When this publication is made available on media, Yealink 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 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 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
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, and
2. This device must accept any interference received, including interference that may cause undesired
with the essential requirements and other relevant provisions of the CE, FCC.
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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.
)07)2.+0(14/#6+10
Yealink SIP-T48G 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
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, Multicast Paging and Conference over an IP network.
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.
If this is your first time using the SIP-T48G IP phone, we recommend that you first refer to
the Quick Installation Gu ide and Quick Reference Guide, available online:
Shared Line, Busy Lamp Field List, Network Directory and Network Call Log features are
hidden for IP phones in neutral version, which are designed for BroadWorks environment.
Please contact your system administrator for more information.
Topics provided in this guide include:
z Chapter 1 Overview
z Chapter 2 Getting Started
z Chapter 3 Customizing Your Phone
z Chapter 4 Basic Call Features
z Chapter 5 Advanced Phone Features
This section describes the changes to this guide for each release and guide version.
Major updates have occurred to the following sections:
z Bluetooth Headset on page 61
z Remote PhoneBook on page 55
ix
User Guide for the SIP-T48G IP Phone
z Line Keys on page 66
z Anonymous Call on page 124
z Troubleshooting on page 153
z Appendix A - Time Zones on page 167
x
About This Guide
xi
Overview
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About This Guide.........................................................................ix
In This Guide.............................................................................................................................ix
Summary of Changes ............................................................................................................ix
Changes for Release 71, Guide Version 71.150..............................................................ix
Table of Contents .........................................................................1
This chapter provides the overview of the SIP-T48G IP phone. Topics include:
z Hardware Component Instructions
z Icon Instructions
z LED Instructions
z User Interfaces
z 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 LCD screen and the
keypad.
4
Hardware component instructions of the SIP-T48G IP phone are:
Overview
LCD Screen
Ԙ
Power Indicator LED Indicates phone power and some feature statuses.
ԙ
HEADSET Key Toggles and indicates the headset mode.
Ԛ
MUTE Key Toggles and indicates mute feature.
MESSAGE Key Accesses voice messages.
HOLD Key Places a call on hold or resumes a held call.
ԛ
REDIAL Key Redials a previously dialed number.
TRANSFER Key Transfers a call to another party.
Speakerphone Key Toggles the hands-free speakerphone mode.
Ԝ
Volume Key
ԝ
ItemDescription
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 file, please wait")
• Time and date
Adjusts the volume of the handset, headset, speaker,
and ringer.
Ԟ
ԟ
Keypad
Scroll through the displayed information.
Confirms actions or answers incoming calls.
Cancels actions or rejects incoming calls.
Provides the digits, letters and special characters in
context-sensitive applications.
5
User Guide for the SIP-T48G IP Phone
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Icons appearing on the LCD screen are described in the following table:
IconsDescription
Network is unavailable
Registered successfully
Register failed
Registering
Hands-free speakerphone mode
Handset mode
Headset mode
Multi-lingual lowercase letters input mode
Multi-lingual uppercase letters input mode
Alphanumeric input mode
6
Numeric input mode
Multi-lingual uppercase and lowercase letters
input mode
Voice Mail
Text Message
Auto Answer
Do Not Disturb
Call Forward
Call Hold
IconsDescription
Overview
Call Mute
Ringer volume is 0
Keypad Lock
Received Calls
Placed Calls
Missed Calls
Recording box is full
A call cannot be recorded
Recording starts successfully
Recording cannot be started
Recording cannot be stopped
Bluetooth
Bluetooth headset is both paired and connected
Conference
The contact icon
The default caller photo
7
User Guide for the SIP-T48G IP Phone
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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 text message or voice mail.
Off The phone is powered off, powered on or idle.
8
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Two ways to customize configurations of your SIP-T48G IP phone:
z The user interface on the IP phone.
z The user interface in a web browser on your PC.
The hardware components keypad and LCD 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.
Overview
You can customize your phone by pressing 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.
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 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:
Status
--IPv4
--MAC
--Firmware
--Network
--Phone
OptionsPhone User InterfaceWeb User Interface
9
User Guide for the SIP-T48G IP Phone
OptionsPhone User InterfaceWeb User Interface
--Accounts
Basic Call Features
--Auto Answer
--Auto Redial
--Call Completion
--Call Forward
--Call Waiting
--Call Park
--Call Pickup
--Call Return
--Conference
--Anonymous Call
--Anonymous Call Rejection
--DND
Basic Phone Settings
--Language
--Time & Date
--Administrator Password
--Ring Tones
--Contrast
--Wallpaper
--Backlight
--Keypad Lock
--Phone Volume
--Call History Management
--Contact Management
--Local Directory
--Blacklist
--Remote Phone Book
--LDAP
--Dial Plan
--DSS Keys
--Key as Send
--Hotline
--Live Dialpad
--Emergency Number
Advanced Phone Features
--BLF
--Call Recording
--Hot Desking
10
--Intercom
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--Multicast Paging
--Music on Hold
--ACD
--Messages
SIP Account
--User Options
--Register Status
--Account Status
--Label
--Display Name
--Register Name
--User Name
--Password
--SIP Server 1/2
--Server Option
--Registrar Port
--Outbound Status
--Outbound Proxy
--NAT Traversal
--STUN Status
--STUN Server
Overview
Note
The table above lists most of the feature options. Please refer to the relevant sections for
more information.
The following table shows documentations available for the SIP-T48G IP phone.
