Yealink SIP-T21 E2 User manual

Copyright © 2015 YEALINK NETWORK TECHNOLOGY CO., LTD
Copyright © 2015 Yealink Network Technology CO., LTD. All rights reserved. No parts of this
publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, photocopying, recording, or otherwise, for any purpose, without the express written
permission of Yealink Network Technology CO., LTD. Under the law, reproducing includes
translating into another language or format.
When this publication is made available on media, Yealink Network Technology CO., LTD. gives
its consent to downloading and printing copies of the content provided in this file only for private
use but not for redistribution. No parts of this publication may be subject to alteration,
modification or commercial use. Yealink Network Technology CO., LTD. will not be liable for any
damages arising from use of an illegally modified or altered publication.
THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS GUIDE ARE
SUBJECT TO CHANGE WITHOUT NOTICE. ALL STATEMENTS, INFORMATION, AND
RECOMMENDATIONS IN THIS GUIDE ARE BELIEVED TO BE ACCURATE AND PRESENTED
WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL
RESPONSIBILITY FOR THEIR APPLICATION OF PRODUCTS.
YEALINK NETWORK TECHNOLOGY CO., LTD. MAKES NO WARRANTY OF ANY KIND WITH
REGARD TO THIS GUIDE, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Yealink Network Technology
CO., LTD. shall not be liable for errors contained herein nor for incidental or consequential
damages in connection with the furnishing, performance, or use of this guide.
Hereby, Yealink Network Technology CO., LTD. declares that this phone is in conformity
with the essential requirements and other relevant provisions of the CE, FCC.
This device is marked with the CE mark in compliance with EC Directives 2006/95/EC and 2004/108/EC.
This device is compliant with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
1. This device may not cause harmful interference, and
2. This device must accept any 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 SIP-T21(P) E2 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 online:
http://www.yealink.com/GPLOpenSource.aspx?BaseInfoCateId=293&NewsCateId=293&CateId=293.

About This Guide
v
Thank you for choosing the SIP-T21(P) E2 IP phone, exquisitely designed to provide
business telephony features, such as Call Hold, Call Transfer, Busy Lamp Field, Multicast
Paging and Conference over an IP network. The difference between the SIP-T21 E2 and
SIP-T21P E2 IP phones is that only SIP-T21P E2 supports PoE.
This guide provides everything you need to quickly use your new phone. First, verify
with your system administrator that the IP network is ready for phone configuration. Also
be sure to read the Packaging Contents and Regulatory Notices sections in this guide
before you set up and use the SIP-T21(P) E2 IP phone.
Note
Topics provided in this guide include:
Chapter 1 Overview
Chapter 2 Getting Started
Chapter 3 Customizing Your Phone
Chapter 4 Basic Call Features
Chapter 5 Advanced Phone Features
Shared Line, Network Directory and Network Call Log features are hidden for IP phones
in neutral firmware, which are designed for the BroadWorks environment.
Please contact
your system administrator for more information.

User Guide for the SIP-T21(P) E2 IP Phone
vi

Table of Contents
vii
About This Guide ...................................................................... v
In This Guide ......................................................................................................................... v
Table of Contents.....................................................................vii
Overview .................................................................................. 1
Hardware Component Instructions.................................................................................... 1
Icon Instructions.................................................................................................................... 3
LED Instructions..................................................................................................................... 4
User Interfaces ..................................................................................................................... 5
Phone User Interface ........................................................................................................ 6
Web User Interface........................................................................................................... 6
Documentations ................................................................................................................... 8
Getting Started......................................................................... 9
Packaging Contents............................................................................................................. 9
Optional Accessories ..................................................................................................... 10
Phone Installation............................................................................................................... 11
Phone Initialization ............................................................................................................. 13
Phone Status ....................................................................................................................... 13
Basic Network Settings...................................................................................................... 15
Registration ......................................................................................................................... 17
Idle Screen.......................................................................................................................... 17
Customizing Your Phone ......................................................... 19
General Settings ................................................................................................................ 19
Contrast............................................................................................................................ 19
Backlight .......................................................................................................................... 20
Language......................................................................................................................... 20
Time & Date ..................................................................................................................... 21
Administrator Password ................................................................................................. 23
Key as Send..................................................................................................................... 24
Phone Lock....................................................................................................................... 24
Audio Settings .................................................................................................................... 27
Volume ............................................................................................................................. 27
Ring Tones ........................................................................................................................ 27

