Yealink SIP-T48G Administrator's Manual page 6

Administrator's Guide for SIP-T2_Series_T4_Series IP Phones
advanced features on IP phones.
Chapter 5,

features on IP phones.
Chapter 6,

features on IP phones.
Chapter 7,

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 the sample configuration files.
This section describes the changes to this guide for each release and guide version.
This version is updated to incorporate SIP-T48G IP phones. Documentations of the newly
released SIP-T27P and SIP-T21(P) E2 IP phones have also been added.
Major updates have occurred to the following sections:
Reading Icons

Configuration Files

Power Indicator LED

Backlight

Phone Lock

Time and Date

Auto Answer

Return Code When Refuse

DTMF on page

Appendix B: Time Zones

This version is updated to incorporate SIP-T46G, SIP-T42G, SIP-T41P and SIP-T29G IP
phones. The following sections are new for this version:
Wallpaper

vi
"Configuring Audio Features" describes how to configure the audio
"Configuring Security
"Resource Files" describes the resource files that can be downloaded
on page 23
on page 26
on page 58
on page 70
on page 84
on page 92
on page 167
on page
265
on page
on page 66
Features" describes how to configure the security
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