Using a Headset 89■ If the handset is off hook, press the System Appearance button besidethe flashing light.2 To end a call when you are using a headset:■ On a 3Com Basic Telephone or an analog telephone, hang up thehandset or press Feature +111.Returning to theHeadset After aLong DelayCertain brands of headsets enter a power-saving mode that prevents thetelephone from ringing for one or more calls when both of thesecircumstances are true:■ The headset amplifier buttons for Mute and On are both set to On.■ The handset is off the phone for a long time (for instance, overnight).It may take a few minutes for your headset to return from thepower-saving mode to the active mode when calls first come in, so yourtelephone may not ring until the headset has returned to active mode,and you may miss a call.If you plan to not use the headset for a long time (for instance,overnight), 3Com recommends that you set the mute and headsetbuttons on the amplifier to Off and hang up the handset on yourtelephone. When you are ready to receive calls again, set up the headsetfor receiving calls:1 Pick up the handset on your telephone and set it on your desk.2 Put on the headset. On the amplifier, set the headset button to On.