DTMF Masking - stop cardholder data from being exposed

Dual Tone, Multi-Frequency (DTMF), is the technical term for the unique tones made by your phone when digits are pressed.

DTMF suppression and/or masking simply replaces the audio tone value with a single mono-tone preventing downstream systems from being exposed to this sensitive data. This technology is included in all of Eckoh's phone payment products.

CallGuard gives you the choice of using DTMF masking or tokenization to stop cardholder data from being exposed to the contact center environment. Both these methods greatly reduce the number of PCI DSS controls an organization needs to apply and the Payment Card Industry Security Standards Council (PCI SSC) recognizes them as comprehensive solutions for securing cardholder data and reducing the scope of the contact center for compliance purposes.

See DTMF masking in action

Book a personalized demo and we'll show you how Eckoh removes card data from your contact center environment, without disrupting the agent or the call.

The benefits of compliance

PCI
PCI DSS Level 1 compliant payments
Sales Conversation
Caller and agent remain in constant contact
Heart-Conversation
Better customer experiences
Lower
Reduce card entry errors and AHT scores
Record
Keep your existing systems and call recording
Pause
Agents do not have to pause or resume the call

How DTMF masking works

Customer Card Entry
Card Entry

Customers enter card details securely using their phone keypad during a live agent conversation.

Data Interception
Interception

DTMF tones are captured before reaching agents, recordings, or contact center systems.

DTMF Masking
Masking

Sensitive keypad tones are replaced with flat tones, preventing card data exposure or decoding.

Secured Payment
Secured by Eckoh

Payment data is sent safely for authorization and is removed from PCI DSS compliance scope.

See it in under 2 minutes

Watch how Eckoh keeps payments secure across any contact center and why we are the right choice for you.
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Why Eckoh

Protecting customer data everywhere

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Trusted Globally

Global Enterprise customers:

200+

Securing at Scale

Over $1billion Secured Annually:

1bn+

Transforming PCI DSS

Years PCI DSS Level 1 Certified:

16Years

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Trusted by world leading brands

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Security You Can Trust

Eckoh’s security accreditations demonstrate a long-standing commitment to protecting customer data, maintaining regulatory compliance, and delivering enterprise-grade security.

  • PCI DSS Level 1 certified since 2009.
  • SOC 2 Type 2 cloud security controls.
  • Cyber Essentials and Cyber Essenials Plus.
  • Visa validated service provider.
  • Mastercard SDP registered provider.
  • Government-approved.
  • GDPR compliant and HIPAA-aligned.

Security starts with Eckoh.

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