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
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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

Table of Contents
xi
Call Forward ........................................................................................................... 140
Call Transfer ............................................................................................................ 149
Call Waiting............................................................................................................. 151
Conference ............................................................................................................. 152
Local Conference ................................................................................................... 152
Network Conference.............................................................................................. 153
Call Park .................................................................................................................. 155
FAC Mode ............................................................................................................... 155
Transfer Mode......................................................................................................... 158
Call Pickup............................................................................................................... 160
Anonymous Call ..................................................................................................... 165
Anonymous Call Rejection..................................................................................... 166
Advanced Phone Features...........................................169
Busy Lamp Field (BLF)............................................................................................ 169
BLF List ..................................................................................................................... 171
Call Recording ........................................................................................................ 173
Hot Desking............................................................................................................. 175
Intercom................................................................................................................... 178
Outgoing Intercom Calls ....................................................................................... 178
Incoming Intercom Calls........................................................................................ 178
Using Intercom........................................................................................................ 180
Multicast Paging..................................................................................................... 181
Sending RTP Stream............................................................................................... 181
Receiving RTP Stream ............................................................................................ 184
Using Multicast Paging .......................................................................................... 186
Music on Hold......................................................................................................... 187
Automatic Call Distribution (ACD)........................................................................ 188
Shared Call Appearance (SCA) .......................................................................... 190
Configuring SCA Feature on the IP Phone........................................................... 191
Using SCA Feature on the IP Phone ..................................................................... 198
Bridged Line Appearance (BLA) .......................................................................... 207
Configuring BLA Feature on the IP Phone............................................................ 208
Using BLA Feature on the IP Phone ...................................................................... 211
Messages................................................................................................................ 213
Short Message Service (SMS) ............................................................................. 213
Voice Mail................................................................................................................ 216
Message Waiting Indicator (MWI)....................................................................... 218
Troubleshooting ............................................................221
General Issues........................................................................................................ 221
Display Issues ......................................................................................................... 221
Password Issues...................................................................................................... 222

User Guide for the SIP-T48G IP Phone
xii
Call Issues ............................................................................................................... 223
Headset & Handset Issues.................................................................................... 223
Audio Issues ............................................................................................................ 224
Log Issues ................................................................................................................ 226
Reboot & Upgrade & Reset Issues........................................................................ 229
Regulatory Notices .......................................................233
Service Agreements .............................................................................................. 233
Limitations of Liability............................................................................................. 233
Safety Instructions .................................................................................................. 233
Appendix A - Time Zones.............................................235
Index .............................................................................237

Overview
1
This chapter provides the overview of the SIP-T48G IP phone. Topics include:
Hardware Component Instructions
Icon Instructions
LED Instructions
User Interfaces
Documentations
If you require additional information or assistance with your new phone, contact your
system administrator.
The main hardware components of the SIP-T48G IP phone are the touch screen and the
keypad.

User Guide for the SIP-T48G IP Phone
2
Hardware component instructions of the SIP-T48G IP phone are:
Item
Description
①
Power Indicator LED
Indicates phone power and some feature statuses.
•Receives an incoming call—Fast flashing
•Receives a voice mail or text message—Slow flashing
②
Touch Screen
The screen is touch-sensitive. Tap to select and highlight
screen items.
Shows information about calls, messages, soft keys,
time, date and other relevant data:
• Call information—caller ID, call duration
• Icons (for example, )
• Missed call text or second incoming caller information
• Prompt text (for example, ―Saving config file!‖)
• Time and date
③
HEADSET Key
Toggles and indicates the headset mode.
④
MUTE Key
Toggles and indicates mute feature.
⑤
HOLD Key
Places a call on hold or resumes a held call.
⑥
TRANSFER Key
Transfers a call to another party.
⑦
Speakerphone Key
Toggles and indicates the hands-free speakerphone
mode.
⑧
MESSAGE Key
Accesses voice messages.
⑨
REDIAL Key
Redials a previously dialed number.
⑩
Position the cursor within text you’re updating.
Enable or disable fields.
Turn pages or scroll through values for a field.
Scroll through items.
Access to History and Directory respectively.
Confirms actions or answers incoming calls.
Cancels actions or rejects incoming calls.
⑪
Volume Key
Adjusts the volume of the handset, headset,
speakerphone and ringer.
⑫
Keypad
Provides the digits, letters and special characters in
context-sensitive applications.
⑬
Speaker
Provides hands-free (speakerphone) audio output.
⑭
Hookswitch Tab
Secures the handset in the handset cradle when the IP
phone is mounted vertically. For more information on
how to adjust the hookswitch tab, refer to Yealink Wall
Mount Quick Installation Guide for Yealink IP Phones .
⑮
Hookswitch
Picking up the handset from the handset cradle, the
hookswitch bounces and the phone connects to the line,
laying the handset down on the handset cradle, the

