Patents Examined by Ahmad F. Martar
  • Patent number: 5003582
    Abstract: The method of adjusting the end of transmission in a data transmission system between a transmitting Data Terminal Equipment (DTE) and a receiving DTE connected respectively by means of a transmitting modem and a receiving modem linked therebetween by a telephone line, consisting in transmitting by the transmitting modem an End sequence of predetermined duration immediately after the data message and just preceding the signal energy drop, and composed of bits of the same polarity. The transmission of the End sequence by the transmitting modem is started as soon as the data message from the transmitting DTE includes an uninterrupted sequence of bits of the same polarity, the End sequence being completed by modem with bits of the same polarity until the predetermined duration, after a request signal for transmitting from the transmitting DTE has turned off.
    Type: Grant
    Filed: January 22, 1990
    Date of Patent: March 26, 1991
    Assignee: International Business Machines Corporation
    Inventor: Francis Maddens