Yealink SIP-T2 Series, SIP-T19 E2 Series, SIP-T19P E2 Series, SIP-T4 Series, SIP-T5 Series Administrator's Manual

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GNU GPL INFORMATION

Yealink IP phone firmware contains third-party software under the GNU General Public License (GPL). Yealink uses

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The original GPL license, source code of components licensed under GPL and used in Yealink products can be

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Introduction

About This Guide

Yealink administrator guide is intended for administrators who need to properly configure,

customize, manage, and troubleshoot the IP phone system rather than end-users. This guide

helps you understand the Voice over Internet Protocol (VoIP) network and Session Initiation

Protocol (SIP) components, and provides descriptions of all available phone features.

This guide describes three methods for configuring IP phones: central provisioning, web user

interface and phone user interface. It helps you perform the following tasks:



Configure your IP phone on a provisioning server



Configure your phone’s features and functions via web/phone user interface

Introduction



Troubleshoot some common phone issues

Many of the features described in this guide involve network settings, which could affect the IP

phone’s performance in the network. So an understanding of IP networking and a prior

knowledge of IP telephony concepts are necessary.

The information detailed in this guide is applicable to firmware version 82 or higher. The

firmware format is like x.x.x.x.rom. The second x from left must be greater than or equal to 82

(for example, the firmware version of SIP-T46G IP phone: 28.82.0.20.rom).

See the

Yealink Products Regulatory Notices guide

Chapters in This Guide

This administrator guide includes the following chapters:

 Chapter 1, “Product Overview” describes the SIP IP phones and expansion modules.

 Chapter 2, “Getting Started” describes how Yealink phones fit in your network and how to

install and connect IP phones, and also gives you an overview of IP phone’s initialization

process.

 Chapter 3, “Setting Up Your System” describes some essential information on how to set

up your phone network and set up your phone with a provisioning server.

for all regulatory and safety guidance.

 Chapter 4, “Configuring Basic Features” describes how to configure the basic features on IP

phones.

 Chapter 5, “Configuring Advanced Features” describes how to configure the advanced

features on IP phones.

 Chapter 6, “Configuring Audio Features” describes how to configure the audio features on

IP phones.

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series IP Phones

 Chapter 7, “Configuring Security Features” describes how to configure the security features

on IP phones.

 Chapter 8, “Troubleshooting” describes how to troubleshoot IP phones and provides some

common troubleshooting solutions.

 Chapter 9, “Appendix” provides the glossary, time zones, trusted certificates, auto

provisioning flowchart, reference information about IP phones compliant with RFC 3261,

SIP call flows and some other function lists (for example, DSS keys, reading icons).

Conventions Used in Yealink Documentations

Convention

Description

Bold

Highlights the web/phone user interface items such as menus,

menu selections, soft keys, or directory names when they are

involved in a procedure or user action (for example, Click on

Settings->Upgrade.).

Also used to emphasize text (for example, Important!).

Italics

Used to show the format of examples (for example,

http(s)://[IPv6

address]

), or to show the title of a section in the reference

documentations available on the Yealink Technical Support

Website (for example,

Triggering the IP phone to Perform the Auto

Provisioning

Blue Text

Used for cross references to other sections within this

documentation (for example, refer to Ring Tones on page 713), for

hyperlinks to non-Yealink websites (for example, RFC 3315) or for

hyperlinks to Yealink Technical Support website.

Blue Text in Italics

Used for hyperlinks to Yealink resources outside of this

documentation such as the Yealink documentations (for example,

Yealink_SIP_IP_Phones_Auto_Provisioning_Guide_V81

Convention

Description

Indicates that you must enter information specific to phone or

network. For example, when you see <MAC>, enter your phone’s

12-digit MAC address. If you see <phoneIPAddress>, enter your

phone’s IP address.

Indicates that you need to select an item from a menu. For

example, Settings->Basic Settings indicates that you need to

select Basic Settings from the Settings menu.

Yealink documentations contain a few typographic conventions and writing conventions.

You need to know the following basic typographic conventions to distinguish types of in-text

information:

Introduction

You also need to know the following writing conventions to distinguish conditional information:

Reading the Configuration Parameter Tables

The feature descriptions discussed in this guide include two tables. One is a summary table of

provisioning methods that you can use to configure the features. The other is a table of details

of the configuration parameters that you configure to make the features work.

vii

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series IP Phones

This brief section describes the conventions used in the summary table and configuration

parameter table. In order to read the tables and successfully perform configuration changes, an

understanding of these conventions is necessary.

Summary Table Format

The following summary table indicates three provisioning methods (central provisioning, web

user interface and phone user interface, refer to Provisioning Methods for more information)

you can use to configure a feature. Note that the type of provisioning methods available for

each feature varies; not every feature uses all these three methods.

The central provisioning method requires you to configure parameters located in CFG format

configuration files that Yealink provides. For more information on configuration files, refer to

Configuration Files on page 101. As shown below, the table specifies the configuration file name

and the corresponding parameters. That is, the <MAC>.cfg file contains the

account.X.auto_answer

feature.auto_answer_delay

parameter, and the <y0000000000xx>.cfg file contains the

parameter.