Overview
3
Item
Description
phone disconnects from the line.
Icons appearing on the touch screen are described in the following table:
Icons
Description
Network is unavailable
The private line registers successfully
Register failed
(Flashing)
Registering
The shared/bridged line registers successfully
Hands-free speakerphone mode
Handset mode
Headset mode
Voice Mail
Text Message
Auto Answer
Do Not Disturb
Call Hold
Call Mute
Ringer volume is 0
Phone Lock
Received Calls

User Guide for the SIP-T48G IP Phone
4
The icons of DSS key appearing on the touch screen are described in the following
table:
Icons
Description
Log into the ACD system
The ACD status is available
The ACD status is unavailable
Log out of the ACD system
Voice Mail
Direct Pickup
Placed Calls
Missed Calls
Call Forward
Forwarded Calls
Recording box is full
A call cannot be recorded
Recording starts successfully
Recording cannot be started
Recording cannot be stopped
Bluetooth mode is on
Bluetooth headset is both paired and connected
Wi-Fi connection is successful
Wi-Fi connection failed
The default caller photo and contact icon

Overview
5
Icons
Description
Group Pickup
Call Park
Park successfully
Call Park idle state
Park failed
Call park ringing state
Retrieve park
Intercom
DTMF
Prefix
Local Group
XML Group
XML Browser
LDAP
Conference
Forward
Transfer
Hold
DND
ReCall
SMS
Record
URL Record
Recording starts successfully (Record/URL Record)
Multicast Paging
Group Listening
Paging List

User Guide for the SIP-T48G IP Phone
6
Icons
Description
Hot Desking
Zero Touch
URL
Phone Lock
Directory
Speed Dial
Icon indicator (associated with BLF/BLF List)
Icons
Description
BLF/BLF list idle state
(Flashing)
BLF/BLF list ringing state
(Flashing)
BLF/BLF list callout state
BLF/BLF list talking state
BLF hold state
BLF list call park state
BLF/BLF list failed state
Icon indicator (associated with a shared line)
The local SCA phone indicates the phone is involved in an SCA call, while the
monitoring SCA phone indicates the phone is not involved in the SCA call.
Icon
Description
The shared line is idle.
(for monitoring SCA phone)
The shared line is seized.
The shared line receives an incoming call.

Overview
7
Icon
Description
(Flashing)
(Flashing)
The shared line is dialing.
The shared line is in conversation.
The shared line conversation is placed on
public hold.
(for local SCA phone)
(for monitoring SCA phone)
The shared line conversation is placed on
private hold.
The shared line conversation is barged in by
the other shared line party.
For a multi-party call, all the shared line
parties participating in this call place the
shared line conversation on hold.
Icon indicator (associated with a bridged line)
The local BLA phone indicates the phone is involved in a BLA call, while the monitoring
BLA phone indicates the phone is not involved in the BLA call.
Icon
Description
The bridged line is idle.
(for monitoring BLA phone)
The bridged line is seized.
(Flashing)
The bridged line receives an incoming call.
(Flashing)
The bridged line is dialing.
The bridged line is in conversation.
The bridged line conversation is placed on
hold.

User Guide for the SIP-T48G IP Phone
8
Power Indicator LED
LED Status
Description
Solid red
The phone is initializing.
Fast flashing red
The phone is ringing.
Slow flashing red
The phone receives a voice mail or text message.
Off
The phone is powered off.
The phone is idle.
The phone is busy.
The call is placed on hold or is held.
The call is muted.
Note
Two ways to customize configurations of your SIP-T48G IP phone:
The user interface on the IP phone.
The user interface in a web browser on your PC.
The hardware components keypad and touch screen constitute the phone user
interface, which allows the user to execute all call operation tasks and basic
configuration changes directly on the phone. In addition, you can use the web user
interface to access all configuration settings. In many cases, it is possible to use either
the phone user interface and/or the web user interface interchangeably. However, in
some cases, it is only possible to use one or the other interface to operate the phone
and change settings.
You can customize your phone by tapping to access the phone user interface. The
Advanced option is only accessible to the administrator, and the default administrator
password is ―admin‖(case-sensitive). For more information on customizing your phone
with the available options from the phone user interface, refer to Customizing Your
Phone on page 31.
The above introduces the default power indicator LED status. The status of the power
indicator LED is configurable via web user interface. For more information, refer to
Yealink_SIP-T2_Series_T19(P) E2_T4_CP860_Series_IP_Phones_Administrator_Guide.