Computer Network. Few notes



Multiplatform FAQ: cables, connectors, notes
Platform:Header and description
WIN9X/NT4/NT5 UTP and BNC in one computer or 2 ethernet cards is it possible? Yes. And we don't need HUB!. All you need to use different IP addresses for each ethernet card. Or use different protocols. Let's say we have 3 computers A,B,C. Computer B with 2 ethernet cards:
A<-----UTP------>B<-----BNC----->C<---BNC--...
A can see B. B can see A,C and etc. C can see B and other if connected, but didn't see A. For all other network (workgroup) computer A is invisible.
Sample configuration for information only:
4 computers:
  • A: Pentium 233, Win95, PCI ehternet, UTP only, IP 192.168.1.3, Bindings: Client for MS networks.
  • B: Pentium 300, Win98, PCI ethernet card, UTP only, IP 192.168.1.4, Bindings: File and printer share service for MS networks. ISA ethernet card, BNC, IP 192.168.0.7, Bindings: Client for MS networks. Share: whole harddisk
  • C: Pentium 400, WinNT4.0, ISA ethernet, IP 192.168.0.8, Bindings: File and printer share service for MS networks, Client for MS networks. Shared: CDROM, some file folders.
  • D: Pentium 100, Win95, ISA ethernet card, BNC, IP 192.168.0.5, Bindings: File and printer share service for MS networks, Client for MS networks. Shared: HP printer, file folder.
All computers use netmask 255.255.255.0
Computer A can run programs from computer B and use all files in computer B. Computer B can use printer from D computer, access files from C and D computers, and CD from C. Computer C can access files and HP printer from D computer. Computer D can access files and CD from C computer.
Don't forget to set all needed shares, passwords and permissions.
MultiplatformUTP cable for direct connection between 2 computers.
SEE BELOW
I am not sure that it is ideal cable, but it works with my computer.
(Check that wire twisted pairs are not mixed)
MAC=AMIGA/WINDOWSNull modem cable and file transfer using terminal programs:
Null modem Null modem
Partial hardware handshking cable		 Null modem
Full hardware handshaking (7 wire) cable
Source: TEC 472 Label printer Manual
AMIGA=WINDOWS
WINDOWS=WINDOWS
MULTIPLATFORM Difference between 10BASE-T and 100BASE-TX Ethernet features
 10BASE-T100BASE-TX
Cables supportedCategory 3, 4 or 5 UTP/STPCategory 5 UTP/STP
Network Diameter2500 meters205 meters
Lobe Length100 meters100 meters
ConnectorRJ-45RJ-45
Half-duplex10 Mbps100 Mbps
Full-duplex20 Mbps200 Mbps
Repeater LayersUp to threeone
Swithing HubOptionalRecommended
Source: GF100TXRII Fast Ethernet Card User's Guide.


CONNECTOR:
RJ-45 Connector pin assignment UTP Connector
ContactMedia Direct Interface Signal
1Tx + (transmit)
2Tx - (transmit)
3Rx + (receive)
4Not used (telephone)
5Not used (telephone)
6 Rx - (receive)
7Not used
8 Not used

CABLES:
UTP cross cable
Crossover cable for Switch (MDI-X port) to switch/hub or other network device (MDI-X port) connection. Or connection of 2 computers without switch. 		UTP straight cable
Straight cable for Switch (Uplink MDI port) to switch/Hub or other device connection. Computer- HUB connection.
Source: EP-805X-N/EP-808X-N 5/8-Port 100/10M N-Way Mini Switch Hub User's Manual, www.surecom-net.com, www.surecom.com.tw.

Reccomended straight UTP cable (EIA/TIA 568A reccomendations):
UTP cable
Note: same colors indicate same twisted pair
[PIN:4,5-I pair; 3,6-II pair; 1,2-III pair; 7,8-IV pair.]

COLOR CONVERSION LAN-TELEPHONE:
TELEPHONELAN
1ORANGEGREEN
2BLUEWHITE GREEN
3YELLOWORANGE
4REDBLUE
5GREENWHITE BLUE
6BLACKWHITE ORANGE
7 BROWN
8 WHITE BROWN

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VER1.5, 2002.02.20