Yealink Yealink SIP-T48G User manual

Copyright © 2014 YEALINK NETWORK TECHNOLOGY CO., LTD.
Copyright © 2014 Yealink 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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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 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 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 Network Technology CO., LTD. declares that this phone is in conformity
with the essential requirements and other relevant provisions of the CE, FCC.
This device is marked with the CE mark in compliance with EC Directives 2006/95/EC and 2004/108/EC.
This device is compliant with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
1. This device may not cause harmful interference.
2. This device must accept any interference received, including interference that may cause undesired
operation.

Note: This equipment has been tested and found to comply 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 experienced 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
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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 section is new:
Optional Accessories on page 10
Major updates have occurred to the following sections:
DSS Keys on page 74
Shared Line, 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
Appendix A - Time Zones on page 175
The following sections are new:
BLF List on page 140
Major updates have occurred to the following sections:
LED Instructions on page 4
Ring Tones on page 34
Anonymous Call Rejection on page 135
Multicast Paging on page 149
Troubleshooting on page 163
Appendix A - Time Zones on page 175
Major updates have occurred to the following sections:
Documentations on page 7
Packaging Contents on page 9
Phone Installation on page 12
Contact Management on page 36
Placing Calls on page 98

Table of Contents
vii
About This Guide ...................................................................... v
In This Guide ....................................................................................................................v
Summary of Changes......................................................................................................v
Changes for Release 73, Guide Version 73.40 ............................................................v
Changes for Release 73, Guide Version 73.16 ...........................................................vi
Changes for Release 72, Guide Version 72.10 ...........................................................vi
Table of Contents.....................................................................vii
Overview .................................................................................. 1
Hardware Component Instructions.................................................................................1
Icon Instructions ...............................................................................................................3
LED Instructions ................................................................................................................4
User Interfaces.................................................................................................................5
Phone User Interface ....................................................................................................5
Web User Interface.......................................................................................................5
Documentations...............................................................................................................7
Getting Started......................................................................... 9
Packaging Contents.........................................................................................................9
Optional Accessories.................................................................................................. 10
Phone Installation...........................................................................................................12
Phone Initialization.........................................................................................................14
Registration ....................................................................................................................15
Touch Screen Display.....................................................................................................15
Navigating Menus and Fields.......................................................................................17
Entering Data and Editing Fields ..................................................................................18
Phone Status................................................................................................................... 19
Basic Network Settings..................................................................................................21
Customizing Your Phone ......................................................... 25
General Settings............................................................................................................ 25
Wallpaper ................................................................................................................... 25
Backlight......................................................................................................................27
Contrast.......................................................................................................................27

User Guide for the SIP-T48G IP Phone
viii
Language....................................................................................................................28
Time & Date................................................................................................................. 29
Administrator Password ............................................................................................. 32
Key as Send ................................................................................................................ 33
Audio Settings................................................................................................................33
Volume.........................................................................................................................33
Ring Tones ...................................................................................................................34
Contact Management................................................................................................... 36
Directory...................................................................................................................... 37
Local Directory............................................................................................................38
Blacklist........................................................................................................................56
Remote Phone Book...................................................................................................58
Call History Management.............................................................................................61
System Customizations.................................................................................................. 65
Headset Use ...............................................................................................................65
Bluetooth Headset...................................................................................................... 67
DSS Keys .....................................................................................................................74
Account Management ...............................................................................................84
Dial Plan ......................................................................................................................87
Live Dialpad................................................................................................................93
Hotline ......................................................................................................................... 94
Basic Call Features ................................................................. 97
Placing Calls...................................................................................................................98
Answering Calls ...........................................................................................................100
Ending Calls .................................................................................................................102
Redialing Numbers ......................................................................................................102
Recent Call In Dialing .................................................................................................. 102
Auto Answer.................................................................................................................104
Auto Redial................................................................................................................... 105
Call Completion ...........................................................................................................106
Recall ............................................................................................................................108
Call Mute...................................................................................................................... 109
Call Hold/Resume ........................................................................................................110
Do Not Disturb (DND) .................................................................................................. 110
Call Forward.................................................................................................................115
Call Transfer .................................................................................................................123
Call Waiting..................................................................................................................125
Conference...................................................................................................................126
Local Conference...................................................................................................... 126
Network Conference ................................................................................................ 127
Call Park .......................................................................................................................129
Call Pickup....................................................................................................................130
Anonymous Call...........................................................................................................134

Table of Contents
ix
Anonymous Call Rejection........................................................................................... 135
Advanced Phone Features....................................................137
Busy Lamp Field (BLF)..................................................................................................137
BLF List ..........................................................................................................................140
Call Recording.............................................................................................................. 142
Hot Desking.................................................................................................................. 144
Intercom .......................................................................................................................146
Outgoing Intercom Calls ..........................................................................................147
Incoming Intercom Calls........................................................................................... 147
Multicast Paging ..........................................................................................................149
Sending RTP Stream ................................................................................................. 149
Receiving RTP Stream...............................................................................................154
Music on Hold ..............................................................................................................155
Automatic Call Distribution (ACD) ..............................................................................156
Messages..................................................................................................................... 158
Voice Mail..................................................................................................................158
Message Waiting Indicator (MWI) ..........................................................................160
Troubleshooting .....................................................................163
Regulatory Notices ................................................................173
Service Agreements ....................................................................................................173
Limitations of Liability ..................................................................................................173
Safety Instructions........................................................................................................ 173
Appendix A - Time Zones......................................................175
Index ......................................................................................179

User Guide for the SIP-T48G IP Phone
x

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.
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 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 ringer and 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 T4X 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
phone disconnects from the line.

