Yealink SIP-T27G Administrator's Guide

Phone Customization
197
X starts from 14, “name” is replaced with the language name
Default
Blank
Parameter
wui_lang.delete <y0000000000xx>.cfg
Description
It deletes the specified or all custom web language packs and note language packs of the web user
interface.
Permitted
Values
http://localhost/all or http://localhost/Y.name.js
Y starts from 014, “name” is replaced with the language name
Default
Blank
Contrast
Contrast determines the readability of the texts displayed on the LCD screen. Adjusting the contrast to a com-
fortable level can optimize the screen viewing experience.
You can adjust the contrast for T53W/T53/T43U/T40P/T40G/T27G/T23P/T23G/T21(P) E2/T19(P) E2/CP920 phones,
or for expansion module EXP20 (connected to T29G/T27G phones), EXP40 (connected to T48S/T48G/T46S/T46G
phones).
Topic
Contrast Configuration
Contrast Configuration
The following table lists the parameters you can use to adjust contrast for the phone.
Parameter
phone_setting.contrast <y0000000000xx>.cfg
Description
It configures the contrast of the LCD screen.
For T53W/T53/T43U phones, it configures the LCD's contrast of the IP phone.
For T48S/T48G/T46S/T46G phones, it configures the LCD’s contrast of the connected EXP40 only.
For T29G phones, it configures the LCD’s contrast of the connected EXP20 only.
For T27G phones, it configures the LCD’s contrast of the IP phone and the connected EXP20.
For T40P/T40G/T23P/T23G/T21(P) E2/T19(P) E2/CP920 phones, it configures the LCD’s contrast of
the IP phone.
Note: We recommend that you set the contrast of the LCD screen to 6 as a more comfortable level.
Permitted
Values
Integer from 1 to 10
Default
6
Supported
Devices
All phones except T57W, T54W, T48U, T46U, T42G, T42S, T42U, T41P and T41S
Web UI
Black-and-white Screen Phones:
Settings > Preference > Contrast
Phone UI
Color Screen Phones:
Menu > Basic > Display > Contrast
Black-and-white Screen Phones:
Menu > Settings > Basic Settings > Display > Contrast

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