Yealink Yealink SIP-T48G User manual

Copyright © 2015 YEALINK NETWORK TECHNOLOGY CO., LTD.
Copyright © 2015 Yealink Network Technology CO., LTD. All rights reserved. No parts of this
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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 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.
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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
Yealink SIP-T48G IP phone with Lync firmware enables a new era in unified
communications. It is designed to work with Microsoft®Lync™ 2013. Connecting a
Yealink SIP-T48G IP phone to Microsoft®Lync™ server allows you to place regular and
Voice over Internet Protocol (VoIP) calls, answer calls, forward calls, conduct a
conference call, and dial from your Lync contacts list through integration with Microsoft’s
Active Directory.
This guide provides everything you need to quickly use your new phone. First, verify
with your system administrator that the network is prepared for configuring your Yealink
SIP-T48G IP phone, and your network is correctly configured. Also be sure to read the
Packaging Contents and Regulatory Notices sections in this guide before you set up and
use the Yealink SIP-T48G IP phone.
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 Better Together over Ethernet
This section describes the changes to this guide for each release and guide version.
Major update has occurred to the following section:
Troubleshooting on page 107
The following sections are new for this edition:
E911 on page 53

User Guide for the SIP-T48G IP Phone
vi
Static Forwarding on Lync Client on page 72
Response Groups on page 80
Inbound Private Line on page 85
Call Park on page 88
Phone Lock on page 40
Account Lock on page 14
Dial Search Delay on page 48
Always Online on page 52
Dial-now on page 57
Boss-Admin on page 80
Major updates have occurred to the following sections:
Icon Instructions on page 3
Sign-in on page 12
Entering Data and Editing Fields on page 23
Changing Presence on page 50

Table of Contents
vii
About This Guide ...................................................................... v
In This Guide ......................................................................................................................... v
Summary of Changes.......................................................................................................... v
Changes for Release 7, Guide Version 7.50 .................................................................. v
Changes for Release 7, Guide Version 7.35 .................................................................. v
Table of Contents.....................................................................vii
Overview .................................................................................. 1
Hardware Component Instructions.................................................................................... 1
Icon Instructions.................................................................................................................... 3
LED Instructions..................................................................................................................... 4
User Interfaces ..................................................................................................................... 4
Phone User Interface ........................................................................................................ 4
Web User Interface........................................................................................................... 4
Documentations ................................................................................................................... 5
Getting Started......................................................................... 7
Packaging Contents............................................................................................................. 7
Optional Accessory ............................................................................................................. 8
Phone Installation................................................................................................................. 9
Phone Initialization ............................................................................................................. 11
Sign-in.................................................................................................................................. 12
Account Lock....................................................................................................................... 14
Touch Screen Display......................................................................................................... 16
Favorites Screen ............................................................................................................. 18
History Screen ................................................................................................................. 19
Contacts Screen.............................................................................................................. 21
Menu Screen ................................................................................................................... 21
Navigating Menus and Fields .......................................................................................... 22
Entering Data and Editing Fields ..................................................................................... 23
Using the phone keypad ............................................................................................... 23
Using the on-screen keyboard ...................................................................................... 24
Phone Status ....................................................................................................................... 27
Basic Network Settings...................................................................................................... 29

User Guide for the SIP-T48G IP Phone
viii
Customizing Your Phone ......................................................... 33
General Settings ................................................................................................................ 33
Language......................................................................................................................... 33
Time & Date ..................................................................................................................... 34
Backlight .......................................................................................................................... 37
Administrator Password ................................................................................................. 38
Key as Send..................................................................................................................... 39
Phone Lock....................................................................................................................... 40
Audio Settings .................................................................................................................... 43
Volume ............................................................................................................................. 43
Ring Tones ........................................................................................................................ 44
Contact Management....................................................................................................... 46
Viewing Contacts ............................................................................................................ 46
Searching for Contacts................................................................................................... 47
Placing Calls to Contacts ............................................................................................... 49
Call History Management ................................................................................................ 49
Changing Presence............................................................................................................ 50
Always Online ................................................................................................................. 52
E911...................................................................................................................................... 53
E911 Location Tip ............................................................................................................ 53
Location Notification....................................................................................................... 54
Adding the Location Information .................................................................................. 55
Viewing the Location Information ................................................................................. 56
Emergency Call............................................................................................................... 56
Dial-now .............................................................................................................................. 57
Live Dialpad........................................................................................................................ 59
Basic Call Features................................................................. 61
Placing Calls ....................................................................................................................... 61
Answering Calls ................................................................................................................. 64
Ending Calls........................................................................................................................ 65
Redialing Numbers ............................................................................................................ 65
Auto Answer ....................................................................................................................... 66
Call Waiting ........................................................................................................................ 67
Call Mute............................................................................................................................. 68
Call Hold/Resume............................................................................................................... 68
Call Forward ....................................................................................................................... 69
Static Forwarding............................................................................................................ 69
Dynamic Forwarding ...................................................................................................... 79
Response Groups ............................................................................................................... 80
Boss-Admin Feature........................................................................................................... 80
As a Boss in the Boss-Admin Scenario ......................................................................... 81

