What is DTMF (Dual-Tone Multi-Frequency)?
DTMF (Dual-Tone Multi-Frequency) is the tone signalling produced when you press phone keypad digits, used for menus and for entering card numbers by phone.
How does DTMF (Dual-Tone Multi-Frequency) relate to Silux Call?
Silux Call’s PCI module masks DTMF during card entry so digits never enter recordings — dropping you from PCI SAQ-D to SAQ-A scope.
Also searched as: touch tones, keypad tones, dtmf redaction.
See it in Silux Call.
UK business VoIP with a 14-day free trial. UK GBP, no contract.
Start 14-day free trial — no cardRelated terms
Go deeper
- Business VoIP (UK)solution
- Hosted PBX (UK)solution
- UK PSTN switch-off 2027: what every small business must doguide
- How to port your UK phone number to VoIP (PAC and STAC explained)guide
- Silux Call vs bOnlinealternative
- Silux Call vs Yay.comalternative
- Silux Call for Estate agentsindustry
- Silux Call for Legal practicesindustry