Quick Reference
dial_timeout
What Dial Timeout Does
The Asterisk-level timeout in seconds for outbound dial attempts. This is separate from call_timeout and controls how long Asterisk waits for a SIP response before abandoning the attempt. Should generally match or be slightly higher than call_timeout.
Recommended Configuration
| Center Size | Recommended Value | Notes |
| --- | --- | --- |
| 10–25 Agents | 20 to 30 seconds | Start conservative, monitor for 48 hours before adjusting |
| 25–100 Agents | 20 to 30 seconds | Scale gradually — larger operations amplify effects of misconfiguration |
| 100–500 Agents | 20 to 30 seconds | Consult ViciStack optimization team for enterprise-scale tuning |
How to Change This Setting
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Go to Admin > Campaigns
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Select campaign
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Find Dial Timeout setting
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Enter integer seconds value
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Should match or slightly exceed call_timeout value
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Submit and verify in Asterisk logs
Common Problems
Mismatched with call_timeout causes inconsistent timeout behavior
Too low causes premature hang-up before carrier routes the call
Too high wastes system resources on zombie channels
ViciStack Module
ViciStack’s Dialer Tuning & Auto-Configuration module automatically monitors and optimizes dial_timeout based on real-time performance data from your operation. Instead of manual tuning, ViciStack continuously analyzes call outcomes, agent performance, and contact rates to recommend and implement optimal values — often catching configuration drift before it affects your numbers.
Frequently Asked Questions
What does dial_timeout do in VICIdial? +
The Asterisk-level timeout in seconds for outbound dial attempts. This is separate from call_timeout and controls how long Asterisk waits for a SIP response before abandoning the attempt. Should generally match or be slightly higher than call_timeout.
What is the recommended value for dial_timeout? +
The recommended range for dial_timeout is 20 to 30 seconds. The out-of-box default is 30. Note that optimal values vary by operation size, campaign type, and carrier — use ViciStack's automated tuning to find your exact optimal configuration.
Can ViciStack automatically optimize dial_timeout for me? +
Yes. ViciStack's Dialer Tuning & Auto-Configuration module monitors dial_timeout continuously and alerts you when the value drifts outside optimal range. On qualifying plans, ViciStack can automatically adjust this setting based on real-time performance data — no manual intervention required.
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