How do I change amd_type in VICIdial?

Navigate to Admin > Campaigns Then: Select campaign Then: Find AMD Type setting Then: Select from: NONE, ASTERISK, MACHINE_ONLY, HUMAN_ONLY, or other available options Then: Configure associated AMD settings after selection Then: Run A/B test to benchmark AMD accuracy for your traffic Then: Submit

VICIdial AMD Type: Complete Optimization Guide

Quick Reference

Setting Name

amd_type

Default Value

NONE

Recommended

ASTERISK for basic AMD, MACHINE_ONLY for aggressive filtering

Impact Level

High

Location in VICIdial

Admin > Campaigns > [Campaign] > AMD Settings

What AMD Type Does

Selects the answering machine detection algorithm. NONE disables AMD entirely. ASTERISK uses Asterisk's built-in AMD application. MACHINE_ONLY routes all AMD-detected calls to voicemail. HUMAN_ONLY only connects AMD-identified human answers. Choice dramatically affects contact rate and agent efficiency.

Recommended Configuration

Center Size	Recommended Value	Notes
10–25 Agents	`ASTERISK for basic AMD, MACHINE_ONLY for aggressive filtering`	Start conservative, monitor for 48 hours before adjusting
25–100 Agents	`ASTERISK for basic AMD, MACHINE_ONLY for aggressive filtering`	Scale gradually — larger operations amplify effects of misconfiguration
100–500 Agents	`ASTERISK for basic AMD, MACHINE_ONLY for aggressive filtering`	Consult ViciStack optimization team for enterprise-scale tuning

  
How to Change This Setting
    1  Navigate to Admin > Campaigns 
  2  Select campaign 
  3  Find AMD Type setting 
  4  Select from: NONE, ASTERISK, MACHINE_ONLY, HUMAN_ONLY, or other available options 
  5  Configure associated AMD settings after selection 
  6  Run A/B test to benchmark AMD accuracy for your traffic 
  7  Submit 
 
  
Common Problems
    NONE means agents manually hear voicemail greetings — wastes 20-40% of talk time
 
  MACHINE_ONLY with poor AMD accuracy drops live contacts to voicemail
 
  ASTERISK default settings need tuning for specific carrier audio profiles
 
 
   
Related Settings
   amd_send_to_vmx AMD Send to Voicemail Extension Campaign  voicemail_message Voicemail Message Campaign  wait_for_silence Wait for Silence Campaign  amd_agent_route AMD Agent Route Campaign  
 
   ViciStack Module
 
How ViciStack Optimizes AMD Type 
 
ViciStack's AMD Optimization module automatically monitors and optimizes amd_type 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 AMD Optimization →
 
  
Frequently Asked Questions
   
What does amd_type do in VICIdial?
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  Selects the answering machine detection algorithm. NONE disables AMD entirely. ASTERISK uses Asterisk's built-in AMD application. MACHINE_ONLY routes all AMD-detected calls to voicemail. HUMAN_ONLY only connects AMD-identified human answers. Choice dramatically affects contact rate and agent efficiency. 
 
  
What is the recommended value for amd_type?
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The recommended range for amd_type is ASTERISK for basic AMD, MACHINE_ONLY for aggressive filtering. The out-of-box default is NONE. 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 amd_type for me?
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Yes. ViciStack's AMD Optimization module monitors amd_type 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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