Methods of learning the characteristics of a telephone

Abstract From the Canadian patent

The present invention overcomes interface problems between proprietary handset ports, on telephone base units and voice/data accessory products by allowing a user to, automatically calibrate the telephone accessory product for an optimal interface match, with the intended telephone base unit. This is accomplished through the use of a "Smart, Interface Technology" (SIT) integrated chip set consisting of a full custom analog and, semi-custom digital integrated circuit. The SIT incorporates methods for "learning" the, characteristics of 4-wire port modular interfaces found in all telephone station sets by, determining the appropriate 4-wire terminal configurations the transmit and , …