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Patch Cable vs Regular Ethernet

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Go to solution Solved by dany_boy,

The electrical difference between a patch and a crossover cable is neatly illustrated with this image:

EthernetRJ45A.gif.4c7acba32a8c10251e47755573540e00.gif

Basically the TX and RX pairs are switched. However, a little something called MDI-X allows most recent devices to auto detect if they need to apply crossover or not

Posted

Now before any mods or admins close the topic, hear me out because I was having a weird issue last night.

 

My current network setup is to run point to point through the electricity (very good). I originally had a cat5e cable running to a gigabit switch, then a cat5e patch cable running to my pc. I decided to remove the switch altogether as it wasn't needed. So, I plugged the cat5e patch cable directly into my pc. Originally I was getting like 20mbps down and 4mbps up. Then all of a sudden I was getting 4mbps down and 4mbps up.

 

Can anyone explain this weird occurrence?

 

Is there any difference between the two?

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No idea why this happened. If you mean that patch cable is "straight", then no, they aren't different. Most crossing over is done by the switch if needed, IIRC.

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2 minutes ago, jkeasley said:

Now before any mods or admins close the topic, hear me out because I was having a weird issue last night.

 

My current network setup is to run point to point through the electricity (very good). I originally had a cat5e cable running to a gigabit switch, then a cat5e patch cable running to my pc. I decided to remove the switch altogether as it wasn't needed. So, I plugged the cat5e patch cable directly into my pc. Originally I was getting like 20mbps down and 4mbps up. Then all of a sudden I was getting 4mbps down and 4mbps up.

 

Can anyone explain this weird occurrence?

 

Is there any difference between the two?

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2 minutes ago, jkeasley said:

Now before any mods or admins close the topic, hear me out because I was having a weird issue last night.

 

My current network setup is to run point to point through the electricity (very good). I originally had a cat5e cable running to a gigabit switch, then a cat5e patch cable running to my pc. I decided to remove the switch altogether as it wasn't needed. So, I plugged the cat5e patch cable directly into my pc. Originally I was getting like 20mbps down and 4mbps up. Then all of a sudden I was getting 4mbps down and 4mbps up.

 

Can anyone explain this weird occurrence?

 

Is there any difference between the two?

Shouldn't make a difference, but it might depend on if the patch cable is a crossover cable or not. 

 

TL:DR 

Straight through cables have wire 1 going to pin 1 on both ends, Crossover cables have wire 1 going to pin 8 on the other end. 

Complicated networking interface stuff from 15 years ago. Doesn't really matter anymore. 

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  • Solution

The electrical difference between a patch and a crossover cable is neatly illustrated with this image:

EthernetRJ45A.gif.4c7acba32a8c10251e47755573540e00.gif

Basically the TX and RX pairs are switched. However, a little something called MDI-X allows most recent devices to auto detect if they need to apply crossover or not

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