Yealink SIP-T52S, SIPT40P/G, SIP-T42G/S, SIP-T41P/S, SIP-T29G Administrator's Manual

...

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GNU GPL INFORMATION

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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

will help 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 will help 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



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 81 or higher. The

firmware format is like x.x.x.x.rom. The second x from left must be greater than or equal to 81

(e.g., the firmware version of SIP-T46G IP phone: 28.81.0.20.rom).

See the

Yealink Products Regulatory Notices guide

for all regulatory and safety guidance.

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.

 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.

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

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones

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 (e.g., DSS keys, reading icons).

Conventions Used in Yealink Documentations

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:

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 (e.g., Click on

Settings->Upgrade.).

Also used to emphasize text (e.g., Important!).

Italics

Used to show the format of examples (e.g.,

http(s)://[IPv6

address]

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

documentations available on the Yealink Technical Support

Website (e.g.,

Triggering the IP phone to Perform the Auto

Provisioning

Blue Text

Used for cross references to other sections within this

documentation (e.g., refer to Ring Tones on page 819), for

hyperlinks to non-Yealink websites (e.g., 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 (e.g.,

Yealink SIP IP Phones Auto Provisioning Guide_V81

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

information:

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.

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

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones

viii

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

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 types of provisioning methods available for

each feature will vary; 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 138. 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

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

feature.auto_answer_delay

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.

Introduction

Configuration Parameter Table Format

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

make the feature (e.g., auto answer) work.

Note

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

Method 1: Central Provisioning

This table specifies the details of

account.X.auto_answer

parameter, which enables or disables

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

account.X.auto_answer

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 (e.g., 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 and

Sometimes you will see the words “Refer to the following content” in the Permitted Values or 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 cannot be configured via web/phone user interface.

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones

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

in the MAC.cfg file and then configure it as required (e.g.,

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

locate the

account.1.sip_server.1.address

in the MAC.cfg file and configure it as required (e.g.,

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

The following shows a segment of MAC.cfg file:

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 (e.g., 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 135.

Method 3: Phone User Interface

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

the phone path (e.g., 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/CP860/CP920 IP Phones

xii

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

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

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

browser.

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

other IP phones, refer to

Yealink phone-specific user guide

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

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.

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

xiii

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

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones

xiv

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.

Summary of Changes

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

Changes for Release 81, Guide Version 81.91

Documentations of the newly released CP920 IP phones have been added.

The following section is new for this version:

 Touch Tone on page 826

 Off Hook Contact Dialing on page 333

 Noise Suppression on page 888

 Smart Noise Block on page 889

Major updates have occurred to the following sections:

 Softkey Layout on page 287

 Bluetooth on page 209

 Local Conference on page 471

Changes for Release 81, Guide Version 81.90

The following section is new for this version:

 Ringer Volume on page 853

Major updates have occurred to the following sections:

 Physical Features of IP Phones on page 1

 Key Features of IP Phones on page 15

 Connecting the Optional USB Flash Drive (Only Applicable to SIP-

T54S/T52S/T48G/T48S/T46G/T46S/T42S/T41S/T29G/T27G/CP860/CP920 IP phones) on

page 36

Introduction

 Wi-Fi on page 70

 Bluetooth on page 209

 Call Recording on page 575

 Audio Codecs on page 854

 Appendix G: Reading Icons on page 1043

Changes for Release 81, Guide Version 81.71

Documentations of the newly released SIP-T54S/T52S, CP860 IP phones and EXP50 color-

screen expansion modules have been added.

The following sections are new for this version:

 Connecting the Optional Expansion PSTN Box CPN10 (Only Applicable to CP860/CP920 IP

Phones) on page 39

 Linekey Length in Short on page 221

 PSTN Account on page 233

 Idle Recording on page 577

 Cloud on page 581

Major updates have occurred to the following sections:

 Missed Call Log on page 347

 Auto Answer on page 385

 Call Recording on page 575

 Ring Tones on page 820

Changes for Release 81, Guide Version 81.70

Documentations of the newly released SIP-T40G IP phones have been added.