User Guide for the SIP-T21(P) E2 IP Phone
viii
Contact Management....................................................................................................... 30
Directory........................................................................................................................... 30
Local Directory ................................................................................................................ 31
Blacklist ............................................................................................................................ 41
Remote Phone Book........................................................................................................ 43
Call History Management ................................................................................................ 45
System Customizations...................................................................................................... 47
Logo Customization ........................................................................................................ 47
Headset Use.................................................................................................................... 48
DSS Keys .......................................................................................................................... 50
Account Management ................................................................................................... 59
Dial Plan ........................................................................................................................... 60
Emergency Number........................................................................................................ 66
Live Dialpad .................................................................................................................... 67
Hotline .............................................................................................................................. 68
Basic Call Features................................................................. 69
Placing Calls ....................................................................................................................... 69
Answering Calls ................................................................................................................. 71
Ending Calls........................................................................................................................ 73
Redialing Numbers ............................................................................................................ 73
Recent Call In Dialing ........................................................................................................ 74
Auto Answer ....................................................................................................................... 75
Auto Redial.......................................................................................................................... 76
Call Completion ................................................................................................................. 77
ReCall .................................................................................................................................. 78
Call Mute............................................................................................................................. 79
Call Hold/Resume............................................................................................................... 79
Do Not Disturb (DND) ........................................................................................................ 80
Call Forward ....................................................................................................................... 83
Call Transfer ........................................................................................................................ 90
Call Waiting ........................................................................................................................ 91
Conference ......................................................................................................................... 92
Local Conference............................................................................................................ 92
Network Conference ...................................................................................................... 93
Call Park .............................................................................................................................. 94
Call Pickup .......................................................................................................................... 96
Anonymous Call ............................................................................................................... 101
Anonymous Call Rejection .............................................................................................. 102
Advanced Phone Features....................................................105
Busy Lamp Field (BLF) ..................................................................................................... 105
BLF List ............................................................................................................................... 107

Table of Contents
ix
Call Recording .................................................................................................................. 109
Hot Desking ...................................................................................................................... 111
Intercom ............................................................................................................................ 113
Outgoing Intercom Calls.............................................................................................. 113
Incoming Intercom Calls .............................................................................................. 113
Using Intercom .............................................................................................................. 115
Multicast Paging............................................................................................................... 115
Sending RTP Stream ..................................................................................................... 116
Receiving RTP Stream................................................................................................... 118
Using Multicast Paging................................................................................................. 120
Music on Hold................................................................................................................... 121
Automatic Call Distribution (ACD).................................................................................. 122
Messages.......................................................................................................................... 124
Short Message Service (SMS) .................................................................................... 124
Voice Mail ...................................................................................................................... 126
Message Waiting Indicator (MWI) ............................................................................. 128
Troubleshooting .....................................................................131
Regulatory Notices ................................................................141
Service Agreements ........................................................................................................ 141
Limitations of Liability ...................................................................................................... 141
Safety Instructions ............................................................................................................ 141
Appendix A - Time Zones......................................................143
Index ......................................................................................145

User Guide for the SIP-T21(P) E2 IP Phone
x

Overview
1
This chapter provides the overview of the SIP-T21(P) E2 IP phone. Topics include:
Hardware Component Instructions
Icon Instructions
LED Instructions
User Interfaces
Documentations
If you require additional information or assistance with your new phone, contact your
system administrator.
The main hardware components of the SIP-T21(P) E2 IP phone are the LCD screen and
the keypad.

