Yealink CP969 Service manual

ii
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].
Technical Support
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.

iv
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 smart media phones rather than end-users. This guide
will help you understand the VoIP network and 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 80 or higher. The
firmware format is like x.x.x.x.rom. The second x from left must be greater than or equal to 80
(e.g., the firmware version of SIP-T58V IP phone: 58.80.0.5.rom).
Chapters in This Guide
This administrator guide includes the following chapters:
Chapter 1, “Product Overview” describes the smart media 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 Video Features” describes how to configure the video features on

Administrator’s Guide for SIP-T5 Series Smart Media Phones
vi
IP phones.
Chapter 8, “Configuring Security Features” describes how to configure the security features
on IP phones.
Chapter 9, “Troubleshooting” describes how to troubleshoot IP phones and provides some
common troubleshooting solutions.
Chapter 10, “Appendix” provides the glossary, time zones, trusted certificates, auto
provisioning flowchart, reference information about IP phones compliant with RFC 3261,
SIP call flows, some other function lists (e.g., DSS keys, reading icons) and index.
Related Documentations
The following related documents for SIP-T58V/A, SIP-T56A and CP960 IP phones 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.
Auto Provisioning Guide, which describes how to provision IP phones using the
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 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 (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 601), 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-T2_Series_T19(P)
E2_T4_Series_T5_Series_W5_Series_CP_Series_IP_Phones_Auto_Provis
ioning_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 indicates that you need to select Basic
from the Settings menu via phone user interface.
Note: By default, the Settings menu locates on the second idle
screen. You need to swipe left/right to see it. Or, you can also
swipe down from the top of the screen to enter the control center
to see it.
Reading the Configuration Parameter Tables
The feature descriptions discussed in this guide include two tables. One is a summary table of

Administrator’s Guide for SIP-T5 Series Smart Media Phones
viii
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.
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 116. 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 (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
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 enable the audio codec 1 for account 1, you can
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 configurable via web/phone user interface.

Administrator’s Guide for SIP-T5 Series Smart Media Phones
x
locate the account.1.codec.1.enable in the MAC.cfg file and configure it as required (e.g.,
account.1.codec.1.enable = 1).
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.
As shown in the following illustration:

Introduction
xi
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 113.
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., Settings->Features->Auto Answer->Account X) 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.
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-T58V 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.

Administrator’s Guide for SIP-T5 Series Smart Media Phones
xii
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.
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,

Introduction
xiii
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 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.

Administrator’s Guide for SIP-T5 Series Smart Media Phones
xiv
Summary of Changes
This section describes the changes to this guide for each release and guide version.
Changes for Release 80, Guide Version 80.12
Documentations of the newly released CP960 IP phones have been added.
The following sections are new for this version:
CSTA Control on page 450
Real-Time Transport Protocol (RTP) Ports on page 592
Transient Noise Suppressor (TNS) on page 651
Noise Barrier Suppressor (NBS) on page 652
Major updates have occurred to the following sections:
Physical Features of IP Phones on page 2
Key Features of IP Phones on page 4
Connecting the IP Phones on page 10
Power Saving on page 157
Bluetooth on page 164
Intercom on page 412
Customizing a Local Contact File on page 270
Auto Answer on page 292
Appendix C: Trusted Certificates on page 770
Changes for Release 80, Guide Version 80.11
Major update had occurred to the following section:
Door Phone on page 441

