Yealink Yealink SIP-T48G User manual

Yealink SIP-T48G IP Phone
User Guide
Version 1

User Guide for the SIP-T48G IP Phone 2
CE Mark Warning
This device is marked with the CE mark in compliance with EC Directives 2014/35/EU and 2014/30/EU.
Part 15 FCC Rules
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.
Class B Digital Device or Peripheral
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.
WEEE Warning
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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GNU GPL Information
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.

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About This Guide
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.

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Table of Contents
GNU GPL Information............................................................................................. 3
About This Guide.................................................................................................... 4
Overview................................................................................................................ 8
Hardware Component Instructions....................................................................................................................8
Icon Instructions...............................................................................................................................................10
LED Instructions...............................................................................................................................................11
Getting Started .................................................................................................... 12
Packaging Contents .........................................................................................................................................12
Phone Installation ............................................................................................................................................13
Phone Initialization...........................................................................................................................................16
Phone Status ....................................................................................................................................................16
Touch Screen Display .......................................................................................................................................17
Navigating Menus and Fields...........................................................................................................................19
Entering Data and Editing Fields .....................................................................................................................20
Customizing Your Phone ...................................................................................... 24
General Settings...............................................................................................................................................24
Wallpaper .........................................................................................................................................................24
Backlight...........................................................................................................................................................25
Contrast............................................................................................................................................................26
Language..........................................................................................................................................................26
Time & Date......................................................................................................................................................27
Audio Settings ..................................................................................................................................................29
Ring Tones ........................................................................................................................................................30
Contact Management .......................................................................................................................................32
Directory ...........................................................................................................................................................32
Local Directory .................................................................................................................................................32
Blacklist............................................................................................................................................................45
Call History Management.................................................................................................................................46
System Customizations....................................................................................................................................51

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Headset Use .....................................................................................................................................................51
Hotline ..............................................................................................................................................................52
Basic Call Features.............................................................................................. 53
Placing Calls.....................................................................................................................................................53
Answering Calls ...............................................................................................................................................55
Ending Calls......................................................................................................................................................56
Redialing Numbers ..........................................................................................................................................57
Auto Answer .....................................................................................................................................................57
Auto Redial .......................................................................................................................................................58
Call Mute ..........................................................................................................................................................60
Call Hold/Resume ............................................................................................................................................61
Do Not Disturb (DND).......................................................................................................................................62
Call Forward .....................................................................................................................................................63
Call Transfer.....................................................................................................................................................66
Call Waiting.......................................................................................................................................................68
Conference .......................................................................................................................................................68
Local Conference..............................................................................................................................................69
Call Park...........................................................................................................................................................70
Call Pickup........................................................................................................................................................70
Anonymous Call................................................................................................................................................71
Anonymous Call Rejection ...............................................................................................................................72
Advanced Phone Features ................................................................................... 74
Voice Mail..........................................................................................................................................................74
Message Waiting Indicator (MWI).....................................................................................................................76
Troubleshooting................................................................................................... 77
General Issues..................................................................................................................................................77
Display Issues...................................................................................................................................................77
Call Issues ........................................................................................................................................................78
Headset & Handset Issues...............................................................................................................................78
Audio Issues .....................................................................................................................................................78
Regulatory Notices .............................................................................................. 79
Service Agreements .........................................................................................................................................79

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Limitations of Liability......................................................................................................................................79
Safety Instructions ...........................................................................................................................................79
Appendix A - Time Zones ..................................................................................... 82

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Overview
This chapter provides the overview of the SIP-T48G IP phone. Topics include:
Hardware Component Instructions
The main hardware components of the SIP-T48G IP phone are the touch screen and the keypad.
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

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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, Speaker phone 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.
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.

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Icon Instructions
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
Placed Calls

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Missed Calls
Call Forward
Forwarded Calls
Recording box is full
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
LED Instructions
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.

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Getting Started
This chapter provides the following basic installation instructions and information for obtaining the best
performance with the SIP-T48G IP phone.
Packaging Contents
The following components are included in your SIP-T48G IP phone package:
• SIP-T48G IP Phone
• Phone Stand
• Handset & Handset Cord

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• Power Adapter
• Ethernet Cable
• Quick Start Guide
Check the list before installation. If you find anything missing, contact your system administrator.
Phone Installation
This section introduces how to install the phone:
1. Attach the stand
2. Connect the handset and optional headset
3. Connect the network and power
1) Attach the stand
Desk Mount Method

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Wall Mount Method (Optional)
2) Connect the handset and optional headset
Note The EXT port can also be used to connect an expansion module EXP40. The USB port can
also be used to connect Wi-Fi USB Dongle WF40.
For more information on how to use EHS36, EXP40, Bluetooth USB Dongle BT40 or Wi-
Fi USB Dongle WF40, refer to Yealink EHS36 User Guide, Yealink EXP40 User Guide, Yealink
Bluetooth USB Dongle BT40 User Guide or Yealink Wi-Fi USB Dongle WF40 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.
• AC power (Optional)
• Power over Ethernet (PoE)
Note The IP phone should be used with Yealink original power adapter (5V/2A) only. The use of the
third-party power adapter may cause the damage to the phone.

