Yealink SIP-T38G Service manual

T3xG
Administrator Guide

Copyright © 2012 YEALINK NETWORK TECHNOLOGY
Copyright © 2012 Yealink 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 Network Technology CO., LTD. Under the law, reproducing includes
translating into another language or format.
When this publication is made available on media, Yealink Network Technology CO., LTD. gives
its consent to downloading and printing copies of the content provided in this file only for private
use and not for redistribution. No parts of this publication may be subject to alteration,
modification or commercial use. Yealink Network Technology CO., LTD. will not be liable for any
damages arising from use of an illegally modified or altered publication.
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 BUT ARE PRESENTED
WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL
RESPONSIBILITY FOR THEIR APPLICATION OF PRODUCTS.
YEALINK 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 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.
Hereby, Yealink Network Technology CO., LTD. declares that this phone is in conformity
with the essential requirements and other relevant provisions of the CE, FCC.
This device is marked with the CE mark in compliance with EC Directives 2006/95/EC and 2004/108/EC.
This device is compliant with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
1. This device may not cause harmful interference, and
2. This device must accept any interferences received, including interference that may cause undesired
operation.

Note: This device is tested and complies with the limits for a Class B digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television reception, which can be determined
by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more
of the following measures:
1. Reorient or relocate the receiving antenna.
2. Increase the separation between the equipment and receiver.
3. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
4. Consult the dealer or an experience radio/TV technician for help.
To avoid the potential effects on the environment and human health as a result of the
presence of hazardous substances in electrical and electronic equipment, end users of
electrical and electronic equipment should understand the meaning of the crossed-out
wheeled bin symbol. Do not dispose of WEEE as unsorted municipal waste and have to
collect such WEEE separately.

About This Guide
v
The SIP-T3xG IP Phone Family Administrator Guide is considered to be an
administration-level version, which is intended for administrators who need to properly
configure, customize, manage, and troubleshoot the IP phone systems rather than the
end-users of the IP phones. It provides details on the functionality and configuration of
the IP phones.
Many of the features are described in this guide involving the network settings, which
could affect the IP phone’s performance in the network. So an understanding of IP
networking and prior knowledge of IP telephony concepts are necessary.
This guide covers the SIP-T38G and T32G IP phones. The following related documents for
the SIP-T3xG IP phones are available:
Quick Installation Guides, which describe how to assemble the IP phones.
Quick Reference Guides, which describe the most basic features available on the
IP phones.
User Guides, which describe the basic and advanced features available on the IP
phones.
Yealink Auto Provisioning User Guide, which describes how to auto provision the IP
phones using the configuration files.
Yealink Configuration Conversion Tool User Guide, which describes how to encrypt
the configuration files using the Configuration Conversion Tool.
<y0000000000xx>.cfg and <MAC>.cfg template configuration files.
Yealink IP Phones Deployment Guide for BroadWorks Environments, which
describes how to configure the BroadSoft features on the BroadWorks web portal
and the IP phones.
For support or service, please contact your Yealink reseller or go to Yealink Technical
Support at http://www.yealink.com/Support.aspx.
The information detailed in this guide is applicable to the firmware version 70 or higher.
The firmware format likes x.x.x.x.rom. The second x should be greater than or equal to
70. This administrator guide includes the following chapters:
Chapter 1, ―Product Overview‖describes the SIP components and SIP IP phones.

Administrator’s Guide for SIP-T3xG IP Phones
vi
Chapter 2, ―Getting Started‖describes how to install and connect the IP phones
and the IP phone interface methods.
Chapter 3, ―Configuring Basic Features‖describes how to configure the basic
features on the IP phones.
Chapter 4, ―Configuring Advanced Features‖describes how to configure the
advanced features on the IP phones.
Chapter 5, ―Configuring Audio Features‖describes how to configure the audio
features on the IP phones.
Chapter 6, ―Configuring Security Features‖describes how to configure the security
features on the IP phones.
Chapter 7, ―Upgrading the Firmware‖describes how to upgrade the firmware of
the IP phones.
Chapter 8, ―Resource Files‖describes the resource files that can be downloaded
by the IP phones.
Chapter 9, ―Troubleshooting‖describes how to troubleshoot the IP phones and
provides some common troubleshooting solutions.
Chapter 10, ―Appendix‖provides the glossary, reference information about the IP
phones compliant with RFC 3261, SIP call flows and the sample configuration files.

