Yealink T40G Configuring Guide

Yealink IP Phones Configuring Guide
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Password Issues
How to restore the administrator password?
Factory reset can restore the original password. All custom settings will be overwritten after
reset.
Power and Startup Issues
What will happen if I connect both PoE cable and power
adapter? Which has the higher priority?
IP phones use the PoE preferentially.
Why does the IP phone have no power?
If no lights appear on the IP phone when it is powered up, do one of the following:
 Reboot your IP phone.
 Replace the power adapter.
Why is the LCD screen black?
If the power indicator LED is on, the keypad is usable but the LCD screen is black, please reboot
your IP phone.

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