About Your Phone
Headset
If you will use your handset frequently, we recommended you use a headset so you have both hands free. The headset comes in two versions: microphone integrated in the cable and microphone on a boom.
In order to achieve optimal audio quality with your headset we recommend you select the corresponding headset profile. See the Mitel 5603 Wireless Handset Configuration Guide for more information.
The default setting is microphone on a boom; that is, the audio is optimized for using a headset with microphone on a boom. You can change the headset profile in the menu as follows:
1.Enter the menu by pressing the “Menu” soft key.
2.Select "Settings".
3.Press "Select".
4.Select "Headset".
5.Select the corresponding headset profile from list.
6.Press "Select".
If the
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