The web user interface method requires you to configure features by navigating to the specified

link. This navigation URL can help you quickly locate the webpage where you can configure the

feature.

viii

Configuration Parameter Table Format

Sometimes you will see the words “Refer to the following content” in the Permitted Values or

cannot be configured via web/phone user interface.

The following configuration parameter table describes the parameter that you can configure to

make the feature (for example, auto answer) work.

Introduction

Note

Default field. It means the permitted value or the default value of the parameter has the model

difference or there are many permitted values of the parameter, you can get more details from the following Description field.

The word “None” in the Web User Interface or Phone User Interface field means this feature

The above table also indicates three methods for configuring the feature.

Method 1: Central Provisioning

This table specifies the details of

the auto answer feature. This parameter is disabled by default. If you want to enable the auto

answer feature, open the MAC.cfg file and locate the parameter name

Set the parameter value to “1” to enable the auto answer feature or “0” to disable the auto

answer feature.

Note that some parameters described in this guide contain one or more variables (for example,

X or Y). But the variables in the parameters described in the CFG file are all replaced with specific

value in the scope of variable. You may need to assign a value to the variable before you search

account.X.auto_answer

parameter, which enables or disables

account.X.auto_answer

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series IP Phones

and locate the specific parameter in the CFG file.

For example, if you want to enable the auto answer feature for account 1, you need to locate the

account.1.auto_answer

account.1.auto_answer = 1). If you want to configure the SIP server 1 for account 1, you can

locate the

example, account.1.sip_server.1.address = 10.2.1.48).

The following shows a segment of MAC.cfg file:

account.1.sip_server.1.address

in the MAC.cfg file and then configure it as required (for example,

in the MAC.cfg file and configure it as required (for

Method 2: Web User Interface

As described in the chapter Summary Table Format, you can directly navigate to the specified

webpage to configure the feature. You can also first log into the web user interface, and then

locate the feature field according to the web path (for example, Account->Basic->Auto

Answer) to configure it as required.

Introduction

As shown in the following illustration:

To successfully log into the web user interface, you may need to enter the user name (default:

admin) and password (default: admin). For more information, refer to Web User Interface on

page 98.

Method 3: Phone User Interface

You can configure features via phone user interface. Access to the desired feature according to

the phone path (for example, Menu->Features->Auto Answer->Line X->Auto Answer) and

then configure it as required.

As shown in the following illustration:

Recommended References

For more information on configuring and administering other Yealink products not included in

this guide, refer to product support page at Yealink Technical Support.

To access the latest Release Notes or other guides for Yealink IP phones, refer to the Document

Download page for your phone at Yealink Technical Support.

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series IP Phones

If you want to find Request for Comments (RFC) documents, type

http://www.ietf.org/rfc/rfcNNNN.txt

browser.

This guide mainly takes the SIP-T46G IP phones as example for reference. For more details on

other IP phones, refer to

For other references, look for the hyperlink or web info throughout this administrator guide.

Yealink phone-specific user guide

(NNNN is the RFC number) into the location field of your

Understanding VoIP Principle and SIP Components

This section mainly describes the basic knowledge of VoIP principle and SIP components, which

will help you have a better understanding of the phone’s deployment scenarios.

VoIP Principle

VoIP

VoIP (Voice over Internet Protocol) is a technology using the Internet Protocol instead of

traditional Public Switch Telephone Network (PSTN) technology for voice communications.

It is a family of technologies, methodologies, communication protocols, and transmission

techniques for the delivery of voice communications and multimedia sessions over IP networks.

The H.323 and Session Initiation Protocol (SIP) are two popular VoIP protocols that are found in

widespread implementation.

H.323

H.323 is a recommendation from the ITU Telecommunication Standardization Sector (ITU-T)

that defines the protocols to provide audio-visual communication sessions on any packet

network. The H.323 standard addresses call signaling and control, multimedia transport and

control, and bandwidth control for point-to-point and multi-point conferences.

It is widely implemented by voice and video conference equipment manufacturers, is used

within various Internet real-time applications such as GnuGK and NetMeeting and is widely

deployed by service providers and enterprises for both voice and video services over IP

networks.

xii

SIP

SIP (Session Initiation Protocol) is the Internet Engineering Task Force’s (IETF’s) standard for

multimedia conferencing over IP. It is an ASCII-based, application-layer control protocol

(defined in RFC 3261) that can be used to establish, maintain, and terminate calls between two

or more endpoints. Like other VoIP protocols, SIP is designed to address functions of signaling

and session management within a packet telephony network. Signaling allows call information

to be carried across network boundaries. Session management provides the ability to control

attributes of an end-to-end call.

Introduction

SIP provides capabilities to:

 Determine the location of the target endpoint -- SIP supports address resolution, name

mapping, and call redirection.

 Determine media capabilities of the target endpoint -- Via Session Description Protocol

(SDP), SIP determines the “lowest level” of common services between endpoints.

