Справочник Пользователя для Motorola G24

This command sets the CTS pin of the RS232 to active high, waits one second and then returns 
the CTS to active low.

This command configures the flow control. The RTS (Request To Send) is an input line. The RTS 
signal is received from the terminal and a low condition indicates that the G24 can send more 
data. The CTS (Clear To Send) is an output line. The CTS signal is sent to the terminal and a low 
state indicates that more data can be sent to the G24.

The RTS and CTS together make up what is called RTS/CTS or “hardware” flow control. Both 
lines are used when “hardware flow control” is enabled in both the terminal and the G24 devices. 
When the terminal is ready and able to receive data, it puts the RTS line in an active (low) 
condition to indicate this to the G24. If the terminal is not able to receive data (typically because 
its receive buffer is almost full), it puts the RTS line in an inactive (high) condition as a signal to 
the G24 to stop sending data. When the terminal is ready to receive more data (for example, after 
data has been removed from its receive buffer), it places this line back in the active condition. The 
RTS line complements the CTS line. The G24 puts the CTS line in an active condition to tell the 
terminal that it is ready to receive the data. Likewise, if the G24 is unable to receive data, it places 
the CTS line in an inactive condition.