Yealink T4 Series IP Phones User Guide16NO. Item DescriptionTRANSFER Key Transfers a call.Only the SIP-T46S/T46G IP phone has TRANSFER key.6 Speakerphone KeyToggles the speakerphone (hands-free) mode or not. The LED indicator glows greenwhen the speakerphone is activated.The SIP-T40P/T40G IP phone does not have key light.7 Volume Key Adjust the volume of handset, headset, speaker, ringer, or media.8 Keypad Keys Allow you to enter numbers, letters, and special characters. If a menu item has an indexnumber, you can use the keypad keys to select the item.9Navigation Keys • Scroll through information or options displayed on the screen.• Access History and Directory respectively.OK Key Confirms actions or answers incoming calls.Cancel Key Cancels actions or rejects incoming calls.10 Soft Keys Access the function displayed on the screen above the soft keys. The soft keys changedepending on what you are doing at the time.11 Speaker Provides ringer and speakerphone audio output.12 Reversible TabSecures the handset in the handset cradle when the IP phone is mounted vertically. Formore information on how to adjust the reversible tab, refer toYealink Wall MountQuick Installation Guide for Yealink IP Phones.13 Hookswitch Connects or disconnects the phone from the phone line. The hookswitch is auto-matically activated when a user lifts the handset from the cradle to get a dial tone.Power LED IndicatorLED Status DescriptionSolid red The phone is initializing.Fast-flashing red (300ms) The phone is ringing.Slow-flashing red (1s) The phone receives a voice mail or text message.Solid red for 500ms and off for 3000ms alternately. The phone enters power-saving mode.It is only available on the SIP-T48S/T48G/T46S/T46G IP phone.NoteThe above introduces the default LED status. Your system administrator can configure the status of the power LED indicator.Line Key LEDBy default, the line keys are associated with the phone lines. You can set line keys as phone feature keys, and press linekeys to access the configured phone features.Line key LED (default)