Yealink T40G Administrator's Guide

Troubleshooting
576
Rebooting the IP Phone via Web User Interface
Rebooting the IP Phone Remotely
You can reboot the IP phones remotely using a SIP NOTIFY message with “Event: check-sync” header.
Whether the IP phone reboots or not depends on the value of the parameter “sip.notify_reboot_enable”.
If the value is set to 1, or the value is set to 0 and the header of the SIP NOTIFY message contains an
additional string “reboot=true”, the IP phone will reboot immediately.
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
Topic
Notify Reboot Configuration
Notify Reboot Configuration
The following table lists the parameters you can use to configure notify reboot.
Parameter
sip.notify_reboot_enable
<y0000000000xx>.cfg
Description
It configures the IP phone behavior when receiving a SIP NOTIFY message which
contains the header “Event: check-sync”.
Permitted
Values
0-The IP phone will reboot only if the SIP NOTIFY message contains an additional
string “reboot=true”.
1-The IP phone will reboot.
2-The IP phone will ignore the SIP NOTIFY message.
Default
1
Rebooting the IP Phone via Phone User Interface
You can reboot your IP phone via phone user interface.
Procedure
1. Press Menu->Basic->Reboot.
2. Press the OK soft key to reboot the phone.
The phone begins rebooting. Any reboot of the phone may take a few minutes.

Yealink T40G Specifications

General

SIP Accounts	3
Wall Mountable	Yes
Opus Codec	No
Display	2.3 inch 132x64-pixel graphical LCD
Network	Dual-port Gigabit Ethernet
PoE	Yes
Headset Support	Yes, RJ9 port
Power Adapter	Optional
Voice Codecs	G.722, G.711(A/μ), G.729AB, G.726
Local Phonebook	1000 entries