Yealink SIP-T52S Administrator's Guide

Configuring Security Features
943
Parameters
Permitted Values
Default
Description:
Configures the TLS version the IP phone uses to negotiate with the provisioning server
when using TLS transport method to download the boot file and configuration files from
the provisioning server.
0-use TLS 1.0 to negotiate with the provisioning server
3-use TLS 1.2 to negotiate with the provisioning server, and it is backward compatible
4-use TLS 1.1 to negotiate with the provisioning server
5-use TLS 1.2 to negotiate with the provisioning server
Web User Interface:
None
Phone User Interface:
None
static.security.trust_certificates
0 or 1
1
Description:
Enables or disables the IP phone to only trust the server certificates in the Trusted
Certificates list.
0-Disabled
1-Enabled
If it is set to 0 (Disabled), the IP phone will trust the server no matter whether the
certificate sent by the server is valid or not.
If it is set to 1 (Enabled), the IP phone will authenticate the server certificate based on the
trusted certificates list. Only when the authentication succeeds, the IP phone will trust the
server.
Note: If you change this parameter, the IP phone will reboot to make the change take
effect.
Web User Interface:
Security->Trusted Certificates->Only Accept Trusted Certificates
Phone User Interface:
None
static.security.ca_cert
0, 1 or 2
2
Description:
Configures the type of certificates in the Trusted Certificates list for the IP phone to
authenticate for TLS connection.

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