Yealink T54W Mode D'emploi page 24

Volume Adjustment
Press during a call to adjust the receiver volume of the handset/speakerphone/headset.
Press when the phone is idle or ringing to adjust the ringer volume.
Press to adjust the media volume in the corresponding screen.
Ring Tones
1. Press the Menu soft key when the phone is idle, and then select Basic
2.
Press or
3.
Press or
4. Press the Save soft key to accept the change.
to select Common or the desired account and then press the Enter soft key.
to select the desired ring tone.
Sound Ring Tones.
6