Yealink SIP-T48S User Manual

Name: Yealink SIP-T48S
Brand: Yealink
SKU: 2506895
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Yealink(Xiamen) Network Technology CO., LTD. will not be liable for any damages

arising from use of an illegally modified or altered publication.

Warranty

THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS GUIDE ARE

SUBJECT TO CHANGE WITHOUT NOTICE. ALL STATEMENTS, INFORMATION, AND

RECOMMENDATIONS IN THIS GUIDE ARE BELIEVED TO BE ACCURATE AND PRESENTED

WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL

RESPONSIBILITY FOR THEIR APPLICATION OF PRODUCTS.

YEALINK(XIAMEN) NETWORK TECHNOLOGY CO., LTD. MAKES NO WARRANTY OF ANY KIND

WITH REGARD TO THIS GUIDE, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Yealink(Xiamen) Network

Technology CO., LTD. shall not be liable for errors contained herein nor for incidental or

consequential damages in connection with the furnishing, performance, or use of this guide.

Declaration of Conformity

Hereby, Yealink(Xiamen) Network Technology CO., LTD. declares that this phone is in conformity

with the essential requirements and other relevant provisions of the CE, FCC.

You can find the CE and FCC information from the label on the back of the IP phone.

Statements of compliance can be obtained by contacting support@yealink.com.

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.

Industry Canada (IC)

This Class [B] digital apparatus complies with Canadian ICES-003 and ICCS-03 Part V Rules

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.

Customer Feedback

We are striving to improve our documentation quality and we appreciate your feedback. Email

your opinions and comments to DocsFeedback@yealink.com.

GNU GPL INFORMATION

Yealink SIP-T48S 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

Thank you for choosing the SIP-T48S 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-T48S IP phone.

Note

In This Guide

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

Summary of Changes

This section describes the changes to this guide for each release and guide version.

Changes for Release 81, Guide Version 81.70

Major updates have occurred to the following sections:

 Entering Data and Editing Fields on page 38

 Configuring an Access URL on page 90

 DSS Keys on page 107

 Auto Answer on page 138

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-T48S IP Phone

 Do Not Disturb (DND) on page 147

 Call Forward on page 152

 Call Park/Retrieve on page 168

 Picking up an Incoming Call of the Monitored User on page 189

 Receiving RTP Stream on page 212

BLF Ring Type is moved to Configuring Visual and Audio Alert for BLF Pickup on page 184.

Changes for Release 81, Guide Version 81.20

Major updates have occurred to the following sections:

 Wallpaper on page 43

 Screen Saver on page 47

Table of Contents

vii

About This Guide ........................................................................... v

In This Guide .............................................................................................................................................................. v

Summary of Changes ............................................................................................................................................. v

Changes for Release 81, Guide Version 81.70 .......................................................................................... v

Changes for Release 81, Guide Version 81.20 ......................................................................................... vi

Table of Contents ......................................................................... vii

Overview ......................................................................................... 1

Hardware Component Instructions .................................................................................................................. 1

Icon Instructions ....................................................................................................................................................... 3

Feature Status Icons............................................................................................................................................ 3

Line Key Icons ........................................................................................................................................................ 4

Other Icons ............................................................................................................................................................. 8

LED Instructions ........................................................................................................................................................ 9

User Interfaces ....................................................................................................................................................... 10

Phone User Interface ....................................................................................................................................... 10

Web User Interface........................................................................................................................................... 10

Documentations .................................................................................................................................................... 13

Getting Started ............................................................................. 15

Packaging Contents ............................................................................................................................................. 15

Optional Accessories ....................................................................................................................................... 16

Phone Installation ................................................................................................................................................. 18

Network Connection ............................................................................................................................................ 21

Connecting to the Wired Network............................................................................................................. 22

Connecting to the Wireless Network ........................................................................................................ 22

Phone Initialization ............................................................................................................................................... 22

Phone Status ........................................................................................................................................................... 23

Basic Network Settings ....................................................................................................................................... 24

