VICIdial Start Call URL: Complete Optimization Guide

Quick Reference

Setting Name

start_call_url

Default Value

Recommended

Configure for CRM integration

Impact Level

Medium

Location in VICIdial

Admin > Campaigns > [Campaign] > URL Settings

What Start Call URL Does

A URL that VICIdial calls via HTTP GET when a call connects to an agent. Used to trigger CRM screen pops, log call events, or integrate with external systems. Supports VICIdial variable substitution to pass lead data, call ID, and agent information to the target URL.

Center Size Recommended Value Notes
10–25 Agents Configure for CRM integration Start conservative, monitor for 48 hours before adjusting
25–100 Agents Configure for CRM integration Scale gradually — larger operations amplify effects of misconfiguration
100–500 Agents Configure for CRM integration Consult ViciStack optimization team for enterprise-scale tuning

How to Change This Setting

  1. 1 Navigate to Admin > Campaigns
  2. 2 Select campaign
  3. 3 Find Start Call URL field
  4. 4 Enter target URL with VICIdial variable placeholders (e.g., --A--lead_id--B--)
  5. 5 Test URL manually with sample values first
  6. 6 Verify target URL responds quickly (under 500ms) to avoid call delay
  7. 7 Submit

Common Problems

Slow external URL causes agent screen pop delay of several seconds

URL errors don't prevent call delivery but cause silent CRM sync failures

Variable substitution syntax must match VICIdial documentation exactly

campaign_recording Campaign Recording Campaign lead_filter Lead Filter Campaign scheduled_callbacks Scheduled Callbacks Campaign

ViciStack Module

How ViciStack Optimizes Start Call URL

ViciStack's List Management & Optimization module automatically monitors and optimizes start_call_url 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.

Learn About List Management & Optimization →

Frequently Asked Questions

What does start_call_url do in VICIdial? +
A URL that VICIdial calls via HTTP GET when a call connects to an agent. Used to trigger CRM screen pops, log call events, or integrate with external systems. Supports VICIdial variable substitution to pass lead data, call ID, and agent information to the target URL.
What is the recommended value for start_call_url? +
The recommended range for start_call_url is Configure for CRM integration. The out-of-box default is . 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 start_call_url for me? +
Yes. ViciStack's List Management & Optimization module monitors start_call_url 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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