Can you use 8-pin phone wire for ethernet connections?

Hi

It depends on which country you are in.

It depends what Broadband wiring setup you have.

It depends which type of cable you are talking about (see images 1 and 2 below)

In some countries, the RJ11 to RJ11 cable goes from this device into the phone Socket of an ADSL filter. One RJ45 to RJ45 cable goes from the Router into the Ethernet Socket of the ADSL Filter. Another RJ45 to RJ45 cable goes from the Router to the Computer. The ADSL Filter then goes into the Phone socket in the wall.

You need an ADSL Filter in every Phone Socket that has a telecommunications device attached to it (Fax Machines, Answering Machines, TV Set Top Boxes, games Consoles etc.). The ADSL filter separates Telehone, Voice & Fax Data traffic from Broadband traffic and allows all to share the same phone line with out conflict.

See Network Diagram below.

In some countiries or wiring setups, the RJ45 to RJ45 cable form the Router to the Wall does not need to go via the Phone Socket and can go directly into its own dedicated Ethernet Wall Socket.

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IMAGE 1: RJ11 to RJ11 or ADSL MODEM or BROADBAND or TELECOMS or TELEPHONE Cable







IMAGE 2: RJ45 to RJ45 or CAT5E or LAN or ETHERNET Cable


DIAGRAM 1: Typical UK Home Broadband Network Diagram

Thanks for using FixYa

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
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.

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

There are two standards for ethernet wiring. Most cables use the B standard, but many manufacturers of central wiring boxes (OnQ, LeGrand, SmartHome) have central units wired to the A standard. Wall outlets have to be wired to the same standard as the central unit, assuming there is one. You have to determine whether the other end of whatever you are wiring is wired to the A or B standard. If you are wiring both ends yourself, use the B standard. The wiring diagrams are here:
http://www.incentre.net/content/view/75/2/

Sure you can,

But.... what are you going to use it for? if to connect 1pc to another there will be no connection, as for a telephone line only have 4 lines and the RJ45 connection to PC uses 8

usb female to rj45 adopter

Unless you have a RJ45 crimping tool you are stuck with having to ask someone who does have one to borrow it, honestly if you know someone with a crimping tool then ask them to perform the repair.
If however you have the tool for a straight through cable (most common)
Holding the plug upside down (catch towards the floor) and the pins furthest away from you I use the following layout;

orange white (furthest left hand side)
orange
green white
blue
blue white
green
brown brown white (furthest right hand side)

slide the cables into the plug held in the position describe above, then check the order of each wire once more using the crimping tool to "crimp the new RJ45 connection in place.

Basically as long as you hold the rj45 connector in the same position the wires should go into the same corresponding position at each end.

If you have a BackUPS CS, you are probably either using it with the USB cable that is supplied or with the 940-0128A supplied by APC, which permits running the UPS in dumb mode. By building your own cable, you can now run the BackUPS CS models (and perhaps also the ES models) using smart signalling and have all the same information that is available as running it in USB mode.
The jack in the UPS may be easily use a 8 pin RJ45 connector. It is easy to construct the cable by cutting off one end of a standard RJ45-8 ethernet cable and wiring the other end (three wires) into a standard DB9F female serial port connector.
PC Signal PC pin UPS Pin UPS signal RxD 2 2 TxD TxD 3 8 RxD GND 5 7 Ground FG Shield 4 Frame Ground Though these UPSes are USB UPSes, APC supplies a serial cable (typically with a green DB9 F connector) that has 940-0128A stamped into one side of the plastic serial port connector.
Here is suggested scheme of original 940-0128A cable
APC Part# - 940-0128A computer --------- Inside the Connector--------- UPS DB9-F | | RJ45 pin - signal | | Pin - Color | | 4 DSR ->|---+ | | | diode resistor | 6 DTR ->|---+---->|----///---o kill power | 8 Orange | | 1 DCD <-|----+ | | | | 2 RxD <-|----+----------------+--o low battery| 3 Brown | | | 7 RTS ->|----------+--///--+ | | | | | +--///--+ | | | | 8 RI <-|----+----------------+--o on battery | 2 Black | | | 9 CTS <-|----+ | | signal | 5 GND --|-----------------------o ground | 7 Red | | 3 TxD | | | chassis | Chassis/GND |-----------------------o ground | 4 Black | | | Not connected | 1, 5, 6, 9, 10 --------------------------------------

568-B Wiring
Pair Wires RJ-45 pins
1-White/Blue White/Blue 5
Blue/White 4
2-Wht./Orange White/Orange 1
Orange White 2
3-White/Green White/Green 3
Green/White 6
4-White/Brown White/Brown 7
Brown/White 8
568-A Wiring
1-White/Blue White/Blue 5
Blue/White 4
2-White/Green White/Green 1
Green/White 2
3-White/Orange White/Orange 3
Orange/White 6
4-White/Brown White/Brown 7
Brown/White 8
RJ-45 Pins are with the spring tab down and read left to right. Do you have an RJ-45 Crimping tool?
Just use 568-B or 568-A on both ends of the same cable.