Method and system for location determination in a composite wireless/landline communication system

A location interoperability system comprising:

• a network switch adapted to receive a message indicating a request by an originating device to establish a call to a called party;
• program logic, in the network switch, executable (i) to make a first determination of whether the originating device is a landline device or a wireless device, and (ii) to generate a signaling message including data that specifies, based on the first determination, whether the originating device is a landline device or a wireless device;
• a network platform adapted to receive the signaling message including the data that specifies whether the originating device is a wireless device or a landline device;
• and
• program logic, in the network platform, executable (i) to make a second determination, based on the data, whether the originating device is a landline device or a wireless device, (ii) if the determination is that the originating device is a landline device, then to invoke a landline location-determination process-to determine a location of the originating device, and (iii) if the determination is that the originating device is a wireless device, then to invoke a wireless location-determination process to determine a location of the originating device.