Subscriber's interface enabling the connection of otherwise incompatible telephone device systems (hereinafter "(Z)") to a single telephone line, each telephone device system having devices such as: a computer modem (hereinafter "(F)"), an automatic answering machine (hereinafter "(A)"), and telephone...http://www.google.de/patents/US5036534?utm_source=gb-gplus-sharePatent US5036534 - Intelligent telephone interface for automatic answering systems, and method of using
