Internetworking Part 8

Ethernet cabling is a rather important topic, especially for those seeking certification.  However, on the same note, it is quite easy once you gain the hang of it.  There are three types of cabling:

  • Straight-through cable
  • Crossover cable
  • Rolled cable

Straight-Through Cable:

The straight-through cable is used to connect

  • Host to switch or hub
  • Router to switch or hub

Standard, Straight-Through Wiring Diagram(both ends are the same):

RJ45 Pin #

Wire Color
(T568A)

Wire Diagram
(T568A)

10Base-T Signal
100Base-TX Signal

1000Base-T Signal

1 White/Green   Transmit+ BI_DA+
2 Green   Transmit- BI_DA-
3 White/Orange   Receive+ BI_DB+
4 Blue   Unused BI_DC+
5 White/Blue   Unused BI_DC-
6 Orange   Receive- BI_DB-
7 White/Brown   Unused BI_DD+
8 Brown   Unused BI_DD-

Straight-Through Ethernet Cable Pin Out for T568A

 

 

 

 

 

RJ45 Pin #

Wire Color
(T568B)

Wire Diagram
(T568B)

10Base-T Signal
100Base-TX Signal

1000Base-T Signal

1 White/Orange   Transmit+ BI_DA+
2 Orange   Transmit- BI_DA-
3 White/Green   Receive+ BI_DB+
4 Blue   Unused BI_DC+
5 White/Blue   Unused BI_DC-
6 Green   Receive- BI_DB-
7 White/Brown   Unused BI_DD+
8 Brown   Unused BI_DD-

Straight-Through Ethernet Cable Pin Out for T568B

Crossover Cable:

The crossover cable is used to connect

  • Switch to switch
  • Hub to hub
  • Host to host
  • Hub to switch
  • Router direct to host

Essentially, this type of cable permits connecting like, or similar, equipment together.

Rolled Cable:

The rolled cable is used to connect a host to a router console serial communication (com) port.  The pinout of the cable itself is the direct opposite from each end (i.e., 1-8, 2-7, 3-6, 4-5, 5-4, 6-3, 7-2, 8-1).

See also: Part 1, Part 2, Part 3, Part 4, Part 5, Part 6, Part 7

Works Cited

Lammle, T. (2007). CCNA Cisco Certified Network Associate Study Guide. Indianapolis: Wiley Publishing, Inc.

https://www.youtube.com/watch?v=482VtesZwZ8

http://www.incentre.net/content/view/75/2/

http://www.petri.co.il/csc_the_basics_of_ethernet_cabling.htm

http://www.ertyu.org/steven_nikkel/ethernetcables.html

2 responses to “Internetworking Part 8

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