You can NOT just run a standard ether cable to your comp
. I know that because I tried. However, this is just a basic rule of networking. You would have to use a crossover
patch cable or run it to a router
then to the comp
. Then from the hub
you could also run it to the dimmers, if ETC
, and even to a wireless access point
. Then you can hook up nodes too, wired or if you have the wireless stuff, wireless using WiFi like 802.11 a/b/g whatever you use.
Well, no not exactly. We need to examine how the signaling between a hub
and an end device works on standard utp
cabling in order to understand this.
There are transmit and receive pins on your PC and the hub
. This is standard numbering, that is, pin 2 on your PC corresponds to pin 2 on your hub
and so on. So, if pin 2 is the transmit pin, and you have a straight thru
cable, then the transmit pin is corresponding to the transmit pin as opposed to the transmit pin on one end corresponding to the receive pin on the other end. This is where we need hte crossover
cable - the conductors in the cable are laid out in reverse on either end. A hub
actually internally reverses the transmit/receive pin numberings so that you do not need a cross-over cable from your PC to the hub
. Instead we use a straight thru
If you need to connect two PCs directly (or a console
ot a PC for example), we need a crossover
cable in order to get T & R corresponding with T & R at hte other end. The same goes for two hubs, switches, etc
Many hubs have a little hardware switch
you can push labeled uplink or mdi/mdi-x and it will electrically reverse the pinouts on teh port so you can connect two hubs/switches/etc
together. Newer Cisco switching gear has a software option to make a port an mdix port and thus an uplink port. In practice usually we just use a cross over cable.
It's also worth noting that you'll usually find fiber optic uplink ports on switches to be SC connectors which is a type of connector
that is one per strand
so you can reverse which side they go into on one end. Otherwise with something like an LC or MTRJ connector
, you'e got a single molded piece that you can't flip on the other end.