| 摘要 |
<p>The method involves detecting a presence or an absence of a voice signal on reception at a level of a receiving equipment, and generating a signal indicating voice on reception. The signal indicating voice on reception from the receiving equipment is transmitted to the emitting equipment. The voice presence on transmission signal is compared with the signal indicating voice on reception in the emitting equipment, and an alarm is triggered if the compared signals are not consistent.</p> |