The following sections are new for this version:

 Page Switch Key on page 213

 Backing up the Call Log on page 343

Major updates have occurred to the following sections:

 Upgrading Firmware from the Provisioning Server on page 149

 Power Indicator LED on page 171

 Label Length on page 218

 Call Display on page 242

 Directory List on page 334

 Search Source List In Dialing on page 338

 Missed Call Log on page 347

 Customizing a Local Contact File on page 350

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones

xvi

 Auto Answer on page 385

 Do Not Disturb (DND) on page 409

 Call Forward on page 445

 Call Park on page 518

 Lightweight Directory Access Protocol (LDAP) on page 591

 Visual Alert and Audio Alert for BLF Pickup on page 611

 Busy Lamp Field (BLF) List on page 635

 Receiving RTP Stream on page 692

 Action URI on page 739

 Ring Tones on page 820

 Audio Codecs on page 854

 Jitter Buffer on page 884

 Transport Layer Security (TLS) on page 938

 Local Logging on page 964

 Syslog on page 972

Changes for Release 81, Guide Version 81.20

Major updates have occurred to the following sections:

 Wallpaper on page 182

 Screen Saver on page 191

Changes for Release 81, Guide Version 81.15

Documentations of the newly released SIP-T48S, SIP-T46S, SIP-T42S, SIP-T41S and SIP-T27G IP

phones have been added.

The following section is new for this version:

 Transparency on page 189

Major updates have occurred to the following sections:

 VPN on page 97

 Upgrading Firmware from the Provisioning Server on page 149

 Wallpaper on page 182

 Screen Saver on page 191

 Power Saving on page 199

 Backlight on page 203

 Account Registration on page 223

 Time and Date on page 248

 Language on page 267

Introduction

xvii

 Customizing Softkey Layout Template File on page 289

 Dial Plan using Digit Map String Rules on page 315

 Call Number Filter on page 516

 Calling Line Identification Presentation (CLIP) on page 532

 Intercom on page 543

 Lightweight Directory Access Protocol (LDAP) on page 591

 Visual Alert and Audio Alert for BLF Pickup on page 611

 Server Redundancy on page 749

 Audio Codecs on page 854

 Methods of Transmitting DTMF Digit on page 891

 Appendix C: Trusted Certificates on page 1012

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones

xviii

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

Summary of Changes ............................................................................................................................................................ xiv

Changes for Release 81, Guide Version 81.91 ................................................................................................... xiv

Changes for Release 81, Guide Version 81.90 ................................................................................................... xiv

Changes for Release 81, Guide Version 81.71 .................................................................................................... xv

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

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

Changes for Release 81, Guide Version 81.15 ................................................................................................... xvi

Table of Contents ...................................................................... xviii

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

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

Physical Features of IP Phones .................................................................................................................................... 1

Key Features of IP Phones .......................................................................................................................................... 15

Expansion Modules ................................................................................................................................................................ 17

Getting Started ............................................................................. 21

What IP Phones Need to Meet .......................................................................................................................................... 21

Yealink IP Phones in a Network ........................................................................................................................................ 21

Connecting the IP Phones ................................................................................................................................................... 22

Attaching the Stand and the Optional Wall Mount Bracket (not Applicable to CP860/CP920 IP

phones) .............................................................................................................................................................................. 23

Connecting the Handset and Optional Headset (not Applicable to CP860/CP920 IP phones) ... 31

Connecting the Power and Network ..................................................................................................................... 33

Table of Contents

xix

Connecting the Optional USB Flash Drive (Only Applicable to SIP-

T54S/T52S/T48G/T48S/T46G/T46S/T42S/T41S/T29G/T27G/CP860/CP920 IP phones)................... 36

Connecting the Optional Expansion Microphones (Only Applicable to CP860 IP Phones) ........... 38

Connecting the Optional PC or Mobile Device (only applicable to CP860 IP phones) .................... 38

Connecting the Optional Expansion PSTN Box CPN10 (Only Applicable to CP860/CP920 IP

Phones) .............................................................................................................................................................................. 39

Initialization Process Overview .......................................................................................................................................... 41

Verifying Startup ..................................................................................................................................................................... 42

Setting Up Your System .............................................................. 45

Setting Up Your Phone Network ...................................................................................................................................... 45

