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Yealink T21 User Manual

Yealink T21
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Vox Centrex Yealink T20/T21 User Guide
Author Dale Ellwood
Department: Vox Telecom R&D
Date: September 2014

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Yealink T21 Specifications

General IconGeneral
Power over Ethernet (PoE)Yes (IEEE 802.3af)
Number of SIP Accounts2
Ethernet Ports2 (10/100 Mbps)
VoIP ProtocolsSIP
Voice CodecsG.711, G.729, iLBC
SpeakerphoneYes
HD VoiceYes
Power Supply5V DC
Operating Temperature0°C to 40°C
Humidity10% to 95% (non-condensing)

Summary

Keypad Overview

Navigation and Control Keys

Icon Meanings

Keypad Lock Functionality

Directory Management

Adding Directory Entries

Instructions for adding new contacts to the phone's directory, including name and number.

Editing or Deleting Directory Entries

Steps to modify or remove existing contacts from the phone's directory.

Black List Feature

Call Handling Operations

Dialing from Directory

Procedure for making calls using saved entries in the phone's directory.

Making and Managing Calls

Guidance on initiating calls, placing calls on hold, making a second call, and answering incoming calls.

Call Management Features

Denying Incoming Calls

How to reject an incoming call and send it directly to voicemail.

Call History Access

Steps to view logs of dialled, received, missed, and forwarded calls.

Do Not Disturb (DND) Setting

Instructions to enable or disable the DND feature, redirecting calls to voicemail.

Call Forwarding Configuration

Guide to setting up call forwarding for different scenarios like always, busy, or no answer.

Advanced Call Features

Call Waiting Setup

How to enable or disable the feature allowing acceptance of new calls during an active call.

Call Transfer Methods

Instructions for performing blind and announced transfers of calls to other parties.

Establishing 3-Way Conferences

Steps to set up and manage conference calls with three participants.

Call Pick Up Functionality

How to answer calls ringing at other extensions within or outside a pickup group.

Voicemail System

Setting Up Voicemail

Guide to accessing and configuring voicemail settings, including password and greetings.

Retrieving Voicemail Messages

Instructions on how to access, listen to, delete, and save voicemail messages.

Customer Self-Care Portal

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