Table of Contents
xv
Table of Contents
Introduction..........................................................................v
About This Guide ...................................................................................................................................................v
Chapters in This Guide.........................................................................................................................................v
Related Documentations ...................................................................................................................................vi
Conventions Used in Yealink Documentations .......................................................................................vii
Reading the Configuration Parameter Tables..........................................................................................vii
Summary Table Format.......................................................................................................................... viii
Configuration Parameter Table Format..............................................................................................ix
Recommended References ...............................................................................................................................xi
Understanding VoIP Principle and SIP Components .............................................................................xi
VoIP Principle ...............................................................................................................................................xii
SIP Components........................................................................................................................................ xiii
Summary of Changes ....................................................................................................................................... xiv
Changes for Release 80, Guide Version 80.12.............................................................................. xiv
Changes for Release 80, Guide Version 80.11.............................................................................. xiv
Table of Contents...............................................................xv
Product Overview ................................................................1
SIP IP Phone Models.............................................................................................................................................1
Physical Features of IP Phones................................................................................................................2
Key Features of IP Phones.........................................................................................................................4
Expansion Modules ...............................................................................................................................................6
Getting Started.....................................................................9
What IP Phones Need to Meet.........................................................................................................................9
Yealink IP Phones in a Network .......................................................................................................................9
Connecting the IP Phones...............................................................................................................................10
Inserting the Camera (only applicable to SIP-T58V/A IP phones) ........................................11
Attaching the Stand and the Optional Wall Mount Bracket (not applicable to CP960 IP phones)
...........................................................................................................................................................................12
Adjust the angle of touch screen (only applicable to SIP-T58V/A IP phones).................14
Connecting the Handset and Optional Headset (not applicable to CP960 IP phones)14
Connecting the Power and Network.................................................................................................15
Connecting the Optional USB Flash Drive.......................................................................................18
Connecting the Wired Expansion MIC CPE90 (Only Applicable to CP960 IP Phones) .19

Administrator’s Guide for SIP-T5 Series Smart Media Phones
xvi
Connecting the Optional PC using a Micro USB Cable (Only Applicable to CP960 IP Phones) 19
Connecting the Optional External Speaker (Only Applicable to CP960 IP Phones) ......20
Initialization Process Overview......................................................................................................................20
Verifying Startup .................................................................................................................................................21
Setting Up Your System ....................................................23
Setting Up Your Phone Network ..................................................................................................................23
DHCP...............................................................................................................................................................24
DHCP Option...............................................................................................................................................28
Configuring Network Parameters Manually...................................................................................32
PPPoE..............................................................................................................................................................38
Configuring Transmission Methods of the Internet Port and PC Port................................40
Configuring PC Port Mode ....................................................................................................................44
Web Server Type........................................................................................................................................46
Wi-Fi................................................................................................................................................................50
VLAN ...............................................................................................................................................................53
IPv6 Support ................................................................................................................................................66
VPN..................................................................................................................................................................76
Configuring the IP Phone for Use with a Firewall or NAT ........................................................80
Quality of Service (QoS)..........................................................................................................................95
802.1X Authentication .............................................................................................................................99
Setting Up Your Phones with a Provisioning Server ......................................................................... 110
Provisioning Points to Consider ....................................................................................................... 110
Provisioning Methods........................................................................................................................... 111
Boot Files, Configuration Files and Resource Files ................................................................... 114
Setting Up a Provisioning Server ..................................................................................................... 121
Upgrading Firmware.............................................................................................................................. 124
Keeping User Personalized Settings after Auto Provisioning .............................................. 132
Configuring Basic Features ............................................ 143
Power Indicator LED........................................................................................................................................ 145
Notification Popups ........................................................................................................................................ 149
Wallpaper ............................................................................................................................................................ 152
Screen Saver....................................................................................................................................................... 156
Power Saving ..................................................................................................................................................... 157
Backlight .............................................................................................................................................................. 162
Bluetooth............................................................................................................................................................. 164
Enable Page Tips .............................................................................................................................................. 169
Page Tips for Expansion Module............................................................................................................... 171
Account Registration ...................................................................................................................................... 172
Multiple Line Keys per Account ................................................................................................................. 180
Call Display ......................................................................................................................................................... 184
Display Method on Dialing .......................................................................................................................... 186

