I have been involved in a discussion in another forum about DMX and a question has come up about how the Lynx dongle works. I believe I have read that pins 1 and 2 are used for data transmission but that there is no common or ground pun. Is that true on the Lynx dongle? If so, what is the reasoning behind it? I though the DMX standard suggested pin 7 or 8 be connected to ground.
I did find this comment in the RJ45 standards section interesting since I believe LOR uses pins 4 and 5:
The avoidance of pins 4 and 5 helps to prevent equipment damage, if the cabling is accidentally plugged into a single-line public switched telephone network phone jack.