A multi-station telephone system having a telephone control module (24) based user site network is provided. The system includes a plurality of electronic devices (26) located at a user site (12). A site telephone line (20) is coupled to a telephone line (16) provided by a telephone network (10)...http://www.google.fr/patents/US5809111?utm_source=gb-gplus-shareBrevet US5809111 - Telephone control module and user site network and methods of operation
Telephone control module and user site network and methods of operation
