Yealink SIP-T2 Series Service manual

Copyright © 2016 YEALINK(XIAMEN) NETWORK TECHNOLOGY CO., LTD.
Copyright © 2016 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.
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.
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.
Hereby, Yealink(Xiamen) Network Technology CO., LTD. declares that this phone is in
conformity with the essential requirements and other relevant provisions of the CE, FCC.
Statements of compliance can be obtained by contacting [email protected].
For SIP-T48G/T46G/T42G/T41P/T40P/T29G/T27P/T23P/T23G/T21(P) E2/T19(P) E2/CP860 IP phones:
This device is marked with the CE mark in compliance with EC Directives 2014/35/EU, 2014/30/EU.
For SIP VP-T49G IP phones:
This device is marked with the CE mark in compliance with R&TTE Directive 1999/5/EC.

Any Changes or modifications not expressly approved by the party responsible for compliance could void
the user's authority to operate the equipment.
This device complies 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 interference 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.
We are striving to improve our documentation quality and we appreciate your feedback. Email
your opinions and comments to [email protected].

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.

About This Guide
v
This guide is intended for administrators who need to properly configure, customize,
manage, and troubleshoot the IP phone system rather than end-users. It provides
details on the functionality and configuration of IP phones.
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.
This guide covers SIP VP-T49G, SIP-T48G, SIP-T46G, SIP-T42G, SIP-T41P, SIP-T40P, SIP-T29G,
SIP-T27P, SIP-T23P/G, SIP-T21(P) E2, SIP-T19(P) E2 and CP860 IP phones. The following
related documents are available:
Quick Start Guides, which describe how to assemble IP phones and configure the
most basic features available on IP phones.
User Guides, which describe the basic and advanced features available on IP
phones.
Auto Provisioning Guide, which describes how to provision IP phones using the
configuration files.
Description of Configuration Parameters in CFG Files, which describes all
configuration parameters in configuration files.
<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.
For support or service, please contact your Yealink reseller or go to Yealink Technical
Support online: http://support.yealink.com/.
Yealink documentations contain a few typographic 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

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
vi
Convention
Description
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 765), 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_CP860_W56P_IP_Phones_Auto_Provisioning_Guide ).
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-T23G IP phone: [phone].rom). This administrator
guide includes the following chapters:
Chapter 1, ―Product Overview‖ describes the SIP components and SIP IP phones.
Chapter 2, ―Getting Started‖ describes how to install and connect IP phones,
configuration methods and resource files.
Chapter 3, ―Configuring Basic Features‖ describes how to configure the basic
features on IP phones.
Chapter 4, ―Configuring Advanced Features‖ describes how to configure the
advanced features on IP phones.
Chapter 5, ―Configuring Audio Features‖ describes how to configure the audio
features on IP phones.
Chapter 6, ―Configuring Video Features‖ describes how to configure the video
features on IP phones.
Chapter 7, ―Configuring Security Features‖ describes how to configure the security
features on IP phones.
Chapter 8, ―Troubleshooting‖ describes how to troubleshoot IP phones and
provides some common troubleshooting solutions.

About This Guide
vii
Chapter 9, ―Appendix‖ provides the glossary, reference information about IP
phones compliant with RFC 3261, SIP call flows and the sample configuration files.
This section describes the changes to this guide for each release and guide version.
The following sections are new for this version:
Site Name on page 136
Idle Clock on page 137
SIP IP Call on page 166
Cloud on page 168
Major updates have occurred to the following sections:
Reading Icons on page 38
IP Direct Auto Answer on page 311
Allow IP Call on page 314
DTMF on page 455
NAT Traversal on page 732
Rport on page 743
Audio Codecs on page 794
Video Codecs on page 828
Secure Real-Time Transport Protocol on page 861
Appendix F: Configurations Defined Never be Saved to <MAC>-local.cfg file on
page 959
The following section is new for this version:
Power Saving on page 124
Major updates have occurred to the following sections:
Reading Icons on page 38
Screen Saver on page 117
NTP Time Serveron page 179

