3CX DTMF Capture Panel

I need a custom panel for my 3CX phone system that listens for DTMF tones during live calls, captures every numerical input the caller enters, and turns those digits into real-time reports I can view instantly in a browser.

The key for me is accuracy and speed: as soon as the caller finishes entering a number, the panel should refresh the on-screen report so supervisors can act on the information while the call is still active. I am not looking to store the data long-term or trigger downstream workflows—just fast, on-the-spot visibility of what the caller keyed in.

Because everything must sit cleanly inside (or alongside) 3CX, please base your solution on technology that plays well with the 3CX Call Control API, SIP messages, or any proven method you have used before for intercepting DTMF within 3CX. A compact web interface or an add-in for the 3CX Management Console would both work; I am open to whichever path lets us deploy quickly and keep maintenance light.

Deliverables
• Fully functional DTMF capture module integrated with my existing 3CX installation
• Live reporting view that auto-updates as digits arrive
• Brief setup guide so I can replicate the install on other 3CX instances

If you have previous experience tapping into 3CX events or decoding in-band / RFC 2833 DTMF, that will help us move even faster. Let me know the approach you propose and the turnaround you can commit to.