Customizing Nortel Millenium demo firmware

This service lets you customize the demo firmware for MTR1 boards, including:
 ■ advert prompts
 ■ speed dials
 ■ rates and a lot of other settings

  At the end you can downlaod a customized binary file to burn the EPROM chip or order it online. Then replace the chip on your payphone's mainboard and follow init procedure.

Please remember:
 ■ Demo firmware only works with MTR 1 boards. Check the manual for pictures.
 ■ Service is free but please limit EPROM downloads to two each day
 ■ I put a lot of effort developing this tool.
 ■ You can buy me a coffee ($3 - $5) if you find this service useful
 ■ Programmed chips ready to be installed available on ebay for $25.
 ■ Remember your code when done.

(I have a code to restore previous setup: )

Program version: 1.1    08/08/2025    (c) payphones.telesfor.org

Special thanks to Michel Forget for a great contribution in reverse-engineering the demo firmware.

Use at your own responsibility. We provide it as-is with no guarantees.