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
viii
Key As Send on page 236
Call Park on page 436
DTMF on page 455
Ring Tones on page 765
Power and Startup Issues on page 931
Appendix C: Trusted Certificates on page 938
Major updates have occurred to the following sections:
Transport Layer Security on page 850
Appendix C: Trusted Certificates on page 938
The following section is new for this version:
Onscreen Keyboard Input Method Customization on page 211
Major updates have occurred to the following sections:
Reading Icons on page 38
Obtaining Configuration Files and Resource Files on page 52
Configuring Transmission Methods of the Internet Port and PC Port on page 87
Wi-Fi on page 141
Customizing Softkey Layout Template File on page 226
Customizing a Local Contact File (Color Screen Phones) on page 278
Recent Call In Dialing on page 426
Bandwidth on page 500
External Monitor on page 506
Shared Call Appearance (SCA) on page 564
VQ-RTCPXR on page 703
Sending Volume on page 791
Audio Codecs on page 794
Video Codecs on page 828
Appendix F: Configurations Defined Never be Saved to <MAC>-local.cfg file on
page 959

About This Guide
ix
The following section is new for this version:
Exporting All the Diagnostic Files on page 913
Major updates have occurred to the following sections:
Expansion Module on page 17
Connecting the Handset and Optional Headset (not Applicable to CP860 IP Phones)
on page 28
Connecting the Power and Network on page 30
Configuring Transmission Methods of the Internet Port and PC Port on page 87
Backlight on page 131
Incoming Intercom Calls on page 477
Busy Lamp Field (BLF) on page 532
Voice Quality Monitoring on page 700
Sending Volume on page 791
Capturing Packets on page 900
Major updates have occurred to the following sections:
Verifying Startup on page 37
Reading Icons on page 38
Incoming Intercom Calls on page 477
Documentations of the newly released SIP VP-T49G IP phones have also been added.
The following sections are new for this version:
Answer By Hand on page 499
Bandwidth on page 500
Screenshot and Recording on page 503
Reserved Ports on page 727
Configuring Video Features on page 819
Getting Information from Talk Statistics on page 908

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
x
Major updates have occurred to the following sections:
Connecting the IP Phones on page 19
Wi-Fi on page 141
Customizing Softkey Layout Template File on page 226
Customizing a Directory Template File on page 263
Voice Quality Monitoring on page 700
Quality of Service on page 721
TR-069 Device Management on page 748
Audio Codecs on page 794
Capturing Packets on page 900
Troubleshooting Solutions on page 914
Appendix B: Time Zones on page 937
Appendix F: Configurations Defined Never be Saved to <MAC>-local.cfg file on
page 959
This version is updated to incorporate CP860 IP phones. Documentations of the newly
released SIP-T40P IP phones have also been added. The following sections are new for
this version:
Conventions Used in Yealink Documentations on page v
Wi-Fi on page 141
Major updates have occurred to the following sections:
Expansion Module on page 17
Bluetooth on page 138
Auto Answer on page 304
Session Timer on page 356
Dialog Info Call Pickup on page 423
Methods of Transmitting DTMF Digit on page 456
Busy Lamp Field (BLF) on page 532
Multicast Paging on page 587
Action URI on page 645
VPN on page 695
Quality of Service on page 721
NAT Traversal on page 732

