Yealink Yealink SIP-T48G User manual

Copyright © 2016 YEALINK(XIAMEN) NETWORK TECHNOLOGY CO., LTD
Copyright © 2016 Yealink(Xiamen) Network Technology CO., LTD. All rights reserved. No parts of
this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, photocopying, recording, or otherwise, for any purpose, without the express written
permission of Yealink(Xiamen) Network Technology CO., LTD. Under the law, reproducing
includes translating into another language or format.
When this publication is made available on media, Yealink(Xiamen) Network Technology CO.,
LTD. gives its consent to downloading and printing copies of the content provided in this file only
for private use but not for redistribution. No parts of this publication may be subject to alteration,
modification or commercial use. Yealink(Xiamen) Network Technology CO., LTD. will not be
liable for any damages arising from use of an illegally modified or altered publication.
THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS GUIDE ARE
SUBJECT TO CHANGE WITHOUT NOTICE. ALL STATEMENTS, INFORMATION, AND
RECOMMENDATIONS IN THIS GUIDE ARE BELIEVED TO BE ACCURATE AND PRESENTED
WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL
RESPONSIBILITY FOR THEIR APPLICATION OF PRODUCTS.
YEALINK(XIAMEN) NETWORK TECHNOLOGY CO., LTD. MAKES NO WARRANTY OF ANY KIND
WITH REGARD TO THIS GUIDE, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Yealink(Xiamen) Network
Technology CO., LTD. shall not be liable for errors contained herein nor for incidental or
consequential damages in connection with the furnishing, performance, or use of this guide.
Hereby, Yealink(Xiamen) Network Technology CO., LTD. declares that this phone is in
conformity with the essential requirements and other relevant provisions of the CE, FCC.
You can find the CE and FCC information from the label on the back of the IP phone.
Statements of compliance can be obtained by contacting [email protected].
This device is marked with the CE mark in compliance with EC Directives 2014/35/EU and 2014/30/EU.

Any Changes or modifications not expressly approved by the party responsible for compliance could void
the user's authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
1. This device may not cause harmful interference, and
2. this device must accept any interference received, including interference that may cause undesired
operation.
Note: This device is tested and complies with the limits for a Class B digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment
off and on, the user is encouraged to try to correct the interference by one or more of the
following measures:
1. Reorient or relocate the receiving antenna.
2. Increase the separation between the equipment and receiver.
3. Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
4. Consult the dealer or an experience radio/TV technician for help.
To avoid the potential effects on the environment and human health as a result of
the presence of hazardous substances in electrical and electronic equipment, end
users of electrical and electronic equipment should understand the meaning of
the crossed-out wheeled bin symbol. Do not dispose of WEEE as unsorted
municipal waste and have to collect such WEEE separately.
We are striving to improve our documentation quality and we appreciate your feedback. Email
your opinions and comments to [email protected].

Yealink SIP-T48G IP phone firmware contains third-party software under the GNU General Public
License (GPL). Yealink uses software under the specific terms of the GPL. Please refer to the GPL
for the exact terms and conditions of the license.
The original GPL license, source code of components licensed under GPL and used in Yealink
products can be downloaded online:
http://www.yealink.com/GPLOpenSource.aspx?BaseInfoCateId=293&NewsCateId=293&CateId
=293.

About This Guide
v
Thank you for choosing the SIP-T48G IP phone, an ultra-elegant Gigabit IP phone which
is exquisitely designed to provide business telephony features, such as Call Hold, Call
Transfer, Busy Lamp Field, Call Recording, Multicast Paging and Conference over an IP
network. It also features an enhanced user experience and newly developed industrial
designs, with a large touch screen for easy and efficient use.
This guide provides everything you need to quickly use your new phone. First, verify
with your system administrator that the IP network is ready for phone configuration. Also
be sure to read the Packaging Contents and Regulatory Notices sections in this guide
before you set up and use the SIP-T48G IP phone.
Note
Topics provided in this guide include:
Chapter 1 Overview
Chapter 2 Getting Started
Chapter 3 Customizing Your Phone
Chapter 4 Basic Call Features
Chapter 5 Advanced Phone Features
This section describes the changes to this guide for each release and guide version.
The following sections are new:
Screen Saver on page 33
Power Saving on page 35
Network Directory and Network Call Log features are hidden for IP phones in neutral
firmware, which are designed for the BroadWorks environment. Please contact your
system administrator for more information.

