Yealink SIP-T48G Administrator's Manual page 549

Parameter
Settings->Preference->WatchDog
Phone User Interface:
None
To configure watch dog feature via web user interface:
1. Click on Settings->Preference.
2. Select the desired value from the pull-down list of WatchDog.
3. Click Confirm to accept the change.
Status indicators may consist of the power LED, MESSAGE key LED, line key indicator,
headset key indicator and the on-screen icon.
The following shows two examples of obtaining the IP phone information from status
indicators on SIP-T23G 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
configurations may have an impact on your phone use. You can export
Wrong
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.
Three types of configuration files can be exported to your local system: config.bin,
<mac>-all.cfg and <mac>-local.cfg. The <mac>-all.cfg configuration file contains all
changes made via phone user interface, web user interface and using configuration
Permitted Values
will appear on the LCD screen.
Reading Icons on page 23.
Troubleshooting
Default
535