Yealink SIP-T48G Administrator's Manual page 6

Microsoft Lync Edition Administrator's Guide for SIP-T2_Series and T4_Series IP Phones
Chapter 6,

features on IP phones.
Chapter 7, "Troubleshooting" describes how to troubleshoot IP phones and

provides some common troubleshooting solutions.
Chapter 8, "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.
Major update has occurred to the following section:
Viewing Log Files

vi
"Configuring Security Features" describes how to configure the security
on page 237