I'm setting up a lan and that's not a problem. The problem is another computer that is in a different building about 250 meters away.
We would like this computer to be on the ethernet lan, but I think it's too far away for UTP. Can you setup 2 modems directly connect with a standard phone line? ie: not going through the telephone system.
On another topic, could somebody give me a hand with my ftp server problem? See earlier posting from Monday.
Thanks.
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I wouldn't set it up with twisted pair, and a null modem solution would be both slow and unreliable. The best thing to do would be to either 1: Use COAX to run the 250 meters, I believe COAX is rated to 300 meters or something, or 2: (preferred) Use a fiber optic line to run that distance.
> -----Original Message----- > From: Kurt Neufeld [mailto:kneuf...@verity.com] > Sent: Wednesday, January 13, 1999 1:43 PM > To: linux-...@vger.rutgers.edu > Subject: Lan/Wan
> I'm setting up a lan and that's not a problem. The problem is another > computer that is in a different building about 250 meters away.
> We would like this computer to be on the ethernet lan, but I > think it's too > far away for UTP. Can you setup 2 modems directly connect > with a standard > phone line? ie: not going through the telephone system.
> On another topic, could somebody give me a hand with my ftp > server problem? > See earlier posting from Monday.
> Thanks.
> - > To unsubscribe from this list: send the line "unsubscribe > linux-net" in > the body of a message to majord...@vger.rutgers.edu
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> I'm setting up a lan and that's not a problem. The problem is another > computer that is in a different building about 250 meters away.
> We would like this computer to be on the ethernet lan, but I think it's too > far away for UTP. Can you setup 2 modems directly connect with a standard > phone line? ie: not going through the telephone system.
Look in to 10baseFX and 100baseFX. These are the standard fiber optic protocols for extending ethernet across long distances. Be prepared, fiber devices and fiber itself costs a lot more than copper.
Alternatively, I highly recommend "Tux boxes" by "Tut Systems":
You may also want to look into the Pairgain line of Products -- The Megabit Modem product line is great -- the only problem is that you're limited to 768kbps, but if you were contemplating a modem solution, this is likely not a problem.
You can pick up a set of MM 768's for around $2000.00. They can be configured to act as a bridge, or you can use the built in routing functions (though they are limited.) I've used them with great success -- easy to install, and once they're up, they stay up. They operate over 1 copper pair..
> I wouldn't set it up with twisted pair, and a null modem solution would be > both slow and unreliable. The best thing to do would be to either 1: Use > COAX to run the 250 meters, I believe COAX is rated to 300 meters or > something, or 2: (preferred) Use a fiber optic line to run that distance.
> "How could this be a problem in a country where we have Intel and > Microsoft?" - Al Gore on Y2K
> > -----Original Message----- > > From: Kurt Neufeld [mailto:kneuf...@verity.com] > > Sent: Wednesday, January 13, 1999 1:43 PM > > To: linux-...@vger.rutgers.edu > > Subject: Lan/Wan
> > I'm setting up a lan and that's not a problem. The problem is another > > computer that is in a different building about 250 meters away.
> > We would like this computer to be on the ethernet lan, but I > > think it's too > > far away for UTP. Can you setup 2 modems directly connect > > with a standard > > phone line? ie: not going through the telephone system.
> > On another topic, could somebody give me a hand with my ftp > > server problem? > > See earlier posting from Monday.
> > Thanks.
> > - > > To unsubscribe from this list: send the line "unsubscribe > > linux-net" in > > the body of a message to majord...@vger.rutgers.edu
> - > To unsubscribe from this list: send the line "unsubscribe linux-net" in > the body of a message to majord...@vger.rutgers.edu
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I use a pair of these to extend some ethernet to a warehouse across a street. It works.
Tip # 1 Measure the resistance of the pair you intend to use before buying the system. Your copper may be too long.
When it works, its magic.
-- "I want to say one thing to the American people. I'm going to say this again. I did not have sexual relations with that woman, Miss Lewinsky. I never told anybody to lie. Not a single time. Never. These allegations are false and I need to go back to work for the American people." - President Clinton, January 26, 1998.
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On Wed, 13 Jan 1999, Ryan Walker wrote: > You may also want to look into the Pairgain line of Products -- The > Megabit Modem product line is great -- the only problem is that you're > limited to 768kbps, but if you were contemplating a modem solution, this > is likely not a problem.
I like the Tut Systems boxes better. XL-2412 goes up to 1.152mbit. They should also be cheaper than the Pairgain units.
-Dan
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On Wed, 13 Jan 1999, Gregory P. Smith wrote: > Look in to 10baseFX and 100baseFX. These are the standard fiber optic > protocols for extending ethernet across long distances. Be prepared, > fiber devices and fiber itself costs a lot more than copper.
You can also go with 1000baseSX. I have a setup with a PowerRail 1000 routing switch. It's got 20 10/100 ports and 2 1000SX ports. You can do between 275m (62.5/125um) and 550m (50/125um) depending on the multimode fiber type you use. Packet Engines also has some 1000SX boxes that let you do about 100km though I doubt your other computer is that far!
Nick
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Try a pair of BreezeCom AP10+SA10 radio modems, 3 Mbit/s microwave modems, direct ethernet conect, bridginng every protocol you need ( tested with TCP/IP, NetBEUI, IPX), SNMP manageable, IEEE 802.11 compliant and also on the Pro models a nice voice channel along data. We use this beasts here on a much longer distance for about 1 year and works flawlessly. And did I mention it is VERY PnP with Linux, you just plug the cable and that's all... ;), a rare thing this days when every thing is about to become windozed :(.
> I'm setting up a lan and that's not a problem. The problem is another > computer that is in a different building about 250 meters away.
> We would like this computer to be on the ethernet lan, but I think it's too > far away for UTP. Can you setup 2 modems directly connect with a standard > phone line? ie: not going through the telephone system.
> On another topic, could somebody give me a hand with my ftp server problem? > See earlier posting from Monday.
> Thanks.
- To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majord...@vger.rutgers.edu
> I wouldn't set it up with twisted pair, and a null modem solution would be > both slow and unreliable. The best thing to do would be to either 1: Use > COAX to run the 250 meters, I believe COAX is rated to 300 meters or > something, or 2: (preferred) Use a fiber optic line to run that distance.
Besides the other good suggestions, there's nothing wrong with coax as long as you take appropriate electrical precautions against ground-loops, induced EMP from lightning strikes, making sure ground in both building is equal to earth (ideally) etc. Given the cost of multimode fiber and media converters, why worry about all of the above??? Put in fiber. Before you know it they'll be 4 computers in the other building anyway! :-)
.......Bill Sneed, Prospect, Maine........
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>I'm setting up a lan and that's not a problem. The problem is another >computer that is in a different building about 250 meters away.
>We would like this computer to be on the ethernet lan, but I think it's too >far away for UTP. Can you setup 2 modems directly connect with a standard >phone line? ie: not going through the telephone system.
>On another topic, could somebody give me a hand with my ftp server problem? >See earlier posting from Monday.
>Thanks.
I have setup a lan segment with 300meters with good Coaxial Cable with 10base2 adapters or from hub to hub.
Regards.
Luis Forra ---
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