By default, firmware is provisioned in NDP using the oldest model firmware in the dropdown list. You can see the firmware by clicking on the 'Line' of a Phone that is already configured.Here you can change the firmware; one phone at a time.Deploying firmware for all phones on a domainAPP_FILE_PATH' is telling the phone where to get its firmware. If you wanted to configure an entire domain to use a specific firmware version you could use the following domain level override to 5.7.0 firmware (for example).APP_FILE_PATH="../frm/uc_5.7.0_split/sip.ld"You can see what is available for any Polycom model by viewing the Firmware dropdown list in NDP (as shown in the screenshot above) and replacing the text in the override.APP_FILE_PATH="../frm/uc_5.8.0_split/sip.ld"Using your own Poly hosted firmwareYou can use APP_FILE_PATH to specify the location of other Polycom Firmware. For example, if you host your own 'split' firmware in a file folder on your web server you could use:APP_FILE_PATH="www.exampleserver.com/uc_6.1.0_split/sip.ld"Skipping firmware changesTo skip, just direct the Polycom phone to look towards 0.0.0.0 for firmware.APP_FILE_PATH="0.0.0.0"