Conferences are established using only media capabilities that can be supported by all

endpoints.

 Determine the availability of the target endpoint -- A call cannot be completed because

the target endpoint is unavailable, SIP determines whether the called party is already on

the IP phone or does not answer in the allotted number of rings. It then returns a message

indicating why the target endpoint is unavailable.

 Establish a session between the origin and target endpoint -- The call can be completed,

SIP establishes a session between endpoints. SIP also supports mid-call changes, such as

the addition of another endpoint to the conference or the change of a media characteristic

or codec.

 Handle the transfer and termination of calls -- SIP supports the transfer of calls from one

endpoint to another. During a call transfer, SIP simply establishes a session between the

transferee and a new endpoint (specified by the transferring party) and terminates the

session between the transferee and the transferring party. At the end of a call, SIP

terminates the sessions between all parties.

SIP Components

SIP is a peer-to-peer protocol. The peers in a session are called User Agents (UAs). A user agent

can function as one of following roles:

 User Agent Client (UAC) -- A client application that initiates the SIP request.

 User Agent Server (UAS) -- A server application that contacts the user when a SIP request is

received and that returns a response on behalf of the user.

User Agent Client (UAC)

The UAC is an application that initiates up to six feasible SIP requests to the UAS. The six

requests issued by the UAC are: INVITE, ACK, OPTIONS, BYE, CANCEL and REGISTER. When the

SIP session is being initiated by the UAC SIP component, the UAC determines the information

essential for the request, which is the protocol, the port and the IP address of the UAS to which

the request is being sent. This information can be dynamic and will make it challenging to put

through a firewall. For this reason, it may be recommended to open the specific application type

on the firewall. The UAC is also capable of using the information in the request URI to establish

the course of the SIP request to its destination, as the request URI always specifies the host

which is essential. The port and protocol are not always specified by the request URI. Thus if the

request does not specify a port or protocol, a default port or protocol is contacted. It may be

preferential to use this method when not using an application layer firewall. Application layer

xiii

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series IP Phones

firewalls like to know what applications are flowing through which ports and it is possible to use

content types of other applications other than the one you are trying to let through what has

been denied.

User Agent Server (UAS)

UAS is a server that hosts the application responsible for receiving the SIP requests from a UAC,

and on reception it returns a response to the request back to the UAC. The UAS may issue

multiple responses to the UAC, not necessarily a single response. Communication between UAC

and UAS is client/server and peer-to–peer.

Typically, a SIP endpoint is capable of functioning as both a UAC and a UAS, but it functions only

as one or the other per transaction. Whether the endpoint functions as a UAC or a UAS depends

on the UA that initiates the request.

xiv

Table of Contents

Introduction.................................................................................... v

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

Chapters in This Guide ............................................................................................................................................................. v

Related Documentations ....................................................................................................................................................... vi

Conventions Used in Yealink Documentations ........................................................................................................... vii

Reading the Configuration Parameter Tables .............................................................................................................. vii

Summary Table Format ............................................................................................................................................... viii

Configuration Parameter Table Format .................................................................................................................. ix

Recommended References ................................................................................................................................................... xi

Understanding VoIP Principle and SIP Components ................................................................................................ xii

VoIP Principle ................................................................................................................................................................... xii

SIP Components ............................................................................................................................................................. xiii

Table of Contents ......................................................................... xv

Product Overview .......................................................................... 1

SIP IP Phone Models ................................................................................................................................................................. 1

Expansion Modules ................................................................................................................................................................... 1

Getting Started ............................................................................... 3

What IP Phones Need to Meet ............................................................................................................................................. 3

Yealink IP Phones in a Network ........................................................................................................................................... 3

Initialization Process Overview ............................................................................................................................................. 4

Verifying Startup ........................................................................................................................................................................ 6

Setting Up Your System ................................................................ 7

Setting Up Your Phone Network ......................................................................................................................................... 7

DHCP ...................................................................................................................................................................................... 8

DHCP Option ................................................................................................................................................................... 12

Configuring Network Parameters Manually ....................................................................................................... 18

Configuring Transmission Methods of the Internet Port and PC Port .................................................... 23

Configuring PC Port Mode ........................................................................................................................................ 26

Web Server Type ............................................................................................................................................................ 28

Wi-Fi .................................................................................................................................................................................... 32

VLAN ................................................................................................................................................................................... 40

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series IP Phones

IPv6 Support .................................................................................................................................................................... 52

VPN ...................................................................................................................................................................................... 61

Network Address Translation (NAT) ...................................................................................................................... 64

Quality of Service (QoS) .............................................................................................................................................. 81

802.1X Authentication ................................................................................................................................................. 84

Setting Up Your Phones with a Provisioning Server ................................................................................................ 95

Provisioning Points to Consider .............................................................................................................................. 95

Provisioning Methods .................................................................................................................................................. 96

Boot Files, Configuration Files and Resource Files .......................................................................................... 99

Setting Up a Provisioning Server .......................................................................................................................... 108

Upgrading Firmware ................................................................................................................................................... 111