User Guide for the SIP-T48G IP Phone
vi
Major updates have occurred to the following sections:
Icon Instructions on page 3
Volume on page 47
Ring Tones on page 49
DSS Keys on page 95
Call Park on page 155
Display Issues on page 221
Major updates have occurred to the following sections:
Icon Instructions on page 3
Optional Accessories on page 14
Phone Installation on page 16
Entering Data and Editing Fields on page 27
Troubleshooting on page 221
The following section is new:
Wi-Fi on page 90
Major updates have occurred to the following section:
Bluetooth on page 83
The following sections are new:
Shared Call Appearance (SCA)on page 190
Bridged Line Appearance (BLA) on page 207
Major updates have occurred to the following sections:
Icon Instructions on page 3
LED Instructions on page 8
Web User Interface on page 9
Call Forward on page 140

About This Guide
vii
The following section is new:
Phone Lock on page 44
Emergency Number on page 116
Short Message Service (SMS) on page 213
Major updates have occurred to the following sections:
Icon Instructions on page 3
User Interfaces on page 8
Bluetooth on page 83
DSS Keys on page 90
Anonymous Call Rejection on page 166
Intercom on page 178
Multicast Paging on page 181
Appendix A - Time Zones on page 235
The following section is new:
Optional Accessories on page 14
Major updates have occurred to the following sections:
DSS Keys on page 90
Appendix A - Time Zones on page 235
The following section is new:
BLF List on page 171
Major updates have occurred to the following sections:
LED Instructions on page 8
Ring Tones on page 49
Anonymous Call Rejection on page 166
Multicast Paging on page 181
Troubleshooting on page 221
Appendix A - Time Zones on page 235

User Guide for the SIP-T48G IP Phone
viii
Major updates have occurred to the following sections:
Documentations on page 11
Packaging Contents on page 13
Phone Installation on page 16
Contact Management on page 51
Placing Calls on page 122

Table of Contents
ix
About This Guide ............................................................. v
In This Guide ............................................................................................................... v
Summary of Changes................................................................................................ v
Changes for Release 80, Guide Version 80.130...................................................... v
Changes for Release 80, Guide Version 80.95....................................................... vi
Changes for Release 80, Guide Version 80.80....................................................... vi
Changes for Release 80, Guide Version 80.60....................................................... vi
Changes for Release 80, Guide Version 80.20.......................................................vii
Changes for Release 73, Guide Version 73.40.......................................................vii
Changes for Release 73, Guide Version 73.16.......................................................vii
Changes for Release 72, Guide Version 72.10......................................................viii
Table of Contents............................................................ ix
Overview ......................................................................... 1
Hardware Component Instructions.......................................................................... 1
Icon Instructions .......................................................................................................... 3
LED Instructions........................................................................................................... 8
User Interfaces ........................................................................................................... 8
Phone User Interface ................................................................................................. 8
Web User Interface .................................................................................................... 9
Documentations........................................................................................................ 11
Getting Started.............................................................. 13
Packaging Contents................................................................................................. 13
Optional Accessories............................................................................................... 14
Phone Installation ..................................................................................................... 16
Phone Initialization ................................................................................................... 19
Phone Status ............................................................................................................. 20
Basic Network Settings............................................................................................ 21
Registration ............................................................................................................... 24
Touch Screen Display............................................................................................... 24
Navigating Menus and Fields ................................................................................ 26
Entering Data and Editing Fields............................................................................ 27
Customizing Your Phone ................................................ 31

User Guide for the SIP-T48G IP Phone
x
General Settings ...................................................................................................... 31
Wallpaper.................................................................................................................. 31
Screen Saver ............................................................................................................ 33
Power Saving ............................................................................................................ 35
Backlight.................................................................................................................... 38
Contrast ..................................................................................................................... 39
Language.................................................................................................................. 39
Time & Date............................................................................................................... 40
Administrator Password........................................................................................... 43
Key as Send .............................................................................................................. 44
Phone Lock ................................................................................................................ 44
Audio Settings........................................................................................................... 47
Volume....................................................................................................................... 47
Ring Tones ................................................................................................................. 49
Contact Management ............................................................................................. 51
Directory.................................................................................................................... 51
Local Directory.......................................................................................................... 53
Blacklist...................................................................................................................... 71
Remote Phone Book ................................................................................................ 73
Call History Management....................................................................................... 76
System Customizations............................................................................................ 80
Headset Use ............................................................................................................. 80
Bluetooth ................................................................................................................... 83
Wi-Fi ........................................................................................................................... 90
DSS Keys.................................................................................................................... 95
Account Management........................................................................................... 107
Dial Plan .................................................................................................................. 110
Emergency Number............................................................................................... 116
Live Dialpad............................................................................................................ 117
Hotline ..................................................................................................................... 118
Basic Call Features .......................................................121
Placing Calls ........................................................................................................... 122
Answering Calls...................................................................................................... 124
Ending Calls ............................................................................................................ 126
Redialing Numbers................................................................................................. 126
Recent Call In Dialing............................................................................................. 126
Auto Answer............................................................................................................ 128
Auto Redial.............................................................................................................. 129
Call Completion...................................................................................................... 131
Recall ....................................................................................................................... 132
Call Mute................................................................................................................. 133
Call Hold/Resume................................................................................................... 134
Do Not Disturb (DND)............................................................................................. 135