Yealink SIP-T21 User manual

T21P & T21
User Guide

Copyright © 2013 YEALINK NETWORK TECHNOLOGY CO., LTD
Copyright © 2013 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
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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-T21P/SIP-T21 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-T21P/SIP-T21 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-T21P and
SIP-T21 IP phone is that the former supports PoE, while the latter does not.
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-T21P/SIP-T21 IP phone.
If this is your first time using the SIP-T21P/SIP-T21 IP phone, we recommend that you first
refer to the Quick Installation Guide and Quick Reference Guide , available online:
http://www.yealink.com/SupportDownloadfiles_detail.aspx?CateId=333&flag=142.
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
This section describes the changes to this guide for each release and guide version.
Major updates have occurred to the following sections:
LED Instructions on page 4
Shared Line, Busy Lamp Field List, Network Directory and Network Call Log features are
hidden for IP phones in neutral firmware version, which are designed for BroadWorks
environment. Please contact your system administrator for more information.

User Guide for the SIP-T21P/SIP-T21 IP Phone
vi
Anonymous Call on page 93
Documentations of the SIP-T21 IP phone have also been added.
Major updates have occurred to the following sections:
LED Instructions on page 4
Anonymous Call on page 93
Troubleshooting on page 117

Table of Contents
vii
About This Guide ...................................................................... v
In This Guide ......................................................................................................................... v
Summary of Changes.......................................................................................................... v
Changes for Release 72, Guide Version 72.1 ................................................................ v
Changes for Release 71, Guide Version 71.91 ............................................................. vi
Changes for Release 71, Guide Version 71.90 ............................................................. vi
Table of Contents.....................................................................vii
Overview .................................................................................. 1
Hardware Component Instructions.................................................................................... 1
Icon Instructions.................................................................................................................... 3
LED Instructions..................................................................................................................... 4
User Interfaces ..................................................................................................................... 5
Phone User Interface........................................................................................................ 5
Web User Interface........................................................................................................... 5
Documentations ................................................................................................................... 8
Getting Started......................................................................... 9
Packaging Contents............................................................................................................. 9
Phone Installation............................................................................................................... 11
Phone Initialization ............................................................................................................. 13
Phone Status ....................................................................................................................... 13
Basic Network Settings...................................................................................................... 14
Registration ......................................................................................................................... 16
Idle Screen.......................................................................................................................... 16
Customizing Your Phone ......................................................... 17
General Settings ................................................................................................................ 17
Contrast............................................................................................................................ 17
Language......................................................................................................................... 18
Time & Date ..................................................................................................................... 19
Administrator Password ................................................................................................. 20
Key as Send..................................................................................................................... 21
Keypad Lock.................................................................................................................... 21
Audio Settings .................................................................................................................... 24

User Guide for the SIP-T21P/SIP-T21 IP Phone
viii
Volume ............................................................................................................................. 24
Ring Tones ........................................................................................................................ 25
Contact Management....................................................................................................... 27
Directory........................................................................................................................... 27
Local Directory ................................................................................................................ 28
Blacklist ............................................................................................................................ 38
Remote Phone Book........................................................................................................ 40
Call History Management ................................................................................................ 42
System Customizations...................................................................................................... 44
Logo Customization ........................................................................................................ 44
Headset Use.................................................................................................................... 45
DSS Keys .......................................................................................................................... 46
Account Management ................................................................................................... 54
Dial Plan ........................................................................................................................... 55
Emergency Number........................................................................................................ 60
Live Dialpad .................................................................................................................... 61
Hotline .............................................................................................................................. 62
Basic Call Features................................................................. 63
Placing Calls ....................................................................................................................... 63
Answering Calls ................................................................................................................. 65
Ending Calls........................................................................................................................ 66
Redialing Numbers ............................................................................................................ 67
Recent Call In Dialing ........................................................................................................ 67
Auto Answer ....................................................................................................................... 68
Auto Redial.......................................................................................................................... 69
Call Completion ................................................................................................................. 70
Call Return........................................................................................................................... 71
Call Mute............................................................................................................................. 71
Call Hold/Resume............................................................................................................... 72
Do Not Disturb (DND) ........................................................................................................ 73
Call Forward ....................................................................................................................... 76
Call Transfer ........................................................................................................................ 82
Call Waiting ........................................................................................................................ 84
Conference ......................................................................................................................... 84
Local Conference............................................................................................................ 85
Network Conference ...................................................................................................... 85
Call Park .............................................................................................................................. 87
Call Pickup .......................................................................................................................... 88
Anonymous Call ................................................................................................................. 93
Anonymous Call Rejection ................................................................................................ 94
Advanced Phone Features..................................................... 95

Table of Contents
ix
Busy Lamp Field (BLF) ....................................................................................................... 95
Call Recording .................................................................................................................... 97
Hot Desking ........................................................................................................................ 99
Intercom ............................................................................................................................ 101
Outgoing Intercom Calls.............................................................................................. 101
Incoming Intercom Calls .............................................................................................. 101
Multicast Paging............................................................................................................... 103
Sending RTP Stream ..................................................................................................... 103
Receiving RTP Stream................................................................................................... 105
Music on Hold................................................................................................................... 106
Automatic Call Distribution (ACD).................................................................................. 107
Messages.......................................................................................................................... 109
Short Message Service (SMS) .................................................................................... 109
Voice Mail ...................................................................................................................... 111
Message Waiting Indicator (MWI) ............................................................................. 112
Troubleshooting .....................................................................117
Regulatory Notices ................................................................127
Service Agreements ........................................................................................................ 127
Limitations of Liability ...................................................................................................... 127
Safety Instructions ............................................................................................................ 127
Appendix A - Time Zones......................................................129
Index ......................................................................................131