easy way to crimp rj45 connectors
19 August 2002, 11:28 AM
#1
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Hi,
Is there an easy way to crimp RJ45 connectors???
The crimping part is ok as I have a (cheap) crimp tool - but the problematic bit is lining up the thin 8 core so that the wires go in ok to the connector - and in the correct order!!!
Is there a tool to 'flatten' the 8 core to make it easier to get it in????
Is there an easy way to crimp RJ45 connectors???
The crimping part is ok as I have a (cheap) crimp tool - but the problematic bit is lining up the thin 8 core so that the wires go in ok to the connector - and in the correct order!!!
Is there a tool to 'flatten' the 8 core to make it easier to get it in????
19 August 2002, 11:41 AM
#2
Practice... 
Strip back the outer covering further than you need, makes straightening the wires & putting them in order simpler. Then once they are straightened to your satisafaaction, cut them back to the correct length b4 inserting into the plug & crimping
Easy
Strip back the outer covering further than you need, makes straightening the wires & putting them in order simpler. Then once they are straightened to your satisafaaction, cut them back to the correct length b4 inserting into the plug & crimping
Easy
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19 August 2002, 02:22 PM
#12
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dads a electrical engineer!
doesnt matter one bit
cross over just for the send and recieve bit i do believe.
If you sendin data
blue = blue
red = red
yellow = yellow
green = green
pink = pink
bad diagram yes, but you only sending the data down the cables if there same at each end then its fine!
Si
doesnt matter one bit
cross over just for the send and recieve bit i do believe.
If you sendin data
blue = blue
red = red
yellow = yellow
green = green
pink = pink
bad diagram yes, but you only sending the data down the cables if there same at each end then its fine!
Si
19 August 2002, 03:00 PM
#13
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Not quite... It may work, but it won't be reliable - certainly not over a long length, and certainly not at high (>100mbps) bandwidth.
Crosstalk is the biggest problem, and the twisted pairs helps to stop this.
True, it doesn't matter which pairs you use, as long as they are used as pairs and you are consistant with the pinout!(colours are just colours at the end of the day, so can be interchanged)
(Electronic engineer)
BTW I have crimped the RJ45 things with normal pliers and teeth...
Not fun, but it worked for a tempory measure...
[Edited by dnb - 8/19/2002 3:12:37 PM]
[Edited by dnb - 8/19/2002 3:23:03 PM]
Crosstalk is the biggest problem, and the twisted pairs helps to stop this.
True, it doesn't matter which pairs you use, as long as they are used as pairs and you are consistant with the pinout!(colours are just colours at the end of the day, so can be interchanged)
(Electronic engineer)
BTW I have crimped the RJ45 things with normal pliers and teeth...
Not fun, but it worked for a tempory measure...
[Edited by dnb - 8/19/2002 3:12:37 PM]
[Edited by dnb - 8/19/2002 3:23:03 PM]
19 August 2002, 03:05 PM
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imlach, why not get some punch down IDC type RJ45 sockets and put them on the wall like phone sockets. Then you can use RJ45 patch leads and have a professional looking job.
That's what I'm doing currently. (When I get round to finishing off the home network and the decorating)
That's what I'm doing currently. (When I get round to finishing off the home network and the decorating)
19 August 2002, 03:06 PM
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Providing the data is recieved at the same time, don't the different pairs differ in length and the amount of twists?
19 August 2002, 03:09 PM
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Mo, not that I'm aware - In theory it's possible to run two lots of network traffic down one 4 pair cable. I've not tried it myself, but I'm told (on good authority) that it works!
I would not do this unless I absolutely had to. Best stick to the standard pinout. We have standards for a very good reason
HHxx - great minds....
I would not do this unless I absolutely had to. Best stick to the standard pinout. We have standards for a very good reason
HHxx - great minds....
19 August 2002, 03:13 PM
#19
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dnb - tuned in to my frequency
Ive ran 2 sets of data down one 4 pair cable before. No problems. But can't do that now as VoIp has come in and power goes down the other pairs.
If you wired the 4 pairs any old way and its wired the same at the other end. Run a Omniscanner on it, it will scream at you.
H
Ive ran 2 sets of data down one 4 pair cable before. No problems. But can't do that now as VoIp has come in and power goes down the other pairs.
If you wired the 4 pairs any old way and its wired the same at the other end. Run a Omniscanner on it, it will scream at you.
H
19 August 2002, 03:20 PM
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There has to be some difference as the orange pair shows less NEXT than the rest.
[Edited by Mo - 8/19/2002 3:39:08 PM]
[Edited by Mo - 8/19/2002 3:39:08 PM]
19 August 2002, 03:53 PM
#22
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Imlach m8,
How have you run the cat5 cable? from a cupboard or just from a room with your PC?
I'd recommend running cables from a cupboard somewhere in the house (or even the basement/loft). Then you can terminate them in a proper patch panel where all the cables meet and just use sockets in each of the rooms. You can get sockets with modules for RJ45, TV Coax, FM, etc. and use these in rooms.
If you want to just run cable and use RJ45 crimp ends, then fair-do's, but they are a pain in the @rse to do and you just have to take your time and get on with it.
I usually undo the twisted pairs and get them all nice and neet (use 1 or 2 inches of exposed pairs). Once you have them together, cut the ends short ready for the RJ45 plug. This way they stay in their correct position and will just slot into the plug.
Whereabouts are you in Scotland? anywhere near the Central Belt?
Stefan
[Edited by ozzy - 8/19/2002 4:01:15 PM]
How have you run the cat5 cable? from a cupboard or just from a room with your PC?
I'd recommend running cables from a cupboard somewhere in the house (or even the basement/loft). Then you can terminate them in a proper patch panel where all the cables meet and just use sockets in each of the rooms. You can get sockets with modules for RJ45, TV Coax, FM, etc. and use these in rooms.
If you want to just run cable and use RJ45 crimp ends, then fair-do's, but they are a pain in the @rse to do and you just have to take your time and get on with it.
I usually undo the twisted pairs and get them all nice and neet (use 1 or 2 inches of exposed pairs). Once you have them together, cut the ends short ready for the RJ45 plug. This way they stay in their correct position and will just slot into the plug.
Whereabouts are you in Scotland? anywhere near the Central Belt?
Stefan
[Edited by ozzy - 8/19/2002 4:01:15 PM]
19 August 2002, 06:19 PM
#23
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Super Si,
Sorry mate but your Dad is talking about RS232 which is rarely used these days,
Cat 5 should be wired as follows
1 White/Orange
2 Orange/White
3 White/Green
4 Blue/White
5 White/Blue
6 Green/White
7 White/Brown
8 Brown/White
Each pair is twisted to a different degree to cut down cross talk.
I had a customer who swapped the blue and orange pairs and over about 15m it would default down to 10mbps due to the Skew effect (data arriving in the wrong order) He swapped out the connectors, then the cable and still had the same problem. Then he called me to see if I could help (cheeky git). Ran through everything he should check, got to the wiring, when he swapped the Blues & Oranges over, Bingo it worked.
Also you are better using a patch panel as that way everything "in the building" is fixed. If you break a patch lead, they are only 90p, its much easier to chuck em and plug a new one in than muck about having to reterminate and test.
Cheers
Andy
Sorry mate but your Dad is talking about RS232 which is rarely used these days,
Cat 5 should be wired as follows
1 White/Orange
2 Orange/White
3 White/Green
4 Blue/White
5 White/Blue
6 Green/White
7 White/Brown
8 Brown/White
Each pair is twisted to a different degree to cut down cross talk.
I had a customer who swapped the blue and orange pairs and over about 15m it would default down to 10mbps due to the Skew effect (data arriving in the wrong order) He swapped out the connectors, then the cable and still had the same problem. Then he called me to see if I could help (cheeky git). Ran through everything he should check, got to the wiring, when he swapped the Blues & Oranges over, Bingo it worked.
Also you are better using a patch panel as that way everything "in the building" is fixed. If you break a patch lead, they are only 90p, its much easier to chuck em and plug a new one in than muck about having to reterminate and test.
Cheers
Andy
19 August 2002, 06:48 PM
#27
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Nahhh, it's
Wire1 - White wire with small orange dash's
Wire2 - Orange wire with small white dash's
Wire3 - White wire with small green dash's
Wire4 - Blue wire with small white dash's
Wire5 - White wire with small blue dash's
Wire6 - Green wire with small white dash's
Wire7 - White wire with small brown dash's
Wire8 - Brown wire with small white dash's
Just nit picking 
Wire1 - White wire with small orange dash's
Wire2 - Orange wire with small white dash's
Wire3 - White wire with small green dash's
Wire4 - Blue wire with small white dash's
Wire5 - White wire with small blue dash's
Wire6 - Green wire with small white dash's
Wire7 - White wire with small brown dash's
Wire8 - Brown wire with small white dash's
Just nit picking
19 August 2002, 06:58 PM
#28
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Ozzy mate,
Don't worry - cat5 has been laid properly - I have 2 cables going from each room to a understair cupboard (14 cables) which is already going into a patch panel. Each room has a twin cat5 wall mounted box (MK). Also there is co-ax going round the house to every room using a loftbox tv/fm distribution panel.
Will mount 7 twin MK socket boxes in the understair cupboard.
Don't worry - cat5 has been laid properly - I have 2 cables going from each room to a understair cupboard (14 cables) which is already going into a patch panel. Each room has a twin cat5 wall mounted box (MK). Also there is co-ax going round the house to every room using a loftbox tv/fm distribution panel.
Will mount 7 twin MK socket boxes in the understair cupboard.