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Old 07-29-2014, 11:09 AM   #1
taquinas
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Connecting a router and a computer with a telephone line.


I have a wifi router that doesn't reach the room with my htpc (brick walls). There is a phone line installed in the walls from the router to the htpc.
Is there a way to connect the router to the pc with the help of the phone line?
 
Old 07-29-2014, 12:17 PM   #2
EDDY1
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Is this a second router?
 
Old 07-29-2014, 12:20 PM   #3
michaelk
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Possibly, in the US newer homes typically use CAT 3 wire for telephones. The old style telephone wiring does not have the proper twists per inch so can't say how reliable or what speed you might achieve. Another option is powerline adapters.
 
Old 07-29-2014, 12:26 PM   #4
taquinas
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No. Just the one. If I clarify further I just want to be able to convert RJ45 to RJ11 and back to transfer data from the router to the pc.
 
Old 07-29-2014, 12:38 PM   #5
taquinas
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Speed is irrelevant. Can a connection be established from the router RJ45 ---> phone line RJ11 ---> PC RJ45? Is there an adapter that I can use to make this possible?
 
Old 07-29-2014, 12:44 PM   #6
szboardstretcher
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Possibly. How many pairs do you have,.. or rather,.. how many wires do you have to work with in the phone cable?

There is also the power/lan thing:

http://www.amazon.com/Ethernet-over-.../dp/B004C4XWN2
 
Old 07-29-2014, 12:45 PM   #7
michaelk
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In addition... Depends on the age of the house but all of the telephone wiring at the other end might be located in a locked central box outside the house which is technically only accessible by the telephone company. Is it really a direct wire?

If it isn't CAT 5 it probably will not work at all. Pull out off the cover plate and post the number of wires and colors.

Last edited by michaelk; 07-29-2014 at 01:03 PM.
 
Old 07-29-2014, 02:00 PM   #8
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You could try ethernet over power lines. The necessary units are relatively inexpensive and pretty easy to set up. Throughput is pretty good if the two units are on the same electrical circuit. It works if they're not on the same circuit but not nearly as well; good enough for general internet browsing though.

Also, check out the HomePNA group(HPNA):

http://en.wikipedia.org/wiki/HomePNA

They are an industry group dedicated to doing ethernet over existing telephone lines and coaxial cables typically used by cable companies. If you have ATTUverse, their cable boxes come with an ethernet port on the back that use this technology. Any room with a TV and thus a cable box can have wired ethernet access to the internet just by hooking into this rear ethernet port. Most of the HPNA devices seem to be for using coaxial cable rather than telephone lines and they are pretty expensive:

http://www.google.com/#q=homepna+net...vices&tbm=shop

Especially when compared to ethernet over powerline devices:

http://www.newegg.com/Product/Produc...=-1&isNodeId=1
 
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Old 07-29-2014, 03:20 PM   #9
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You can use the wire as long as you disconnect it from any other service. You can't easily use it when phone (POTS) is active. If inactive even some very old wiring will work. Nic's will set up q and adjust for poor speeds or you can just set to 10.

I'd just go out and buy $25 pair of powerline adapters. I've used them for years.

Last edited by jefro; 07-29-2014 at 03:21 PM.
 
Old 08-01-2014, 04:35 AM   #10
taquinas
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Thanks a lot for your suggestions. POE is not possible because of different circuits/phases being involved.

I did manage to connect the two pair phone line in the wall using RJ45 connectors at both ends to the computer and my router. It's supposed to be a 10baseTx connection using only 1,2,3,6 pins. I found this on another forum. I used ethtool to drop the speed of my built-in NIC to 10 duplex full.
I am supposed to get atleast 9 MBits connection. But I don't. I get lots of dropped packets pinging the router. 75% or more.

ifconfig idicates an equal number of errors and and overruns. And they increase whenever I send and receive packets like in apt-get which also takes forever.

I am in Asia. My bandwidth speed is 1MB which is slow but I do get volume.

Are the errors and overruns due to packet size? But then ping size is about 64K.

Thanks in advance,
 
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Old 08-01-2014, 07:08 AM   #11
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You never posted any information about the phone wiring? If the wiring isn't at least CAT 3 quality then you can not assume your supposed to get any particular Mb/s.

Is the phone wire twisted pairs? If so make sure that wires connecting 1,2 and 3,6 are on the same pair. If the wire is not in separate pairs, does not have enough twists per inch or not wiring the pairs correctly will cause packet loss.

Lowering the MTU might help but if the wiring isn't suitable there isn't anything you can do.

By the way 10 and 100Base-T only use 4 wires.
 
Old 08-01-2014, 03:03 PM   #12
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In almost every US home the phone company always installed 4 wires to each box. Not sure what they did in Asia. You can sometime use - side common and get by with three wires.

If you only have two good wires then get a modem/adapter. They convert ethernet to serial. Usually they are kind of expensive but work good if your wiring isn't too bad. We've use those to maintain a system left over from ATT unix times.

Last edited by jefro; 08-01-2014 at 04:18 PM.
 
Old 08-02-2014, 09:35 AM   #13
taquinas
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I tested my connections of the cat3 wires to RJ45 jacks and found that, I had crosswired one of the wires. I found my error by checking them for continuity using a 9V battery and a multimeter.

I'm totally relieved. I saved a bunch of money and, I got to use my existing wiring. The learing experience is even better.

I still get a few errors so I will look into lowering the MTU.

A big thanks to everyone.

You guys rock.

Last edited by taquinas; 08-02-2014 at 09:50 AM. Reason: re-posting
 
Old 08-02-2014, 02:37 PM   #14
linuxbird
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Quote:
Originally Posted by taquinas View Post
I tested my connections of the cat3 wires to RJ45 jacks and found that, I had crosswired one of the wires. I found my error by checking them for continuity using a 9V battery and a multimeter.

I'm totally relieved. I saved a bunch of money and, I got to use my existing wiring. The learing experience is even better.

I still get a few errors so I will look into lowering the MTU.

A big thanks to everyone.

You guys rock.
I have 4 lead phone wire everywhere in my house. CAT 5 wasn't invented when I built it in my youth. The thinking then was to run coax to every room. Since then I have run CAT 5 to many rooms, however the idea of being able to utilize the phone lines is tempting. About a decade ago, the twisted pair got disconnected, and have been used for nothing since.
 
Old 08-02-2014, 05:22 PM   #15
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You don't lower MTU. You lower speeds on nic or may even try half duplex.
 
  


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