Motorola G24 用户手册

The following table shows the &K parameters.

This parameter determines how the state of the DCD line relates to the detection of the received 
line signal from the distant end. Changing the parameters will take effect immediately in both the 
command and online command states.

The DCD line is an output line that indicates the following:

In Circuit Switch Data mode an active (low) indicates that a valid carrier (data signal) was 
detected by the G24 (CONNECT message is received), and inactive (high) indicates idle. 
The AT&C command always puts the DCD command ON, when set to 0. If the AT&C 
command is set to 1 then the "+++" escape command sets the DCD signal to an inactive state 
and the ATO command is set to active. The AT&C set to 2 sets the DCD signal OFF. 

In GPRS mode, the DCD line indicates the PDP context status. PDP context active sets the 
DCD to active (low); PDP context inactive sets the DCD to inactive (high). The DCD is 
activated only when the PDP context is achieved. The DCD is de-activated when the PDP 
context is off.

In Local Link mode, the DCD line indicates the Local Link data status.

When AT&C is set to 0, the DCD signal is always ON.

When AT&C is set to 1:

• DCD signal is set to ON when +MDLC command has been launched.

• DCD signal is set to OFF when Local link has been stopped.

When AT&C is set to 2, the DCD signal is always OFF.

0

Disable all terminal/G24 flow control

3

Enable CTS/RTS terminal/G24 flow control

4

Enable Xon/Xoff terminal/G24 flow control

5

Enable Xon/Xoff terminal/G24 flow control

6

Enable CTS/RTS terminal/G24 flow control

The default value is 3.