Patent ID: 8295827

Claim:
A method of establishing a signal parameter threshold to switch between communications protocol by a multimode handset, said method comprising: providing a plurality of cordless telephones of different models; determining a dropout point at which a communications signal of each of the cordless telephones deteriorates below a predetermined level; measuring at least one signal parameter value of the communications signal at the determined dropout point of each of the cordless telephones; collecting the at least one signal parameter value of the cordless telephones; identifying a cordless telephone model out of the plurality of cordless telephones of different models having a shortest range at which the associated dropout point is determined; determining the at least one signal parameter value associated with the cordless telephone model having the shortest range; and establishing a multimode cordless handset with the at least one signal parameter value, the multimode cordless handset switching communications protocols during a call in response to the multimode handset crossing a signal parameter threshold level defined by the determined at least one signal parameter value of the cordless telephone model having the shortest range, wherein the switching of communications protocols during the call is facilitated by an application server.