User Guide for the SIP-T21(P) E2 IP Phone
2
Hardware component instructions of the SIP-T21(P) E2 IP phone are:
Item
Description
①
LCD Screen
Shows information about calls, messages, soft keys,
time, date and other relevant data:
• Call information—caller ID, call duration
• Icons (for example, )
• Missed call text or second incoming caller information
• Prompt text (for example, "Saving config file!")
• Time and date
②
Power Indicator LED
Indicates phone power status and phone status.
③
Line Keys
Use these keys to activate up to two accounts and assign
various features.
④
Soft Key
Label automatically to identify their context-sensitive
features.
⑤
Scroll through the displayed information.
Confirms actions or answers incoming calls.
Cancels actions, rejects incoming calls, mutes or
un-mutes calls.
⑥
MESSAGE Key
Indicates and accesses voice mails.
⑦
HEADSET Key
Toggles the headset mode.
⑧
TRAN Key
Transfers a call to another party.
⑨
RD Key
Redials a previously dialed number.
⑩
Speakerphone Key
Toggles the hands-free speakerphone mode.
⑪
Volume Key
Adjusts the volume of the handset, headset, speaker,
and ringer.
⑫
Keypad
Provides the digits, letters and special characters in
context-sensitive applications.
⑬
Speaker
Provides ringer and hands-free (speakerphone) audio
output.
⑭
Hookswitch
Picking up the handset from the handset cradle, the
hookswitch bounces and the phone connects to the line,
laying the handset down on the handset cradle, the
phone disconnects from the line.
⑮
Hookswitch Tab
Secures the handset in the handset cradle when the IP
phone is mounted vertically. For more information on
how to adjust the hookswitch tab, refer to Yealink Wall
Mount Quick Installation Guide for Yealink IP Phones .

Overview
3
Icons appearing on the LCD screen are described in the following table:
Icon
Description
Network is unavailable
Registered successfully
Register failed
Registering
Hands-free speakerphone mode
Handset mode
Headset mode
Multi-lingual lowercase letters input mode
Multi-lingual uppercase letters input mode
Alphanumeric input mode
Numeric input mode
Multi-lingual uppercase and lowercase
letters input mode
Voice Mail
Text Message
Auto Answer
Do Not Disturb
Call Forwarded/Forwarded Calls
Call Hold
Ringer volume is 0
Phone Lock

User Guide for the SIP-T21(P) E2 IP Phone
4
Icon
Description
Call Mute
Received Calls
Placed Calls
Missed Calls
Recording box is full
A call cannot be recorded
Recording starts successfully
Recording cannot be started
Recording cannot be stopped
The contact icon
Power Indicator LED
LED Status
Description
Solid red
The phone is initializing.
Fast flashing red (300ms)
The phone is ringing.
Slow flashing red (1s)
The phone receives a voice mail or text message.
Off
The phone is powered off.
The phone is idle.
The phone is busy.
The call is placed on hold or is held.
The call is muted.
Line key LED
LED Status
Description
Solid green
The line is seized.
The line is in conversation.
Fast flashing green
The line receives an incoming call.

Overview
5
LED Status
Description
Slow flashing green
The call is placed on hold.
Off
The line is inactive.
Line key LED (configured as a BLF key or BLF List key)
LED Status
Description
Solid green
The monitored user is idle.
Fast flashing red (200ms)
The monitored user receives an incoming call.
Solid red
The monitored user is busy.
The monitored user’s conversation is placed on
hold (This LED status requires server support).
Slow flashing red (1s)
The call is parked against the monitored user’s
phone number.
Off
The monitored user does not exist.
Note
Two ways to customize configurations of your SIP-T21(P) E2 IP phone:
The user interface on the IP phone.
The user interface in a web browser on your PC.
The hardware components keypad and LCD screen constitute the phone user interface,
which allows the user to execute all call operation tasks and basic configuration
changes directly on the phone. In addition, you can use the web user interface to
access all configuration settings. In many cases, either the phone user interface and/or
the web user interface interchangeably. However, in some cases, it is only possible to
use one or the other interface to operate the phone and change settings.
The above introduces the default LED status. The statuses of the power indicator LED and
BLF key are configurable via web user interface. For more information, refer to
Yealink_SIP-T2_Series_T4_Series_IP_Phones_Administrator_Guide.

