Yealink SIP-T2 Series Service manual

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Copyright
Copyright © 2017 YEALINK(XIAMEN) NETWORK TECHNOLOGY
Copyright © 2017 Yealink (Xiamen) Network Technology CO., LTD. All rights reserved. No parts of this
publication may be reproduced or transmitted in any form or by any means, electronic or mechanical,
photocopying, recording, or otherwise, for any purpose, without the express written permission of
Yealink (Xiamen) Network Technology CO., LTD. Under the law, reproducing includes translating into
another language or format.
When this publication is made available on media, Yealink (Xiamen) Network Technology CO., LTD. gives
its consent to downloading and printing copies of the content provided in this file only for private use
but not for redistribution. No parts of this publication may be subject to alteration, modification or
commercial use. Yealink (Xiamen) Network Technology CO., LTD. will not be liable for any damages
arising from use of an illegally modified or altered publication.
Trademarks
Yealink®, the logo and the name and marks is trademark of Yealink (Xiamen) Network Technology CO.,
LTD, which are registered legally in China, the United States, EU (European Union) and other countries.
All other trademarks belong to their respective owners. Without Yealink’s express written permission,
recipient shall not reproduce or transmit any portion hereof in any form or by any means, with any
purpose other than personal use.
Warranty
(1) Warranty
THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS GUIDE ARE SUBJECT TO
CHANGE WITHOUT NOTICE. ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS
GUIDE ARE BELIEVED TO BE ACCURATE AND PRESENTED WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED. USERS MUST TAKE FULL RESPONSIBILITY FOR THEIR APPLICATION OF PRODUCTS.
(2) Disclaimer
YEALINK (XIAMEN) NETWORK TECHNOLOGY CO., LTD. MAKES NO WARRANTY OF ANY KIND WITH
REGARD TO THIS GUIDE, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Yealink (Xiamen) Network Technology
CO., LTD. shall not be liable for errors contained herein nor for incidental or consequential damages in
connection with the furnishing, performance, or use of this guide.
(3) Limitation of Liability
Yealink and/or its respective suppliers are not responsible for the suitability of the information contained
in this document for any reason. The information is provided “as is”, and Yealink does not provide any
warranty and is subject to change without notice. All risks other than risks caused by use of the
information are borne by the recipient. In no event, even if Yealink has been suggested the occurrence of

damages that are direct, consequential, incidental, special, punitive or whatsoever (Including but not
limited to loss of business profit, business interruption or loss of business information), shall not be liable
for these damages.
End User License Agreement
This End User License Agreement ("EULA") is a legal agreement between you and Yealink. By installing,
copying or otherwise using the Products, you: (1) agree to be bounded by the terms of this EULA, (2) you
are the owner or an authorized user of the device, and (3) you represent and warrant that you have the
right, authority and capacity to enter into this agreement and to abide by all its terms and conditions, just
as if you had signed it. The EULA for this product is available on the Yealink Support page for the product.
Patent Information
China, the United States, EU (European Union) and other countries are protecting one or more patents of
accompanying products and/or patents being applied by Yealink.
Customer Feedback
We are striving to improve our documentation quality and we appreciate your feedback. Email your
opinions and comments to [email protected].
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Visit Yealink WIKI (http://support.yealink.com/) for the latest firmware, guides, FAQ, Product documents,
and more. For better service, we sincerely recommend you to use Yealink Ticketing system
(https://ticket.yealink.com) to submit all your technical issues.

GNU GPL INFORMATION
Yealink IP phone firmware contains third-party software under the GNU General Public License (GPL). Yealink uses
software under the specific terms of the GPL. Please refer to the GPL for the exact terms and conditions of the license.
The original GPL license, source code of components licensed under GPL and used in Yealink products can be
downloaded from Yealink web site:
http://www.yealink.com/GPLOpenSource.aspx?BaseInfoCateId=293&NewsCateId=293&CateId=293.

Introduction
v
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
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: [phone].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.

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series IP Phones
vi
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).
Related Documentations
This guide covers 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 phones. The
following related documents are available:
Quick Start Guides, which describe how to assemble IP phones and configure the most
basic features available on IP phones.
User Guides, which describe how to configure and use the basic and advanced features
available on IP phones via phone user interface or via web user interface.
Auto Provisioning Guide, which describes how to provision IP phones using the boot file
and configuration files.
The purpose of Auto Provisioning Guide is to serve as a basic guidance for provisioning
Yealink IP phones with a provisioning server. If you are new to this process, it is helpful to
read this guide.
Description of Configuration Parameters in CFG Files, which describes all configuration
parameters in configuration files.
Note that Yealink administrator guide contains most of parameters. If you want to find out
more parameters which are not listed in this guide, please refer to Description of
Configuration Parameters in CFG Files guide.
y000000000000.boot template boot file.
<y0000000000xx>.cfg and <MAC>.cfg template configuration files.
IP Phones Deployment Guide for BroadSoft UC-One Environments, which describes how to
configure BroadSoft features on the BroadWorks web portal and IP phones.
IP Phone Features Integrated with BroadSoft UC-One User Guide, which describes how to
configure and use IP phone features integrated with BroadSoft UC-One on Yealink IP
phones.
When the SIP server type is set to BroadSoft, please refer to these two guides to have a
better knowledge of configuring and using features integrated with Broadsoft UC-One.
For support or service, please contact your Yealink reseller or go to Yealink Technical Support
online: http://support.yealink.com/.

Introduction
vii
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 (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 ).
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
of the configuration parameters that you configure to make the features work.

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series IP Phones
viii
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 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
ix
Configuration Parameter Table Format
The following configuration parameter table describes the parameter that you can configure to
make the feature (for example, 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 (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
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 IP Phones
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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 in the MAC.cfg file and then configure it as required (for example,
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 (for
example, 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 (for example, Account->Basic->Auto
Answer) to configure it as required.