Wireless Network Settings ................................................................................................................................ 26

Activating the Wi-Fi Mode ............................................................................................................................ 27

Connecting to the Wireless Network ........................................................................................................ 27

Viewing the Wireless Network Information ........................................................................................... 31

Managing the Saved Wireless Network ................................................................................................... 32

Disconnecting the Wireless Network Connection ............................................................................... 33

User Guide for the SIP-T48S IP Phone

viii

Deactivating the Wi-Fi Mode ....................................................................................................................... 34

Registration ............................................................................................................................................................. 34

Touch Screen Display .......................................................................................................................................... 35

Navigating Menus and Fields........................................................................................................................... 37

Entering Data and Editing Fields..................................................................................................................... 38

Customizing Your Phone ............................................................. 43

General Settings .................................................................................................................................................... 43

Wallpaper ............................................................................................................................................................. 43

Transparency ...................................................................................................................................................... 46

Screen Saver........................................................................................................................................................ 47

Power Saving ...................................................................................................................................................... 50

Backlight ............................................................................................................................................................... 53

Contrast ................................................................................................................................................................ 54

Language.............................................................................................................................................................. 55

Time & Date ........................................................................................................................................................ 56

Administrator Password ................................................................................................................................. 59

Key As Send ........................................................................................................................................................ 59

Phone Lock .......................................................................................................................................................... 60

Audio Settings ........................................................................................................................................................ 63

Volume .................................................................................................................................................................. 63

Ring Tones ........................................................................................................................................................... 65

Key Tone ............................................................................................................................................................... 67

Contact Management ......................................................................................................................................... 68

Directory ............................................................................................................................................................... 68

Local Directory ................................................................................................................................................... 70

Blacklist ................................................................................................................................................................. 88

Remote Phone Book ........................................................................................................................................ 90

Call History Management .................................................................................................................................. 91

Viewing History Records ................................................................................................................................ 92

Placing a Call from History Records .......................................................................................................... 92

Adding a Contact to the Local Directory/Blacklist ............................................................................... 93

Deleting History Records ............................................................................................................................... 94

Disabling History Record ............................................................................................................................... 95

Search Source List in Dialing ............................................................................................................................ 96

System Customizations....................................................................................................................................... 98

Headset Use ........................................................................................................................................................ 98

Bluetooth Headset.......................................................................................................................................... 100

DSS Keys ............................................................................................................................................................. 107

Account Management .................................................................................................................................. 118

Dial Plan .............................................................................................................................................................. 121

Emergency Number ....................................................................................................................................... 127

Live Dialpad ....................................................................................................................................................... 128

Hotline ................................................................................................................................................................. 128

Table of Contents

Basic Call Features ...................................................................... 131

Placing Calls .......................................................................................................................................................... 132

Answering Calls .................................................................................................................................................... 134

Ending Calls ........................................................................................................................................................... 136

Redialing Numbers ............................................................................................................................................. 136

Recent Call In Dialing ........................................................................................................................................ 136

Auto Answer .......................................................................................................................................................... 138

Auto Redial ............................................................................................................................................................ 140

Call Completion ................................................................................................................................................... 142

Recall ........................................................................................................................................................................ 143

Call Mute ................................................................................................................................................................ 144

Muting a Call .................................................................................................................................................... 145

Muting While Dialing .................................................................................................................................... 146

Call Hold/Resume ............................................................................................................................................... 146

Do Not Disturb (DND) ....................................................................................................................................... 147

Call Forward .......................................................................................................................................................... 152

Static Forwarding ............................................................................................................................................ 152

Dynamic Forwarding ..................................................................................................................................... 161

Call Transfer........................................................................................................................................................... 162

Blind Transfer .................................................................................................................................................... 162

Semi-attended Transfer................................................................................................................................ 163

Attended Transfer ........................................................................................................................................... 164

Call Waiting ........................................................................................................................................................... 164

Conference ............................................................................................................................................................ 165