About This Guide
xi
IPv6 Support on page 754
Distinctive Ring Tones on page 771
Viewing Log Files on page 883
Troubleshooting Solutions on page 914
Appendix F: Configurations Defined Never be Saved to <MAC>-local.cfg file on
page 959
Documentations of the newly released SIP-T19(P) E2 IP phones have also been added.
The following sections are new for this version:
Ringing Timeout on page 481
Shared Call Appearance (SCA) on page 564
Bridge Lines Appearance (BLA) on page 577
Short Message Service (SMS) on page 586
Appendix F: Configurations Defined Never be Saved to <MAC>-local.cfg file on
page 959
Major updates have occurred to the following sections:
Documentations on page v
Expansion Module on page 15
Reading Icons on page 38
Configuration Files on page 48
Obtaining Configuration Files and Resource Files on page 52
Account on page 153
Auto Answer on page 304
Do Not Disturb (DND) on page 330
Return Code When Refuse on page 348
Call Forward on page 366
LDAP on page 517
Action URL on page 626
Action URI on page 645
Server Redundancy on page 655

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
xii
The following sections are new for this version:
Expansion Module on page 15
Obtaining Configuration Files and Resource Files on page 52
DHCP Option on page 73
Bluetooth on page 138
Enable Page Tips on page 149
Label Length on page 151
Account on page 153
Display Method on Dialing on page 173
Redial Tone on page 298
Ringer Device for Headset on page 300
IP Direct Auto Answer on page 311
Allow IP Call on page 314
Accept SIP Trust Server Only on page 316
Transfer Mode via Dsskey on page 397
Allow Trans Exist Call on page 398
Call Number Filter on page 434
Call Timeout on page 481
Send user=phone on page 481
SIP Send MAC on page 484
SIP Send Line on page 486
Reserve # in User Name on page 489
Password Dial on page 491
Unregister When Reboot on page 493
100 Reliable Retransmission on page 495
Reboot in Talking on page 497
Logon Wizard on page 622
Auto-Logout Time on page 837
Appendix E: Auto Provisioning Flowchart (Keep user personalized configuration
settings) on page 958
Major updates have occurred to the following sections:
DHCP on page 68

About This Guide
xiii
Time and Date on page 178
Language on page 196
Input Method on page 207
Logo Customization on page 220
Softkey Layout on page 224
Dial Plan on page 241
Directory on page 263
Search Source in Dialing on page 266
Local Directory on page 275
SIP Session Timer on page 353
Call Hold on page 359
DTMF on page 455
Remote Phone Book on page 510
VLAN on page 681
Network Address Translation on page 730
Comfort Noise Generation on page 812
Phone Lock on page 838
Troubleshooting Methods on page 883
Troubleshooting Solutions on page 914
This version is updated to incorporate SIP-T48G IP phones. Documentations of the newly
released SIP-T27P and SIP-T21(P) E2 IP phones have also been added.
Major updates have occurred to the following sections:
Reading Icons on page 37
Configuration Files on page 48
Backlight on page 131
Time and Date on page 177
Auto Answer on page 304
Return Code When Refuse on page 348
DTMF on page 455
Phone Lock on page 838
Appendix B: Time Zones on page 937

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
xiv
This version is updated to incorporate SIP-T46G, SIP-T42G, SIP-T41P and SIP-T29G IP
phones. The following sections are new for this version:
Wallpaper on page 112
Hide Features Access Code on page 555
Major updates have occurred to the following sections:
DHCP on page 68
Call Display on page 169
Input Method on page 207
BLF List on page 545
IPv6 Support on page 754
Viewing Log Files on page 883

