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Yealink SIP-T21 E2 Administrator's Guide

Yealink SIP-T21 E2
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Setting Up Your System
121
3. Enter the desired value in the SIP QoS (0~63) field.
4. Click Confirm to accept the change.
A dialog box pops up to prompt that the settings will take effect after a reboot.
5. Click OK to reboot the phone.
802.1X Authentication
IEEE 802.1X authentication is an IEEE standard for Port-based Network Access Control (PNAC),
part of the IEEE 802.1 group of networking protocols. It offers an authentication mechanism for
devices to connect/link to a LAN or WLAN.

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Yealink SIP-T21 E2 Specifications

General IconGeneral
BrandYealink
ModelSIP-T21 E2
CategoryIP Phone
LanguageEnglish

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