Automatic detection of phone system settings for dial-up modem connections

US6546091B1 · kind B1 · utility

Assignee

• Thomson Licensing · FR

Inventors

• Keith Reynolds Wehmeyer · Fishers, US
• Daniel Robert Crupi · Noblesville, US
• Hugh Boyd Morrison · Marion, US

Key dates

• Filing date: Aug 28, 1998
• Grant date: Apr 8, 2003
• Expiry date: Aug 28, 2018

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04M3/428
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A method and apparatus for automatically establishing a data connection includes a telephone line interface circuit coupled to a subscriber telephone line, and a modulator and demodulator circuit coupled to the telephone line interface circuit. A control circuit is coupled to the modulator and demodulator circuit and conditions the modulator and demodulator circuit to establish a connection to the subscriber telephone line and comprises circuitry to determine whether a central office to which the subscriber telephone line is connected is a tone-dial central office or a pulse-dial-only central office, whether a dialing prefix is necessary to access the subscriber telephone line, and whether the call waiting feature is activated on the subscriber telephone line.