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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 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.
To connect the PoE:
Connect the Ethernet cable between the Internet port on the phone and an available port on the in-line power
switch/hub.

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Note If in-line power 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). This is an optional connection.
Important! Do not remove power to the phone while it is updating firmware and
configurations.
Phone Initialization
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 touch screen displays “Welcome
Initializing…Please wait” during the initialization.
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.
Phone Status
You can view phone status via phone user interface or web user interface. Available information of phone status
includes:
• General information (IPv4 address, MAC address and firmware version)
• Network status (e.g., IPv4 status, IP mode and MAC address)
• Phone status (e.g., device model, hardware version, product ID, MAC address and device certificate
status)
• Account status (e.g., register status of SIP accounts)
Note You can view the device certificate status via phone user interface only.
To view the phone status via phone user interface:
1. Press , or tap ->Status.

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2. Tap the desired item to view the specific information.
Touch Screen Display
Idle Screen Display
If the phone has successfully started up, the idle screen will be displayed. The following figure is an example of
what is displayed on the touch screen.

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No. Name Description
1 Status Bar Displays the phone’s default account, icons and the time and date.
2 Default Account The label of the default account is displayed in the left of the status bar.
If multiple accounts are already registered, tap and select the desired
default account.
3 Icons Icons are displayed in the middle of the status bar.
4 Time and Date The phone’s time and date are displayed in the right of the status bar.
5 Line Keys (1-11) The idle screen displays line keys 1-11. The line keys 1-6 on the left and the
line keys 7-11 on the right can be used to activate up to 11 lines.
Various features can be assigned to line keys.
Each line key can display the label and indicate the status of the assigned
feature.
6 DSS Key Provides a quick access to the line key screen.
Then, you can tap the desired line key to configure it.
7 Wallpaper Shows the specified wallpaper, which can be customized.
8 Call Window Displays call information.
9 Shortcut Keys
: tap this shortcut key to enter the History screen and view call history.
: tap this shortcut key to enter the Directory screen and view contacts.
: tap this shortcut key to toggle the DND mode or enter the custom
DND configuration screen.
: tap this shortcut key to enter the main menu.

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Configuration Screen Display
No. Name Description
1 Screen Title Area Displays the title of the current menu screen.
2 Operation Option Area Displays various operation options for different menu screens.
3 Menu Tree Area Displays menu items.
Tap the desired menu item to enter the corresponding feature
configuration screen.
4 Configuration Area Displays configuration items of the highlighted menu item in the
menu tree area. You can configure feature settings in this area.
5 Soft Keys Label automatically to identify their context-sensitive features.
Navigating Menus and Fields
To navigate menus and fields, you can:
• Tap soft keys on the touch screen.
• Tap menu items, fields, and arrows on the touch screen.
• Press keys on the phone keypad.
Note The menu system will automatically exit to the idle screen after 60 seconds of inactivity.

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To operate your phone, follow these tips:
If you want to Action
Enter the main menu.
Tap .
Return to the idle screen. Tap .
Go back to the previous menu. Tap or press .
Select an item. Tap the item.
Scroll to the item by pressing or .
Scroll through items page by page. Tap or .
(If you are in the call history, local directory, language
configuration screen or ring tones configuration
screen, you can also press or .)
Scroll through values for a field. Tap the field’s highlighted gray box. From the pull-
down list, tap or to scroll through values page
by page, or press or to scroll values one by
one.
Select a value for a field. From the pull-down list, tap the value or scroll to the
value and then press .
Entering Data and Editing Fields
You can enter data and edit fields using the phone keypad.
Keypad on the phone provides different characters when using the 2aB, abc, Abc, ABC or 123 input mode. You
can change the following input modes to enter data and edit fields on your phone. When your phone keypad
matches the input mode, you can press the keypad repeatedly to view the character (or numbers) options and
stop to select. When the character (or numbers) you want to enter displays in the field, wait one second, and
enter the next character (or numbers).