YEALINK T21P User Manual

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

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.

with the essential requirements and other relevant provisions of the CE, FCC.

. Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

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.

iii

Yealink SIP-T21P 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.

Note

Shared Line, Busy Lamp Field List, Network Directory and Network Call Log features are

About This Guide

Thank you for choosing the SIP-T21P 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.

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 IP phone.

If this is your first time using the SIP-T21P IP phone, we recommend that you first refer to

the and , available online:

http://www.yealink.com/DocumentDownload.aspx?CateId=142&flag=142.

hidden for IP phones in neutral version, which are designed for BroadWorks environment. Please contact your system administrator for more information.

This is the first edition based on firmware version 71. 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

User Guide for the SIP-T21P IP Phone

Table of Contents

About This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

In This Guide ......................................................................................................................... v

Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v i i

O v e r v i e w .. .. .. .... ............... .... .. .... ............. .. .... .. .. ............... .... .. .. . 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

Volume ............................................................................................................................. 24

Ring Tones ........................................................................................................................ 25

Contact Management ....................................................................................................... 27

Directory........................................................................................................................... 27

vii

User Guide for the SIP-T21P IP Phone

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 ........................................................................................................ 61

Live Dialpad .................................................................................................................... 62

Hotline .............................................................................................................................. 63

Basic Call Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Placing Calls ....................................................................................................................... 65

Answering Calls ................................................................................................................. 67

Ending Calls ........................................................................................................................ 68

Redialing Numbers ............................................................................................................ 69

Recent Call In Dialing ........................................................................................................ 69

Auto Answer ....................................................................................................................... 70

Auto Redial .......................................................................................................................... 71

Call Completion ................................................................................................................. 72

Call Return ........................................................................................................................... 73

Call Mute ............................................................................................................................. 73

Call Hold/Resume ............................................................................................................... 74

Do Not Disturb (DND) ........................................................................................................ 75

Call Forward ....................................................................................................................... 78

Call Transfer ........................................................................................................................ 84

Call Waiting ........................................................................................................................ 86

Conference ......................................................................................................................... 86

Local Conference ............................................................................................................ 87

Network Conference ...................................................................................................... 87

Call Park .............................................................................................................................. 89

Call Pickup .......................................................................................................................... 90

Anonymous Call ................................................................................................................. 95

Anonymous Call Rejection ................................................................................................ 96

Advanced Phone Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Busy Lamp Field (BLF) ....................................................................................................... 97

Call Recording .................................................................................................................... 99

Hot Desking ...................................................................................................................... 101

Intercom ............................................................................................................................ 103

viii

Table of Contents

Outgoing Intercom Calls .............................................................................................. 103

Incoming Intercom Calls .............................................................................................. 103

Multicast Paging ............................................................................................................... 105

Sending RTP Stream ..................................................................................................... 105

Receiving RTP Stream ................................................................................................... 107

Music on Hold ................................................................................................................... 108

Automatic Call Distribution (ACD).................................................................................. 109

Messages .......................................................................................................................... 111

Short Message Service (SMS) .................................................................................... 111

Voice Mail ...................................................................................................................... 113

Message Waiting Indicator (MWI) ............................................................................. 114

Troubleshooting .....................................................................119

Regulatory Notices .... .. .. .. ................... .. .. ...... ............. .. .... .. .. ..129

Service Agreements ........................................................................................................ 129

Limitations of Liability ...................................................................................................... 129

Safety Instructions ............................................................................................................ 129

Appendix A - Time Zones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3 1

I n d e x . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .1 33

User Guide for the SIP-T21P IP Phone

Overview

This chapter provides the overview of the SIP-T21P 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-T21P IP phone are the LCD screen and the

keypad.

User Guide for the SIP-T21P IP Phone

assign

Hardware component instructions of the SIP-T21P IP phone are:

LCD Screen

Power Indicator LED Indicates phone power status and phone status.

Line Keys

MESSAGE Key Indicates and accesses voice mails.

HEADSET Key Toggles the headset mode.

TRAN Key Transfers a call to another party.

RD Key Redials a previously dialed number.

Speakerphone Key Toggles the hands-free speakerphone mode.

Volume Key

Item Description

Shows information about calls, messages, soft keys,

time, date and other relevant data:

caller ID, call duration

(for example, )

"Saving config file!")

