An adapter is disclosed which allows attachment of a standard telephone to a computer as a standard peripheral. The adapter converts analog signals of the telephone to digital signals of the computer and vice versa. The adapter can also be a stand-alone device allowing the telephone to be attached to...http://www.google.co.uk/patents/US7061901?utm_source=gb-gplus-sharePatent US7061901 - Data network and PSTN telephony system