Table of Contents
ix
As a Delegate in the Boss-Admin Scenario................................................................. 83
Inbound Private Line .......................................................................................................... 85
Call Transfer ........................................................................................................................ 86
Conference ......................................................................................................................... 87
Call Park .............................................................................................................................. 88
Voice Mail ........................................................................................................................... 90
Better Together over Ethernet ................................................ 93
Getting Started with Better Together over Ethernet ...................................................... 93
Installing the Yealink Better Together over Ethernet Connector ................................... 93
Enabling Better Together over Ethernet ........................................................................ 100
Using Better Together over Ethernet .............................................................................. 104
Troubleshooting .....................................................................107
Regulatory Notices ................................................................117
Service Agreements ........................................................................................................ 117
Limitations of Liability ...................................................................................................... 117
Safety Instructions ............................................................................................................ 117
Appendix A - Time Zones......................................................119
Index ......................................................................................121

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 numbers or voice mail numbers
• Prompt text (for example, “Saving 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 the voice mailbox.
⑨
REDIAL Key
Enters Placed list or 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.
Confirms actions or answers incoming calls.
Cancels actions or rejects incoming calls.
⑪
Volume Key
Adjusts the volume of the handset, headset, speaker 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
Call Mute
Call Forward
Answer a call
Call Hold
Call resume
Add a new call
Call transfer
Call Park
Dial/Call
Reject or cancel a call
Received Calls
Placed Calls
Missed Calls
Return to previous screen
Receive a call
Make a call
Handset mode
Headset mode
Hands-free speakerphone mode
Available
Busy
DND (Do Not Disturb)

User Guide for the SIP-T48G IP Phone
4
Icons
Description
Be Right Back/Off Work/Away
Off Line
Power Indicator LED
LED Status
Description
Solid red
The phone is initializing.
Fast flashing red
The phone is ringing.
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 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 33.
In addition to the phone user interface, you can also customize your phone via web user
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_Phone_Family_Administrator_Guide_V72_2 .

Overview
5
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. Enter the IP
address (e.g., http://192.168.0.10 or 192.168.0.10) in the address bar of web browser on
your PC. The default administrator user name and password are both “admin”
(case-sensitive).
The following table shows documentations available for the SIP-T48G IP phone.
Name
Contents
Where found
Language
Quick Start Guide
Basic setup and
call features of the
phone
In the package/
On the website
English/Chinese
User Guide
Phone/Web user
interface settings
Basic call features
and BToE (Better
Together over
Ethernet) feature
On the website
English/Chinese
Note
You can also download the latest documentations online:
http://www.yealink.com/SupportDownloadfiles_detail.aspx?CateId=1206&flag=142.

User Guide for the SIP-T48G IP Phone
6

Getting Started
7
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
Sign-in
Account Lock
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
8
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 item is optional accessory for your SIP-T48G IP phone. You need to
purchase it separately if required.
Wall Mount Bracket

Getting Started
9
Power Adapter
If your phone is already installed, proceed to Phone Initialization on page 11.
This section introduces how to install the phone:
1) Attach the stand or the optional wall mount bracket
2) Connect the handset and optional headset
3) Connect the network and power
1) Attach the stand or the optional wall mount bracket
Desk Mount Method
Wall Mount Method (Optional)
Note
The wall mount bracket should be purchased separately.
The top two slots are plugged up by silica gels. You need to pull out the silica gels before
attaching the wall mount bracket. For more information on how to mount your phone to a
wall, refer to Yealink Wall Mount Quick Installation Guide for T4X IP Phones .

User Guide for the SIP-T48G IP Phone
10
2) Connect the handset and optional headset
Note
3) Connect the network and power
You have two options for power and network connections. Your system administrator will
advise you which one to use.
AC power (Optional)
Power over Ethernet (PoE)
AC Power (Optional)
To connect the AC power:
1. Connect the DC plug on the power adapter to the DC5V port on the phone and
connect the other end of the power adapter into an electrical power outlet.
2. Connect the included or a standard Ethernet cable between the Internet port on the
phone and the one on the wall or the switch/hub device port.
Power over Ethernet
With the included or a regular Ethernet cable, the SIP-T48G IP phone can be powered
from a PoE-compliant switch or hub.
The headset and wireless headset adapter EHS36 should be purchased separately.
For more information on how to use EHS36, refer to Yealink EHS36 User Guide.