Yealink SIP-T48G Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
54
auto_provision.server.url = tftp://192.168.1.211/ProvisioningDir_new
Note
4. 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-T2_Series_T19(P)
E2_T4_Series_CP860_IP_Phones_Auto_Provisioning_Guide .
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 and 001565221229.cfg
files in sequence from the new directory “ProvisioningDir_new” of the provisioning
server. As no 001565221229-local.cfg file exists on the IP phone, the IP phone
automatically generates a 001565221229-local.cfg file which saves the personalized
settings of the old firmware.
The IP phone updates configurations in the downloaded configuration files orderly
to the IP phone system. As the value of the parameter
“auto_provision.custom.protect” is set to 1, the phone also updates the
configurations stored in the 001565221229-local.cfg file on the phone. As a result,
the personalized settings of the old firmware are remained after upgrade and auto
provisioning.
Note
The administrator wishes to upgrade firmware from the old version to the latest version.
Meanwhile, keep user personalized settings after auto provisioning and upgrade.
Scenario Conditions:

SIP-T23G IP phone current firmware version: 44.80.0.1. This firmware supports
keeping personalized settings and generating a <MAC>-local.cfg file.

SIP-T23G IP phone target firmware version: 44.80.0.60. This firmware supports
keeping personalized settings and generating a <MAC>-local.cfg file.
If your IP phone is running firmware version prior to 61, the IP phone can only recognize
the old (M1) configuration file for auto provisioning, so the blank configuration file
created above uses the M1 template.
If a configuration item is both in the downloaded MAC-local.cfg file and Common CFG
file/ MAC-Oriented CFG file, setting of the configuration item in the MAC-local CFG file
will be written and saved to the IP phone system.

Yealink SIP-T48G Specifications

General

Expansion module support	Yes
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Volume control	-
Display diagonal	7 \
Display resolution	800 x 480 pixels
Lines quantity	- lines
Phonebook capacity	1000 entries
Number of VoIP accounts	6
AC adapter input voltage	100 - 240 V
Number of handles included	1 pc(s)

Weight and Dimensions

Width	266 mm
Height	185 mm