Yealink SIP-T54S Administrator's Manual page 163

overwrite_mode = 1
Learn the following:
The line beginning with "#" is considered to be a comment.

The file header "#!version:1.0.0.1" is not a comment and must be placed in the first line. It

cannot be edited or deleted.
Each "include" statement can reference a configuration file. The referenced configuration

file format must be *.cfg.
The contents in the angle brackets or double quotation marks represent the download

paths of the referenced configuration files (e.g., http://10.2.5.206/configure/account.cfg).
The download path must point to a specific CFG file. The sip.cfg and account.cfg are the
specified configuration files to be downloaded during auto provisioning.
The CFG files are downloaded in the order listed (top to bottom).

The IP phone downloads the boot file first, and then downloads the sip.cfg and account.cfg
configuration files from the "configure" directory on the provisioning server in sequence. The
parameters in the new downloaded configuration files will override the duplicate parameters in
files downloaded earlier.
"overwrite_mode = 1" means overwrite mode is enabled. The overwrite mode will be

applied to the configuration files specified to download. If the value of a parameter in
configuration files is left blank or a parameter in configuration files is deleted or
commented out, the factory default value can take effect immediately after auto
provisioning.
Overwrite mode only affects the non-static settings configured using configuration files.
Note
If you do not use the boot file for auto provisioning, overwrite mode is disabled by default and
you are not allowed to enable it.
For more information on how to customize boot file, refer to
Provisioning Guide_V81
Common Boot File
Common boot file, named y000000000000.boot, is effectual for all phones.
MAC-Oriented Boot File
MAC-Oriented boot file, named <MAC>.boot. It will only be effectual for a specific IP phone.
The MAC-Oriented boot file should be created using template boot file in advance.
The MAC-Oriented boot file is named after the MAC address of the IP phone. MAC address, a
unique 12-digit serial number assigned to each phone, can be obtained from the bar code on
the back of the IP phone. For example, if the MAC address of an IP phone is 00156574B150, the
name of the MAC-Oriented boot file is 00156574b150.boot (case-sensitive).
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Setting Up Your System
Yealink SIP IP Phones Auto
137