Toshiba V.90 Manual De Usuario

56

Flow control is performed by sending XON and XOFF control 
codes in the data stream. The XOFF code makes a transmission 
halt request. The XON code makes a transmission restart request.

Since these two codes, XON and XOFF, are used as flow control 
characters, binary data that includes these two codes cannot be 
transmitted or received. 

Flow control is performed by turning on and off the control lines 
CTS (clear to send) and RTS (request to send) between the 
modem and the computer. A transmission halt or restart request is 
made from the modem to the computer using the CTS signal.

A transmission halt or restart request is made from the personal 
computer to the modem using the RTS signal.

Select flow control between the modem and computer (serial port) 
as follows:

❖

When CTS/RTS flow control is supported by the 
communication software

\Q3, &K3 Communication in reliable mode or normal mode

❖

When XON/OFF flow control is only supported by the 
communication software

 \Q1, &K4 Communication in reliable mode or normal mode

For details, refer to 

.

Modem port flow control refers to flow control between the 
modems of the local station and remote station.