LCR and Billing applications for FusionPBX are what is commonly known as 'in-app'; these applications allow you to extend the functionality of a standard installation in an easy and fast way. Among the most outstanding advantages are:
Simplified voice over ip flow: Unlike other billing applications, you do not need to install another instance of a switch (Asterisk or FreeSWITCH). The outgoing and incoming flow becomes simple, an additional point of failure is removed and it allows direct interaction with SIP extensions.
Billing of additional elements: Being an internal application of FusionPBX, you can deduct from the credit some elements, for example a fee for existing extension or an assigned phone number.
Integration with FusionPBX portal: Use the information from other installed applications, for example the contacts application.