Commands
CSMIM-T1 Hardware Installation Guide 7-31
\Q6 Keeps CTS Off until connection for bi-directional hardware flow
control; ignores RTS until connection.
Sets the type of flow control used on the serial port. If the
serial-port speed is faster than the modem-port speed, data from
your computer enter the modem faster than they leave.
The modem holds characters in a buffer and sends them out at the
slower modem-port bps rate. When the buffer is full, flow control
instructs your computer to stop transmitting data to the modem;
the modem continues to send out the characters and empty the
buffer. When there is room in the buffer, flow control instructs
your computer to resume transmitting data to the modem.
For reliable connections, retransmissions can reduce the effective
modem-port speed. If this occurs, flow control prevents buffer
overflow.
During direct mode connections, the modem does not use flow
control and ignores the \Q setting.
\Q1 enables bi-directional XON/XOFF flow control. Sending an
XOFF character stops data transmission; sending an XON
character restarts it. The modem generates XON and XOFF
characters at the same parity as on the serial port. The serial port
responds to XON and XOFF characters from the local computer
in the same way.
\Q2 enables unidirectional hardware flow control. The modem
turns CTS Off to signal the local computer to stop transmitting
data, and turns CTS On to signal the local computer to resume
transmitting data.
\Q3 sets bi-directional hardware flow control using the CTS and
RTS signals. The modem uses the CTS signal to start and stop
data transmission from the local computer. When RTS is Off, the
modem stops transmitting data to the local computer. When RTS
is On the modem resumes sending data.
NOTE Hardware flow control overrides the &C and \D settings for CTS
operation.