Method of providing cellular and landline cordless service using a dual mode mobile telephone

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS General Description of System Operation The preferred embodiment of the wireless communication system of the present invention, as illustrated in FIGS.
1 and 2, comprises a cordless cellular base station 10.
The cordless cellular base station is capable of communicating with a cellular network compatible mobile station 12.
The cordless cellular base station 10, algor referred to as a limited or selective access base station, is connected to a landline 14 on a public switched telephone network (PSTN) 15 and is assigned a landline identification number (LLN) or telephone number.
Further, the cordless cellular base station 10 is assigned an electronic serial number at the time of manufacture for identification purposes.
The electronic serial number is generally stored in permanent memory in the cordless cellular base station so the serial number cannot be tampered with by unauthorized personnel.
The mobile station 12 is registered with a cellular network 16 and is assigned a mobile station identification number (MIN) which is the telephone number of the mobile station.
Further, the mobile station, at the time of manufacture, is assigned an electronic serial number (ESN).
The ESN is generally stored in the permanent memory, in the mobile station.
As is known to those of skill in the art, the cellular network 16 is connected to the public switched telephone network to route calls to/from callers on the cellular network 16 from/to callers on the public switched telephone network (PSTN) 15.
The mobile stations 12 are capable of communicating with both cellular base stations 18 on the cellular network 16 and with cordless cellular base stations 10.
When a mobile station 12 is communicating with the cellular network 16, it is referred to as being in regional cellular service mode.
When a mobile station 12 is communicating with the cordless cellular base station 10, it is referred to as being in cordless telephone landline service mode.
When a mobile station 12 comes within range of a cordless cellular base station 10 with which it has previously registered, as described in more detail below and in accordance with the preferred embodiment, the mobile station 12 automatically switches from the regional cellular service mode to the cordless telephone landline service mode without user intervention