Commands

\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.

NOTE

Hardware flow control overrides the &C and \D settings for CTS operation.

\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.

CSMIM-T1 Hardware Installation Guide

7-31

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Cabletron Systems CSMIM-T1 manual Modem continues to send out the characters and empty, Overflow