DHCP ................................................................................................................................................................................... 46

DHCP Option ................................................................................................................................................................... 50

Configuring Network Parameters Manually ....................................................................................................... 56

Configuring Transmission Methods of the Internet Port and PC Port .................................................... 61

Configuring PC Port Mode ........................................................................................................................................ 65

Web Server Type ............................................................................................................................................................ 66

Wi-Fi .................................................................................................................................................................................... 70

VLAN ................................................................................................................................................................................... 76

IPv6 Support .................................................................................................................................................................... 88

VPN ...................................................................................................................................................................................... 97

Network Address Translation (NAT) .................................................................................................................... 100

Quality of Service (QoS) ............................................................................................................................................ 118

802.1X Authentication ............................................................................................................................................... 121

Setting Up Your Phones with a Provisioning Server .............................................................................................. 132

Provisioning Points to Consider ............................................................................................................................ 132

Provisioning Methods ................................................................................................................................................ 133

Boot Files, Configuration Files and Resource Files ........................................................................................ 136

Setting Up a Provisioning Server .......................................................................................................................... 145

Upgrading Firmware ................................................................................................................................................... 148

Keeping User Personalized Settings after Auto Provisioning ................................................................... 158

Configuring Basic Features ....................................................... 169

Power Indicator LED ............................................................................................................................................................. 171

Notification Popups ............................................................................................................................................................. 177

Contrast ..................................................................................................................................................................................... 180

Wallpaper ................................................................................................................................................................................. 182

Transparency ........................................................................................................................................................................... 189

Screen Saver ............................................................................................................................................................................ 191

Power Saving .......................................................................................................................................................................... 199

Backlight ................................................................................................................................................................................... 203

Idle Clock Display .................................................................................................................................................................. 208

Bluetooth .................................................................................................................................................................................. 209

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones

Page Switch Key ..................................................................................................................................................................... 213

Enable Page Tips ................................................................................................................................................................... 214

Page Tips for Expansion Module .................................................................................................................................... 216

Label Length ............................................................................................................................................................................ 218

Linekey Length in Short ...................................................................................................................................................... 221

Account Registration ........................................................................................................................................................... 223

SIP Account .................................................................................................................................................................... 225

PSTN Account................................................................................................................................................................ 233

Multiple Line Keys per Account ...................................................................................................................................... 235

Multiple Call Appearances ................................................................................................................................................ 241

Call Display .............................................................................................................................................................................. 242

Display Method on Dialing ............................................................................................................................................... 247

Time and Date ........................................................................................................................................................................ 248

NTP Time Server ........................................................................................................................................................... 250

Time and Date Settings ............................................................................................................................................. 255

Daylight Saving Time (DST) ..................................................................................................................................... 260

Language .................................................................................................................................................................................. 267

Loading Language Packs .......................................................................................................................................... 267

Specifying the Language to Use............................................................................................................................ 275

Input Method .......................................................................................................................................................................... 277

Keypad Input Method Customization ................................................................................................................. 277

Specifying the Default Input Method.................................................................................................................. 281

Logo Customization ............................................................................................................................................................. 282

Customizing a Logo Template File ....................................................................................................................... 283

Configuring the Logo Shown on the Idle Screen ........................................................................................... 284

Softkey Layout ........................................................................................................................................................................ 287

Customizing Softkey Layout Template File ....................................................................................................... 289

Key As Send ............................................................................................................................................................................. 296

Dial Plan .................................................................................................................................................................................... 299

Dial Plan using XML Template Files ..................................................................................................................... 300

Dial Plan using Digit Map String Rules ............................................................................................................... 315

Emergency Dialplan ............................................................................................................................................................. 324

Hotline ....................................................................................................................................................................................... 329

Off Hook Hot Line Dialing ................................................................................................................................................. 331

Off Hook Contact Dialing .................................................................................................................................................. 333

Directory List ........................................................................................................................................................................... 334

Customizing a Directory Template File .............................................................................................................. 335

Search Source List In Dialing ............................................................................................................................................ 338

Customizing a Super Search Template File ...................................................................................................... 338

Call Log ...................................................................................................................................................................................... 341