Local Conference ............................................................................................................................................ 165

Network Conference...................................................................................................................................... 167

Call Park/Retrieve ................................................................................................................................................ 168

FAC Mode .......................................................................................................................................................... 170

Transfer Mode .................................................................................................................................................. 173

Call Pickup ............................................................................................................................................................. 175

Directed Call Pickup ....................................................................................................................................... 175

Group Call Pickup ........................................................................................................................................... 177

Anonymous Call .................................................................................................................................................. 179

Anonymous Call Rejection .............................................................................................................................. 180

Advanced Phone Features ......................................................... 183

Busy Lamp Field (BLF) ........................................................................................................................................ 183

Configuring the BLF Feature on the IP Phone ..................................................................................... 183

Using BLF Feature on the IP Phone ......................................................................................................... 188

BLF List .................................................................................................................................................................... 190

Call Recording ...................................................................................................................................................... 192

Recording Using a USB Flash Drive ......................................................................................................... 193

User Guide for the SIP-T48S IP Phone

Recording Using a Record Key .................................................................................................................. 200

Hot Desking .......................................................................................................................................................... 203

Intercom ................................................................................................................................................................. 205

Configuring the Intercom Feature on the IP Phone.......................................................................... 205

Using Intercom ................................................................................................................................................ 207

Multicast Paging .................................................................................................................................................. 208

Sending RTP Stream ...................................................................................................................................... 209

Receiving RTP Stream ................................................................................................................................... 212

Using Multicast Paging ................................................................................................................................. 214

Music on Hold (MoH) ........................................................................................................................................ 215

Automatic Call Distribution (ACD) ............................................................................................................... 216

Shared Call Appearance (SCA) ....................................................................................................................... 219

Configuring SCA Feature on the IP Phone ........................................................................................... 220

Using SCA Feature on the IP Phone ........................................................................................................ 226

Bridged Line Appearance (BLA) ..................................................................................................................... 233

Configuring BLA Feature on the IP Phone ............................................................................................ 234

Using BLA Feature on the IP Phone......................................................................................................... 237

Messages ................................................................................................................................................................ 238

Short Message Service (SMS)..................................................................................................................... 238

Voice Mail .......................................................................................................................................................... 242

Message Waiting Indicator (MWI) ........................................................................................................... 244

Regulatory Notices .................................................................... 247

Service Agreements ........................................................................................................................................... 247

Limitations of Liability ....................................................................................................................................... 247

Safety Instructions .............................................................................................................................................. 247

Appendix..................................................................................... 249

Appendix A – Time Zones ................................................................................................................................ 249

Appendix B – Menu Structure ........................................................................................................................ 251

Index ........................................................................................... 253

Overview

This chapter provides the overview of the SIP-T48S 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.

Hardware Component Instructions

The main hardware components of the SIP-T48S IP phone are the touch screen and the keypad.

User Guide for the SIP-T48S IP Phone

Hardware component instructions of the SIP-T48S IP phone are:

Item

Description

①

Power Indicator LED

Indicates call status, message status and phone’s system

status.

• Receives an incoming call—Fast-flashing

• Receives a voice mail or text message—Slow-flashing

②

Touch Screen

The screen is touch-sensitive. Tap to select and highlight

screen items.

Shows information about calls, messages, soft keys, time, date

and other relevant data:

• Default account

• 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.

The key LED illuminates solid green when hands-free

(speakerphone) mode is activated.

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 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, ringer or

media.

⑫

Keypad

Provides the digits, letters and special characters in

context-sensitive applications.

⑬

Speaker

Provides hands-free (speakerphone) audio output.

⑭

Hookswitch Tab

Secures the handset in the handset cradle when the IP phone

is mounted vertically. For more information on how to adjust

the hookswitch tab, refer to

Yealink Wall Mount Quick

Overview

Item

Description

Installation Guide for Yealink IP Phones

⑮

Hookswitch

• Picking up the handset from the handset cradle, the

hookswitch bounces and the phone connects to the line.