Table of Contents
xv
About This Guide ...................................................................... v
Documentations...............................................................................................................................v
Conventions Used in Yealink Documentations .............................................................................v
In This Guide ...................................................................................................................................vi
Summary of Changes ................................................................................................................... vii
Changes for Release 80, Guide Version 80.131................................................................... vii
Changes for Release 80, Guide Version 80.130................................................................... vii
Changes for Release 80, Guide Version 80.95.................................................................... viii
Changes for Release 80, Guide Version 80.91.................................................................... viii
Changes for Release 80, Guide Version 80.90...................................................................... ix
Changes for Release 80, Guide Version 80.82...................................................................... ix
Changes for Release 80, Guide Version 80.81...................................................................... ix
Changes for Release 80, Guide Version 80.80.......................................................................x
Changes for Release 80, Guide Version 80.60...................................................................... xi
Changes for Release 80, Guide Version 80.21..................................................................... xii
Changes for Release 80, Guide Version 80.20.................................................................... xiii
Changes for Release 80, Guide Version 80.6...................................................................... xiv
Table of Contents ................................................................... xv
Product Overview..................................................................... 1
VoIP Principle....................................................................................................................................1
SIP Components...............................................................................................................................2
SIP IP Phone Models........................................................................................................................3
Physical Features of IP Phones ................................................................................................4
Key Features of IP Phones......................................................................................................15
Expansion Module......................................................................................................................... 17
Getting Started....................................................................... 19
Connecting the IP Phones .............................................................................................................19
Attaching the Stand and the Optional Wall Mount Bracket (not Applicable to CP860 IP
Phones)....................................................................................................................................20
Inserting the Camera (Only Applicable to SIP VP-T49G IP Phones)...................................27
Connecting the Handset and Optional Headset (not Applicable to CP860 IP Phones) .28
Connecting the Power and Network ....................................................................................30
Connecting the Optional Extension Microphones (Only Applicable to CP860 IP Phones)

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
xvi
..................................................................................................................................................32
Connecting the Optional USB Flash Drive (Only Applicable to SIP VP-T49G and CP860 IP
Phones)....................................................................................................................................33
Connecting the Optional PC or Mobile Device (Only Applicable to CP860 IP Phones)..34
Connecting the Optional External Monitor (Only Applicable to SIP VP-T49G IP Phones)35
Initialization Process Overview ....................................................................................................36
Verifying Startup ............................................................................................................................37
Reading Icons ................................................................................................................................38
Configuration Methods.................................................................................................................48
Phone User Interface..............................................................................................................48
Web User Interface ................................................................................................................48
Configuration Files..................................................................................................................48
Obtaining Configuration Files and Resource Files .....................................................................52
Keep User Personalized Settings .................................................................................................55
Configuration Parameters......................................................................................................55
Scenario A Keep user personalized configuration settings ...............................................57
Scenario B Clear user personalized configuration settings ...............................................61
Scenario C Keep user personalized settings after factory reset .......................................62
Scenario D Import or export the local configuration file .................................................... 64
Provisioning Server........................................................................................................................66
Supported Provisioning Protocols .........................................................................................66
Setting up the Provisioning Server........................................................................................66
Deploying Phones from the Provisioning Server ................................................................. 67
Configuring Basic Network Parameters ......................................................................................68
DHCP .......................................................................................................................................68
DHCP Option...........................................................................................................................73
Configuring Network Parameters Manually ........................................................................79
PPPoE .......................................................................................................................................84
Configuring Transmission Methods of the Internet Port and PC Port .................................87
Configuring PC Port Mode .....................................................................................................91
Upgrading Firmware.....................................................................................................................93
Upgrading Firmware via Web User Interface .....................................................................94
Upgrading Firmware from the Provisioning Server ............................................................94
Configuring Basic Features ...................................................101
Power Indicator LED ....................................................................................................................103
Notification Popups......................................................................................................................108
Contrast ........................................................................................................................................111
Wallpaper.....................................................................................................................................113
Screen Saver................................................................................................................................117
Power Saving ...............................................................................................................................124
Backlight.......................................................................................................................................131
Site Name.....................................................................................................................................136
Idle Clock......................................................................................................................................137

