| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a communication terminal device which can eliminate waste when improving the probability of continuation of interactive communications. <P>SOLUTION: When an electronic key 2 has received WAKE signal, it sends ACK signal which is a response signal to the WAKE signal. When the ACK signal is the first ACK signal, the first ACK signal is sent at a standard output level. Then after sending the first ACK signal, the electronic key 2 sends the ACK signal at an output level higher than the standard output level when it has received the WAKE signal. <P>COPYRIGHT: (C)2008,JPO&INPIT |
