Method and apparatus for automatically recognizing a modem type of a modem connected to terminal equipment and for automatically adapting the terminal equipment to the recognized modem type

US5926506A · kind A · utility

Assignee

• Francotyp-Postalia GmbH · DE

Inventors

• Arndt Berthold · Berlin, DE
• Andreas Wagner · Eppelheim, DE

Key dates

• Filing date: Nov 12, 1996
• Grant date: Jul 20, 1999
• Expiry date: Nov 12, 2016

Classification

• Technology area (CPC G): Physics
• CPC primary: G07B2017/00322
• WIPO field: Control
• WIPO sector: Instruments

Abstract

In a method and terminal apparatus for automatic modem type recognition and adaptation thereto within a communication mode, a microprocessor in a control unit of the terminal apparatus, is programmed to enter into a communication mode with a remote central data station in order to enter into a modem preselect value setting mode. The control unit is programmed so that the communication mode is exited after an automatic setup of the communication and after the execution of the communication. For automatic modem type recognition, modem-specific transmission sequences are stored in a program memory or in a modem initialization memory contained in a non-volatile memory of the terminal apparatus and are transmitted successively to the associated modem in steps, and the modem transmits its modem-specific response (transmission sequence) back to the microprocessor. The microprocessor then executes, in steps, a comparison of the response signals with the stored response signals for automatic modem type recognition. The recognized modem type is stored in non-volatile fashion in a modem detect memory. The microprocessor is programmed to execute a step to skip the recognition procedure if corr…