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Um. Aren't all network cables the same?

Crossover cables are used to connect like devices (router to router, router to computer, computer to computer, switch to switch) and crossover cables are used to connect unlike devices (computer to switch, router to switch).

Crossover just switches the Tip and Ring. Text
 
Originally posted by: spidey07
Just a quick note...

tip and ring remain the same. transmit and receive are swapped however.
Click to expand...
Yeah, you're right. I'm not sure what I was thinking about.
 
Originally posted by: Madwand1
Here's another link of possible interest and accuracy.

http://en.wikipedia.org/wiki/Category_7_cable

I need affordable consumer 10 GbE. Until then, my standard for cables is roughly -- has the cat chewed through it? How badly? 🙂
Click to expand...

Well with the push for 10 gig over copper and the truly wired home complete with HD video and live streaming content. 10 gig will be here faster than we know.
 
Originally posted by: BornStar18
Originally posted by: spidey07
Just a quick note...

tip and ring remain the same. transmit and receive are swapped however.
Click to expand...
Yeah, you're right. I'm not sure what I was thinking about.
Click to expand...

I know you know.....you just jogged my old "tip/ring" head for a while.
 
Originally posted by: spidey07
Originally posted by: Madwand1
Here's another link of possible interest and accuracy.

http://en.wikipedia.org/wiki/Category_7_cable

I need affordable consumer 10 GbE. Until then, my standard for cables is roughly -- has the cat chewed through it? How badly? 🙂
Click to expand...

Well with the push for 10 gig over copper and the truly wired home complete with HD video and live streaming content. 10 gig will be here faster than we know.
Click to expand...

That's why I am happy to install CAT 6 and certify everywhere I can. It will support 10 Gig for 55 meters, or so they say.
 
Originally posted by: skyking
That's why I am happy to install CAT 6 and certify everywhere I can. It will support 10 Gig for 55 meters, or so they say.
Click to expand...

Exactly. Anybody that installs cat5/e on a new install is in for a rude awakening and will be smacking themselves later.

Get this - back in the day people installed category 3 cable because "we don't need category 5....it cost 10% more and besides, no computer even needs 100 Base-T and not only that the price per port means no computer will ever need 100 megabit"

5 years later (1999) they are still running at 10 megabit ethernet and smacking their forehead. don't muck with the phyisical layer man.


/rant
Only shortsighted fools run cat5e in this day and age.
 
Originally posted by: spidey07
Originally posted by: skyking
That's why I am happy to install CAT 6 and certify everywhere I can. It will support 10 Gig for 55 meters, or so they say.
Click to expand...

Exactly. Anybody that installs cat5/e on a new install is in for a rude awakening and will be smacking themselves later.

Get this - back in the day people installed category 3 cable because "we don't need category 5....it cost 10% more and besides, no computer even needs 100 Base-T and not only that the price per port means no computer will ever need 100 megabit"

5 years later (1999) they are still running at 10 megabit ethernet and smacking their forehead. don't muck with the phyisical layer man.


/rant
Only shortsighted fools run cat5e in this day and age.
Click to expand...

Or people whos bosses are too shortsighted and too cheap to implement. Let's not blame it on the guy running the cable here. 😉
 
Smallish threadjack🙂

How many people have deployed shielded cat5e? I had a request to put 12 drops on the demarc board and about 150' of run to the datacenter, also terminated in a 12 port.
I have no idea why he wants shielded, for what will likely be a few T1 connections from smart jacks in the demarc closet. Maybe they are concerned about the proliferation of blackberry devices🙂
 
Shielded UTP is called "Screened" UTP.

Don't do it. Run away.

Improperly installed screened (or shielded ) cabling is worse than barbed wire for data. All components must be designed for screened cabling. The grounding must be done properly ... if you don't ground the screen, or don't ground it properly, the system will not perform well, if at all.

There is no need for screened or shielded cabling in most situations.

If the customer doesn't agree, then walk away and save yourself a massive headache.

If you decide to not walk away, then sub the job out to a cabling installer that knows how to deal with sUTP.

Shielded cabling has a nominal impedence of ~150 ohms, sUTP is ~100 ohms (as is normal UTP).

Run, don't walk from this install.

Good Luck

Scott
 
Originally posted by: BornStar18
Crossover cables are used to connect like devices (router to router, router to computer, computer to computer, switch to switch) and crossover cables are used to connect unlike devices (computer to switch, router to switch).

Crossover just switches the Tip and Ring. Text
Click to expand...
As Spidey said this post is jogging the brain this morning (need more coffee).

I think what you meant to say:
Crossover cables are used to connect like devices (router to router, router to computer, computer to computer, switch to switch) and standard patch cables are used to connect unlike devices (computer to switch, router to switch).

Crossover just switches the transmit and recieve.
Click to expand...
The "easy" description I like to give people is to a set of tin-cans on string. If you and I are talking directly to eachother I must put the can connected to the string you are talking into against my ear and vice-versa for us to have a conversation (aka cross-over).

It's easier to explain with hands and/or paper, but you get the idea 😉
 
/rant
Only shortsighted fools run cat5e in this day and age.
Click to expand...
No kidding, my house is only 2 years old and I'm already beating myself up for running cat5e. Granted I dont have anything that could take advantage of cat6 yet, but I'm wishing I hadnt limited myself like that...
 
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