PPM Configuration in VESC Tool

Hello,

I am planning on building my first project with VESC. I come from a background of plane/boat/racing quad ESCs, which generally accept either PWM or 4-12 channel PPM. Because I would like to use my current 4-12 channel PPM RC Transmitter for my project, I want to confirm I can use this transmitter/controller before purchasing. I can configure whatever frame size/pulse length is needed, but I cant go below for channels. 

I have read: https://vesc-project.com/node/939 which documents how to configure the VESC for "Conventional RC Receivers". I am curious what conventional means in this case. I'm going to be setting up the vesc tool and playing with it a bit, maybe I can answer this myself. But I was wondering if anyone else knew this? Or where I could read about this?

Thanks,

JHS