Mitel 5603 Benutzerhandbuch

Adjust the Volume during a Call

On the navigation key, press 

 and 

 to increase and decrease the volume, respectively. 

The handset will now store and keep the new volume level.

Open Contacts during the Call

Press the "More" soft key during the call.

Select "Contacts".

Press "Select".

Select "Call contact" for searching  a local or company phonebook contact, or select "Central 
phonebook" for searching a central phonebook contact.

Press "Select".

Select or search contact.

Turn the Microphone on/off during a Call

Press the "More" soft key during the call

Select "Microphone off"

Press "Select".

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: 

Press the "More" soft key during the call.

Select "Microphone on".

Press "Select".

You can to turn the microphone off/on by a long press on 

. 

Start a New Call during Conversation

Press the "More" soft key during the call. 

Select "New Call"

1

. 

Press "Select".

Enter number, or press

 to access the phonebook.

Press .

Note: You can call the selected contact by pressing "Call". When calling the contact, 
the first call will be put on hold. See also “Start a New Call during Conversation” on 
page 16.

1. Visible if defined in the PDM.