| Networking Topics |
| Windows XP Prof Windows XP Home Windows 2000 Server Windows 2000 Prof Windows NT4 Server Windows NT4 Work. Windows ME Windows 98 Windows 95 Windows 3.x MS-DOS Step-By-Step Network Basics Trouble Shooting Exchange Server e-Mail Security e-Mail Spam ISA-Server Server Software Windows Security |
| Featured Product |
| Network Addons |
| Direct Cable
- Serial / Parallel - Infrared - USB - High Speed Cables - WLAN - Wireless - Jokes ( computer ) - Download Site  |
Twisted Pair Ethernet (10baseT/UTP) Wiring
When connecting just 2 PC's together with Twisted Pair Ethernet
(10baseT/UTP ) ,
there is a possibility to do it without a hub:
BUT: it is now a different type of cable: it is
a "crossed" 10baseT cable !
Using a 'regular' cable (which is supposed to be used for
connection to a hub) is a common
cause of error, such a 'regular' or 'straight' 10baseT cable does
NOT work in such a configuration
without a hub.
I strongly suggest to purchase a cable, but if you think you can
make it properly, here is the layout
of such a crossed 10baseT-cable (i.e 10 MHz, this
cable is NOT for 100baseT/100Mhz, for that look at Twisted Pair
Ethernet (100baseTX/100BaseT4) )
(please see also : www.johnscloset.net/wiring/index.html
)
| pin | pin | ||
| 1 | <--------------------------------> | 3 | |
| 2 | <--------------------------------> | 6 | |
| 3 | <--------------------------------> | 1 | |
| 4 | < not used > | ||
| 5 | < not used > | ||
| 6 | <-------------------------------------> | 2 | |
| 7 | < not used > | ||
| 8 | < not used > |
On Category 3 or 5 grade Twisted pair cable, it should be wired
as:
| Pin | wire | signal |
| 1 | White/Orange | Transmit - |
| 2 | Orange/White | Transmit + |
| 3 | White/Green | Receive - |
| 4 | Blue/White | |
| 5 | White/Blue | |
| 6 | Green/White | Receive + |
| 7 | White/Brown | |
| 8 | Brown/White |
where pin1 is the one on the left if you hold the RJ45 connector
with
the pins facing up. 4,5,7,8 not used in 10mb network.
To make a Cross Over patch cable for hub to hub or computer to
computer connections:
| Pin | Connector#1 | <---cable---> | Pin | Connector#2 |
| 1 | White/Orange | 1 | White/Green | |
| 2 | Orange/White | 2 | Green/White | |
| 3 | White/Green | 3 | White/Orange | |
| 6 | Green/White | 6 | Orange/White |
for distances over 10ft, the "pairs" are important for
data loss prevention.
[less errors due to electromagnetic fields].
Where is Pin#1:
 |
 |
 |
Making a
cross-cable yourself ? You will need to invest in proper tools (which may be more expensive than buying a small hub and regular cables) More information on Self-Made Twisted Pair cables : www.duxcw.com |