[QUOTE]Originally posted by SergioRM
[B]Hi Steve,
But I still want to know if we can make a repeater connecting "back to back".

Yes you can connect two 75176 back to back for a level booster if you are only sending data in one direction. If you are doing two wire duplex then you would have to have some kind of switch in your repeater to detect the source of the data and switch the direction of the repeater.