Save Call Log ................................................................................................................................................................. 341

Backing up the Call Logs .......................................................................................................................................... 343

Call List Show Number ........................................................................................................................................................ 345

Missed Call Log ...................................................................................................................................................................... 347

Table of Contents

xxi

Local Directory ....................................................................................................................................................................... 350

Customizing a Local Contact File .......................................................................................................................... 350

Configuring Local Directory .................................................................................................................................... 363

Backing up the Local Contacts ............................................................................................................................... 367

Live Dialpad ............................................................................................................................................................................. 369

Speed Dial ................................................................................................................................................................................ 371

Call Waiting ............................................................................................................................................................................. 379

Auto Redial .............................................................................................................................................................................. 383

Auto Answer ............................................................................................................................................................................ 385

IP Direct Auto Answer ......................................................................................................................................................... 393

Allow IP Call ............................................................................................................................................................................. 394

Accept SIP Trust Server Only ............................................................................................................................................ 395

Call Completion ..................................................................................................................................................................... 397

Anonymous Call ..................................................................................................................................................................... 400

Anonymous Call Rejection ................................................................................................................................................ 405

Do Not Disturb (DND) ......................................................................................................................................................... 409

Busy Tone Delay .................................................................................................................................................................... 426

Return Code When Refuse ................................................................................................................................................ 428

Early Media .............................................................................................................................................................................. 430

180 Ring Workaround ......................................................................................................................................................... 430

Use Outbound Proxy in Dialog ....................................................................................................................................... 431

SIP Session Timer .................................................................................................................................................................. 433

Session Timer .......................................................................................................................................................................... 435

Call Hold ................................................................................................................................................................................... 439

Music on Hold (MoH) ................................................................................................................................................ 443

Call Forward ............................................................................................................................................................................. 445

Call Transfer ............................................................................................................................................................................. 469

Local Conference ................................................................................................................................................................... 471

Network Conference ............................................................................................................................................................ 473

Transfer on Conference Hang Up .................................................................................................................................. 476

Feature Key Synchronization ............................................................................................................................................ 477

Transfer Mode via Dsskey.................................................................................................................................................. 479

Allow Trans Exist Call ........................................................................................................................................................... 480

Directed Call Pickup ............................................................................................................................................................. 482

Group Call Pickup ................................................................................................................................................................. 494

Dialog Info Call Pickup ........................................................................................................................................................ 506

Recent Call In Dialing .......................................................................................................................................................... 509

ReCall ......................................................................................................................................................................................... 510

Call Number Filter ................................................................................................................................................................. 516

Call Park .................................................................................................................................................................................... 518

Calling Line Identification Presentation (CLIP) .......................................................................................................... 532

Connected Line Identification Presentation (COLP) ............................................................................................... 537

Mute ........................................................................................................................................................................................... 540

Allow Mute ..................................................................................................................................................................... 540

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Keep Mute ...................................................................................................................................................................... 542

Intercom .................................................................................................................................................................................... 543

Outgoing Intercom Calls .......................................................................................................................................... 543

Incoming Intercom Calls ........................................................................................................................................... 554

Call Timeout ............................................................................................................................................................................ 557

Ringing Timeout .................................................................................................................................................................... 558

Send user=phone ................................................................................................................................................................. 559

SIP Send MAC ......................................................................................................................................................................... 561

SIP Send Line........................................................................................................................................................................... 563

Reserve # in User Name ..................................................................................................................................................... 565

Password Dial.......................................................................................................................................................................... 567

Unregister When Reboot ................................................................................................................................................... 569

100 Reliable Retransmission ............................................................................................................................................. 571

Reboot in Talking .................................................................................................................................................................. 573

Answer By Hand .................................................................................................................................................................... 574

USB Recording ....................................................................................................................................................................... 575

Call Recording ............................................................................................................................................................... 575

Idle Recording ............................................................................................................................................................... 577

CSTA Control ........................................................................................................................................................................... 578

Quick Login .............................................................................................................................................................................. 580

Cloud .......................................................................................................................................................................................... 581

Configuring Advanced Features ............................................... 583

Remote Phone Book ............................................................................................................................................................ 584