Use these keys to activate up to two accounts and

various features.

Adjusts the volume of the handset, headset, speaker,

and ringer.

Keypad

Cancels actions, rejects incoming calls, mutes or

Soft Keys

Provides the digits, letters and special characters in

context-sensitive applications.

Scroll through the displayed information.

Confirms actions or answers incoming calls.

un-mutes calls.

Label automatically to identity their context-sensitive

features.

Icons appearing on the LCD screen are described in the following table:

Icon Description

Overview

Network is unavailable

Registered successfully

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

Call Mute

Ringer volume is 0

User Guide for the SIP-T21P IP Phone

Icon Description

Keypad Lock

Line key LED

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

LED Status Description

The line is in conversation.

Solid green

Fast flashing green

Slow flashing green

Off

The line is seized.

The line receives an incoming call.

The call is placed on hold.

The line is inactive.

Line key LED (configured as BLF key)

LED Status Description

Solid green The monitored user is busy.

Fast flashing green The monitored user receives an incoming call.

Off

The monitored user is idle.

The monitored user does not exist.

Overview

Two ways to customize configurations of your SIP-T21P 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.

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 17.

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

--IP Address

--IPv6

--MAC

--Firmware

--Network

--Phone

--Accounts

Basic Phone Settings

User Guide for the SIP-T21P IP Phone

Options Phone User Interface Web User Interface

--Contrast

--Language

--Time & Date

--Administrator Password

--Key as Send

--Keypad Lock

-- Volume

--Ring Tones

--Contact Management

--Directory

--Local Directory

--Blacklist

--Remote Phone Book

--Call History Management

--Logo Customization

--Headset Prior

--DSS Keys

--Account Registration

--Dial Plan

--Emergency Number

--Live Dialpad

--Hotline

Basic Call Features

--Recent Call In Dialing

--Auto Answer

--Auto Redial

--Call Completion

--Call Return

--DND

--Call Forward

--Call Transfer

--Call Waiting

--Conference

--Call Park

--Call Pickup

--Anonymous Call

--Anonymous Call Rejection

Advanced Phone Features

--BLF

--Call Recording

--Hot Desking

Options Phone User Interface Web User Interface

The table above

lists

most of the

feature options

Please refer to the rel

evant

section

s for

--Intercom

--Multicast Paging

--Music on Hold

--ACD

--Messages

SIP Account

--User Options

--Register Status

--Activation

--Label

--Display Name

--Register Name

--User Name

--Password

--SIP Server1/2

--Server Option

--Server Port

--Outbound Status

--Outbound Proxy

--NAT Traversal

--STUN Status

--STUN Server

Overview

Note

more information.

User Guide for the SIP-T21P IP Phone

The following table shows documentations available for the SIP-T21P IP phone.

Name Contents Where found Format/Language

Quick Installation

Guide

Quick Reference

Guide

Basic setup of the

phone

Basic call features and

phone customizations

Phone/Web user

interface settings

User Guide

Basic call features and

advanced phone

features

Note

You can also download the latest documentations online:

http://www.yealink.com/DocumentDownload.aspx?CateId=142&flag=142.

In the

package

In the

package

CD attached

in the

package

PDF/English

Getting Started

This chapter provides basic installation instructions and information for obtaining the

best performance with the SIP-T21P 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-T21P IP phone package:

SIP-T21P IP Phone

Phone Stand

User Guide for the SIP-T21P IP Phone

Power Adapter

Handset & Handset Cord

Ethernet Cable

Quick Installation Guide & Quick Reference Guide

CD-ROM

Check the list before installation. If you find anything missing, contact your system

administrator.

Getting Started

A h

eadset is not

included

in the pack

ing

contents

. Contact your

system administrator

If your phone is already installed, proceed to Phone Initialization on page 13.

This section introduces how to install the phone:

1) Attach the stand

2) Connect the handset and optional headset

3) Connect the network and power

1) Attach the stand

2) Connect the handset and optional headset

Note

for more information.

3) Connect the network and power

You have two options for power and network connections. Your system administrator will

advise you which one to use.

AC power

Power over Ethernet (PoE)

User Guide for the SIP-T21P IP Phone

If in

AC Power

To connect the AC power:

1. Connect the DC plug on the power adapter to the DC5V port on the phone and

connect the other end of the power adapter into an electrical power outlet.

