There is no audio on the headset   If there is no audio on your headset, the connections may not be correct. Do one of the following:   • Ensure the headset is plugged into the jack marked Headset at the side of the phone. • Ensure the headset amplifier (if present) is turned on and/or adjust the volume). If the amplifier uses batteries, ensure they are fully charged. • Ensure that you have not picked up the handset.   There are audio or echo issues   If you experience echo issues:   • Press the Menu key, then select Settings > Basic > Preferences > Headset > Echo Cancellation. • Using the arrow keys, select Enabled, and then press the Select soft key. • Contact your system administrator or telephony provider.