ASCOM Ascotel Office 155pro User Manual page 14

Dialling and Phoning
Using a Headset
You want to make phone calls without having to hold the phone.
The headset comprises the headphones, microphone, and a button. To answer and to end calls,
you simply press the button on the headset. Once the headset is plugged in to your handset, the phone's
microphone and loudspeaker are deactivated.
NOTE
14
Answering or ending a call: Press the key.
Adjusting the headphone volume: Press the Volume key on the phone.
Headsets by other manufacturers can cause malfunctions (e.g. automatic
answering).