| 摘要 |
PURPOSE: To transmit the right tone sound corresponding to the key operation of a user when the audio mute at the time of switching a channel synchronizes with the key operation of the user by storing a depressed key in a key buffer and transmitting the tone sound of the stored key after the channel is switched. CONSTITUTION: On and after the reception of a handover instruction, the key depressed by a user is stored in a key buffer and tone sound is not transmitted (step 104). Subsequently, whether SCC-s and PSCC are matched or not is judged (step 105). When they are not matched, the handover instruction is neglected (step 110), the tone of the key stored in the key buffer is transmitted by an original channel (step 111) and the speech state of the original channel is returned (step 112). Next, when they are matched, handover and handin processings are performed (steps 106, 107) and the tone sound of the key stored in the key buffer is transmitted by a new channel (step 108). |