Table of Contents
xvii
Bluetooth ......................................................................................................................................138
Wi-Fi ..............................................................................................................................................141
Enable Page Tips ......................................................................................................................... 150
Label Length.................................................................................................................................151
Account Settings ..........................................................................................................................153
SIP Account ...........................................................................................................................153
SIP IP Call...............................................................................................................................166
Cloud ............................................................................................................................................168
Call Display .................................................................................................................................. 169
Display Method on Dialing.........................................................................................................173
Web Server Type..........................................................................................................................175
Time and Date .............................................................................................................................178
NTP Time Server ...................................................................................................................179
Time and Date Settings .......................................................................................................185
Daylight Saving Time ...........................................................................................................189
Language .....................................................................................................................................196
Loading Language Packs ....................................................................................................197
Specifying the Language to Use.........................................................................................204
Input Method ...............................................................................................................................207
Keypad Input Method Customization ................................................................................207
Onscreen Keyboard Input Method Customization ...........................................................211
Specifying the Default Input Method .................................................................................219
Logo Customization .....................................................................................................................220
Customizing a Logo Template File ......................................................................................221
Configuring the Logo Shown on the Idle Screen...............................................................222
Softkey Layout..............................................................................................................................224
Customizing Softkey Layout Template File.........................................................................226
Key As Send ................................................................................................................................. 236
Dial Plan........................................................................................................................................241
Replace Rule .........................................................................................................................242
Dial-now ................................................................................................................................247
Area Code.............................................................................................................................253
Block Out...............................................................................................................................256
Hotline ..........................................................................................................................................258
Off Hook Hot Line Dialing...........................................................................................................261
Directory .......................................................................................................................................263
Customizing a Directory Template File............................................................................... 263
Search Source in Dialing.............................................................................................................266
Customizing a Super Search Template File .......................................................................266
Save Call Log............................................................................................................................... 269
Call List Show Number ................................................................................................................271
Missed Call Log ...........................................................................................................................273
Local Directory.............................................................................................................................275
Customizing a Local Contact File........................................................................................275

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xviii
Live Dialpad.................................................................................................................................292
Call Waiting..................................................................................................................................294
Redial Tone...................................................................................................................................298
Ringer Device for Headset .........................................................................................................300
Auto Redial...................................................................................................................................302
Auto Answer.................................................................................................................................304
IP Direct Auto Answer..................................................................................................................311
Allow IP Call .................................................................................................................................314
Accept SIP Trust Server Only ......................................................................................................316
Call Completion...........................................................................................................................318
Anonymous Call...........................................................................................................................321
Anonymous Call Rejection ..........................................................................................................326
Do Not Disturb (DND)..................................................................................................................330
Busy Tone Delay...........................................................................................................................346
Return Code When Refuse ..........................................................................................................348
Early Media..................................................................................................................................349
180 Ring Workaround ..................................................................................................................350
Use Outbound Proxy in Dialog...................................................................................................351
SIP Session Timer .........................................................................................................................353
Session Timer ...............................................................................................................................356
Call Hold.......................................................................................................................................359
Music on Hold.......................................................................................................................363
Call Forward ................................................................................................................................366
Call Transfer .................................................................................................................................388
Network Conference ...................................................................................................................391
Feature Key Synchronization......................................................................................................393
Transfer on Conference Hang Up ..............................................................................................395
Transfer Mode via Dsskey...........................................................................................................397
Allow Trans Exist Call...................................................................................................................398
Directed Call Pickup....................................................................................................................400
Group Call Pickup........................................................................................................................412
Dialog Info Call Pickup................................................................................................................423
Recent Call In Dialing..................................................................................................................426
ReCall............................................................................................................................................428
Call Number Filter........................................................................................................................434
Call Park .......................................................................................................................................436
Calling Line Identification Presentation.....................................................................................448
Connected Line Identification Presentation ..............................................................................453
DTMF.............................................................................................................................................455
Methods of Transmitting DTMF Digit ..................................................................................456
Suppress DTMF Display.......................................................................................................464
Transfer via DTMF.................................................................................................................466
Play Local DTMF Tone ..........................................................................................................468
Allow Mute ...................................................................................................................................470