NameContentsWhere found Format/ Language
Quick Installation
Guide
Quick Reference
Guide
User Guide
Basic setup of the
phone
Basic call features
and phone
customizations
Phone/Web user
interface settings
Basic call features
and advanced
phone features
In the
package
In the
package
CD attached
in the package
PDF/English
PDF/English
PDF/English
11
User Guide for the SIP-T48G IP Phone
Note
You can also download the latest documentations online:
This chapter provides the following basic installation instructions and information for
obtaining the best performance with the SIP-T48G IP phone. Topics include:
z Packaging Contents
z Phone Installation
z Phone Initialization
z Phone Status
z Basic Network Settings
z Registration
z Idle Screen
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:
z SIP-T48G IP Phone
14
z Phone Stand
z Wall Mount Bracket (Optional)
z Power Adapter (Optional)
z Handset & Handset Cord
Getting Started
z Ethernet Cable
z Quick Installation Guide & Quick Reference Guide
15
User Guide for the SIP-T48G IP Phone
2JQPG+PUVCNNCVKQP
z CD-ROM
Check the list before installation. If you find anything missing, contact your system
administrator.
If your phone is already installed, proceed to Phone Initialization on page 19.
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
16
Wall Mount Method (Optional)
Getting Started
Note
Note
The wall mount bracket should be purchased separately. For more information on how
to attach the wall mount bracket, refer to Yealink Wall Mount Quick Installation Guide for T4X IP Phones.
2)Connect the handset and optional headset
The headset, wireless headset adapter EHS36 and Bluetooth USB dongle BT40 should be
purchased separately.
The EXT port can also be used to connect an expansion module EXP40.
For more information on how to use EHS36, EXP40 and Bluetooth USB Dongle BT40, refer
to Yealink EHS36 User Guide, Yealink EXP40 User Guide and Yealink Bluetooth USB Dongle
BT40 User Guide.
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.
z AC power (Optional)
z Power over Ethernet (PoE)
AC Power (Optional)
To connect the AC power:
17
User Guide for the SIP-T48G IP Phone
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 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.
Note
To connect the PoE:
1.Connect the Ethernet cable between the Internet port on the phone and an
available port on the in-line power switch/hub.
If in-line power switch/hub is provided, you don’t need to connect the phone to the
power adapter. Make sure the switch/hub is PoE-compliant.
The phone can also share the network with another network device such as a PC
(personal computer). It is an optional connection.
Important! Do not unplug or remove power to the phone while it is updating firmware
and configurations.
18
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After your phone is powered on, the system boots up and performs the following steps:
Automatic Phone Initialization
The phone finishes the initialization by loading the saved configuration. The LCD screen
displays "Initializing…Please wait" during this process
DHCP (Dynamic Host Configuration Protocol)
The phone attempts to contact a DHCP server in your network to obtain valid IPv4
network settings (e.g., IP address, subnet mask, default gateway address and DNS
address) by default.
Getting Started
Note
If your network does not use DHCP, proceed to Basic Network Settings on page 15.
You can view phone status via phone user interface or web user interface.
Available information of phone status includes:
z Network status (e.g., IPv4 status, IPv6 status, IP address mode and MAC address).
z Phone status (e.g., device model, firmware version and product ID).
z Account status (e.g., register status of SIP accounts).
To view the phone status via phone user interface:
1.Press , or press Menu->Status.
2.Press or to scroll through the list and view the specific information.
To view the phone status via web user interface:
19
User Guide for the SIP-T48G IP Phone
$CUKE0GVYQTM5GVVKPIU
1.Open the web browser on your computer.
2.Enter the IP address in the browser’s address bar, and then press the Enter key.
3.Enter the user name (admin) and password (admin) in the login page.
4.Click Confirm to login.
The phone status is displayed on the first page of the web user interface.
If your phone cannot contact a DHCP server for any reason, you need to configure
network settings manually. The IP phone can support either or both IPv4 and IPv6
addresses.
To configure the IP address mode via phone user interface:
2.Press or , or the Switch soft key to select the Static IP from the Type field.
3.Enter the desired values in the IP Address, IPv6 IP Prefix, Gateway, Primary DNS and
Secondary DNS fields respectively.
4.Press the Save soft key to accept the change or the Back soft key to cancel.
If you are using an xDSL modem, you can connect your phone to the Internet via PPPoE
mode. Set the WAN port as a PPPoE port. The PPPoE port will perform a PPP negotiation
to obtain the IP address. Contact your system administrator for the PPPoE user name
and password.
2.Press or , or the Switch soft key to select the PPPoE from the Type field.
3.Enter the user name and password in the corresponding fields.
Note
4.Press the Save soft key to accept the change or the Back soft key to cancel.
Using the wrong network parameters may result in inaccessibility of your phone and may
also have an impact on your network performance. For more information on these
parameters, contact your system administrator.
21
User Guide for the SIP-T48G IP Phone
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Generally, your phone will be deployed with multiple other phones. In this case, your
system administrator will configure the phone parameters beforehand, so that after you
start up your phone, the phone will be registered and ready for use. If your phone is not
registered, you may have to register it. For more information on how to register your
phone, refer to Account Management on page 78.
If the phone has successfully started up, the idle LCD screen will be shown as below.
Idle Screen description:
No.Description
1 This area shows the phone’s time and date.
2
3
4 This area shows three page icons.
5
6
22
This area shows the phone feature status. For more information,
refer to Icon Instructions on page 6.
This area shows the line key labels. You can customize the line key
as other functions. For more information, refer to Line Keys on
page 66.
This area shows the soft key labels. The default soft key labels are
“History”, “Directory”, “DND” and “Menu”.
This area shows the wallpaper. You can customize the wallpaper.
For more information, refer to Wallpaper on page 25.
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