Motorola G24 ユーザーズマニュアル

Certain actions performed in the G24 UI by the user are transmitted to all attached accessories, 
primarily as a notification of a change in state. For example, notification of a phone-book storage, 
recall operation or setting a call restriction level. These messages are required by certain 
accessories to maintain local information, or to provide additional information on an auxiliary 
display.

This unsolicited message is sent when local key press echo is enabled (as described in 

) and a key is pressed on the G24 keypad. The 

identity of the key is broadcast to all the accessories, as well as information about whether the key 
was pressed or released. This command can be configured to send key presses from the G24 
keypad only, or from other accessories as well.

When the phone is locked and a digit or a softkey is pressed, the "@" character is used in the 
message event instead of the actual key being pressed. This prevents passwords or codes entered 
by the user being monitored or stolen by attached accessories (for example, Bluetooth devices). 

The following table shows the +CKEV parameters.

Key that changed state 

0

Key released 

1

Key pressed