| 摘要 |
<p>PROBLEM TO BE SOLVED: To re-synchronize a password even if password step-out occurs and to resume a password call without terminating the call by permitting a transmission side terminal to consider step-out to be password step-out and setting the transmission of synchronous pattern data in a reception terminal to be a password synchronous pattern re-transmission processing for re-synchronizing the password. SOLUTION: A transmission side terminal considers step-out to be password step-out and the transmission of synchronous pattern data in a reception terminal is a password synchronous pattern re-transmission processing for re- synchronizing a password. On a transmission side, a sound frame synchronism part 6 detects step-out, and a step-out detection signal 14 is outputted to a sound encoding part 1 and a password re-synchronism waiting timer 8 from the sound frame synchronism part 6 by the occurrence of equivalent password step-out and step-out is informed. When password step-out is recognized and the re-transmission processing of a password synchronous pattern for password re-synchronism is executed on a reception side, the reception side outputs password pattern data to a communication line 7 instead of sound encoding data which is transmitted till then.</p> |
