Straight-Through refers to cables that have the pin assignments
on each end of the cable. In other words Pin 1 connector A goes
to Pin 1 on connector B, Pin 2 to Pin 2 ect. Straight-Through
wired cables are most commonly used to connect a host to client.
When we talk about cat5e patch cables, the Straight-Through
wired cat5e patch cable is used to connect computers, printers
and other network client devices to the router switch or hub
(the host device in this instance).
- Connector A
- Pin 1
- Pin 2
- Pin 3
- Pin 4
- Pin 5
- Pin 6
- Pin 7
- Pin 8
- Connector B
- Pin 1
- Pin 2
- Pin 3
- Pin 4
- Pin 5
- Pin 6
- Pin 7
- Pin 8
Crossover Wired Cables
Crossover wired cables (commonly called crossover cables) are very much like Straight-Through cables with the exception that TX and RX lines are crossed (they are at oposite positions on either end of the cable. Using the 568-B standard as an example below you will see that Pin 1 on connector A goes to Pin 3 on connector B. Pin 2 on connector A goes to Pin 6 on connector B ect. Crossover cables are most commonly used to connect two hosts directly. Examples would be connecting a computer directly to another computer, connecting a switch directly to another switch, or connecting a router to a router.Note: While in the past when connecting two host devices directly a crossover cable was required. Now days most devices have auto sensing technology that detects the cable and device and crosses pairs when needed.
- Connector A
- Pin 1
- Pin 2
- Pin 3
- Pin 4
- Pin 5
- Pin 6
- Pin 7
- Pin 8
- Connector B
- Pin 3
- Pin 6
- Pin 1
- Pin 7
- Pin 8
- Pin 2
- Pin 4
- Pin 5
Rollover Wired Cables
Rollover wired
cables most commonly called rollover cables, have opposite
Pin assignments on each end of the cable or in other words
it is "rolled over". Pin 1 of connector A would be connected
to Pin 8 of connector B. Pin 2 of connector A would be connected
to Pin 7 of connector B and so on. Rollover cables, sometimes
referred to as Yost cables are most commonly used to connect
to a devices console port to make programming changes to
the device. Unlike crossover and straight-wired cables,
rollover cables are not intended to carry data but instead
create an interface with the device.
- Connector A
- Pin 1
- Pin 2
- Pin 3
- Pin 4
- Pin 5
- Pin 6
- Pin 7
- Pin 8
- Connector B
- Pin 8
- Pin 7
- Pin 6
- Pin 5
- Pin 4
- Pin 3
- Pin 2
- Pin 1
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