Module of FreePBX (Framework) :: The framework module is the glue at the middle of FreePBX. Every other module depends on framework. This module also provides a facility to install bug fixes to the framework code that is not otherwise housed in a module.

Module of FreePBX (Voicemail Blasting) :: Creates a group of extensions that calls a group of voicemail boxes and allows you to leave a message for them all at once.

Module of FreePBX (User Management) :: This Module manages all PBX users. It allows an Administrator to create a User Account that can be used by other applications for login or API purposes.

Module of FreePBX (System Firewall) :: Integrated FreePBX Firewall. Uses iptables in v16 and v17, but moving to nftables in v18.

Module of FreePBX (IVR) :: Creates Digital Receptionist (aka Auto-Attendant, aka Interactive Voice Response) menus. These can be used to send callers to different locations (eg, Press 1 for sales) and/or allow direct-dialing of extension numbers.

Module of FreePBX (PM2) :: FreePBX Process Management for NodeJS. Tools for long running processes.

Module of FreePBX (Weak Password Detection) :: This module detects weak SIP secrets and sets security notifications accordingly

Module of FreePBX (WebRTC Phone) :: The WebRTC Module allows an Administrator to enable a "WebRTC phone" that can be attached to a user's extension which they can connect to through FreePBX User Control Panel, this WebRTC phone will then receive phone calls at the same time as the users extension using user and device mode behind the scenes. If …

Module of FreePBX (Missed Call) :: This module generates notifications when a call is missed.

Module of FreePBX (Print Extensions) :: Creates a printable list of extension numbers used throughout the system from all modules that provide an internal callable number