The life of a call begins when an agent navigates to the login screen. Behind the scenes, the script expects two layers of credentials: a Phone Login (to register the SIP or IAX2 device) and a User Login (to access the campaign and lead data). The Handshake

: Manages the multi-stage login process, starting with phone credentials and followed by user/campaign IDs.

To configure AGC in Vicidial using vicidial.php, administrators can follow these steps:

: By copying options-example.php to options.php in the /agc/ directory, admins can toggle features like manual dial previews, hotkeys, and sidebar layouts without touching the core source.

: If an agent's internet connection drops packets, the background loop running inside vicidial.php will fail to update.

Ensure firewalls allow traffic through UDP ports 5060 (SIP) and 10000-20000 (RTP). Best Practices for Optimizing the Agent Screen

For modern deployments, consider migrating to the or the newer VICIdial WebSocket server – but until then, treat your agc processes with the respect they deserve. They work silently, but when they fail, the call center stops.

When things go wrong on the call center floor, agents will frequently complain about "the screen freezing" or "not getting calls." Here are the most common root causes and how to fix them. 1. The White Screen of Death (or Layout Corruption)

The AGC, including vicidial.php and its supporting scripts, has been the subject of several security vulnerabilities over the years. System administrators must take these risks seriously and apply appropriate mitigations.