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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2. Click Browse to locate the custom factory configuration file from your local system.
3. Click Import.
When the custom factory configuration file is imported successfully, you can reset the IP phone
to custom factory configurations. For more information on how to reset to factory
configuration via web user interface, refer to How to reset the IP phone to default factory
configurations? on page 995.
You can delete the user-defined factory configurations via web user interface.
To delete the custom factory configuration files via web user interface:
1. Click on Settings->Configuration.
2. Click Del in the Import Factory Config field.
The web user interface prompts the message “Are you sure delete user-defined factory
configuration?”.
3. Click OK to delete the custom factory configuration files.
The imported custom factory file will be deleted. The IP phone will be reset to default factory
configurations after resetting.
Rebooting Issues
How to reboot the IP phone remotely?
IP phones support remote reboot by a SIP NOTIFY message with “Event: check-sync” header.
Whether the IP phone reboots or not depends on the value of the parameter
“sip.notify_reboot_enable”. If the value is set to 1, or the value is set to 0 and the header of the
SIP NOTIFY message contains an additional string “reboot=true”, the IP phone will reboot
immediately.

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