Yealink SIP-T52S Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones
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5. Select the desired value from the pull-down list of Display Text Message Popup.
6. Click Confirm to accept the change.
Contrast
Contrast determines the readability of the texts displayed on the LCD screen. Adjusting the
contrast to a comfortable level can optimize the screen viewing experience. When configured
properly, contrast allows users to read the LCD’s display with minimal eyestrain. You can
configure the LCD’s contrast of SIP-T40P/G, SIP-T27P/G, SIP-T23P/G, SIP-T21(P) E2, SIP-T19(P)
E2, CP860 and CP920 IP phones, EXP20 (connected to SIP-T29G/T27P/T27G IP phones) and
EXP40 (connected to SIP-T48G/T48S/T46G/T46S IP phones). Make sure the expansion module
has been connected to the IP phone before adjustment.
It is not applicable to SIP-T54S/T52S/T42G/T42S/T41P/T41S IP phones.
Procedure
Contrast can be configured using the following methods.
Central Provisioning
(Configuration File)
<y0000000000xx>.cfg
Configure the contrast of the LCD
screen.
Parameter:
phone_setting.contrast
Web User Interface
Configure the contrast of the LCD
screen.
Navigate to:
http://<phoneIPAddress>/servlet?

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