Dear Friend,
Could you, please,ask your questions in more easy-to-understand way ?
To be honest I can't understand your questions well.
Anyway, here is very clear and very detailed explanation:
1. take your Infinity-Box (only Infinity-Box, nothing else)
2. connect RJ45 cable into left Infinity-Box RJ45
3. use RJ45 pin-1 instead of +battery
4. use pin-8 (or pin-7) instead of -battery
5. use pin-2 and pin-3 as Rx/Tx.
Some additinal information to avoid future questions:
1. read this:
http://forum.gsmhosting.com/vbb/showthread.php?t=386780 and you will see pictures how to build cable for S404 (this link can be found in FAQ, but to make everything so easy as possible I don't suggest you to read FAQ as it's just a waste of time but I post direct link here)
2. if you have phone with battery you can use battery and connect from box only Rx/Tx/Gnd wires (accoring to previous link). In most cases it's the easiest way to amke something instead of try to connect 4 wires instead of 3, it's safest way and also pictures attached by above link so I hope that explanation (3 wires + battery) is quite clear and easy to understand).
Please, confirm, is it enough clear explanation ?