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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3. Click Upgrade.
A dialog box pops up to prompt “Firmware of the SIP Phone will be updated. It will take 5
minutes to complete. Please don't power off!”.
4. Click OK to confirm the upgrade.
Note
Keeping User Personalized Settings after Auto Provisioning
Generally, the administrator deploys phones in batch and timely maintains company phones via
auto provisioning, yet some users would like to keep the personalized settings (e.g., ring tones,
wallpaper, dial plan, time format or DSS keys), after auto provisioning. These specific scenarios
are applicable to Yealink IP phones. The following demonstrated specific scenarios are taking
SIP-T46G IP phones as example for reference.
Note
Do not close and refresh the browser when the IP phone is upgrading firmware via web user
interface.
Yealink IP phones support FTP, TFTP, HTTP and HTTPS protocols for uploading the <MAC>-
local.cfg file. This section takes the TFTP protocol as an example. Before performing the
following, make sure the provisioning server supports uploading.
If you are using the HTTP/HTTPS server, you can specify the way the IP phone uploads the
<MAC>-local.cfg file to the provisioning server. It is determined by the value of the parameter
“static.auto_provision.custom.upload_method”.

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