Keeping User Personalized Settings after Auto Provisioning ................................................................... 121

Configuring Basic Features ....................................................... 131

Power Indicator LED ............................................................................................................................................................. 133

Notification Popups ............................................................................................................................................................. 138

Contrast ..................................................................................................................................................................................... 141

Wallpaper ................................................................................................................................................................................. 143

Transparency ........................................................................................................................................................................... 150

Screen Saver ............................................................................................................................................................................ 152

Customizing a Screen Saver XML Template File ............................................................................................. 153

Power Saving .......................................................................................................................................................................... 169

Backlight ................................................................................................................................................................................... 174

Idle Clock Display .................................................................................................................................................................. 178

Bluetooth .................................................................................................................................................................................. 179

Page Switch Key ..................................................................................................................................................................... 182

Enable Page Tips ................................................................................................................................................................... 183

Page Tips for Expansion Module .................................................................................................................................... 185

Label Length ............................................................................................................................................................................ 187

Linekey Length in Short ...................................................................................................................................................... 190

Account Registration ........................................................................................................................................................... 192

Multiple Line Keys per Account ...................................................................................................................................... 199

Multiple Call Appearances ................................................................................................................................................ 206

Call Display .............................................................................................................................................................................. 207

Display Method on Dialing ............................................................................................................................................... 211

Time and Date ........................................................................................................................................................................ 213

NTP Time Server ........................................................................................................................................................... 214

Time and Date Settings ............................................................................................................................................. 219

Daylight Saving Time (DST) ..................................................................................................................................... 224

Language .................................................................................................................................................................................. 231

Loading Language Packs .......................................................................................................................................... 232

Specifying the Language to Use............................................................................................................................ 240

Input Method .......................................................................................................................................................................... 242

Keypad Input Method Customization ................................................................................................................. 242

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Table of Contents

Specifying the Default Input Method.................................................................................................................. 246

Logo Customization ............................................................................................................................................................. 247

Customizing a Logo Template File ....................................................................................................................... 248

Configuring the Logo Shown on the Idle Screen ........................................................................................... 249

Softkey Layout ........................................................................................................................................................................ 252

Customizing Softkey Layout Template File ....................................................................................................... 253

Key As Send ............................................................................................................................................................................. 261

Send Tone ................................................................................................................................................................................ 263

Key Tone ................................................................................................................................................................................... 264

Dial Plan .................................................................................................................................................................................... 265

Dial Plan using XML Template Files ..................................................................................................................... 266

Dial Plan using Digit Map String Rules ............................................................................................................... 281

Emergency Dialplan ............................................................................................................................................................. 290

Hotline ....................................................................................................................................................................................... 295

Off Hook Hot Line Dialing ................................................................................................................................................. 297

Directory List ........................................................................................................................................................................... 299

Customizing a Directory Template File .............................................................................................................. 299

Search Source List In Dialing ............................................................................................................................................ 302

Customizing a Super Search Template File ...................................................................................................... 303

Call Log ...................................................................................................................................................................................... 306

Save Call Log ................................................................................................................................................................. 306

Backing up the Call Logs .......................................................................................................................................... 308

Call List Show Number ........................................................................................................................................................ 311

Missed Call Log ...................................................................................................................................................................... 312

Local Directory ....................................................................................................................................................................... 314

Customizing a Local Contact File .......................................................................................................................... 315

Backing up the Local Contacts ............................................................................................................................... 332

Live Dialpad ............................................................................................................................................................................. 334

Speed Dial ................................................................................................................................................................................ 335

Call Waiting ............................................................................................................................................................................. 339

Auto Redial .............................................................................................................................................................................. 342

Auto Answer ............................................................................................................................................................................ 345

IP Direct Auto Answer ......................................................................................................................................................... 350

Allow IP Call ............................................................................................................................................................................. 351

Accept SIP Trust Server Only ............................................................................................................................................ 352

Call Completion ..................................................................................................................................................................... 354

Anonymous Call ..................................................................................................................................................................... 357

Anonymous Call Rejection ................................................................................................................................................ 361

Do Not Disturb (DND) ......................................................................................................................................................... 363

Busy Tone Delay .................................................................................................................................................................... 378

Return Code When Refuse ................................................................................................................................................ 380

Early Media .............................................................................................................................................................................. 381

180 Ring Workaround ......................................................................................................................................................... 382

Use Outbound Proxy in Dialog ....................................................................................................................................... 384

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Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series IP Phones

SIP Session Timer .................................................................................................................................................................. 386

Session Timer .......................................................................................................................................................................... 388

Ignoring Incoming Calls ..................................................................................................................................................... 391

Call Hold ................................................................................................................................................................................... 392

Music on Hold (MoH) ................................................................................................................................................ 397

Call Forward ............................................................................................................................................................................. 400

Call Transfer ............................................................................................................................................................................. 423

Conference ............................................................................................................................................................................... 426

Local Conference ......................................................................................................................................................... 428

Network Conference .................................................................................................................................................. 429

Transfer on Conference Hang Up .................................................................................................................................. 431