• Laying the handset down on the handset cradle, the phone

disconnects from the line.

Icon Instructions

Feature Status Icons

Icons appearing on the status bar are described in the following table:

Icons

Description

Wired network is unavailable

Hands-free (speakerphone) mode

Handset mode

Headset mode

Voice Mail

Text Message

Auto Answer

Do Not Disturb (DND)

Keep Mute

Ringer volume is 0

Phone Lock

Missed Calls

Call Forward

Recording starts successfully (Using a USB flash drive)

User Guide for the SIP-T48S IP Phone

Icons

Description

Recording is paused (Using a USB flash drive)

Bluetooth mode is on

Bluetooth headset is both paired and connected

Wi-Fi connection is successful

Wi-Fi connection failed

Wired network is unavailable

Line Key Icons

Icon indicator (associated with line key features):

Icons

Description

Hold/Public Hold

Private Hold

DND

Voice Mail

SMS

Direct Pickup

Group Pickup

DTMF

Prefix

Local Group

XML Group

LDAP

XML Browser

Conference

Forward

Overview

Icons

Description

Transfer

ReCall

Record

URL Record

Recording starts successfully (Record/URL Record)

Multicast Paging

Group Listening

Paging List

Hot Desking

Zero Touch

URL

Phone Lock

Other Icons

Icon indicator (associated with call recording)

Icon

Description

Recording box is full (Using a record key)

A call cannot be recorded (Using a record key)

Overview

Icon

Description

Recording starts successfully (Using a record

key)

Recording cannot be started (Using a record

key)

Recording cannot be stopped (Using a record

key)

Icon indicator (associated with call history)

Icon

Description

Received Calls

Placed Calls

Missed Calls

Forwarded Calls

Icon indicator (associated with contact)

Icon

Description

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.

Note

The above introduces the default LED status. The status of the power indicator LED is

configurable via web user interface. For more information, contact your system administrator.

User Guide for the SIP-T48S IP Phone

User Interfaces

Two ways to customize configurations of your SIP-T48S 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.

Phone User Interface

You can customize your phone by tapping to access the phone user interface. The

Advanced option is only accessible to the administrator, and the default administrator password

is “admin” (case-sensitive). For more information on customizing your phone with the available

options from the phone user interface, refer to Customizing Your Phone on page 43.

Note

Web User Interface

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 for IPv4;

http://[2005:1:1:1:215:65ff:fe64:6e0a] or [2005:1:1:1:215:65ff:fe64:6e0a] for IPv6) in the address

bar of a web browser on your PC. The default administrator user name and password are both

“admin” (case-sensitive).

Note

The access to the Advanced settings of the Account or Network via web user interface may be

blocked by the web browser (e.g., Chrome, Firebox) if you have installed “Adblock Plus plugin”.

For a better understanding of the menu structure, please refer to Appendix B – Menu Structure

on page 251.

Overview

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

√

--IPv4

--MAC

--Firmware

--Network

--Phone

--Accounts

Basic Phone Settings

√

--Wallpaper

--Wallpaper on the Idle Screen

√

--Wallpaper with Dsskey Unfold

√

--Transparency

√

--Screen Saver

√

--Power Saving

--Backlight

√

--Contrast

√

--Language

√

--Time & Date

√

--Administrator Password

√

--Key As Send

√

--Phone Lock

√

--Audio Settings

--Ring Tones

√

--Key Tone

√

--Contact Management

--Directory

--Local Directory

√

--Blacklist

√

--Remote Phone Book

--Call History Management

√

--Search Source List in Dialing

--Headset Use

√

--Bluetooth Headset

√

--DSS Keys

√

--Account Registration

√

--Dial Plan

--Emergency Number

--Live Dialpad

--Hotline

√

User Guide for the SIP-T48S IP Phone

Options

Phone User Interface

Web User Interface

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/Retrieve

√

--Call Pickup

√

--Anonymous Call

√

--Anonymous Call Rejection

√

Advanced Phone Features

√

--Busy Lamp Field (BLF)

