The phrase is a fossil of digital desire – the longing for hidden potential in mass-produced hardware, and the belief that a mysterious file can unlock it.

The most effective way to ensure "extra quality"—including improved echo cancellation and noise suppression—is to use the official management software. Plantronics is now part of .

Some Extra Quality builds disable the analog PSTN (Plain Old Telephone Service) circuit to free up RAM for the high-bitrate codec. If you need the RJ-11 phone jack, revert to stock firmware v.201.

The software will automatically detect your Calisto P610. If an update is available, it will prompt you with an "Update" button.