DialNexa Fallback Settings

Understand DialNexa fallback settings for default dynamic variables, missing launch values, transfer destinations, and safe variable defaults.

DialNexa fallback settings let users define default dynamic variable values for an agent version. These defaults are used when a prompt, welcome message, voicemail message, batch file, workflow lead, or API call references a variable but no call-specific value is supplied.

A default value should be safe to say out loud. If you would not want the caller to hear it, do not use it as a fallback.

What The Panel Does

The builder detects placeholders such as {{first_name}} in prompt-related text and lists them as default dynamic variables. Users can enter fallback values, save them to the agent version, and use those values when the launch surface does not provide a replacement.

Default Variable Sources

Fallback settings protect multiple launch paths.

Variable appears in	Why fallback matters
Prompt text	Prevents awkward missing personalization during the main conversation.
Welcome message	Protects the first spoken sentence.
Voicemail message	Prevents voicemail from containing unresolved placeholders.
Call transfer path	Transfer destinations may require a formatted default value.
Batch or workflow launch	Protects against incomplete CSV rows or lead variables.

Transfer Destination Defaults

Transfer settings deserve extra validation.

Pipe-separated numbers

Use a format such as [phone]|[phone] when a transfer variable expects multiple destinations.

Representative routing

Check that each destination belongs to the intended handoff team.

Published version behavior

Fallback changes must be on the version that traffic actually uses.

Call History proof

Review transfer results after testing.

Fallback Mistakes

Leaving an empty value

The dashboard can block saving when detected variables have empty defaults.

Using sample data in production

Replace examples with safe generic fallback values.

Assuming CSV overrides always exist

Bad recipient files happen. Defaults are insurance.

Forgetting voicemail variables

The voicemail message is scanned too. Add defaults for those placeholders.

Related Reading

Dynamic Variables

Understand placeholders.

Default Variables

See the data concept.

Call Transfer

Configure transfer destinations.