Table of Contents
vii
About This Guide ...................................................................... v
Documentations...............................................................................................................................v
In This Guide ....................................................................................................................................v
Table of Contents ....................................................................vii
Product Overview..................................................................... 1
VoIP Principle....................................................................................................................................1
SIP Components...............................................................................................................................2
SIP IP Phone Models........................................................................................................................3
Physical Features of the SIP-T3xG IP Phones ..........................................................................4
Key Features of the SIP-T3xG IP Phones..................................................................................5
Getting Started......................................................................... 7
Connecting the IP Phones ...............................................................................................................7
Initialization Process Overview ....................................................................................................11
Verifying Startup ............................................................................................................................12
Configuration Interfaces ...............................................................................................................12
Phone User Interface..............................................................................................................13
Web User Interface ................................................................................................................13
Configuration Files..................................................................................................................13
Reading Icons ................................................................................................................................14
Configuring Basic Network Parameters ......................................................................................16
DHCP .......................................................................................................................................16
Configuring Network Parameters Manually ........................................................................19
PPPoE .......................................................................................................................................21
Configuring PC Port Mode .....................................................................................................23
Creating Dial Plan .........................................................................................................................25
Replace Rule ...........................................................................................................................26
Dial-now ..................................................................................................................................27
Area Code...............................................................................................................................29
Block Out ................................................................................................................................. 30
Configuring Basic Features .................................................... 33
Wallpaper.......................................................................................................................................34
Screensaver ...................................................................................................................................36

Administrator’s Guide for SIP-T3xG IP Phones
viii
Backlight.........................................................................................................................................39
User Password ...............................................................................................................................41
Administrator Password ................................................................................................................42
Phone Lock .....................................................................................................................................44
Time and Date ...............................................................................................................................46
Language .......................................................................................................................................53
Loading Language Packs ......................................................................................................53
Specifying the Language to Use...........................................................................................54
Softkey Layout................................................................................................................................56
Key as Send ...................................................................................................................................59
Hotline ............................................................................................................................................61
Call Log...........................................................................................................................................62
Missed Call Log .............................................................................................................................64
Local Directory...............................................................................................................................65
Live Dialpad................................................................................................................................... 67
Call Waiting....................................................................................................................................68
Auto Redial.....................................................................................................................................70
Auto Answer...................................................................................................................................72
Call Completion.............................................................................................................................73
Anonymous Call............................................................................................................................. 75
Anonymous Call Rejection ............................................................................................................ 77
Do Not Disturb................................................................................................................................79
Busy Tone Delay.............................................................................................................................82
Return Code When Refuse ............................................................................................................83
180 Ring Workaround ....................................................................................................................85
Use Outbound Proxy in Dialog.....................................................................................................86
SIP Session Timer ...........................................................................................................................87
Session Timer .................................................................................................................................89
Call Hold.........................................................................................................................................90
Call Forward ..................................................................................................................................91
Call Transfer ...................................................................................................................................95
Network Conference .....................................................................................................................96
Transfer on Conference Hang Up ................................................................................................98
Direct Pickup .................................................................................................................................. 99
Group Pickup ...............................................................................................................................102
Dialog-Info Call Pickup................................................................................................................105
Call Return ....................................................................................................................................107
Call Park .......................................................................................................................................108
Web Server Type..........................................................................................................................109
Calling Line Identification Presentation.....................................................................................111
Connected Line Identification Presentation ..............................................................................113
DTMF.............................................................................................................................................113
Intercom........................................................................................................................................117
Outgoing Intercom Calls......................................................................................................117

