We have a network jack at a remote location to the I.T. dept that is only occasionally used. This jack also occasionally has problems like being drown once, unplugged from the switch accidentally, etc. The problem is that it is never a good situation for us when we plug into the jack and it does not work right now. Currently we have to go out there the day before and test the jack. That is a huge waste of time, most of the time. I tell you that story to ask you this question. Is there a small, inexpensive device that I can plug into the jack and leave that will reply to a ping? I would like to leave the device plugged in and then just send a ping to it to test the line instead of driving all the way out there. Thanks