Overview
3
Icons appearing on the touch screen are described in the following table:
Icons
Description
Network is unavailable
Registered successfully
Register failed
(Flashing)
Registering
Hands-free speakerphone mode
Handset mode
Headset mode
Multi-lingual lowercase letters input mode
Multi-lingual uppercase letters input mode
Alphanumeric input mode
Numeric input mode
Multi-lingual uppercase and lowercase letters
input mode
Voice Mail
Auto Answer
Do Not Disturb
Call Forward
Call Hold
Call Mute
Ringer volume is 0

User Guide for the SIP-T48G IP Phone
4
Icons
Description
Received Calls
Placed Calls
Missed Calls
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
The default caller photo and contact icon
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.
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
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-T4X_IP_Phones_Administrator_Guide.

Overview
5
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 the Menu soft key 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 25.
In addition to the phone user interface, you can also customize your phone via web user
interface. In order to access the web user interface, you need to know the IP address of
your new phone. To obtain the IP address, press the OK key on the phone when the
phone is idle. Enter the IP address (e.g., http://192.168.0.10 or 192.168.0.10) in the
address bar of a web browser on your PC. The default administrator user name and
password are both “admin”(case-sensitive).
The main options you can use to customize the IP phone via phone user interface and/or
via web user interface are listed in the following table:
Options
Phone User Interface
Web User Interface
Status
√
√
--IP Address
--MAC
--Firmware
--Network
--Phone
--Accounts
Basic Phone Settings
√

User Guide for the SIP-T48G IP Phone
6
Options
Phone User Interface
Web User Interface
--Wallpaper
√
--Backlight
√
--Contrast
√
--Language
√
--Time & Date
√
--Administrator Password
√
--Key as Send
√
--Ring Tones
√
--Contact Management
×
--Directory
×
--Local Directory
√
--Blacklist
√
--Remote Phone Book
×
--Call History Management
√
--DSS Keys
√
--Account Registration
√
--Dial Plan
×
--Emergency Number
×
--Live Dialpad
×
--Hotline
√
Basic Call Features
√
--Recent Call In Dialing
×
--Auto Answer
√
--Auto Redial
√
--Call Completion
√
--ReCall
√
--Do Not Disturb (DND)
√
--Call Forward
√
--Call Transfer
√
--Call Waiting
√
--Conference
×
--Call Park
√
--Call Pickup
√
--Anonymous Call
√
--Anonymous Call Rejection
√
Advanced Phone Features
√
--Busy Lamp Field (BLF)
√
--BLF List
×
--Call Recording
√
--Hot Desking
√
--Intercom
√

Overview
7
Options
Phone User Interface
Web User Interface
--Multicast Paging
×
--Music on Hold
×
--ACD
×
--Messages
√
SIP Account
√
--User Options
×
--Activation
√
--Label
√
--Display Name
√
--Register Name
√
--User Name
√
--Password
√
--SIP Server1/2
√
--Server Option
×
--Registrar Port
×
--Outbound Status
√
--Outbound Proxy
√
--NAT Status
√
Note
The following table shows documentations available for the SIP-T48G IP phone.
Name
Contents
Where found
Language
Quick Start Guide
Basic call features
and phone
customizations
In the package
English
User Guide
Phone/Web user
interface settings
Basic call features
and advanced
phone features
On the website
English
Note
The table above lists most of the feature options. Please refer to the relevant sections for
more information.
You can also download the latest documentations online:
http://www.yealink.com/DocumentDownload.aspx?CateId=142&flag=142.

User Guide for the SIP-T48G IP Phone
8

Getting Started
9
This chapter provides the following basic installation instructions and information for
obtaining the best performance with the SIP-T48G IP phone. Topics include:
Packaging Contents
Phone Installation
Phone Initialization
Registration
Touch Screen Display
Navigating Menus and Fields
Entering Data and Editing Fields
Phone Status
Basic Network Settings
If you require additional information or assistance with your new phone, contact your
system administrator.
The following components are included in your SIP-T48G IP phone package:
SIP-T48G IP Phone

User Guide for the SIP-T48G IP Phone
10
Phone Stand
Handset & Handset Cord
Ethernet Cable
Quick Start Guide
Check the list before installation. If you find anything missing, contact your system
administrator.
The following items are optional accessories for your SIP-T48G IP phone. You need to
purchase them separately if required.