Yealink SIP-T40G Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
387
manually.
Default
1
Supported
Devices
All phones except CP920
Parameter
features.dnd.emergency_enable <y0000000000xx>.cfg
Description
It enables or disables the phone to receive incoming calls from authorized numbers when the DND
feature is enabled.
Note: The authorized numbers are configured by the parameter “features.dnd.emergency_author-
ized_number”. It works only if “features.dnd.allow” is set to 1 (Enabled).
Permitted
Values
0-Disabled
1-Enabled
Default
0
Web UI
Features > Forward&DND > DND > DND Emergency
Parameter
features.dnd.emergency_authorized_number <y0000000000xx>.cfg
Description
It configures the authorized numbers the phone can receive incoming calls from even if DND feature
is activated.
Multiple numbers are separated by commas.
Example:
features.dnd.emergency_authorized_number = 123,124
Note: It works only if “features.dnd.allow” and “features.dnd.emergency_enable” are set to 1
(Enabled).
Permitted
Values
String within 511 characters
Default
Blank
Web UI
Features > Forward&DND > DND > DND Authorized Numbers
Parameter
features.dnd_refuse_code <y0000000000xx>.cfg
Description
It configures a return code and reason of SIP response messages when rejecting an incoming call by
DND. A specific reason is displayed on the caller’s phone screen.
Note: It works only if “features.dnd.allow” is set to 1 (Enabled).
Permitted
Values
404-Not Found
480-Temporarily Unavailable
486-Busy Here, the caller’s phone screen will display the reason “Busy Here” when the callee
enables DND feature.
600-Busy Everywhere
603-Decline
Default
480
Web UI
Features > General Information > Return Code When DND
Parameter
features.dnd.large_icon.enable <y0000000000xx>.cfg
Description
It enables or disables the phone to display a large DND icon on the idle screen.
Note: It works only if “features.dnd.allow” is set to 1 (Enabled).

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