When a public switched telephone network (PSTN) subscriber (28) is occupying their telephone link to connect a personal computer to a computer network, the method provides automatic redirection of an incoming call to said telephone link to a subscriber proxy (38) connected to the PSTN (30) for producing...http://www.google.com/patents/US6463146?utm_source=gb-gplus-sharePatent US6463146 - Call waiting service in a telecommunications network