Transfer Mode via Dsskey.................................................................................................................................................. 432

Allow Trans Exist Call ........................................................................................................................................................... 434

Directed Call Pickup ............................................................................................................................................................. 436

Group Call Pickup ................................................................................................................................................................. 443

Dialog Info Call Pickup ........................................................................................................................................................ 450

Recent Call In Dialing .......................................................................................................................................................... 452

ReCall ......................................................................................................................................................................................... 454

Call Number Filter ................................................................................................................................................................. 456

Call Park .................................................................................................................................................................................... 458

Calling Line Identification Presentation (CLIP) .......................................................................................................... 468

Connected Line Identification Presentation (COLP) ............................................................................................... 473

Mute ........................................................................................................................................................................................... 475

Allow Mute ..................................................................................................................................................................... 475

Keep Mute ...................................................................................................................................................................... 477

Intercom .................................................................................................................................................................................... 478

Outgoing Intercom Calls .......................................................................................................................................... 478

Incoming Intercom Calls ........................................................................................................................................... 484

Call Timeout ............................................................................................................................................................................ 488

Ringing Timeout .................................................................................................................................................................... 488

Send user=phone ................................................................................................................................................................. 489

SIP Send MAC ......................................................................................................................................................................... 491

SIP Send Line........................................................................................................................................................................... 493

Reserve # in User Name ..................................................................................................................................................... 495

Password Dial.......................................................................................................................................................................... 497

Unregister When Reboot ................................................................................................................................................... 499

100 Reliable Retransmission ............................................................................................................................................. 500

Reboot in Talking .................................................................................................................................................................. 502

Answer By Hand .................................................................................................................................................................... 504

USB Recording ....................................................................................................................................................................... 505

CSTA Control ........................................................................................................................................................................... 506

Quick Login .............................................................................................................................................................................. 507

CFG File Version Information Customization ............................................................................................................ 509

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Table of Contents

Configuring Advanced Features ............................................... 511

Remote Phone Book ............................................................................................................................................................ 512

Customizing Remote Phone Book Template File ........................................................................................... 512

Lightweight Directory Access Protocol (LDAP) ......................................................................................................... 519

Busy Lamp Field (BLF) .......................................................................................................................................................... 532

BLF Subscription ........................................................................................................................................................... 533

Visual Alert and Audio Alert for BLF Pickup ..................................................................................................... 537

BLF LED Mode ............................................................................................................................................................... 540

Configuring BLF LED Status and BLF DSS Key Behavior .............................................................................. 543

Configuring a BLF DSS Key ...................................................................................................................................... 556

Using BLF DSS Key to Initiate an Intercom Call .............................................................................................. 559

Busy Lamp Field (BLF) List ................................................................................................................................................. 561

Hide Feature Access Codes ............................................................................................................................................... 567

Automatic Call Distribution (ACD) ................................................................................................................................. 568

Shared Call Appearance (SCA) ......................................................................................................................................... 574

Bridge Lines Appearance (BLA) ....................................................................................................................................... 582

Message Waiting Indicator (MWI) ................................................................................................................................. 585

Short Message Service (SMS) .......................................................................................................................................... 590

Multicast Paging .................................................................................................................................................................... 591

Sending RTP Stream ................................................................................................................................................... 592

Receiving RTP Stream ................................................................................................................................................ 601

Dsskey Recording (Record and URL Record) ............................................................................................................ 607

Hot Desking ............................................................................................................................................................................. 614

Logon Wizard ......................................................................................................................................................................... 618

Action URL ............................................................................................................................................................................... 622

Action URI ................................................................................................................................................................................ 641

Configuring Trusted IP Address for Action URI .............................................................................................. 645

Scenario A - Capturing the Current Screen of the Phone .......................................................................... 648

Scenario B - Placing a Call via Web User Interface ........................................................................................ 649

Server Redundancy............................................................................................................................................................... 650

Server Domain Name Resolution .......................................................................................................................... 665

Static DNS Cache................................................................................................................................................................... 669

Real-Time Transport Protocol (RTP) Ports .................................................................................................................. 677

TR-069 Device Management ............................................................................................................................................ 679

XML Browser ........................................................................................................................................................................... 685

Enhanced DSS Keys .............................................................................................................................................................. 688

Some Guidelines for Configuring Enhanced DSS Keys ................................................................................ 688

Understanding Macro Action Strings .................................................................................................................. 688

Configuring EDK Feature .......................................................................................................................................... 693

Configuring EDK List................................................................................................................................................... 695

Configuring EDK Prompt .......................................................................................................................................... 696

Configuring EDK Soft Keys ...................................................................................................................................... 698

Configuring a Custom Key ....................................................................................................................................... 707

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Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series IP Phones

Example Macros ........................................................................................................................................................... 710

Configuring Audio Features ...................................................... 713

Redial Tone .............................................................................................................................................................................. 713

Ring Tones ............................................................................................................................................................................... 714

Distinctive Ring Tones ......................................................................................................................................................... 719

Tones .......................................................................................................................................................................................... 726

Voice Mail Tone ..................................................................................................................................................................... 734

