force_dial_prefix

What Force Dial Prefix Does

Forces a specific prefix to be prepended to every dial string regardless of other settings. Unlike dial_prefix which can be overridden, this setting cannot be bypassed. Used when a consistent gateway prefix is required at the Asterisk level.

Recommended Configuration

| Center Size | Recommended Value | Notes |

| --- | --- | --- |

| 10–25 Agents | Use only when specific prefix required for all calls | Start conservative, monitor for 48 hours before adjusting |

| 25–100 Agents | Use only when specific prefix required for all calls | Scale gradually — larger operations amplify effects of misconfiguration |

| 100–500 Agents | Use only when specific prefix required for all calls | Consult ViciStack optimization team for enterprise-scale tuning |

How to Change This Setting

• Navigate to Admin > Campaigns

• Select campaign

• Find Force Dial Prefix field

• Enter the required prefix

• Verify no double-prefix occurs with dial_prefix setting

• Test with a known number

• Submit

Common Problems

Conflicts with dial_prefix causing double-prefix and dial failure

Applied to all calls including transfers which may not need the prefix

Changing requires careful testing to avoid breaking all outbound calls

ViciStack Module

ViciStack’s Dialer Tuning & Auto-Configuration module automatically monitors and optimizes force_dial_prefix 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.