Table of Contents
ix
Incoming Intercom Calls ......................................................................................................118
Configuring Advanced Features...........................................121
Distinctive Ring Tones ..................................................................................................................121
Tones .............................................................................................................................................123
Remote Phonebook .....................................................................................................................126
LDAP..............................................................................................................................................128
Busy Lamp Field...........................................................................................................................131
BLF List .......................................................................................................................................... 134
Shared Call Appearance ...........................................................................................................136
As-Feature-Event .........................................................................................................................139
Automatic Call Distribution .........................................................................................................140
Message Waiting Indicator ........................................................................................................141
Call Recording .............................................................................................................................143
Hot Desking..................................................................................................................................147
Action URL ....................................................................................................................................148
Action URI.....................................................................................................................................151
Server Redundancy.....................................................................................................................154
LLDP...............................................................................................................................................157
VLAN .............................................................................................................................................160
VPN................................................................................................................................................163
Quality of Service ........................................................................................................................165
Network Address Translation .....................................................................................................168
802.1X Authentication .................................................................................................................170
Configuring Audio Features ..................................................173
Audio Codecs ..............................................................................................................................173
Acoustic Clarity Technology........................................................................................................177
Acoustic Echo Cancellation ................................................................................................. 177
Voice Activity Detection .......................................................................................................178
Comfort Noise Generation ..................................................................................................179
Jitter Buffer ............................................................................................................................180
Configuring Security Features...............................................183
Transport Layer Security.............................................................................................................. 183
Secure Real-Time Transport Protocol..........................................................................................189
Encrypting Configuration Files ...................................................................................................191
Upgrading the Firmware.......................................................195
Resource Files........................................................................199

Administrator’s Guide for SIP-T3xG IP Phones
x
Replace Rule Template ...............................................................................................................199
Dial-now Template.......................................................................................................................200
Softkey Layout Template.............................................................................................................201
Local Contact File ........................................................................................................................203
Remote XML Phonebook.............................................................................................................204
Specifying the Access URL of Resource Files ............................................................................205
Troubleshooting.....................................................................207
Troubleshooting Methods ...........................................................................................................207
Viewing Log Files..................................................................................................................207
Capturing Packets ................................................................................................................209
Enabling the Watch Dog Feature........................................................................................210
Getting Information from Status Indicators........................................................................211
Analyzing Configuration Files .............................................................................................211
Troubleshooting Solutions ...........................................................................................................212
Why is the phone LCD screen blank? .................................................................................212
Why can the IP phone not obtain the IP address? ............................................................212
Why does the IP phone display ―No Service‖? .................................................................213
How can I know the basic information of the IP phone? ..................................................213
Why can the IP phone not upgrade successfully?.............................................................213
Why does the IP phone not display time and date correctly?.........................................213
Why do I get poor audio during a call? .............................................................................213
What is the difference between a remote phonebook and a local phonebook? ......... 214
What is the difference of user name, register name and display name? ......................214
Is there a SIP message that can make the IP phone reboot? ..........................................214
Why do IP phones use DOB format logo file instead of popular BMP, JPG and so on? 215
What can I do if I forget the administrator password? .....................................................215
How to increase the volume on Speaker & on Headset? ................................................215
What will happen if I connect both PoE cable and power adapter? Which has the higher
priority?.................................................................................................................................. 215
What is auto provisioning? ..................................................................................................215
What is PnP? ..........................................................................................................................215
Why does the IP phone not apply the configuration?.......................................................216
What is ―BLF List URI‖ used for?...........................................................................................216
What do ―on code‖ and ―off code‖ mean? .......................................................................216
How to solve the IP conflict problem? ................................................................................217
How to reset your phone to factory configurations?.........................................................217
Appendix ...............................................................................219
Appendix A: Glossary.................................................................................................................219
Appendix B: Time Zones.............................................................................................................221
Appendix C: Configuration Parameters ....................................................................................224
Setting Parameters in Configuration Files..........................................................................224

