Yealink T48S / T48U - Quick Start Guide

Yealink T48S / T48U - Quick Start Guide

Your Yealink T48U phone is a cost‐effective, high‑performance IP phone designed for streamlined communication. This quick start guide will help you quickly get acquainted with the essential features and operations of your phone.
 
No. Item / Key Description
1 Power LED indicator Indicates call status, message status, and overall phone/system status.
2 Touch Screen • Tap to select and navigate on the capacitive display.
• Shows call info, messages, time/date, and other data.
3 HEADSET key Toggles headset mode. LED glows green when enabled.
4 MUTE key Toggles mute. LED glows red when the call is muted.
5 HOLD key Places an active call on hold or resumes a held call.
6 TRANSFER key Transfers the current call to another party.
7 Speakerphone key Toggles hands-free mode. LED glows green when speakerphone is active.
8 MESSAGE key Opens voicemail.
9 REDIAL key Redials the last dialed number.
10 Navigation / OK / Cancel keys • Navigation ring – scroll through on-screen options; left/right shortcuts to History and Directory.
• OK key – confirms actions / answers calls.
• Cancel key – cancels actions / rejects calls.
11 Volume key Adjusts handset, headset, or speaker volume (context-sensitive).
12 Keypad Standard 0–9, *, #, and special characters for dialing or data entry.
13 Speaker Provides ringer output and hands-free audio.
14 Reversible tab Secures the handset when the phone is wall-mounted. (See Yealink Wall Mount Quick Installation Guide for adjustment.)
15 Hookswitch • Lifts (handset off-hook) to connect to the line.• Rests (handset on-hook) to disconnect the line.



Key Features and Functions

Softkeys

  • The T48U provides four softkeys: Call Log, Directory, DND, and Menu.
  • Use the History key to review recent calls and the Directory key to access your contacts.
  • The DND softkey toggles Do Not Disturb, while the Menu softkey provides access to additional settings.

Dedicated Physical Keys

  • Handset, Speaker, and Headset keys for audio control.
  • A dedicated Redial key for call redial.
  • A dedicated Headset key for answering a call with your headset.
  • A dedicated Voicemail key to access your voice messages.
  • A physical Mute key to silence your microphone during calls.
  • Use the directional (up/down/left/right) keys to scroll through menus and lists.
  • Press the central OK key to select items.

Basic Operations

Placing a Call

  1. Dial the number using the physical keypad.
  2. Pick up the handset for a regular call or press the Hands‑free key for speakerphone mode.
  3. To use a specific SIP line, press the corresponding physical line key before dialing.

Answering a Call

  • Pick up the handset to answer an incoming call.
  • For hands‑free operation, press the Hands‑free key or the Headset key if using a headset.

Dialing from Directories

  1. Press the Directory softkey to open your contacts.
  2. Scroll through the list using the navigation keys.
  3. Select a contact and press OK to dial.

Dialing from Recent Calls

  1. Press the History softkey to view recent calls.
  2. Select a call record and press OK to redial.

Placing a Call on Hold

  • During an active call, press the Hold softkey to put the call on hold.
  • Press the Resume softkey to retrieve the call.

Transferring a Call

  • For a Blind Transfer, press the Transfer softkey, dial the target number and press the B Transfer softkey.
  • For an Attended Transfer, press the Transfer softkey, dial the number of the recipient, once the recipient answers, press the Transfer key to merge the calls.

Muting a Call

  • Press the dedicated Mute key during a call to silence your microphone; press it again to unmute.

Listening to Voice Messages

  1. Press the Menu softkey and select the Message option, or dial *97, or press the dedicated Voicemail key.
  2. Enter your passcode when prompted, then press #.
  3. Follow the voice prompts to listen to or manage your messages.

3‑Way Conferencing

  1. Place the first call.
  2. Press the Conference softkey to initiate a conference call and dial the next number.
  3. The active call is automatically placed on hold.
  4. Press the Conference key again to merge the calls.
  5. To exit the conference while keeping others connected, press the End Call option.

Forwarding Calls

  • Press the Menu softkey, select Features, and select the Call Forward option.
  • Select the desired forwarding type (Unconditional, On Busy, or No Answer), enter the forwarding number, and press Enable.
  • To disable call forwarding, re-access the Call Forward option and select Disable.

Call Park / Call Retrieve

  • If enabled by your system, press the designated Park key to park a call.
  • To retrieve a parked call, press the corresponding Line key that indicates a parked call.