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Handset and loudspeaker volume

Use the Volume keys to adjust the volume of the handset or loudspeaker during a call. Adjust the handset listening volume when the handset is off hook. Adjust the loudspeaker volume when dial tone is heard via the loudspeaker, or during a handsfree call.

Press to change the volume.

The handset and loudspeaker volume level is stored.

To adjust the volume during Group Listening:

Replace the handset.

Press to change the volume.

The handset and loudspeaker volume level is stored.

Lift the handset and press.

Dialog 4223 Professional/Dialog 4225 Vision

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Aastra Telecom 4223, 4225 manual Handset and loudspeaker volume, Press to change the volume, Lift the handset and press