INSYS 56k Small INT 2.0, Руководство по эксплуатации

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Functions INSYS Modem 56k small INT 2.0/USB 1.0
22 June 06
5.2.2 Data Buffer for Serial Data Transmission
The modem has a fast send and receive cache (so-called buffer) to
adjust the modem to the operating speed of the application. It is,
however, possible to deactivate this data buffering and switch to
bit direct mode.
When working with buffers, handshake is recommended to
avoid transmission errors.
5.2.3 Bit direct mode
Only for special, non-standard data formats.
In bit direct mode, the modem has no influence on the trans-
mission format. Data is transmitted without buffering.
Data compression or error correction will not work in bit direct
mode. Only the abort sequence - d++ - is utilized by the
modem.
5.2.4 Hardware Data Flow Control with RTS/CTS
Hardware Data Flow Control with the Modem (CTS):
Modem
RS232 Cable
CTS Line
Application
(E.g.: PC or con-
trol)
When the input buffer of the modem exceeds a certain fill state,
the modem will set the CTS line to OFF. This indicates to the ap-
plication not to send any data.
After the modem has operated the input buffer so far that the
XON buffer falls below a certain fill state, it switches the CTS line
back ON and reports to the application that it is ready to receive
data again.
AT\N1
AT&K3 AT&R1