Table of Contents
xi
Basic and Advanced Parameters .......................................................................................224
Audio Features Parameters.................................................................................................299
Security Feature Parameters ...............................................................................................305
Upgrading the Firmware .....................................................................................................308
Resource Files .......................................................................................................................311
Troubleshooting ....................................................................................................................316
Configuring DSS Key ............................................................................................................317
Appendix D: SIP (Session Initiation Protocol)............................................................................ 333
RFC and Internet Draft Support ..........................................................................................333
SIP Request............................................................................................................................334
SIP Header ............................................................................................................................335
SIP Responses .......................................................................................................................336
SIP Session Description Protocol (SDP) Usage .................................................................. 339
Appendix E: SIP Call Flows .........................................................................................................340
Successful Call Setup and Disconnect ...............................................................................341
Unsuccessful Call Setup—Called User is Busy ..................................................................343
Unsuccessful Call Setup—Called User Does Not Answer ................................................347
Successful Call Setup and Call Hold..................................................................................350
Successful Call Setup and Call Waiting .............................................................................352
Call Transfer without Consultation ......................................................................................357
Call Transfer with Consultation............................................................................................361
Always Call Forward............................................................................................................367
Busy Call Forward ................................................................................................................370
No Answer Call Forward .....................................................................................................373
Call Conference.................................................................................................................... 376
Appendix F: Sample Configuration File ....................................................................................381
Index ......................................................................................387

Product Overview
1
This chapter contains the following information about the SIP-T3xG IP phones:
VoIP Principle
SIP Components
SIP IP Phone Models
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 implement.
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 worldwide 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 the 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 the attributes of an end-to-end call.

Administrator’s Guide for SIP-T3xG IP Phones
2
SIP provides the capabilities to:
Determine the location of the target endpoint -- SIP supports address resolution,
name mapping, and call redirection.
Determine the media capabilities of the target endpoint -- Via Session Description
Protocol (SDP), SIP determines the ―lowest level‖ of common services between the
endpoints. Conferences are established using only the 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 did not answer in the allotted number of rings. It
then returns a message indicating why the target endpoint was unavailable.
Establish a session between the origin and target endpoint -- The call can be
completed, SIP establishes a session between the endpoints. SIP also supports
mid-call changes, such as the addition of another endpoint to the conference or the
changing 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 is a peer-to-peer protocol. The peers in a session are called User Agents (UAs). A
user agent can function as one of the 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 this 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. Using this

Product Overview
3
method may be the preferred measure when not using an application layer firewall,
application layer firewalls like to know what applications are flowing though which
ports and it is possible using content types of other applications other than the one you
are trying to let through which has been denied.
User agent server (UAS)
UAS is the server that hosts the application responsible for receiving the SIP requests
from a UAC, and on reception 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.
This section introduces the SIP-T3xG IP phone family. The SIP-T3xG 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. The SIP-T3xG 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.
The SIP-T3xG 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 history
and directory access. The SIP-T3xG IP phones also support advanced functionalities,
including LDAP, Busy Lamp Field, Shared Call Appearance and Network Conference.
The following IP phone models are described:
SIP-T38G
SIP-T32G
The SIP-T3xG IP phones comply with the SIP standard (RFC 3261), and they can only be
used within a network that supports this type of phone.
For successfully operating as SIP endpoints in your network, the SIP-T3xG IP phones must
meet the following requirements:
A working IP network is established.
Routers are configured for VoIP.
VoIP gateways are configured for SIP.
The latest (or compatible) firmware of the SIP-T3xG IP phones is available.