Ringer Device for Headset ................................................................................................................................................ 735

Handset/Headset/Speakerphone Mode ..................................................................................................................... 737

Headset Prior .......................................................................................................................................................................... 739

Dual Headset ........................................................................................................................................................................... 740

Sending Volume .................................................................................................................................................................... 742

Ringer Volume ........................................................................................................................................................................ 744

Audio Codecs .......................................................................................................................................................................... 745

Supported Audio Codecs ......................................................................................................................................... 745

Packetization Time (PTime) ..................................................................................................................................... 751

Acoustic Clarity Technology ............................................................................................................................................. 754

Acoustic Echo Cancellation (AEC) ......................................................................................................................... 754

Background Noise Suppression (BNS) ................................................................................................................ 755

Automatic Gain Control (AGC) ............................................................................................................................... 755

Voice Activity Detection (VAD) .............................................................................................................................. 755

Comfort Noise Generation (CNG) ......................................................................................................................... 757

Jitter Buffer ..................................................................................................................................................................... 758

DTMF .......................................................................................................................................................................................... 762

Methods of Transmitting DTMF Digit ................................................................................................................. 763

Suppress DTMF Display ............................................................................................................................................ 768

Transfer via DTMF ........................................................................................................................................................ 770

Play Local DTMF Tone ............................................................................................................................................... 772

Voice Quality Monitoring (VQM) .................................................................................................................................... 773

RTCP-XR ........................................................................................................................................................................... 774

VQ-RTCPXR .................................................................................................................................................................... 775

Configuring Security Features .................................................. 793

User and Administrator Passwords................................................................................................................................ 793

Auto Logout Time ................................................................................................................................................................. 795

Phone Lock .............................................................................................................................................................................. 796

Transport Layer Security (TLS) ......................................................................................................................................... 804

Secure Real-Time Transport Protocol (SRTP) ............................................................................................................ 814

Encrypting and Decrypting Files ..................................................................................................................................... 817

Configuration Parameters ........................................................................................................................................ 817

Encrypting and Decrypting Configuration Files .............................................................................................. 822

Encrypting and Decrypting Contact Files .......................................................................................................... 825

Table of Contents

Incoming Signaling Validation ........................................................................................................................................ 825

Troubleshooting ......................................................................... 829

Troubleshooting Methods ................................................................................................................................................ 829

Viewing Log Files ......................................................................................................................................................... 829

Capturing Packets ........................................................................................................................................................ 843

Enabling Watch Dog Feature .................................................................................................................................. 846

Getting Information from Status Indicators ..................................................................................................... 847

Analyzing Configuration Files ................................................................................................................................. 847

Exporting All the Diagnostic Files ......................................................................................................................... 850

Ping and Traceroute ................................................................................................................................................... 851

Troubleshooting Solutions ................................................................................................................................................ 853

IP Address Issues.......................................................................................................................................................... 853

Time and Date Issues ................................................................................................................................................. 854

Display Issues ................................................................................................................................................................ 855

Phone Book Issues ...................................................................................................................................................... 855

Audio Issues ................................................................................................................................................................... 855

Wi-Fi and Bluetooth Issues ...................................................................................................................................... 856

Firmware and Upgrading Issues ............................................................................................................................ 857

Provisioning Issues ...................................................................................................................................................... 858

System Log Issues ....................................................................................................................................................... 859

Resetting Issues ............................................................................................................................................................ 859

Rebooting Issues .......................................................................................................................................................... 863

Protocols and Ports Issues ....................................................................................................................................... 866

Password Issues ............................................................................................................................................................ 869

Logo Issues ..................................................................................................................................................................... 869

Power and Startup Issues ......................................................................................................................................... 869

Other Issues ................................................................................................................................................................... 870

Appendix..................................................................................... 873

Appendix A: Glossary ........................................................................................................................................................... 873

Appendix B: Time Zones .................................................................................................................................................... 875

Appendix C: Trusted Certificates .................................................................................................................................... 876

Appendix D: Configuring DSS Keys ............................................................................................................................... 879

Appendix E: Auto Provisioning Flowchart (Keep User Personalized Configuration Settings) .............. 899

Appendix F: Static Settings ............................................................................................................................................... 900

Appendix G: Reading Icons ............................................................................................................................................... 901

Appendix H: SIP (Session Initiation Protocol)............................................................................................................ 912

RFC and Internet Draft Support ............................................................................................................................. 912

SIP Request..................................................................................................................................................................... 915

SIP Header ...................................................................................................................................................................... 916

SIP Responses ............................................................................................................................................................... 917

SIP Session Description Protocol (SDP) Usage ................................................................................................ 920

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Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series IP Phones

Appendix I: SIP Call Flows .................................................................................................................................................. 920

Successful Call Setup and Disconnect ................................................................................................................ 921

Unsuccessful Call Setup—Called User is Busy .................................................................................................. 923

Unsuccessful Call Setup—Called User Does Not Answer ............................................................................ 925

Successful Call Setup and Call Hold .................................................................................................................... 927

