Likely indicates a functional update to an existing module or component.
Using the wrong version of a "rewrite" tool or an incompatible firmware file can damage your hardware. Always verify the hardware version of your ONT (found on the bottom sticker) before proceeding. rewritev300r13c10spc800.exe
Follow the CLI (Command Line Interface) or GUI instructions to specify the target device IP port or COM port channel. Likely indicates a functional update to an existing