Yealink SIP-T4X Administration Manual page 7

Administrator's Guide for SIP-T4X IP Phones
Chapter 3,

on IP phones.
Chapter 4,

advanced features on IP phones.
Chapter 5,

on IP phones.
Chapter 6,

features on IP phones.
Chapter 7,

phones.
Chapter 8,

by IP phones.
Chapter 9, "Troubleshooting" describes how to troubleshoot IP phones and

provides some common troubleshooting solutions.
Chapter 10, "Appendix" provides the glossary, reference information about IP

phones compliant with RFC 3261, SIP call flows and sample configuration files.
This section describes the changes to this guide for each release and guide version.
The following sections are new for this version:
Power Indicator LED
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Contrast on page
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Major updates have occurred to the following sections:
DHCP on page
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Backlight

Time and Date
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Key as Send

Anonymous Call

Busy Lamp Field

Action URL

IPv6 Support

Transport Layer Security
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vi
"Configuring Basic Features" describes how to configure basic features
"Configuring Advanced
"Configuring Audio Features" describes how to configure audio features
"Configuring Security
"Upgrading Firmware" describes how to upgrade the firmware of IP
"Resource Files" describes the resource files that can be downloaded
on page 36
38
18
on page 41
on page 47
on page 59
on page 75
on page 136
on page 156
on page 187
on page
Features" describes how to configure
Features" describes how to configure security
203