Successful Call Setup and Call Waiting .............................................................................................................. 930

Call Transfer without Consultation ....................................................................................................................... 934

Call Transfer with Consultation .............................................................................................................................. 938

Always Call Forward .................................................................................................................................................... 943

Busy Call Forward ........................................................................................................................................................ 945

No Answer Call Forward ........................................................................................................................................... 948

Call Conference ............................................................................................................................................................ 951

Index ........................................................................................... 956

xxii

Product Overview

Expansion Module

Phone Model

EXP20

SIP-T29G/T27P/T27G

EXP40

SIP-T48G/T48S/T46G/T46S

EXP50

SIP-T54S/T52S

This chapter contains the following information about IP phones:

 SIP IP Phone Models

 Expansion Modules

SIP IP Phone Models

This section introduces SIP-T54S, SIP-T52S, SIP-T48G/S, SIP-T46G/S, SIP-T42G/S, SIP-T41P/S,

SIP-T40P/G, SIP-T29G, SIP-T27P/G, SIP-T23P/G, SIP-T21(P) E2 and SIP-T19(P) E2 IP phone

models. These IP phones are endpoints in the overall network topology, which are designed to

interoperate with other compatible equipments including application servers, media servers,

internet-working gateways, voice bridges, and other endpoints. These IP phones are

characterized by a large number of functions, which simplify business communication with a

high standard of security and can work seamlessly with a large number of SIP PBXs.

Product Overview

These IP phones provide a powerful and flexible IP communication solution for Ethernet TCP/IP

networks, delivering excellent voice quality. The high-resolution graphic display supplies

content in multiple languages for system status, call log and directory access. IP phones also

support advanced functionalities, including LDAP, Busy Lamp Field, Sever Redundancy and

Network Conference.

IP phones comply with the SIP standard (RFC 3261), and they can only be used within a network

that supports this model of phone.

Expansion Modules

This section introduces EXP20, EXP40 and EXP50 expansion modules. The expansion modules

are consoles you can connect to Yealink IP phones to add DSS keys, which can be used to assign

predefined functionalities for quickly accessing features. If you want to configure the expansion

module keys, you have to connect the expansion module(s) to the IP phone in advance.

The following table lists the supported IP phone models for these expansion modules:

Expansion modules enable you to handle large volume of calls on a regular basis and expand

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series IP Phones

the functional capability of your IP phone. For more information on how to connect and use the

expansion module, refer to

Yealink EXP-specific user guide

Getting Started

This chapter describes where Yealink IP phones fit in your network and provides basic

installation instructions of IP phones.

This chapter provides the following sections:

 What IP Phones Need to Meet

 Yealink IP Phones in a Network

 Initialization Process Overview

 Verifying Startup

What IP Phones Need to Meet

Getting Started

In order to operate as SIP endpoints in your network successfully, IP phones must meet the

following requirements:

 A working IP network is established.

 VoIP gateways are configured for SIP.

 The latest (or compatible) firmware of IP phones is available.

 A call server is active and configured to receive and send SIP messages.

Yealink IP Phones in a Network

Most Yealink IP phones connect physically through a Category 5E (CAT5E) cable to a

10/100/1000Mbps Ethernet LAN, and send and receive all data using the same packet-based

technology. Some phones (for example, SIP-T48G) can connect to the wireless network.

Since the IP phone is a data terminal, digitized audio being just another type of data from its

perspective, the phone is capable of vastly more than traditional business phones. Moreover,

Yealink IP phones run the same protocols as your office personal computer, which means that

many innovative applications can be developed without resorting to specialized technology.

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series IP Phones

There are many ways to set up a phone network using Yealink IP phones. The following shows

an example of a network setup:

Initialization Process Overview

The initialization process of the IP phone is responsible for network connectivity and operation

of the IP phone in your local network.

Once you connect your IP phone to the network and to an electrical supply, the IP phone begins

its initialization process.

Getting Started

During the initialization process, the following events take place:

Loading the ROM file

The ROM file resides in the flash memory of the IP phone. The IP phone comes from the factory

with a ROM file preloaded. During initialization, the IP phone runs a bootstrap loader that loads

and executes the ROM file.

Configuring the VLAN

If the IP phone is connected to a switch, the switch notifies the IP phone of the VLAN

information defined on the switch (if using LLDP or CDP). The IP phone can then proceed with

the DHCP request for its network settings (if using DHCP). For more information on VLAN, refer

to VLAN on page 37.

Querying the DHCP (Dynamic Host Configuration Protocol) Server

The IP phone is capable of querying a DHCP server. DHCP is enabled on the IP phone by default.

The following network parameters can be obtained from the DHCP server during initialization:

 IP Address

 Subnet Mask

 Default Gateway

 Primary DNS (Domain Name Server)

 Secondary DNS

You need to configure network parameters of the IP phone manually if any of them is not

supplied by the DHCP server. For more information on configuring network parameters

manually, refer to Configuring Network Parameters Manually on page 18.

