Terminal adapter, switching equipment ancillary device and data communication system
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United States of America Patent
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-
Feb 24, 1998
Grant Date -
N/A
app pub date -
Sep 18, 1995
filing date -
Sep 20, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Each of a terminal adapter and a switching equipment ancillary device has a protocol controller for analyzing and controlling a communication protocol control signal transmitted from a data terminal, so that a modem interface can directly be set to an originate mode or an answer mode. As a mobile station has no modem function, the switching equipment ancillary device and a modem terminal are synchronized with each other by a clock signal, and transmit and receive data therebetween. A transmission delay caused by a retransmission effected under error correction control on a communication line is adjusted by flow control between the modem interface and the modem terminal.
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