Yealink SIP-T21 E2 Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones
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Details of the Configuration Parameter:
Parameter
Permitted Values
Default
static.watch_dog.enable
0 or 1
1
Description:
Enables or disables the Watch Dog feature.
0-Disabled
1-Enabled
If it is set to 1 (Enabled), the IP phone will reboot automatically when the system is broken
down.
Web User Interface:
Settings->Preference->Watch Dog
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 Watch Dog.
3. Click Confirm to accept the change.
Getting Information from Status Indicators
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-T46G IP phones:
 If a LINK failure of the IP phone is detected, a prompting message “Network unavailable”
and the icon will appear on the LCD screen.
 If a call is muted, the MUTE key LED illuminates.
For more information on the icons, refer to Appendix G: Reading Icons on page 1043.

Yealink SIP-T21 E2 Specifications

General

Brand	Yealink
Model	SIP-T21 E2
Category	IP Phone
Language	English