Question about Cat5e 7 FT 350MHz Snagless RJ45 UTP Network Patch Cable (CAT5E350MHZ7FT)

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Can i transmit +12v through CAT cables?

My communication is a 4 wire communication and I am using a RS485 standard. IS there any standard pinouts for RS485 connector?

Out of the 4 wire, two wires are for + and - Differential signals. One wire for ground and other for Vcc. Can i transmit +12v through 4 wire CAT cables?

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Re: can i transmit +12v through CAT cables?

Describe your problem more correctly.
As i`ve understood i`re trying to transmit 12V via standart UTP Cable?
If it`s so - you can transmit 12V up to 40 meters length on this type of cable, if the current isn`t bigger than 2 A

Posted on Jan 08, 2008

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I only want to know the meaning of the different colours of cables that are used in crossover cables?

the standard colours for CAT5(e) or CAT6 ethernet cable are:

green, green stripe
blue, blue stripe
orange, orang stripe
brown, brown stripe

the typical setup for an ethernet connection in an RJ45 (the crystal end with the connection tab towards you) is

1 green stripe gclosen.jpg
2 green
3 orange stripe
4 blue
5 blue stripe
6 orange
7 brown stripe
8 brown

Wires 1 & 2 are used to transmit data from the PC to the router/modem (TX) and wires 3 & 6 are used to recieve information from the modem/router (RX). in this fasion, information flows along one pair or another and is expected to arrive at that pinout. the router/hub/modem takes care of the transition to the next cable or out to the internet.

In a crossover cable ONE end is configured as above, but the colours for wires 1, 2, 3, and 6 are exchanged so that when no hardware is between the two PCs/components the signal is transmited at wire 1 & 2 and recieved on pins 3 & 6 on the other system/component. the other colours are placed for backward compatibilitiy and other applications, such as power over ethernet.

following the standard above allows anybody familiar with RJ45 connections repair a connection with a standard colour code and pattern without having to see the other end. If you know you need to replace one end of a patch cable, you use the standard termination.


Oct 12, 2010 | Network Accessories

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Cat5e Single Socket RJ45 Ethernet Network Face Plate

My preference is to use the T-568b if there is not already a standard where you are doing the installation at. The A and B are just different standards to terminate an ethernet cable.
TIA/EIA-568-A, T-568B RJ45 Wiring Standards

To answer your question..If you want a straight through connection you would use T-568B (or T-568A) at both ends of the cable.

T-568B T-568A
-------------------------- ------------------------
Pin Color Pin Name Color Pin Name
--- ------------- -------- ------------- --------
1 Orange Stripe Tx+ Green Stripe Rx+
2 Orange Tx- Green Rx-
3 Green Stripe Rx+ Orange Stripe Tx+
4 Blue Not Used Blue Not Used
5 Blue Stripe Not Used Blue Stripe Not Used
6 Green Rx- Orange Tx-
7 Brown Stripe Not Used Brown Stripe Not Used
8 Brown Not Used Brown Not Used

Dec 31, 2009 | Cat5e Cat.5E Connection Box (512114)

1 Answer

Max cable lenght for cat 6e cable

The cable standard provides performance of up to 250 MHz and is suitable for 10BASE-T / 100BASE-TX and 1000BASE-T / 1000BASE-TX (Gigabit Ethernet). It is expected to suit the 10GBASE-T (10Gigabit Ethernet) standard, although with limitations on length if unshielded Cat 6 cable is used. Category 6 cable can be identified by the printing on the side of the cable sheath.

Cat5e is suitable for 10/100/1000baseT ethernet for 100 meters, when properly installed.
Cat 6 is also good for 10 gig ethernet for 37 meters, but that is pretty short, unless just in a server room.
There is no Cat 6e, but Cat 6A will be good for 10/100/1000/10GbaseT ethernet for 100 meters.
Unshielded Twisted Pair has no ground shield around the wires. It is the standard in the US, where most network standards were defined. There are extensions to the standards to allow for the more common in Europe, Shielded Twisted Pair.
Some Cat-6 cables are too large and may be difficult to attach to 8P8C connectors without a special modular piece and are technically not standard compliant. If components of the various cable standards are intermixed, the performance of the signal path will be limited to that of the lowest category. The maximum allowed length of a Cat-6 cable is 100 meters (330 ft) when used for 10/100/1000baseT and 37 meters (120 ft) when used for 10GbaseT. This applies for UTP cables only. Shielded Cat 6 and Cat 7 cables are capable of 100m.....sodeep

Jul 30, 2009 | Cables Unlimited CAT6 (UTP-7220) (UTP7220)

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What is UTP CAT 5e cabel?

