VICIdial Answering Machine Detection vs AI-Based AMD: Which Is Better?

Answering machine detection is the single most impactful technology in an outbound call center's stack. A good AMD system connects your agents to live humans and filters out voicemail boxes. A bad one either drops live calls (false positives) or wastes agent time on answering machines (false negatives). Either way, you lose money. VICIdial ships with traditional CPD-based (Call Progress Detection) AMD built into Asterisk. It has been the standard for over a decade. In the last few years, AI-based AMD systems have emerged that use machine learning models to analyze audio in real time. These systems promise significantly higher accuracy -- but they come with tradeoffs in latency, cost, and integration complexity. This article provides a detailed technical comparison. We will examine how each approach works at the signal-processing level, compare real-world accuracy numbers, analyze latency impacts on agent utilization, break down the cost math, and help you decide which approach fits you