2. Connect the included or a standard Ethernet cable between the Internet port on the

phone and the one on the wall or switch/hub device port.

Power over Ethernet

Note

With the included or a regular Ethernet cable, the SIP-T21P IP phone can be powered

from a PoE-compliant switch or hub.

To connect the PoE:

1. Connect the Ethernet cable between the Internet port on the phone and an

available port on the in-line power switch/hub.

adapter. Make sure the switch/hub is PoE-compliant.

The phone can also share the network with another network device such as a PC (personal computer). It is an optional connection.

Important! Do not unplug or remove power to the phone while it is updating firmware and configurations.

Getting Started

After your phone is powered on, the system boots up and performs the following steps:

Automatic Phone Initialization

The phone finishes the initialization by loading the saved configuration. The LCD screen

DHCP (Dynamic Host Configuration Protocol)

The phone attempts to contact a DHCP server in your network to obtain valid IPv4 and

IPv6 network settings (e.g., IP address, subnet mask, default gateway address and DNS

address) by default.

Note

If your network does not use DHCP, proceed to Basic Network Settings on page 14.

You can view phone status via phone user interface or web user interface.

Available information of phone status includes:

Network status (e.g., IPv4 status, IPv6 status, IP mode and MAC address).

Phone status (e.g., device model, hardware version, firmware version, product ID,

MAC address and device certificate status: factory, installed and not installed).

Account status (e.g., the register status of SIP accounts).

To view the phone status via phone user interface:

1. Press , or press Menu->Status.

2. Press or to scroll through the list and view the specific information.

To view the phone status via web user interface:

1. Open the web browser of your computer.

2. Enter the IP addres , and then press Enter.

User Guide for the SIP-T21P IP Phone

3. Enter the user name (admin) and password (admin) in the login page.

4. Click Confirm to login.

The phone status is displayed on the first page of the web user interface.

If your phone cannot contact a DHCP server for any reason, you need to configure

network settings manually. The IP phone can support either or both IPv4 and IPv6

addresses.

To configure the IP address mode via phone user interface:

1. Press Menu->Settings->Advanced Settings (password: admin) ->Network->WAN

Getting Started

Port.

2. Press or to select IPv4, IPv6 or IPv4 & IPv6 from the IP Mode field.

3. Press the Save soft key to accept the change or the Back soft key to cancel.

To configure a static IPv4 address via phone user interface:

1. Press Menu->Settings->Advanced Settings (password: admin) ->Network->WAN

Port->IPv4->Static IP Client.

2. Enter the desired values in the IP Address, Subnet Mask, Default Gateway, Pri.DNS

and Sec.DNS fields respectively.

3. Press the Save soft key to accept the change or the Back soft key to cancel.

To configure a static IPv6 address via phone user interface:

1. Press Menu->Settings->Advanced Settings (password: admin) ->Network->WAN

Port->IPv6->Static IPv6 Client.

2. Enter the desired values in the IPv6 , IPv6 Prefix, IPv6 Gateway, IPv6 Pri.DNS and

IPv6 Sec.DNS fields respectively.

3. Press the Save soft key to accept the change or the Back soft key to cancel.

If you are using an xDSL modem for IPv4 network connection, you can connect your

phone to the Internet via PPPoE mode. Set the WAN port as a PPPoE port. The PPPoE port

will perform a PPP negotiation to obtain the IP address. Contact your system

administrator for the PPPoE user name and password.

User Guide for the SIP-T21P IP Phone

Using the wrong network parameters may result in inaccessibility of your phone and may

To configure PPPoE via phone user interface:

1. Press Menu->Settings->Advanced Settings (password: admin) ->Network->WAN

Port->IPv4->PPPoE IP Client.

2. Enter the user name and password in the corresponding fields.

3. Press the Save soft key to accept the change or the Back soft key to cancel.

Note

also have an impact on your network performance. For more information on these parameters, contact your system administrator.

Generally, your phone will be deployed with multiple other phones. In this case, your

system administrator will configure the phone parameters beforehand, so that after you

start up your phone, the phone will be registered and ready for use. If your phone is not

registered, you may have to register it. For more information on how to register your

phone, refer to Account Management on page 54.

