> > You will need to terminate the coax. > > (terminator)---------------<tap>------. . . > ----<tap>----------------(terminator).
He said he has connected a 47 Ohm resistor at each end of the coax. That's close enough to the correct 50Ohm terminal to work. > Anyway, you need to terminate the line or your going to have so many issues > you may not even get a packet to make it from one end of the line to the > other. Correct. You won't. No matter how short the coax is. You will get collisions. The reason is that the transmitter in a coax MAU is a current source which effectively develops a voltage across the terminators. The receiver is a voltage detector. A collision is sensed by the MAU if it sees more voltage across the coax than it should. This (on a correctly terminated cable) means that 2 transmitters are putting current into the cable/terminators at the same time. But if the termination resistors are too high or missing (even if only one is missing) then a single transmitter's current will develop enough voltage across the coax to be detected as a collision. -tony
