|
Crossover cable |
| Elena Gršković e_gr_2001@yahoo.com Eng-Inf; 3.god. |
Vedrana Boljkovac vedrana.boljkovac@ri.htnet.hr Ped-Inf; 3.god. |
Lucia Načinović lucia_nacinovic@yahoo.com Eng-Inf; 3.god. |
 |
 |
| A crossover cable is a
cable that is used to interconnect two computers by "crossing over"
(reversing) their respective PIN contacts. Either an RS-232C or a telephone
jack connection is possible. A crossover cable is sometimes known as a null
modem. Possible reasons to connect two computers directly to each other
include: Playing a game competitively (one person at each computer) with fast response time Testing one computer by examining its behavior at the other computer Saving the cost of a hub when you want to interconnect two devices in the same home or office Ethernet crossover cables are most often used in home networks when connecting two ethernet computers without a hub. An Ethernet crossover cable has it's send and receive wires crossed. When using a hub or switch, this is automatically done for you. Unfortunately some devices like cable and dsl modems have their actual ethernet plugs reversed. This is to allow people to hook up a cable modem to a computer without a special crossover cable. When adding a hub into the mix, the issue can get confusing. Most modern hubs and switches have what is called an uplink port on them. This is the same kind of 'reversed' port that is on a cable or dsl modem. Before we see how to make a crossover cable, let's start with a regular cat5 patch cable. There isn't much difference between a crossover cable and a regular patch cable. Below is what a patch cable looks like. Here's what a crossover cable looks like. Notice only one end has changed. Wires 1 and 3 have been transposed, and 2 and 6 have also been transposed. You might want to bookmark this page. Double checking your wiring before you crimp an end on can save you time and effort. If you only work with cat5 occasionally, it's easy to forget. |
| Izvori: http://www.perfectdrivers.com/howto/crossover.html http://www.homenethelp.com/web/explain/about-ethernet-crossover.asp |