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Yealink SIP-T21 User Manual

Yealink SIP-T21
143 pages
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T21P & T21
User Guide
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Yealink SIP-T21 Specifications

General IconGeneral
Lines2
SIP Accounts2
Wall MountableYes
Operating Temperature0°C to 40°C
Handset ConnectorRJ9
HandsetYes
Audio CodecsG.722, G.711, G.726, G.729AB, iLBC
Network Interface10/100 Mbps Ethernet
Protocols SupportedSIP
Ethernet Ports2
PoE SupportYes
Operating Humidity10% to 90% (non-condensing)
Supported LanguagesEnglish, German, Italian, Russian, Spanish, Polish
Headset PortRJ9

Summary

Overview

Getting Started

Packaging Contents

List of items included in the phone's package.

Phone Installation

Step-by-step instructions for physically setting up the IP phone.

Phone Initialization

Process for booting up and configuring the phone for the first time.

Phone Status

How to check network, device, and account status information.

Basic Network Settings

Configuration of IP address, subnet mask, gateway, and DNS.

Registration

Procedure for registering the phone with a SIP server.

Idle Screen

Description of the phone's display when not in use.

Customizing Your Phone

Contact Management

Managing local directories, blacklists, and remote phone books.

Call History Management

Viewing, adding, and deleting call history entries.

Basic Call Features

Placing Calls

Methods for initiating phone calls using the handset, speakerphone, or headset.

Answering Calls

Procedures for receiving incoming calls via different audio devices.

Ending Calls

How to terminate an active phone call.

Call Hold/Resume

Placing active calls on hold and retrieving them later.

Do Not Disturb (DND)

Activating and configuring DND to reject incoming calls.

Advanced Phone Features

Troubleshooting

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