Customizing Remote Phone Book Template File ........................................................................................... 584

Lightweight Directory Access Protocol (LDAP) ......................................................................................................... 591

Busy Lamp Field (BLF) .......................................................................................................................................................... 607

BLF Subscription ........................................................................................................................................................... 607

Visual Alert and Audio Alert for BLF Pickup ..................................................................................................... 611

BLF LED Mode ............................................................................................................................................................... 614

Configuring BLF LED Status and BLF Key Behavior ....................................................................................... 617

Configuring a BLF Key................................................................................................................................................ 629

Busy Lamp Field (BLF) List ................................................................................................................................................. 635

Hide Feature Access Codes ............................................................................................................................................... 643

Automatic Call Distribution (ACD) ................................................................................................................................. 645

Shared Call Appearance (SCA) ......................................................................................................................................... 653

Bridge Lines Appearance (BLA) ....................................................................................................................................... 663

Message Waiting Indicator (MWI) ................................................................................................................................. 667

Short Message Service (SMS) .......................................................................................................................................... 672

Multicast Paging .................................................................................................................................................................... 674

Sending RTP Stream ................................................................................................................................................... 674

Receiving RTP Stream ................................................................................................................................................ 692

Dsskey Recording (Record and URL Record) ............................................................................................................ 698

Hot Desking ............................................................................................................................................................................. 708

Table of Contents

xxiii

Logon Wizard ......................................................................................................................................................................... 716

Action URL ............................................................................................................................................................................... 720

Action URI ................................................................................................................................................................................ 739

Configuring Trusted IP Address for Action URI .............................................................................................. 744

Scenario A - Capturing the Current Screen of the Phone .......................................................................... 747

Scenario B - Placing a Call via Web User Interface ........................................................................................ 748

Server Redundancy............................................................................................................................................................... 749

Server Domain Name Resolution .......................................................................................................................... 763

Static DNS Cache................................................................................................................................................................... 767

Real-Time Transport Protocol (RTP) Ports .................................................................................................................. 775

TR-069 Device Management ............................................................................................................................................ 777

XML Browser ........................................................................................................................................................................... 783

Enhanced DSS Keys .............................................................................................................................................................. 790

Some Guidelines for Configuring Enhanced DSS Keys ................................................................................ 790

Understanding Macro Action Strings .................................................................................................................. 791

Configuring EDK Feature .......................................................................................................................................... 795

Configuring EDK List................................................................................................................................................... 797

Configuring EDK Prompt .......................................................................................................................................... 799

Configuring EDK Soft Keys ...................................................................................................................................... 801

Configuring a Custom Key ....................................................................................................................................... 809

Example Macros ........................................................................................................................................................... 817

Configuring Audio Features ...................................................... 819

Redial Tone .............................................................................................................................................................................. 819

Ring Tones ............................................................................................................................................................................... 820

Touch Tone .............................................................................................................................................................................. 826

Distinctive Ring Tones ......................................................................................................................................................... 827

Tones .......................................................................................................................................................................................... 834

Voice Mail Tone ..................................................................................................................................................................... 842

Ringer Device for Headset ................................................................................................................................................ 844

Handset/Headset/Speakerphone Mode ..................................................................................................................... 846

Headset Prior .......................................................................................................................................................................... 847

Dual Headset ........................................................................................................................................................................... 849

Sending Volume .................................................................................................................................................................... 851

Ringer Volume ........................................................................................................................................................................ 853

Audio Codecs .......................................................................................................................................................................... 854

Supported Audio Codecs ......................................................................................................................................... 854

Packetization Time (PTime) ..................................................................................................................................... 876

Acoustic Clarity Technology ............................................................................................................................................. 879

Acoustic Echo Cancellation (AEC) ......................................................................................................................... 879

Background Noise Suppression (BNS) ................................................................................................................ 880

Automatic Gain Control (AGC) ............................................................................................................................... 881

Voice Activity Detection (VAD) .............................................................................................................................. 881

Comfort Noise Generation (CNG) ......................................................................................................................... 882

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones

xxiv

Jitter Buffer ..................................................................................................................................................................... 884

Noise Suppression....................................................................................................................................................... 888

Smart Noise Block ....................................................................................................................................................... 889

DTMF .......................................................................................................................................................................................... 890

Methods of Transmitting DTMF Digit ................................................................................................................. 891

Suppress DTMF Display ............................................................................................................................................ 897

Transfer via DTMF ........................................................................................................................................................ 898

DTMF Send Event Flash ............................................................................................................................................. 900

Play Local DTMF Tone ............................................................................................................................................... 902

Voice Quality Monitoring (VQM) .................................................................................................................................... 903

RTCP-XR ........................................................................................................................................................................... 904

VQ-RTCPXR .................................................................................................................................................................... 905

Configuring Security Features .................................................. 923

User and Administrator Passwords................................................................................................................................ 923

Auto Logout Time ................................................................................................................................................................. 925

Phone Lock .............................................................................................................................................................................. 926

Transport Layer Security (TLS) ......................................................................................................................................... 938

Secure Real-Time Transport Protocol (SRTP) ............................................................................................................ 949

Encrypting and Decrypting Files ..................................................................................................................................... 952

Configuration Parameters ........................................................................................................................................ 952

Encrypting and Decrypting Configuration Files .............................................................................................. 956

Encrypting and Decrypting Contact Files .......................................................................................................... 959

Incoming Signaling Validation ........................................................................................................................................ 960

Troubleshooting ......................................................................... 963

Troubleshooting Methods ................................................................................................................................................ 963

Viewing Log Files ......................................................................................................................................................... 963

Capturing Packets ........................................................................................................................................................ 978

Enabling Watch Dog Feature .................................................................................................................................. 981

Getting Information from Status Indicators ..................................................................................................... 982

Analyzing Configuration Files ................................................................................................................................. 983

Exporting All the Diagnostic Files ......................................................................................................................... 986

Ping and Traceroute ................................................................................................................................................... 987

Troubleshooting Solutions ................................................................................................................................................ 989

IP Address Issues.......................................................................................................................................................... 989

Time and Date Issues ................................................................................................................................................. 990

Display Issues ................................................................................................................................................................ 990

Phone Book Issues ...................................................................................................................................................... 991

Audio Issues ................................................................................................................................................................... 991

Wi-Fi and Bluetooth Issues ...................................................................................................................................... 992

Firmware and Upgrading Issues ............................................................................................................................ 992

Provisioning Issues ...................................................................................................................................................... 994

Table of Contents

xxv

System Log Issues ....................................................................................................................................................... 994

Resetting Issues ............................................................................................................................................................ 995

Rebooting Issues .......................................................................................................................................................... 998

Protocols and Ports Issues .................................................................................................................................... 1001

Password Issues ......................................................................................................................................................... 1004

Logo Issues .................................................................................................................................................................. 1004

Power and Startup Issues ...................................................................................................................................... 1004

Other Issues ................................................................................................................................................................ 1005

Appendix................................................................................... 1009

Appendix A: Glossary ........................................................................................................................................................ 1009

Appendix B: Time Zones ................................................................................................................................................. 1011

Appendix C: Trusted Certificates ................................................................................................................................. 1012

Appendix D: Configuring DSS Keys ............................................................................................................................ 1014

Appendix E: Auto Provisioning Flowchart (Keep User Personalized Configuration Settings) ........... 1036

Appendix F: Static Settings ............................................................................................................................................ 1037

Appendix G: Reading Icons ............................................................................................................................................ 1043

Appendix H: SIP (Session Initiation Protocol)......................................................................................................... 1053

RFC and Internet Draft Support .......................................................................................................................... 1053

SIP Request.................................................................................................................................................................. 1056

SIP Header ................................................................................................................................................................... 1057

SIP Responses ............................................................................................................................................................ 1058

SIP Session Description Protocol (SDP) Usage ............................................................................................. 1061

Appendix I: SIP Call Flows ............................................................................................................................................... 1061

Successful Call Setup and Disconnect ............................................................................................................. 1062

Unsuccessful Call Setup—Called User is Busy ............................................................................................... 1064

Unsuccessful Call Setup—Called User Does Not Answer ......................................................................... 1066

Successful Call Setup and Call Hold ................................................................................................................. 1068

Successful Call Setup and Call Waiting ........................................................................................................... 1071

Call Transfer without Consultation .................................................................................................................... 1075

Call Transfer with Consultation ........................................................................................................................... 1079

Always Call Forward ................................................................................................................................................. 1084

Busy Call Forward ..................................................................................................................................................... 1086

No Answer Call Forward ........................................................................................................................................ 1089

Call Conference ......................................................................................................................................................... 1092

Index ......................................................................................... 1097

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xxvi

Product Overview

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, SIP-T19(P) E2 ,CP860 and CP920

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.

