Ethernet-Compatible Telephone Cable?

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captainflight92 Posted messages 2 Status Membre -  
 JennyB -
Hello,

I am moving into my new house, and I want to connect two or three computers to my ADSL box via ethernet network. The problem is that it is almost impossible for me to run a new cable between the different rooms of the house. However, there are already telephone sockets available.

My question is: can I use the existing telephone cable to put RJ45 ethernet connectors and link everything together? Are the characteristics of telephone and ethernet cables the same? (amperage, diameter, etc.)

Thank you in advance.

4 réponses

cocoche95 Posted messages 1187 Status Contributeur 543
 
Hi!

Telephone cables are not designed to handle Ethernet traffic, so no, you can't!

However, you can remove the telephone cables and replace them with Ethernet cables (you can take advantage of the conduit already in place)!

There you go!
32
RR
 
Hello, 2019... it's 11 years after the first post...

Old construction, replacing a telephone cable with Ethernet is sometimes impossible.
After connecting the telephone cables one by one with an Ethernet jack, the network did not work with a direct connection; however, if after the wall socket (configured as RJ45):
- connecting a router works as it can interpret data exchanges
- adding a switch doesn’t work, as it only passes the data through
- adjusting the network card to 10Mbits and limiting Tx/RX speed (depending on the network card): It works very well. Exactly like captainflight92, he answered himself (thanks by the way, it helped me understand what was going on with my cables/walls ;-)

I can confirm that having done it today, using old telephone cables is possible and less risky than pulling new cables... though the speed is limited for sure... but even for YouTube it’s fine.

RR
-1
Guytwo72 > RR
 
Hello,
I am following up on this topic because I have installed RJ45 sockets at both ends of a telephone line that has been in the walls for 40 years (non-shielded line). At one end, I connected my SFR box, and at the other (about 25 meters away), I connected my computer. The result is that it doesn't work... I forgot to mention that on the RJ45 I only connected the two Ethernet pairs (1 and 2... 3 and 6). Should I connect the other two pairs (telephone and television)? If so, why? Thank you. Best regards, Guytwo 72
1
brupala Posted messages 111925 Registration date   Status Membre Last intervention   14 416 > Guytwo72
 
Hi,
Since you have 4 pairs and 8 positions, you might as well wire the 4 pairs.
Are these male plugs or female wall sockets?
-1
JennyB > RR
 

Hello,
A few years later and faced with the same issue, I put RJ45 connectors at each end of the cable (I connected the 4 pairs) and there you go! I'm achieving a speed of 100Mbps for a length of about a hundred meters. For an unshielded PTT298 cable that was installed ages ago, it’s really not bad at all.
Two powerline adapters saved and just as much money :)

1