Yealink SIP-T52S Administrator's Guide

Troubleshooting
993
 Ensure that the power is on and the network is available in the process of upgrading.
 Ensure that the web browser is not closed or refreshed when upgrading firmware via web
user interface.
How can I verify the firmware generation and version of the phone?
Press the OK/√ key when the IP phone is idle to check the firmware version. For example:
28.81.0.20.
Item
Description
1
28
Firmware ID.
The firmware ID for each IP phone model is:
 70: SIP-T54S/T52S
 35: SIP-T48G
 28: SIP-T46G
 66: SIP-T48S/T46S/T42S/T41S
 29: SIP-T42G
 36: SIP-T41P
 54: SIP-T40P
 76: SIP-T40G
 46: SIP-T29G
 45: SIP-T27P
 69: SIP-T27G
 44: SIP-T23P/G
 52: SIP-T21(P) E2
 53: SIP-T19(P) E2
 37: CP860
 78: CP920
2
81
Firmware generation.
Note: The larger it is, the newer the firmware
generation is.
3
0
A fixed number.

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