Yealink SIP-T21 E2 Administrator's Guide

Table of Contents
xix
Connecting the Optional USB Flash Drive (Only Applicable to SIP-
T54S/T52S/T48G/T48S/T46G/T46S/T42S/T41S/T29G/T27G/CP860/CP920 IP phones)................... 36
Connecting the Optional Expansion Microphones (Only Applicable to CP860 IP Phones) ........... 38
Connecting the Optional PC or Mobile Device (only applicable to CP860 IP phones) .................... 38
Connecting the Optional Expansion PSTN Box CPN10 (Only Applicable to CP860/CP920 IP
Phones) .............................................................................................................................................................................. 39
Initialization Process Overview .......................................................................................................................................... 41
Verifying Startup ..................................................................................................................................................................... 42
Setting Up Your System .............................................................. 45
Setting Up Your Phone Network ...................................................................................................................................... 45
DHCP ................................................................................................................................................................................... 46
DHCP Option ................................................................................................................................................................... 50
Configuring Network Parameters Manually ....................................................................................................... 56
Configuring Transmission Methods of the Internet Port and PC Port .................................................... 61
Configuring PC Port Mode ........................................................................................................................................ 65
Web Server Type ............................................................................................................................................................ 66
Wi-Fi .................................................................................................................................................................................... 70
VLAN ................................................................................................................................................................................... 76
IPv6 Support .................................................................................................................................................................... 88
VPN ...................................................................................................................................................................................... 97
Network Address Translation (NAT) .................................................................................................................... 100
Quality of Service (QoS) ............................................................................................................................................ 118
802.1X Authentication ............................................................................................................................................... 121
Setting Up Your Phones with a Provisioning Server .............................................................................................. 132
Provisioning Points to Consider ............................................................................................................................ 132
Provisioning Methods ................................................................................................................................................ 133
Boot Files, Configuration Files and Resource Files ........................................................................................ 136
Setting Up a Provisioning Server .......................................................................................................................... 145
Upgrading Firmware ................................................................................................................................................... 148
Keeping User Personalized Settings after Auto Provisioning ................................................................... 158
Configuring Basic Features ....................................................... 169
Power Indicator LED ............................................................................................................................................................. 171
Notification Popups ............................................................................................................................................................. 177
Contrast ..................................................................................................................................................................................... 180
Wallpaper ................................................................................................................................................................................. 182
Transparency ........................................................................................................................................................................... 189
Screen Saver ............................................................................................................................................................................ 191
Power Saving .......................................................................................................................................................................... 199
Backlight ................................................................................................................................................................................... 203
Idle Clock Display .................................................................................................................................................................. 208
Bluetooth .................................................................................................................................................................................. 209

Yealink SIP-T21 E2 Specifications

General

Brand	Yealink
Model	SIP-T21 E2
Category	IP Phone
Language	English