Table of Contents
xix
Intercom........................................................................................................................................471
Outgoing Intercom Calls......................................................................................................472
Incoming Intercom Calls ......................................................................................................477
Call Timeout ................................................................................................................................. 481
Ringing Timeout ...........................................................................................................................481
Send user=phone .......................................................................................................................482
SIP Send MAC..............................................................................................................................484
SIP Send Line................................................................................................................................486
Reserve # in User Name.............................................................................................................489
Password Dial...............................................................................................................................491
Unregister When Reboot.............................................................................................................493
100 Reliable Retransmission .......................................................................................................495
Reboot in Talking.......................................................................................................................... 497
Answer By Hand..........................................................................................................................499
Bandwidth ....................................................................................................................................500
Screenshot and Recording .........................................................................................................503
Screenshot ............................................................................................................................503
Call and Conference Recording (for SIP VP-T49G IP Phones)...........................................504
Call and Conference Recording (for CP860 IP Phones) ....................................................506
External Monitor ..........................................................................................................................506
Configuring Advanced Features...........................................509
Remote Phone Book ....................................................................................................................510
Customizing Remote Phone Book Template File................................................................510
LDAP.............................................................................................................................................. 517
Busy Lamp Field (BLF) .................................................................................................................532
BLF List ..........................................................................................................................................547
Hide Features Access Code.......................................................................................................555
Automatic Call Distribution (ACD) .............................................................................................557
Shared Call Appearance (SCA) ................................................................................................564
Bridge Lines Appearance (BLA) ................................................................................................577
Message Waiting Indicator ........................................................................................................580
Short Message Service (SMS) ...................................................................................................586
Multicast Paging ..........................................................................................................................587
Sending RTP Stream.............................................................................................................587
Receiving RTP Stream ..........................................................................................................601
Call Recording .............................................................................................................................606
Hot Desking..................................................................................................................................614
Logon Wizard ...............................................................................................................................622
Action URL ....................................................................................................................................626
Action URI.....................................................................................................................................645
Configuring Trusted IP Address for Action URI...................................................................650
Scenario A - Capturing the Current Screen of the Phone.................................................653
Scenario B - Placing a Call via Web User Interface.......................................................... 654

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
xx
Server Redundancy.....................................................................................................................655
Server Domain Name Resolution........................................................................................ 669
Static DNS Cache ........................................................................................................................ 673
VLAN .............................................................................................................................................681
LLDP .......................................................................................................................................682
CDP ........................................................................................................................................685
Manual Configuration for VLAN in the Wired Network.....................................................688
DHCP VLAN ...........................................................................................................................692
Configuring VLAN Feature in the Wireless Network..........................................................695
VPN................................................................................................................................................697
Voice Quality Monitoring ............................................................................................................700
RTCP-XR..................................................................................................................................701
VQ-RTCPXR............................................................................................................................703
Quality of Service ........................................................................................................................ 721
Configuring the IP phone for Use with a Firewall or NAT......................................................... 727
Reserved Ports ......................................................................................................................727
Network Address Translation ..............................................................................................730
Real-Time Transport Protocol.......................................................................................................746
TR-069 Device Management ......................................................................................................748
IPv6 Support ................................................................................................................................. 754
Configuring Audio Features ..................................................765
Ring Tones ....................................................................................................................................765
Distinctive Ring Tones ..................................................................................................................771
Tones .............................................................................................................................................778
Voice Mail Tone............................................................................................................................786
Headset Prior ...............................................................................................................................787
Dual Headset...............................................................................................................................789
Sending Volume...........................................................................................................................791
Audio Codecs ..............................................................................................................................794
Acoustic Clarity Technology........................................................................................................809
Acoustic Echo Cancellation ................................................................................................. 809
Background Noise Suppression..........................................................................................810
Automatic Gain Control .......................................................................................................810
Voice Activity Detection .......................................................................................................811
Comfort Noise Generation ..................................................................................................812
Jitter Buffer ............................................................................................................................814
Configuring Video Features ..................................................819
Video Settings..............................................................................................................................819
Video Codecs...............................................................................................................................828
Configuring Security Features...............................................833