DTMF Support for Voice AI Testing
Dietmar Meister called us with a problem. His team had built a voice agent for a banking client—account lookups, balance checks, transfer requests. The voice part worked. But when customers needed to enter their PIN or account number via keypad, they were flying blind. Every DTMF test was manual. Someone actually dialing in, pressing buttons, checking if it worked.
"I spend two hours a day testing keypad flows," he told us. "There has to be a better way."
Now there is. Hamming supports DTMF testing, so you can automate the flows that used to require someone physically pressing buttons.
Quick filter: If your flow involves PINs, account numbers, or IVR menus, you need DTMF tests or you’re guessing.
What's New
- Complete numeric keypad simulation (0-9, *, #)
- Multi-digit sequence testing
- Combined voice and DTMF interaction testing
- Automated timing validation
- IVR menu navigation testing
| Capability | Question it answers | Why it matters |
|---|---|---|
| Keypad simulation | Can users complete menu flows? | Ensures IVR navigation works |
| Multi-digit sequences | Are IDs and PINs captured correctly? | Prevents data entry errors |
| Voice + DTMF | Do mixed flows behave as expected? | Mirrors real customer behavior |
| Timing validation | Are tones recognized at the right time? | Avoids missed or duplicate inputs |
Why It Matters
DTMF testing is crucial for voice AI systems that handle customer service, automated phone systems, and interactive voice response (IVR) applications. With automated DTMF testing, you can:
- Ensure Reliability: Validate proper handling of keypad inputs across all scenarios
- Save Time: Eliminate manual testing and reduce QA effort
- Improve Coverage: Test complex interaction patterns systematically
- Maintain Quality: Ensure consistent handling of DTMF inputs
This comprehensive approach enables teams to build more reliable voice AI systems while significantly reducing testing overhead.
How to Use
To start using DTMF testing:
- Access your Hamming AI dashboard
- Configure DTMF test scenarios
- Define input sequences
- Run automated tests
Use Cases
Menu Navigation Testing
- Validate numeric menu selections
- Test option response accuracy
- Verify navigation paths
- Ensure proper error handling
Data Entry Validation
- Test phone number inputs
- Validate PIN code entry
- Verify account number processing
- Test form completion flows
Mixed Interaction Testing
- Combine voice and DTMF inputs
- Test complex workflows
- Validate multi-step processes
- Test fallback scenarios
Looking Forward
This DTMF support feature represents our commitment to comprehensive voice AI testing. Special thanks to Dietmar Meister for the inspiration behind it.
Contact our team to learn more about how DTMF testing can enhance your voice AI development process.
