the loop indicia added to the call and the second identification data with the first identification data indicates a call forwarding loop.