Table of Contents
xvii
Time and Date................................................................................................................................................... 188
NTP Time Server...................................................................................................................................... 189
Time and Date Settings........................................................................................................................ 194
Daylight Saving Time (DST)................................................................................................................ 197
Language............................................................................................................................................................. 205
Loading Language Packs..................................................................................................................... 206
Specifying the Language to Use....................................................................................................... 213
Softkey Layout................................................................................................................................................... 215
Customizing Softkey Layout Template File.................................................................................. 217
Key As Send........................................................................................................................................................ 223
Dial Plan ............................................................................................................................................................... 227
Dial Plan using XML Template Files................................................................................................ 227
Dial Plan using Digit Map String Rules.......................................................................................... 242
Emergency Dialplan ........................................................................................................................................ 251
Hotline .................................................................................................................................................................. 255
Off Hook Hot Line Dialing............................................................................................................................ 258
Search Source List In Dialing....................................................................................................................... 260
Customizing a Super Search Template File ................................................................................. 260
Save Call Log...................................................................................................................................................... 263
Call List Show Number................................................................................................................................... 265
Missed Call Log................................................................................................................................................. 266
Local Directory .................................................................................................................................................. 268
Customizing a Local Contact File..................................................................................................... 268
Configuring Local Directory ............................................................................................................... 275
Live Dialpad........................................................................................................................................................ 280
Speed Dial........................................................................................................................................................... 282
Call Waiting ........................................................................................................................................................ 287
Auto Redial ......................................................................................................................................................... 290
Auto Answer....................................................................................................................................................... 292
IP Direct Auto Answer .................................................................................................................................... 297
Allow IP Call........................................................................................................................................................ 299
Accept SIP Trust Server Only....................................................................................................................... 300
Call Completion ................................................................................................................................................ 302
Anonymous Call................................................................................................................................................ 305
Anonymous Call Rejection ........................................................................................................................... 309
Do Not Disturb (DND).................................................................................................................................... 313
Busy Tone Delay ............................................................................................................................................... 325
Return Code When Refuse........................................................................................................................... 327
Early Media ......................................................................................................................................................... 329
180 Ring Workaround.................................................................................................................................... 329
Use Outbound Proxy in Dialog .................................................................................................................. 330
SIP Session Timer ............................................................................................................................................. 332
Session Timer..................................................................................................................................................... 334
Call Hold .............................................................................................................................................................. 337

Administrator’s Guide for SIP-T5 Series Smart Media Phones
xviii
Music on Hold (MoH) ........................................................................................................................... 341
Call Forward........................................................................................................................................................ 343
Call Transfer........................................................................................................................................................ 363
Local Conference.............................................................................................................................................. 366
Network Conference....................................................................................................................................... 367
Transfer on Conference Hang Up ............................................................................................................. 369
Feature Key Synchronization....................................................................................................................... 371
Transfer Mode via Dsskey............................................................................................................................. 372
Directed Call Pickup........................................................................................................................................ 374
Group Call Pickup ............................................................................................................................................ 382
Dialog Info Call Pickup................................................................................................................................... 389
Recent Call In Dialing ..................................................................................................................................... 392
ReCall .................................................................................................................................................................... 394
Call Number Filter............................................................................................................................................ 397
Call Park ............................................................................................................................................................... 399
Calling Line Identification Presentation (CLIP)..................................................................................... 403
Connected Line Identification Presentation (COLP) .......................................................................... 407
Mute ...................................................................................................................................................................... 410
Allow Mute ................................................................................................................................................ 410
Keep Mute ................................................................................................................................................. 411
Intercom............................................................................................................................................................... 412
Outgoing Intercom Calls ..................................................................................................................... 413
Incoming Intercom Calls...................................................................................................................... 419
Call Timeout ....................................................................................................................................................... 422
Ringing Timeout............................................................................................................................................... 422
Send user=phone ............................................................................................................................................ 423
SIP Send MAC.................................................................................................................................................... 425
SIP Send Line...................................................................................................................................................... 427
Reserve # in User Name................................................................................................................................ 429
Password Dial..................................................................................................................................................... 431
Unregister When Reboot.............................................................................................................................. 433
100 Reliable Retransmission........................................................................................................................ 434
Reboot in Talking............................................................................................................................................. 436
Answer By Hand ............................................................................................................................................... 438
Call Recording Using Soft Key.................................................................................................................... 439
Silent Mode ........................................................................................................................................................ 440
Door Phone ........................................................................................................................................................ 441
Mobile Account................................................................................................................................................. 445
Quick Login......................................................................................................................................................... 449
CSTA Control...................................................................................................................................................... 450
Configuring Advanced Features .................................... 453
Remote Phone Book....................................................................................................................................... 453
Customizing Remote Phone Book Template File...................................................................... 453

