Hello, I have a grandview motorized in-ceiling screen that I am attempting to control via RS232. I have an RJ11 jack wired up like this.

RJ11
1-OW
2-Orange
3-Gw
4-Blue
5-Bw
6-Green

I am attempting to control this via Control4 with an HC800 (I think Control4 only uses pins 2,3, & 5 on their controllers for RS232) and am not sure which pins on the RJ11 are needed. I do not know which ones are t/r and which one is a return/ground/earth whatever you like to call it. Any help would be greatly appreciated.

I found this manual [Link: grandviewscreens.com.au] but can not seem to make heads or tail of it.Thanks