DialNexa Call Settings

Configure DialNexa call duration, silence, voicemail, ambient sound, and route settings for a published voice AI agent.

DialNexa call settings control phone-call behavior around voicemail, silence, ambient noise, and maximum duration. These settings decide what happens when nobody answers, the caller goes quiet, or the conversation runs too long.

Call settings are guardrails. If they are too loose, calls wander. If they are too tight, callers get cut off mid-thought.

Before You Begin

Use a tested draft or published version and decide the acceptable call duration, silence behavior, voicemail outcome, and route-specific restrictions for the use case.

Call Controls Users See

Control	Behavior	Provider effect
Voicemail Detection	Detects voicemail and lets the user choose whether to hang up or leave a message.	Most relevant for outbound phone calls through Plivo or SIP routes.
Voicemail Message	Message content used when voicemail detection is set to leave a message. It can include dynamic variables.	Uses the selected voice and voice model, so pronunciation still matters.
Ambient Noise	Controls whether ambient sound is used in the call experience.	Test on actual phone calls, not only web calls.
End Call On Silence	Ends the call after a silence window. The UI guards against values too close to reminder timing.	Short timeouts can conflict with patient transcriber settings.
Maximum Call Duration	Caps the total call length. The UI expresses this in minutes and sends seconds to the API.	Longer calls increase cost and can expose more provider latency.

Call Limit Rules

The dashboard and API validate call limits before saving an agent version.

Setting	Rule
End Call On Silence	Must be 15 to 30 seconds. When reminder timing is configured, the silence timeout must be more than 5 seconds above the reminder interval.
Maximum Call Duration for cascaded agents	Must be at least 60 seconds and no more than 5,400 seconds.
Maximum Call Duration for Speech to Speech agents	Must be at least 60 seconds and no more than 3,600 seconds.
Voicemail Message	Can use {{variable}} syntax and must be valid Handlebars template text.

Set Call Limits Intentionally

1. Decide voicemail behavior

   For campaigns, choose whether voicemail should end the call or receive a short message.

2. Write a voicemail-safe message

   Keep it short, include only safe dynamic variables, and test how the selected voice reads it.

3. Keep silence humane

   Use enough silence time for real callers to think, find information, or respond.

4. Set max duration by use case

   A reminder call and a support intake call should not have the same limit by accident.

5. Test edge cases

   Let the test caller go quiet, hit voicemail, and talk longer than expected.

Call Settings And Voice AI Providers

If you see	Check
Caller is cut off while thinking	End Call On Silence, Response Eagerness, and transcriber endpoint timing.
Voicemail sounds strange	Voice, voice model, speed, and dynamic variables in the voicemail message.
Calls run too long	Maximum Call Duration, prompt close conditions, End Call function, and transfer behavior.
Inbound and outbound behave differently	Phone number direction assignment, Plivo or SIP path, and voicemail behavior.

Call Setting Failure Modes

Voicemail message has missing variables

Add defaults for any {{variable}} used in the voicemail message.

Silence timeout fires too soon

Increase the timeout or adjust reminder timing. People pause, look up details, and ask someone nearby.

Long calls cost more than expected

Review maximum duration, transfer handling, campaign retry settings, and whether the prompt ends calls clearly.

Controls are disabled

You may be viewing a published version. Create or select an editable draft for changes.

Verify Call Settings

Test silence, maximum duration, voicemail, and any ambient sound or route behavior you changed. Confirm the caller experience and final Call History status match the configured rule.

Related Reading

Voicemail Detection

Understand voicemail behavior.

Speech Settings

Tune Response Eagerness and Denoising Mode.

Phone Numbers

Understand route assignments.

Billing And Wallet

Plan for call duration.

Call Settings And Webhooks Video

Watch the call behavior and webhook setup walkthrough.