Yealink SIP-T48G Administrator's Manual page 258

Microsoft Lync Edition Administrator's Guide for SIP-T2_Series and T4_Series IP Phones
indicators on SIP-T22P IP phones:
If a LINK failure of the IP phone is detected, a prompting message "Network

unavailable" and the icon
If a voice mail is received, the MESSAGE key LED illuminates.

For more information on the icons, refer to
Wrong configurations may have an impact on your phone use. You can export
configuration file to check the current configuration of the IP phone and troubleshoot if
necessary. You can also import configuration files for a quick and easy configuration.
Procedure
Configuration changes can be performed using the configuration files or locally.
Configuration File
Local
Details of the Configuration Parameter:
configuration.url
Description:
Configures the access URL for the custom configuration files.
Note: The file format of custom configuration file must be *.bin.
Web User Interface:
Settings->Configuration->Export or Import Configuration
Phone User Interface:
None
246
will appear on the LCD screen.
<y0000000000xx>.cfg
Web User Interface
Parameter
Reading Icons on page 14.
Specify the access URL for the
custom configuration files.
Parameter:
configuration.url
Export or import the custom
configuration files.
Navigate to:
http://<phoneIPAddress>/servlet
?p=settings-config&q=load
Permitted Values
URL within 511 characters
Default
Blank