Yealink SIP-T21 E2 Administrator's Guide

Troubleshooting
999
The NOTIFY message is formed as shown:
NOTIFY sip:<user>@<dsthost> SIP/2.0
To: sip:<user>@<dsthost>
From: sip:sipsak@<srchost>
CSeq: 10 NOTIFY
Call-ID: 1234@<srchost>
Event: check-sync;reboot=true
Procedure
Changes can only be configured using the configuration files.
Central Provisioning
(Configuration File)
<y0000000000xx>.cfg
Configure the IP phone behavior
when receiving a SIP NOTIFY
message which contains the
header “Event: check-sync”.
Parameter:
sip.notify_reboot_enable
Details of the Configuration Parameter:
Parameter
Permitted Values
Default
sip.notify_reboot_enable
0, 1 or 2
1
Description:
Configure the IP phone behavior when receiving a SIP NOTIFY message which contains the
header “Event: check-sync”.
0-The IP phone will reboot only if the SIP NOTIFY message contains an additional string
“reboot=true”.
1-The IP phone will be forced to reboot.
2-The IP phone will ignore the SIP NOTIFY message.
Web User Interface:
None
Phone User Interface:
None
How to reboot the IP phone via web/phone user interface?
You can reboot your IP phone via web/phone user interface.

Yealink SIP-T21 E2 Specifications

General

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