If the phone has successfully started up, the idle screen will be shown as below:

The idle screen shows the label of current account, time and date, and four soft keys.

Customizing Your Phone

You can customize your SIP-T21P IP phone by personally configuring certain settings, for

example, contrast, language and time & date.

local directory manually or from call history. You can also personalize different ring

tones for different callers.

This chapter provides basic operating instructions for customizing your phone. Topics

include:

General Settings

Audio Settings

Contact Management

Call History Management

System Customizations

If you require additional information or assistance with your new phone, contact your

system administrator.

You can configure the contrast of the LCD screen to a comfortable level.

To configure the contrast via phone user interface:

1. Press Menu->Settings->Basic Setting->Contrast.

2. Press or , or the Switch soft key to increase or decrease the intensity of

contrast.

The default contrast level is 6.

3. Press the Save soft key to accept the change or the Back soft key to cancel.

Contrast is configurable via web user interface at the path Settings->Preference.

User Guide for the SIP-T21P IP Phone

Not a

of the

support

ed l

anguages

are available for selection. The available languages

The default language of the phone user interface is English. The phone will detect and

use the same language as which of your web browser for the web user interface. If the

language of your web browser is not supported by the phone, the web user interface

will use English. You can change the language for the phone user interface and the web

user interface respectively.

Note

depend on the language packs currently loaded to the IP phone. Please contact your system administrator for more information on the available languages of your new phone.

To change the language for the phone user interface:

1. Press Menu->Settings->Basic Setting->Language.

2. Press or to select the desired language.

3. Press the Save soft key to accept the change.

Text displayed on the LCD screen will change to the selected language.

To change the language for the web user interface:

1. Click on Settings->Preference.

2. Select the desired language from the pull-down list of Language.

Customizing Your Phone

lease refer to

Appendix A

- Time Zones

for

the list of available time zones on the IP

3. Click Confirm to accept the change.

Text displayed on the web user interface will change to the selected language.

The time and date are displayed on the LCD screen when the phone is idle. If the phone

cannot obtain the time and date from the Simple Network Time Protocol (SNTP) server,

you need to configure the time and date manually. For more information on the SNTP

server, contact your system administrator.

To configure the SNTP settings via phone user interface:

1. Press Menu->Settings->Basic Setting->Time & Date->SNTP Settings.

Note

2. Press or , or the Switch soft key to select the time zone that applies to your

area from the Time Zone field.

The default time zone is "+8 China(Beijing)".

3. Enter the domain names or IP addresses in the NTP Server 1 and NTP Server 2 fields

respectively.

4. Press or , or the Switch soft key to select the desired value from the DST

field.

5. Press the Save soft key to accept the change or the Back soft key to cancel.

phone.

To configure the time and date manually via phone user interface:

1. Press Menu->Settings->Basic Setting->Time & Date->Manual Settings.

2. Enter the specific date in the Date field.

3. Enter the specific time in the Time field.

User Guide for the SIP-T21P IP Phone

4. Press the Save soft key to accept the change.

The date and time displayed on the LCD screen will change accordingly.

To configure the time and date format via phone user interface:

1. Press Menu->Settings->Basic Setting->Time & Date->Time & Date Format.

2. Press or , or the Switch soft key to select the desired time format from the

Clock field.

3. Press or , or the Switch soft key to select the desired date format from the

Date Format field.

4. Press the Save soft key to accept the change or the Back soft key to cancel.

There are 7 available date formats. For example, for WWW DD MMM ,

WWW represents the abbreviation of the week DD s the two-digit day,

MMM s the first three letters of the month.

The date formats you need to know:

Date Format Example(2013-1-16)

WWW MMM DD

DD-MMM-YY

YYYY-MM-DD

DD/MM/YYYY

MM/DD/YY

DD MMM YYYY

WWW DD MMM

Wed Jan 16

16-Jan-13

2013-01-16

16/01/2013

01/16/13

16 Jan 2013

Wed 16 Jan

Time and date is configurable via web user interface at the path Settings->Time & Date.

The Advanced Settings option is only accessible to the administrator. The default

administrator password is admin . For security reasons, you should change the default

administrator password as soon as possible.

+ 114 hidden pages

YEALINK T21P User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual