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| PC Maintenance | .. | |
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| Straight Through | .. | .. |
Ethernet 10/100Base-T Crossover Cable
To avoid the expensive hub unit when only two systems are to be connected to each other directly at Ethernet Cards with this cable called Crossover Cable. With compatible software this cable is both for 10Base-T and 100Base-TX cards. This MALE RJ45 PIN is inserted directly into Ethernet Cards of both the Machines.
100Base-Tx uses 4 wires (2pairs) to transmit data against the 100Base-T4 cable which uses all 8 wires (8pairs). Etherenet 100Base T4 is generally works at nearly 100mbps with standard 100mbps HUB. But it works at nearly 200mbps with a Network Switch (Extended Version of HUB).
Front view of the RJ45 MALE pin. |
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Pin's top with Locking clip |
Pins in serial order of two ends of same cable. This is applicable to both (10Base and 100Base) crossover cables given on this page.
One End |
Other End |
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| Pin | Colour |
TWO ENDS OF RJ45 CROSS OVER CABLE |
Pin | Colour |
| 1 | White/Orange | 1 | White/Green | |
| 2 | Orange | 2 | Green | |
| 3 | White/Green | 3 | White/Orange | |
| 4 | Blue | 4 | White/Brown | |
| 5 | White/Blue | 5 | Brown | |
| 6 | Green | 6 | Orange | |
| 7 | White/Brown | 7 | Blue | |
| 8 | Brown | 8 | White/Blue | |
Making the Cable
RJ45 jacks are to be made with special RJ45 cable with EIGHT cores of wires, RJ45 pins and cable must be connected with a RJ45 cable.
Secure the wires in the RJ45 plugs with a Crimping Tool (available at B&Q, Srewfix, Maplins, PC World, PC Warehouse, etc; for appx £12).
- Line the cable up with the end of the plug and mark the cable where it sits level with the cable clamp on the plug.
- Strip the outer insulation at your mark to expose the inner wires. Don't break the insulation on the wires!
- Trim the insulation from the end of the wires by appx 2mm - Don't cut all the way through!
- Push the wires into the RJ45 plugs - make sure that each plug is the same way round, eg hook at top
- Make sure that you are putiing the correct wires into the correct pins
- Locate the RJ45 plug into the Crimp tool and lock down.
- This will crimp the wires into the pins and secure the shielding by the cable clamp (if you measured correctly)
- The first cable that you make will take about 15 minutes. With practise, it will take about 3-5 minutes
Another method is to take a normal/straight-through cable and cut it in the middle.
Separate the core-wires of the cable.
Solder them as with the correct pinouts and then wrap insulation tape around the joins then tape all the wires together.