Table of Contents
xix
Lightweight Directory Access Protocol (LDAP).................................................................................... 461
Busy Lamp Field (BLF)..................................................................................................................................... 473
BLF Subscription...................................................................................................................................... 473
Visual Alert and Audio Alert for BLF Pickup ................................................................................ 477
BLF LED Mode.......................................................................................................................................... 479
Configuring a BLF Key........................................................................................................................... 482
Busy Lamp Field (BLF) List ............................................................................................................................ 486
Hide Feature Access Codes.......................................................................................................................... 492
Shared Call Appearance (SCA).................................................................................................................... 494
Message Waiting Indicator (MWI) ............................................................................................................ 503
Multicast Paging............................................................................................................................................... 508
Sending RTP Stream.............................................................................................................................. 508
Receiving RTP Stream........................................................................................................................... 519
Call Recording Using DSS Keys (Record and URL Record)............................................................. 524
Hot Desking........................................................................................................................................................ 531
Logon Wizard .................................................................................................................................................... 536
Action URL .......................................................................................................................................................... 540
Action URI ........................................................................................................................................................... 560
Configuring Trusted IP Address for Action URI ......................................................................... 564
Scenario A - Capturing the Current Screen of the Phone ..................................................... 566
Scenario B - Placing a Call via Web User Interface................................................................... 568
Server Redundancy.......................................................................................................................................... 569
Server Domain Name Resolution..................................................................................................... 581
Static DNS Cache.............................................................................................................................................. 584
Real-Time Transport Protocol (RTP) Ports............................................................................................. 592
TR-069 Device Management....................................................................................................................... 594
Configuring Audio Features........................................... 601
Redial Tone......................................................................................................................................................... 601
Ring Tones .......................................................................................................................................................... 602
Distinctive Ring Tones.................................................................................................................................... 607
Tones..................................................................................................................................................................... 614
Voice Mail Tone................................................................................................................................................ 621
Ringer Device for Headset ........................................................................................................................... 622
Headset Prior ..................................................................................................................................................... 624
Dual Headset...................................................................................................................................................... 626
Sending Volume ............................................................................................................................................... 627
Audio Codecs..................................................................................................................................................... 629
Supported Audio Codecs .................................................................................................................... 630
Packetization Time (PTime) ................................................................................................................ 638
Opus Sample Rate.................................................................................................................................. 640
Acoustic Clarity Technology ........................................................................................................................ 642
Acoustic Echo Cancellation (AEC) .................................................................................................... 642
Background Noise Suppression (BNS)........................................................................................... 643

Administrator’s Guide for SIP-T5 Series Smart Media Phones
xx
Automatic Gain Control (AGC).......................................................................................................... 644
Voice Activity Detection (VAD) ......................................................................................................... 644
Comfort Noise Generation (CNG).................................................................................................... 645
Jitter Buffer ................................................................................................................................................ 647
Transient Noise Suppressor (TNS)................................................................................................... 651
Noise Barrier Suppressor (NBS)........................................................................................................ 652
DTMF..................................................................................................................................................................... 654
Methods of Transmitting DTMF Digit............................................................................................ 654
Suppress DTMF Display ....................................................................................................................... 659
Transfer via DTMF................................................................................................................................... 661
Play Local DTMF Tone .......................................................................................................................... 663
Voice Quality Monitoring (VQM)............................................................................................................... 664
RTCP-XR...................................................................................................................................................... 665
VQ-RTCPXR ............................................................................................................................................... 666
Configuring Video Features ........................................... 683
Video Settings ................................................................................................................................................... 683
Video Codecs..................................................................................................................................................... 685
Configuring Security Features ....................................... 689
User and Administrator Passwords........................................................................................................... 689
Auto-Logout Time ........................................................................................................................................... 691
Phone Lock ......................................................................................................................................................... 692
Transport Layer Security (TLS) .................................................................................................................... 698
Secure Real-Time Transport Protocol (SRTP) ....................................................................................... 709
Encrypting and Decrypting Files................................................................................................................ 713
Configuration Parameters................................................................................................................... 713
Encrypting and Decrypting Configuration Files......................................................................... 717
Troubleshooting.............................................................. 721
Troubleshooting Methods ........................................................................................................................... 721
Viewing Log Files .................................................................................................................................... 721
Capturing Packets................................................................................................................................... 735
Enabling Watch Dog Feature............................................................................................................. 740
Getting Information from Status Indicators ................................................................................ 741
Getting Information from Talk Statistics....................................................................................... 742
Analyzing Configuration Files............................................................................................................ 742
Troubleshooting Solutions........................................................................................................................... 746
IP Address Issues..................................................................................................................................... 746
Time and Date Issues............................................................................................................................ 747
Display Issues ........................................................................................................................................... 747
Phone Book Issues ................................................................................................................................. 748