Yealink SIP-T40G Auto Provisioning Guide

Triggering the IP Phone to Perform Auto Provisioning
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in CFG Files or Administrator Guide for your phone on Yealink Technical Support. This method
requires server support.
The following figure shows the message flow:
Auto Provisioning via Activation Code
In addition to the updating modes introduced above, users can trigger IP phones to perform
auto provisioning by dialing an activation code. To use this method, the activation code and the
provisioning server URL need to be pre-configured on the IP phones. This method works only if
there is no registered account on the IP phone. It is usually used for IP phones distributed by
retail sales. It has the advantage that the IP phones do not need to be handled (e.g., registering
account) before sending them to end-users.

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