Automatic synchronous/asynchronous modem
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United States of America Patent
Stats
-
Dec 22, 1987
Grant Date -
N/A
app pub date -
Jul 3, 1986
filing date -
Jul 3, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There is disclosed an arrangement which enables a single modem port to be used for either synchronous or asynchronous data transmission, with no manual changes required. The modem determines whether the incoming call is synchronous or asynchronous by detecting the presence (or absence) of SYNC characters in the data stream immediately after handshaking. Once a determination has been made, the modem options itself accordingly for synchronous or asynchronous data handling. This arrangement eliminates the need for separate central office lines for synchronous and asynchronous data applications.
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