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.

For a list of key features available on Yealink IP phones running the latest firmware, refer to Key

Features of IP Phones on page 15.

Physical Features of IP Phones

This section lists the available physical features of 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 desktop IP phones ,CP860 and CP920 IP phone models.

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones

SIP-T54S

Physical Features:

- 4.3” 480 x 272 pixel color display with backlight

- 16 VoIP accounts, Broadsoft Validated/Asterisk

Compatible

- HD Voice: HD Codec, HD Handset, HD Speaker

- 36 dedicated hard keys and 4 context-sensitive soft keys

- 1*RJ9 (4P4C) handset port

- 1*RJ9 (4P4C) headset port

- 2*RJ45 10/100/1000Mbps Ethernet ports

- 14 LEDs: 1*power, 10*line, 1*mute, 1*headset, 1*speakerphone

- Power adapter: AC 100~240V input and DC 5V/2A output

- Power over Ethernet (IEEE 802.3af)

- Built-in USB port, support wired USB headset, expansion module EXP50, USB flash drive,

wireless USB headset and Wi-Fi

- Wall Mount

- Hearing aid compatible (HAC) handset

- Bulit-in Bluetooth

Product Overview

SIP-T52S

Physical Features:

- 2.8” 320 x 240 pixel color display with backlight

- 12 VoIP accounts, Broadsoft Validated/Asterisk

Compatible

- HD Voice: HD Codec, HD Handset, HD Speaker

- 32 dedicated hard keys and 4 context-sensitive soft keys

- 1*RJ9 (4P4C) handset port

- 1*RJ9 (4P4C) headset port

- 2*RJ45 10/100/1000Mbps Ethernet ports

- 11 LEDs: 1*power, 8*line, 1*mute, 1*headset

- Power adapter: AC 100~240V input and DC 5V/2A output

- Power over Ethernet (IEEE 802.3af)

- Built-in USB port, support wired USB headset, expansion module EXP50, USB flash drive,

wireless USB headset and Wi-Fi

- Wall Mount

- Hearing aid compatible (HAC) handset

- Bulit-in Bluetooth

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones

SIP-T48G/S

Physical Features:

- 7” 800 x 480 pixel color touch screen with backlight

- 24 bit depth color

- 16 VoIP accounts, Broadsoft Validated/Asterisk® Compatible

- HD Voice: HD Codec, HD Handset, HD Speaker

- 26 dedicated hard keys

- 1*RJ9 (4P4C) handset port

- 1*RJ9 (4P4C) headset port

- 2*RJ45 10/100/1000Mbps Ethernet ports

- 1*RJ12 (6P6C) expansion module port

- 4 LEDs: 1*power, 1*mute, 1*headset, 1*speakerphone

- Power adapter: AC 100~240V input and DC 5V/2A output

- Power over Ethernet (IEEE 802.3af)

- Built-in USB port, support USB flash drive, Bluetooth headset and Wi-Fi

- Wall Mount

- Hearing aid compatible (HAC) handset (only applicable to SIP-T48S IP phones)

+ 1096 hidden pages

Yealink SIP-T52S, SIPT40P/G, SIP-T42G/S, SIP-T41P/S, SIP-T29G 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

Summary of Changes

Changes for Release 81, Guide Version 81.91

Changes for Release 81, Guide Version 81.90

Changes for Release 81, Guide Version 81.71

Changes for Release 81, Guide Version 81.70

Changes for Release 81, Guide Version 81.20

Changes for Release 81, Guide Version 81.15

Table of Contents

Product Overview

SIP IP Phone Models

Physical Features of IP Phones