Yealink T48U User Manual

© 1999 – 2023 RingCentral. All rights reserved.
Yealink T4 8U Quick Guide
Deskphone Features
Feature Description
1. 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 keys
Hold key
Headset key
Cancel key
Volume keys
Mute/Unmute key
Transfer key
Speakerphone key
Redial key
Voicemail key

Yealink T48U Specifications

General

Protocol	SIP
Expansion Module Support	Supports up to 3 EXP43 expansion modules
Local Phonebook	1000 entries
SIP Accounts	16
Display	7" 800 x 480-pixel color touch screen
Audio Features	HD voice, full-duplex speakerphone with AEC
Audio Codecs	Opus, G.722, G.711, G.729, G.726, iLBC
Connectivity	Dual-port Gigabit Ethernet
Wi-Fi	Via WF40/WF50 USB dongle (sold separately)
Power over Ethernet (PoE)	IEEE 802.3af, class 3
Network Features	IPv4/IPv6, VLAN, QoS
Ports	2 x Gigabit Ethernet, 1 x USB
Dimensions	266 mm x 226 mm x 185 mm x 54 mm

Summary

Yealink T48U Deskphone Features Overview

Line Keys

Enables selecting a phone line, viewing calls, or calling a favorite contact.

Soft Keys

Enables selection of context-sensitive keys displayed on the screen.

Navigation Keys

Scrolls through information and options on the phone screen.

Cancel Key

Cancels an action or rejects incoming calls.

Volume Keys

Adjusts volume for handset, headset, and speaker.

Headset Key

Enables placing and receiving calls via headset.

Mute/Unmute Key

Mutes audio during calls and conferences.

Hold Key

Holds an active call or resumes a held call.

Voicemail Key

Enables access to voicemail messages.

Transfer Key

Transfers an active call to a contact.

Redial Key

Dials the last called number or extension.

Speakerphone Key

Enables placing/receiving calls using speakerphone.

Basic Call Handling

Placing and Answering Calls

Instructions for initiating and receiving calls using handset, headset, or speakerphone.

Call Hold and Retrieval

Procedures for placing calls on hold and retrieving them.

Conference Calls

Steps to initiate and merge calls for a conference.

Advanced Call Management

Call Transfer Methods

Details on performing warm, blind, and voicemail transfers.

Parking and Retrieving Calls

Methods for parking calls and retrieving them from specific locations.

Specialized Phone Functions

Hot Desking Setup

Instructions for logging in and setting up the phone for hot desking.

Paging and Intercom Calls

Guides for making broadcast pages and direct intercom calls.

Call Recording

Procedures for starting and ending call recordings.