A switch device adapted to interface an incoming telephone line and an internal telephone system comprising a telephone, a facsimile machine, and an auxiliary device such as a modem, answering machine, or another telephone. The switch device automatically receives and answers incoming communications...http://www.google.fr/patents/US5056132?utm_source=gb-gplus-shareBrevet US5056132 - Switch device adapted to interface between an incoming telephone line and an internal telephone system
Switch device adapted to interface between an incoming telephone line and an ...
