5Your Telephone’s ControlsYour Telephone’s ControlsUse the Volume Control Bar to control thevolume of the handset, headset, speaker,ringer, and handsfree. Increase the volumeby pressing the right side of the bar. Lowerit by pressing the left side./ You can terminate an active call bypressing the Goodbye Key. The GoodbyeKey is useful for disconnecting a handsfreecall./ Press the Headset Key to answer a call ona headset (connected to the headset jack)or to switch a call from handset orhandsfree to the headset.A steady LCD indicator appearing besidea Line (DN) Key means that the feature orline is active. A flashing LCD indicatormeans the line is on hold or the feature isbeing programmed./ By pressing the Hold Key, you can put anactive call on hold. Return to the caller bypressing the DN Key beside the flashingindicator.The Handsfree Key allows you to activatethe handsfree (M3902, M3903, andM3904) and Group listening features(M3903 and M3904). The speaker LEDlights to indicate handsfree is active, theLED flashes to indicate Group listening isactive./ The Mute Key allows you to listen to aconversation without being heard. This isespecially useful when you only want tolisten on a conference call. Push the MuteKey again to return to a two wayconversation. The Mute Key applies tohandsfree, handset, and headsetmicrophones. The Mute LED flashes whenthe Mute option is in use.GoodbyeHeadset2498HoldMute