This 1000 foot, spool-boxed roll of grey Cat5e bulk cable is a must-have for extensive networking. This unterminated and UTP (unshielded twisted pair) cable is perfect for a plethora of networking applications.
Cat-5e, enhanced Cat-5 cable, is the standard for modern networking - enabled for far end crosstalk and compliant with up to 1000BASE-T standards. This unshielded cable comes in its own spool box and is connector free, giving the user the freedom to customize the length, wiring, and application.
This cable is 1000 feet long and are marked at every foot (marked 0001 - 1000 at each foot).
Wire the cable as either a patch or a crossover cable, use it for Ethernet or any other data transfer applications. Sewell Direct works hard to bring you affordable Cat5e bulk cable solutions.

Jan 13, 2009 | Intellinet Active Networking CAT5e UTP...

2 Answers

Lan cable Setting for Switch & PC to PC LAN Connection.

If you are asking about connecting two computers together with a hub or switch, plug them into the switch/hub with standard patch cables (cat 5e or cat 6).

If you are asking about connecting two computers together directly using a LAN cable, then you will need a "Crossover" cable (cat 5e) wired specially (oranges transposed at one end for the common -B pattern) for direct LAN connection.

Jan 01, 2009 | Network Accessories

2 Answers

How do you wire the cat 5e multi jack? Which wires go where?

Hi tonybenjamin

Here are the pinouts for a regular fly lead (PC to Switch"hub") and for a cross over cable (PC to PC)
Front view of the RJ45 MALE pin. Pin's top with Locking clip 02ca060.jpg
1. Fly Lead

Name Pin Wire Color Pin Name TX+ 1 White/Orange 1 TX+ TX- 2 Orange 2 TX- RX+ 3 White/Green 3 RX+ 4 Blue 4 5 White/Blue 5 RX- 6 Green 6 RX- 7 White/Brown 7 8 Brown 8
2. Cross Over

Name Pin Pin Name TX+ 1 3 RX+ TX- 2 6 RX- RX+ 3 1 TX+ RX- 6 2 TX- Extra Pins 4 4 Optionl Pins
(connected straight
to same pins) 5 5 7 7 8 8


Dec 14, 2008 | Leviton Quickport 5G108 Category 5e...

1 Answer

Phone to Cat5e cabling - How do I wire the wall plate

Wire your phone box using your Cat5 cable, use 4 wires instead of 8 wires of Cat5.

Nov 20, 2008 | Cat5e Unshielded Twisted-Pair Patch Cable...

1 Answer


Against my better judgement, because crimping doesn't work half the time, here's the color code.

A 4-pair Cat-5e or 6 cable has BLUE, ORANGE, GREEN, and BROWN pairs. The ones with the most white are called Tip. In a 568B wiring scheme, they go 54361278.

or, like this

1 2 3 4 5 6 7 8

wo ow wg bw wb gw wbr brw

Data is actually carried on pins 1 2 3 and 6.

If you wire the other end of the cable the same way as above, it's called a straight through cable.

If you reverse the orange and green pairs, it's a crossover cable. This is also the pattern for 568A

1 2 3 4 5 6 7 8
wg gw wo bw wb ow wbr brw

Getting the wires to untwist and behave is half the fun, that's why we use special plugs when we absolutely have to crimp. Otherwise, we use a jack and patch cord.


Oct 23, 2008 | GE (JASHO96273)

2 Answers

Single-line data transfer

No, a data transfer cable always need send and receive to be sure the packet of data are reaching the destination.

Sep 16, 2008 | Network Accessories

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