Yealink SIP-T52S Administrator's Guide

Configuring Basic Features
161
Scenario A Keep user personalized configuration settings
The administrator wishes to upgrade firmware from the old version to the latest version.
Meanwhile, keep user personalized settings after auto provisioning and upgrade.
For more information on the flowchart of keep user personalized configuration settings, refer
to Appendix E: Auto Provisioning Flowchart (Keep User Personalized Configuration Settings) on
page 1036.
Scenario Conditions:

SIP-T46G IP phone current firmware version: 28.81.0.15. This firmware supports keeping
personalized settings and generating a <MAC>-local.cfg file.

SIP-T46G IP phone target firmware version: 28.81.0.40. This firmware supports keeping
personalized settings and generating a <MAC>-local.cfg file.

SIP-T46G IP phone MAC: 001565770984

Provisioning server URL: tftp://192.168.1.211

Place the target firmware to the root directory of the provisioning server.
The old firmware version supports keeping personalized settings and generating a <MAC>-
local.cfg file. To keep user personalized settings after auto provisioning and upgrade, you need
to configure the value of the parameter “static.auto_provision.custom.protect” to 1 in the
configuration file.
Do one of the following operations:
Scenario Operations I:
1. Edit the following parameters in the y000000000028.cfg file you want the IP phone to
download:
static.auto_provision.custom.protect = 1
static.auto_provision.custom.sync = 1
static.firmware.url = tftp://192.168.1.211/28.81.0.15.rom
2. Trigger the IP phone to perform the auto provisioning process. For more information on
how to trigger auto provisioning process, refer to Triggering the IP Phone to Perform the
Auto Provisioning section in Yealink SIP IP Phones Auto Provisioning Guide_V81 .
During auto provisioning, the IP phone first downloads the y000000000028.cfg file, and
then downloads firmware from the root directory of the provisioning server.
The IP phone reboots to complete firmware upgrade, and then starts auto provisioning process
again which is triggered by phone reboot (the power on mode is enabled by default). It
downloads the y000000000028.cfg, 001565770984.cfg and the 001565770984-local.cfg file in
sequence from the provisioning server, and then updates configurations in these downloaded
configuration files orderly to the IP phone system. The IP phone starts up successfully, and the
personalized settings in the 001565770984-local.cfg file are kept after auto provisioning.
When a user customizes feature configurations via web/phone user interface, the IP phone will

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