Yealink SIP-T40G Auto Provisioning Guide

Troubleshooting
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Troubleshooting
This chapter provides general troubleshooting information to help you solve problems you
might encounter when deploying phones.
If you require additional information or assistance with the deployment, contact your system
administrator.
Why does the IP phone fail to download configuration files?
 Ensure that auto provisioning feature is configured properly.
 Ensure that the provisioning server and network are reachable.
 Ensure that authentication credentials configured on the IP phone are correct.
 Ensure that configuration files exist on the provisioning server.
 Ensure that MAC-Oriented boot file and common boot file don’t exist simultaneously on
the provisioning server. If both exist, the IP phone only downloads MAC-Oriented boot file
and the configuration files referenced in the MAC-Oriented boot file.
Why does the IP phone fail to authenticate the provisioning server during auto
provisioning?
 Ensure that the certificate for the provisioning server has been uploaded to the phone’s
trusted certificates list. If not, do one of the following:
- Import the certificate for the provisioning server to the phone’s trusted certificates list
(at phone’s web path Security->Trusted Certificates->Import Trusted Certificates).
- Disable the IP phone to only trust the server certificates in the trusted certificates list
(at phone’s web path Security->Trusted Certificates->Only Accept Trusted
Certificates).
Why does the provisioning server return HTTP 404?
 Ensure that the provisioning server is properly set up.
 Ensure that the access URL is correct.
 Ensure that the requested files exist on the provisioning server.
Why does the IP phone display "Network unavailable"?
 Ensure that the Ethernet cable is plugged into the Internet port on the IP phone and the
Ethernet cable is not loose.
 Ensure that the switch or hub in your network is operational.
 Ensure that the configurations of network are properly set in the configuration files.

Yealink SIP-T40G Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Wall mountable	Yes
Wi-Fi	No
Security algorithms	AES, HTTPS, SSL/TLS
Networking standards	IEEE 802.3af
Ethernet LAN interface type	Gigabit Ethernet
Supported network protocols	FTP, TFTP, HTTP, HTTPS
Voice codecs	G.711, G.711a, G.711u, G.722, G.726, G.729ab
RJ-11 ports quantity	1
Ethernet LAN (RJ-45) ports	2
AC adapter input voltage	100 - 240 V
AC adapter output current	0.6 A
AC adapter output voltage	5 V
Power consumption (typical)	1.6 W
Certification	CE, FCC, ISO 9001
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 90 %
Volume control	Digital
Display diagonal	2.3 \
Display resolution	132 x 64 pixels
Lines quantity	3 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	3
Number of handles included	1 pc(s)

Weight and Dimensions

Depth	175 mm
Width	212 mm
Height	54 mm