Change the TFTP of your IP Phone and reset it.loads file that you have on the TFTP folder and copy it to the. Modify in Notepad++ the desired phone model's firmware name so it will push the phone to upgrade to the chosen firmware.For this you can use the Windows built in TFTP client. This will allow to upgrade multiple phones without having to download each phone configuration file to the external TFTP server. The XMLDefault.cnf file will be used by the phone when is not able to find it's configuration file to identify the firmware version it needs to uprade to. Get the XMLDefault.cnf file from the TFTP of CUCM and save it in the same TFTP folder as the other files.zip file into the TFTP folder you created on the previous step as the root for the TFTP server. Create a folder on your desktop and put it as the root directory on the TFTP32.The zip file contains all the files required for the phone to be able to upgrade it's firmware. zip file of the firmware you want to use in this case we'll use a SCCP version for the 8-5-2. This is usefull on situations like firmware upgrade over high delay WAN links that take a long time or can cause timeouts. This document describes the process to upgrade Unified IP Phones firware by an the means of an external TFTP server.
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