6 Model 57i IP Phone Installation GuideKey Descriptions Key DescriptionsKeys Key DescriptionGoodbye key - Ends an active call. The Goodbyekey also exits an open list, such as the Options List,without saving changes.Options key - Accesses options to customize yourphone. Your System Administrator may havealready customized some of your settings. Checkwith your System Administrator before changingthe administrator-only options.Hold key - Places an active call on hold. To retrievea held call, press the call appearance button besidethe light that is flashing.Redial key - Redials up to 100 previously dialednumbers. Pressing the Redial key twicesimultaneously redials the last dialed number.Volume control key - Adjusts the volume for thehandset, headset, ringer, and handsfree speaker.See "Adjusting the Volume" on page 21 for moreinformation.Line/Call Appearance key - Connects you to a lineor call. The Aastra 57i IP phone supports up to 4line keys.Handsfree key - Activates Handsfree for makingand receiving calls without lifting the handset.When the audio mode option is set, this key is usedto switch between a headset and the handsfreespeakerphone. See "Customizing your Telephone"on page 15 for more information.Mute key - Mutes the microphone so that yourcaller cannot hear you (the light indicator flasheswhen the microphone is on mute).