User Guide for the SIP-T21(P) E2 IP Phone
6
You can customize your phone by pressing the Menu soft key to access the phone user
interface. The Advanced Settings option is only accessible to the administrator, and the
default administrator password is “admin”(case-sensitive). For more information on
customizing your phone with the available options from the phone user interface, refer
to Customizing Your Phone on page 19.
In addition to the phone user interface, you can also customize your phone via web user
interface. In order to access the web user interface, you need to know the IP address of
your new phone. To obtain the IP address, press the OK key on the phone. Enter the IP
address (e.g., http://192.168.0.10 or 192.168.0.10) in the address bar of web browser on
your PC. The default administrator user name and password are both “admin”
(case-sensitive).
The options you can use to customize the IP phone via phone user interface and/or via
web user interface are listed in the following table:
Options
Phone User Interface
Web User Interface
Status
√
√
--IPv4
--MAC
--Firmware
--Network
--Phone
--Accounts
Basic Phone Settings
√
--Contrast
√
--Backlight
√
--Language
√
--Time & Date
√
--Administrator Password
√
--Key as Send
√
--Phone Lock
√
--Ring Tones
√
--Contact Management
x
--Directory
x
--Local Directory
√
--Blacklist
√
--Remote Phone Book
x
--Call History Management
√

Overview
7
Options
Phone User Interface
Web User Interface
--Logo Customization
x
--DSS Keys
√
--Account Management
√
--Dial Plan
x
--Emergency Number
x
--Live Dialpad
x
--Hotline
√
Basic Call Features
√
--Recent Call In Dialing
x
--Auto Answer
√
--Auto Redial
√
--Call Completion
√
--ReCall
√
-- Do Not Disturb (DND)
√
--Call Forward
√
--Call Transfer
√
--Call Waiting
√
--Conference
x
--Call Park
√
--Call Pickup
√
--Anonymous Call
√
--Anonymous Call Rejection
√
Advanced Phone Features
√
--Busy Lamp Field (BLF)
√
--BLF List
x
--Call Recording
√
--Hot Desking
√
--Intercom
√
--Multicast Paging
x
--Music on Hold
x
--Automatic Call Distribution (ACD)
x
--Messages
√
SIP Account
√
--User Options
x
--Register Status
√
--Account Status
√
--Label
√
--Display Name
√
--Register Name
√
--User Name
√
--Password
√

User Guide for the SIP-T21(P) E2 IP Phone
8
Options
Phone User Interface
Web User Interface
--SIP Server 1/2
√
--Server Option
x
--Registrar Port
x
--Outbound Status
√
--Outbound Proxy
√
--NAT Traversal
x
--STUN Status
√
--STUN Server
√
Note
The following table shows documentations available for the SIP-T21(P) E2 IP phone.
Name
Contents
Where found
Language
Quick Start Guide
Basic call features and
phone customizations
In the
package
English
User Guide
Phone/Web user
interface settings
Basic call features and
advanced phone
features
On the
website
English
The table above lists most of the feature options. Please refer to the relevant sections for
more information.

Getting Started
9
This chapter provides basic installation instructions and information for obtaining the
best performance with the SIP-T21(P) E2 IP phone. Topics include:
Packaging Contents
Phone Installation
Phone Initialization
Phone Status
Basic Network Settings
Registration
Idle Screen
If you require additional information or assistance with your new phone, contact your
system administrator.
The following components are included in your SIP-T21(P) E2 IP phone package:
SIP-T21(P) E2 IP Phone

User Guide for the SIP-T21(P) E2 IP Phone
10
Phone Stand
Handset & Handset Cord
Ethernet Cable
Quick Start Guide
Check the list before installation. If you find anything missing, contact your system
administrator.
The following items are optional accessories for your SIP-T21(P) E2 IP phone. You need to
purchase them separately if required.