√

--BLF List

--Call Recording

√

--Hot Desking

√

--Intercom

√

--Multicast Paging

--Music on Hold

--Automatic Call Distribution (ACD)

--Shared Call Appearance (SCA)

--Bridged Line Appearance (BLA)

--Messages

√

SIP Account

√

--User Options

--Activation

√

--Label

√

--Display Name

√

--Register Name

√

--User Name

√

--Password

√

--Server Options

--SIP Server 1/2

√

--Register Port

--Outbound Status

√

--Outbound Proxy1/2

√

--Fallback Interval

√

Overview

Options

Phone User Interface

Web User Interface

--NAT Status

√

Note

Documentations

The following table shows documentations available for the SIP-T48S IP phone.

Name

Contents

Where found

Language

Quick Start Guide

Basic call features

and phone

customizations

In the package

English

On the website

English/Chinese

User Guide

Phone/Web user

interface settings

Basic call features

and advanced

phone features

On the website

English/Chinese

The table above lists most of the feature options. Please refer to the relevant sections for more

information.

User Guide for the SIP-T48S IP Phone

Getting Started

This chapter provides the following basic installation instructions and information for obtaining

the best performance with the SIP-T48S IP phone. Topics include:

 Packaging Contents

 Phone Installation

 Network Connection

 Phone Initialization

 Phone Status

 Basic Network Settings

 Wireless Network Settings

 Registration

 Touch Screen Display

 Navigating Menus and Fields

 Entering Data and Editing Fields

If you require additional information or assistance with your new phone, contact your system

administrator.

Packaging Contents

The following components are included in your SIP-T48S IP phone package:

 SIP-T48S IP Phone

User Guide for the SIP-T48S IP Phone

 Phone Stand

 Handset & Handset Cord

 Ethernet Cable (2m CAT5E UTP cable)

 Quick Start Guide

Check the list before installation. If you find anything missing, contact your system

administrator.

Optional Accessories

The following items are optional accessories for your SIP-T48S IP phone. You need to purchase

them separately if required.

Getting Started

 Wall Mount Bracket

 Power Adapter (5.5mm DC plug)

 Headset YHS32/YHS33

 Wireless Headset Adapter EHS36

 Bluetooth USB Dongle BT40

User Guide for the SIP-T48S IP Phone

 Wi-Fi USB Dongle WF40

Note

Phone Installation

If your phone is already installed, proceed to Phone Initialization on page 22.

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 optional USB flash drive

4) Connect the power

1) Attach the stand or the optional wall mount bracket

Desk Mount Method

We recommend that you use the accessories provided or approved by Yealink. The use of

unapproved third-party accessories may result in reduced performance.

Getting Started

Wall Mount Method (Optional)

Note

2) Connect the handset and optional headset

Note

The EXT port can also be used to connect an expansion module EXP40.

For more information on how to use EHS36 and EXP40, refer to

Yealink EHS36 User Guide

and

Yealink EXP40 User Guide

The hookswitch tab has a lip which allows the handset to stay on-hook when the IP phone is

mounted vertically.

The top two slots are plugged up by silica gel. You need to pull out silica gel before attaching the

wall mount bracket. For more information on how to attach the wall mount bracket, refer to

Yealink Wall Mount Quick Installation Guide for Yealink IP Phones

User Guide for the SIP-T48S IP Phone

3) Connect the optional USB flash drive

Note

4) Connect the power

You have two options for power 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.

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.

The USB flash drive should be purchased separately if required.

The USB port can also be used to connect the Bluetooth USB dongle BT40 or Wi-Fi USB dongle

WF40. The Bluetooth USB dongle BT40 and Wi-Fi USB dongle WF40 should be purchased

separately. For more information on how to use the BT40 and WF40, refer to

Yealink Bluetooth

USB Dongle BT40 User Guide

and

Yealink Wi-Fi USB Dongle WF40 User Guide

+ 236 hidden pages