© 1999 – 2023 RingCentral. All rights reserved.Yealink T48U Quick GuideDeskphone FeaturesFeature Description1. Line keys—enables you to select a phone line, view calls on a line, or quickly call a favorite contact.2. Soft keys— enables you to select context-sensitive keys that display along the bottom of the screen.3. Navigation keys—scrolls through information and options displayed on the phone screen.4. Cancel key—cancels action or rejects incoming calls.5. Volume keys—adjusts the volume of the handset, headset, and speaker.6. Headset key—enables you to place and receive calls through a headset.7. Mute/Unmute key—mutes audio during calls and conferences.8. Hold key—holds an active call or resumes a held call.9. Voicemail key—enables you to access voicemail messages.10. Transfer key—transfer an active call to a contact.11. Redial key— enables you to dial the last called number or extension.12. Speakerphone key—enables you to place and receive calls using the speakerphone.Navigation keysHold keyHeadset keyCancel keyVolume keysMute/Unmute keyTransfer keySpeakerphone keyRedial keyVoicemail key