Mitel 5603 用户手册

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页码 68
Making and Answering Calls
17
The 
 icon indicates a silenced microphone. This means that the other part in an ongoing 
call cannot hear you. To turn the microphone back on, do as follows: 
1.
Press the "More" soft key during the call.
2.
Select "Microphone on".
3.
Press "Select".
You can to turn the microphone off/on by a long press on 
Start a New Call during Conversation
1.
Press the "More" soft key during the call. 
2.
Select "New Call"
1
3.
Press "Select".
4.
Enter number, or press
 to access the phonebook.
5.
Press .
1. Visible if defined in the PDM.