DialNexa Limits Reference

Review DialNexa limits for phone numbers, webhooks, retries, call settings, custom functions, CSV uploads, and agent versions.

DialNexa limits and guardrails protect users from invalid configuration. Some limits are visible in the dashboard, such as webhook URL length, retry count, webhook timeout, phone number validation, silence timeout, max call duration, and published-version edit locking.

Limits are not suggestions. They are the product telling you where the edge is before the edge becomes support work.

Dashboard-Visible Limits

These limits are enforced or surfaced in current product flows.

Area	Limit or guardrail
External webhook URL	Must start with https:// and be 150 characters or less.
External webhook retry count	0 to 3.
External webhook timeout	1,000 ms to 60,000 ms.
Phone test recipient	Validated against selected country code and expected digit length.
End call on silence	Dashboard slider uses 15 to 30 seconds.
Maximum call duration	Dashboard slider uses 1 to 90 minutes.
Custom function timeout	Default reducer value is 120000 ms.
Batch and campaign CSV upload	CSV or Excel, maximum 10 MB per file.
Published agent version	Many settings are disabled when viewing a published version.

Limit Questions

Why does the UI reject my webhook URL?

Use HTTPS and keep it within the character limit.

Why can I not edit a setting?

You may be viewing a published version.

Why is my phone number rejected?

Check country and local digit count.

Why is upload rejected?

Files must be CSV or Excel and at most 10 MB. If the file type and size are fine, check the headers against the downloaded template. See Common Upload Errors.

Related Reading

External Webhooks

See webhook validation.

Call Settings

Review timing controls.

Common Upload Errors

Fix CSV issues.