I have CAT 3 wiring run in my house and I'm trying to add a wall jack to add internet service that we just started. I realized that the wall jack we have wasn't wired. So, I Googled and searched this forum but all the diagrams and instructions reference a CAT 3 wire colors that are different than what I find my wire. I don't know if it fairly old CAT 3 wiring or what but here are the wire colors, but I'm really confused what color wire goes were on a phone jack.
From what i googled, it sounds like this is fairly typically. Here are my wire colors and let me know if you
Cat 3 hook up any thoughts on where they connect! Orange and White 3. Solid Blue fairly light blue 5. Blue and White 6. Green and White 8. Grey and White Brown and White Find posts by jemayes. You only need two wires for the jack.
Color isn't that important. You should have pairs of wires twisted together. Using the two wires in a twisted pair is what is important. Find an unused twisted pair and use that. Traditional untwisted pair would be line1-red and green line2 black and yellow. Find all posts by ray This color combination is not common, you will probably find them twisted 2 by 2, or 4 by 4.
The total of 11 conductors leave one for e. They will probably be togeter like this: The twisting is made to reduce noise, so it is smart to keep the pairs. Thanks for the info. Well, I thought it would be a simple DIY project but then noticed the colors. The cable must be an older CAT 3 because the colors aren't normal but also the wires aren't twisted in pairs as you mentioned.
In looking around the internet for answers, it seems the twisted pairs is not as normal in the CAT 3 world. I thought it was already in use but wasn't working and when I pulled the cover, I notice it wasn't wired at all. The CAT 3 cable was cut at the floor. I assume the previous owner was starting it and didn't Cat 3 hook up. So, I should just use 2 pairs 4 wires total? Does it matter which pins the screws in the jack the pairs are Cat 3 hook up to?
Out of curiosity, what are the other wires used for? Is this the same line as other phones in your house? If so, look at how one of those jacks is connected. Find all posts by stickshift. It's odd to find in residential, but what you have is called 'trunk cable'.
It's not technically cat3, because the wire pairs aren't twisted - they are just colored in pairs for identification. Cat 3 cables do use twisted pairs, but the twist is much looser than you would see in a Cat 5 cable. Trunk cable used to be common in old office buildings that used the 5 line desk phones with the light up buttons to select the line.
That was the cable they used to connect each phone to the PBX computer. There were 5 pairs for the actual lines usually it was 4 outside lines plus an 'extension number' for in-house callingand one pair for Cat 3 hook up ringer which was controlled by the computer.
The reason the ringer was
Cat 3 hook up separately by the computer is because if you were on the phone you didn't want it ringing full blast in your ear - so the computer which could tell whether you were on phone either kept the ringer silent and just flashed the light on the button, or rang it softly.
Imagine one floor of an office building with 50 cubicles, each cubicle has one of those cables going to it. Then there's the private offices and such which also have phones.
Now imagine there's a bunch of floors. And all that wiring from all the phones on all the floors goes into a big closet where it connects to huge wiring blocks and from the wiring blocks it connects to a computer or several computers.
I've been in a few of them.
They can get really gnarly after a while from people changing things and adding things. So now you know what that cable is really "Cat 3 hook up" for. In your case it was most likely just what the installer had left on the Cat 3 hook up when your house was wired back in the day. If Cat 3 hook up strip it further back there will be a twelfth wire in there somewhere.
It would be white with brown. There was no odd number of wires or ground on this type of cable. It only came in 2, 4, 6, 12, 25, 50, and pair sizes. That said, what do you mean by adding a jack for the internet? If so, your speeds will suffer dearly using that cable. You need to make a new run of Cat 5 from that jack to where the phone lines come in on the side of the house. Cat5 can be used for phone and is recommended for phone lines that carry DSL signals because as DSK mentioned above, it helps reduce the noise on the line.
Noise affects your DSL speeds. Now if you are trying to use this jack as a network jack to bring the internet from your router to another computer, it definitely won't work.
Last edited by JerseyMatt; at Find all posts by JerseyMatt.
Thanks for all the input. I never had phone in my house and I only had 2 phone jacks in the house. My house is a house and there was Cat 3 hook up wall mounted jack that didn't work, after checking the wiring on it, it looked like it might have been original phone line connection and it was cut off in basement.
We Cat 3 hook up another "modern" jack in a bedroom but like I described it earlier, it wasn't connected. It was just stubbed up from the floor into the jack so I didn't have any working phone jacks to look for a solutions. I used Ray's comment and wired a phone jack to receive my "Cat-3" wire.
All the colors wired that differed from the typical CAT 3 really confused me. ATT, who is providing our internet service, provided a DSL converter for the phone line and a wireless hub. Thanks for all the help!
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No room for 6 gauge wire on bus bar. Getting motion sensor alarms in STAY mode. Organisms in house water. Hanging Storage Shelves from Trusses. whether a CAT3 or CAT5 RJ45 connector is used Cat 3 hook up combination with. CAT5, as long as you use the right plug for the type of wire you're. CAT3 and CAT5 wire are types of unshielded twisted pair wiring. Both types have 4 pairs of twisted wires that rely on the twisting to prevent noise.
Category 3. Strip 1/2 to 3/4 inch of insulation from each wire that you need, using the or gauge slot on the wire Cat-3 or Cat-5 Cable: Spruce Up Your Inbox!.