Patent ID: 6574468
Filing Date: 2003-06-03
Classification: H04M,H04Q

Abstract:
A calling number delivery system for delivering calling number information via a radio channel between a base station connected to an exchange and a plurality of subscriber's stations, the base station comprising:ringer detecting means for detecting a ringer when a call sent from the exchange via a first analog line is received; calling number information extracting means for detecting calling number information in an FSK modulation signal transmitted via the first analog line and extracting the calling number information from the FSK modulated signal; and information transferring means for transferring the calling number information and ringer information to the subscriber's station over a control channel in the radio channel, and the subscriber's station comprising: information receiving means for receiving the ringer information and the calling number information transferred from the base station over the control channel in the radio channel; ringer generating means for extracting the ringer information from the information receiving means and generating a ringer; FSK modulating means for extracting the calling number information from the information receiving means and FSK modulating the calling number information; and selective transmitting means for performing switching between the FSK modulated calling number information and the ringer and selectively transmitting the switched information to the telephone via a second analog line.