Administrator’s Guide for SIP-T3xG IP Phones
4
A call server is active and configured to receive and send SIP messages.
This section lists the available physical features of the SIP-T3xG IP phones.
SIP-T38G
Physical Features:
-TI Aries chipset and TI voice engine
-4.3‖ TFT-LCD, 480 x 272 pixel, 16.7M colors
-6 VoIP accounts, BroadSoft/Avaya/Asterisk validated
-HD Voice: HD Codec, HD Handset, HD Speaker
-48 keys including 16 programmable keys
-1xRJ9 (4P4C) handset port
-1xRJ9 (4P4C) headset port
-2xRJ45 10/100/1000Mbps Ethernet ports
-1XRJ12 (6P6C) expansion module port
-19 LEDs: 1xpower, 6xline, 1xmessage, 1xheadset, 10xmemory
-Power adapter: AC 100~240V input and DC 5V/2A output
-Power over Ethernet (IEEE 802.3af)

Product Overview
5
SIP-T32G
Physical Features:
-TI Aries chipset and TI voice engine
-3‖ TFT-LCD, 400 x 240 pixel, 262K colors
-3 VoIP accounts, BroadSoft/Avaya/Asterisk validated
-HD Voice: HD Codec, HD Handset, HD Speaker
-32 keys including 3 programmable keys
-1xRJ9 (4P4C) handset port
-1xRJ9 (4P4C) headset port
-2xRJ45 10/100/1000Mbps Ethernet ports
-5 LEDs: 1xpower, 3xline, 1xmessage
-Power adapter: AC 100~240V input and DC 5V/2A output
-Power over Ethernet (IEEE 802.3af)
In addition to the physical features introduced above, the SIP-T3xG IP phones also
support the following key features when running the latest firmware:
Phone Features
-Call Options: emergency call, call waiting, call hold, call mute, call forward,
call transfer, call pickup, 3-way conference.
-Basic Features: DND, phone lock, auto redial, live dialpad, dial plan, hotline,
caller identity, auto answer.

Administrator’s Guide for SIP-T3xG IP Phones
6
-Advanced Features: BLF/BLF list, shared call appearance, distinctive ring
tones, remote phonebook, LDAP, 802.1x authentication.
Codecs and Voice Features
-Wideband codec: G.722
-Narrowband codec: G.711, G.723.1, G.726, G.729AB
-VAD, CNG, AEC, PLC, AJB, AGC
-Full-duplex speakerphone with AEC
Network Features
-SIP v1 (RFC2543), v2 (RFC3261)
-NAT Traversal: STUN mode
-DTMF: INBAND, RFC2833, SIP INFO
-Proxy mode and peer-to-peer SIP link mode
-IP assignment: Static/DHCP/PPPoE
-Bridge/Router mode for PC port
-TFTP/DHCP/PPPoE client
-HTTP/HTTPS server
-DNS client
-NAT/DHCP server
Management
-FTP/TFTP/HTTP/PnP auto-provision
-Configuration: browser/phone/auto-provision
-Direct IP call without SIP proxy
-Dial number via SIP server
-Dial URL via SIP server
Security
-HTTPS (server/client)
-SRTP (RFC3711)
-Transport Layer Security (TLS)
-VLAN (802.1q), QoS
-Digest authentication using MD5/MD5-sess
-Secure configuration file via AES encryption
-Phone lock for personal privacy protection
-Admin/User configuration mode

Getting Started
7
This chapter introduces the initialization of the SIP-T3xG IP phones, the installing and
connecting process of the IP phones which you need to follow.
This chapter provides the following major sections:
Connecting the IP Phones
Initialization Process Overview
Verifying Startup
Configuration Interfaces
Reading Icons
Configuring Basic Network Parameters
Creating Dial Plan
This section introduces how to install SIP-T3xG IP phones with the components in the
packing list.
1. Attach the stand
2. Connect the handset and optional headset
3. Connect the network and power
Note
A headset is not provided in the packing list.