: Adds support for AES 256 contact encryption and SRTP GCM 256 algorithm.
Log into the web user interface and export your current configuration file ( .cfg ) so you can restore your settings if the phone resets. yealink t53w firmware upd
He copied the firmware files into the root directory of his TFTP server. He edited the configuration file ( y000000000067.cfg ) to ensure the phones would know to look for the new firmware upon reboot. : Adds support for AES 256 contact encryption
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