Contacting the provisioning server

If the IP phone is configured to obtain configurations from the provisioning server, it will

connect to the provisioning server, download the boot file(s) and configuration file(s) during

startup. The IP phone will be able to resolve and update configurations written in the

configuration file(s). If the IP phone does not obtain configurations from the provisioning server,

the IP phone will use configurations stored in the flash memory. For more information, refer to

Setting Up Your Phones with a Provisioning Server on page 89.

Updating firmware

If the access URL of firmware is defined in the configuration file, the IP phone will download

firmware from the provisioning server. If the MD5 value of the downloaded firmware file differs

from that of the image stored in the flash memory, the IP phone will perform a firmware update.

You can manually upgrade firmware if the IP phone does not download firmware from the

provisioning server. For more information, refer to Upgrading Firmware on page 111.

Downloading the resource files

In addition to configuration file(s), the IP phone may require resource files before it can deliver

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series IP Phones

service. These resource files are optional, but if some particular features are being deployed,

these files are required.

The followings show examples of resource files:

 Language packs

 Ring tones

 Contact files

For more information on resource files, refer to Resource Files on page 103.

Verifying Startup

After connected to the power and network, the IP phone begins the initializing process by

cycling through the following steps:

1. The power indicator LED illuminates solid red.

2. The message “Welcome Initializing… please wait” appears on the LCD screen when the IP

phone starts up.

3. The main LCD screen displays the following:

 Time and date

 Soft key labels

4. Press the OK/√ key or press Menu->Status to check the IP phone status, the LCD screen

displays the valid IP address, MAC address, firmware version, and so on.

If the IP phone has successfully passed through these steps, it starts up properly and is ready for

use.

Setting Up Your System

This section describes essential information on how to set up your phone network and set up your

phones with a provisioning server. It also provides instructions on how to set up a provisioning

server, how to deploy Yealink IP phones from the provisioning server, how to upgrade firmware,

and how to keep user personalized settings after auto provisioning.

This chapter provides the following sections:

 Setting Up Your Phone Network

 Setting Up Your Phones with a Provisioning Server

Setting Up Your Phone Network

Yealink IP phones operate on an Ethernet local area network (LAN) or wireless network. Local

area network design which varies by organization and Yealink IP phones can be configured to

accommodate a number of network designs.

In order to get your IP phones running, you must perform basic network setup, such as IP

address and subnet mask configuration. You can configure the IPv4 or IPv6 network parameters

for the phone. You can also configure the appropriate security (VLAN and/or 802.1X

authentication) and Quality of Service (QoS) settings for the IP phone.

This chapter describes how to configure all the network parameters for IP phones, and it

provides the following sections:

 DHCP

 DHCP Option

 Configuring Network Parameters Manually

 Configuring Transmission Methods of the Internet Port and PC Port

 Configuring PC Port Mode

 Web Server Type

 Wi-Fi

 VLAN

 IPv6 Support

 VPN

 Network Address Translation (NAT)

 Quality of Service (QoS)

 802.1X Authentication

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series IP Phones

Central Provisioning

(Configuration File)

<MAC>.cfg

Configure DHCP on the IP phone.

Parameter:

static.network.internet_port.type

Web User Interface

Configure DHCP on the IP phone.

Navigate to:

http://<phoneIPAddress>/servlet?p=network

&q=load

Phone User Interface

Configure DHCP on the IP phone.

Parameter

Permitted Values

Default

static.network.internet_port.type

0 or 2

Description:

Configures the Internet port type for IPv4.

0-DHCP

2-Static IP Address

Note: It works only if the value of the parameter “static.network.ip_address_mode” is set to 0

(IPv4) or 2 (IPv4 & IPv6). If you change this parameter, the IP phone will reboot to make the

change take effect.

Web User Interface:

Network->Basic->IPv4 Config

Phone User Interface:

Menu->Advanced (default password: admin) ->Network->WAN Port->IPv4

DHCP

DHCP (Dynamic Host Configuration Protocol) is a network protocol used to dynamically allocate

network parameters to network hosts. The automatic allocation of network parameters to hosts

eases the administrative burden of maintaining an IP network. IP phones comply with the DHCP

specifications documented in RFC 2131. If using DHCP, IP phones connected to the network

become operational without having to be manually assigned IP addresses and additional

network parameters.

Procedure

DHCP can be configured using the following methods.

Details of Configuration Parameter:

+ 951 hidden pages

Yealink SIP-T2 Series, SIP-T19 E2 Series, SIP-T19P E2 Series, SIP-T4 Series, SIP-T5 Series Administrator's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Introduction

About This Guide

Chapters in This Guide

Related Documentations

Conventions Used in Yealink Documentations

Reading the Configuration Parameter Tables

Summary Table Format

Configuration Parameter Table Format

Recommended References

Understanding VoIP Principle and SIP Components

VoIP Principle

SIP Components

Table of Contents

Product Overview

SIP IP Phone Models

Expansion Modules

Getting Started

What IP Phones Need to Meet

Yealink IP Phones in a Network

Initialization Process Overview

Verifying Startup

Setting Up Your System

Setting Up Your Phone Network

DHCP