Yealink SIP-T52S Administrator's Guide

Configuring Basic Features
181
p=settings-preference&q=load
Phone User Interface
Configure the contrast of the LCD
screen.
Details of the Configuration Parameter:
Parameter
Permitted Values
Default
phone_setting.contrast
Integer from 1 to 10
6
Description:
Configures the contrast of the LCD screen.
For T48G/T48S/T46G/T46S IP phones, it configures the LCD’s contrast of the connected
EXP40 only.
For T29G IP phones, it configures the LCD’s contrast of the connected EXP20 only.
For T27P/G IP 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/CP860/CP920 IP 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. It is not applicable to SIP-T54S/T52S/T42G/T42S/T41P/T41S IP phones.
Web User Interface:
For SIP-T48G/T48S/T46G/T46S/T29G:
None
For SIP-T40P/T40G/T27P/T27G/T23P/T23G/T21(P) E2/T19(P) E2/CP860/CP920:
Settings->Preference->Contrast
Phone User Interface:
Menu->Basic->Display->Contrast
To configure contrast via web user interface (take SIP-T23G IP phones for example):
1. Click on Settings->Preference.

Yealink SIP-T52S Specifications

General

Touchscreen	-
Display diagonal	2.8 \
Backlight display	Yes
Display resolution	320 x 240 pixels
Lines quantity	16 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	12
AC adapter input voltage	100 - 240 V
Bluetooth version	2.1+EDR
Security algorithms	802.1x RADIUS, HTTPS, MD5
Ethernet LAN interface type	Gigabit Ethernet
USB 2.0 ports quantity	1
Ethernet LAN (RJ-45) ports	2
Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Voice codecs	G.722, G.723, G.723.1, G.726, OPUS, iLBC
Volume control	Digital
Operating temperature (T-T)	-10 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Cables included	LAN (RJ-45)
Number of handles included	1 pc(s)
Front camera	No
Operating system installed	Linux

Weight and Dimensions

Depth	212 mm
Width	211.6 mm
Height	166.8 mm