Yealink SIP-T27G 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-T27G Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black, Gold
Wall mountable	Yes
Display diagonal	3.66 \
Display resolution	240 x 120 pixels
RJ-9 ports quantity	2
USB 2.0 ports quantity	1
Voice codecs	CNG, G.711, G.722, G.723.1, G.726, G.729, G.729ab, VAD, iLBC
Dual-Tone Multi-Frequency (DTMF) modes	SIP info
Lines quantity	8 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	6
Bluetooth	-
Security algorithms	AES, MD5
Networking standards	IEEE 802.1Q, IEEE 802.1p, IEEE 802.1x, IEEE 802.3af
Ethernet LAN interface type	Gigabit Ethernet
Volume control	Digital
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %
Cables included	LAN (RJ-45)
Number of handles included	1 pc(s)
Harmonized System (HS) code	85171800

Weight and Dimensions

Depth	210 mm
Width	265 mm
Height	170.5 mm