Networking between 2 buildings?

[krisd32]

just had a request to find out what is the best way to communicate between 2 buildings, there is only a 10m gap or so between them so i was askin for advice on what would be the fatest way to do this?

[Geoff]

Fastest way would be a trench and fibre.

[plexer]

How many computers in the other building?

As it's only 10m throw some cat5 across the gap <--- joke

 

Laser probably your best bet if you don't want to run a fibre across there.

 

Ben

[plexer]

But by fast do you mean installation speed or speed of the resulting link?

 

Ben

[ChrisC]

I would of said that, are the buildings already there or is it a new build?

*By that I mean fibre*

 

Also, is the 10m gap not counting the disatance to the nearest switch etc?

 

Chris

[Dos_Box]

Fibre gets my vote too.

[Jake]

Fibre or External cat5 would be my choices

[Geoff]

As it's only 10m throw some cat5 across the gap

 

That'd would cause a ground loop.

[StewartKnight]

external CAT5 shouldn't be used to join 2 building together

[plexer]

Yes which is why the answer was

 

As it's only 10m throw some cat5 across the gap <--- joke

 

I wouldn't advocate external or internal grade cat5 as a solution to bridge buildings ever as I've said in previous topics on this subject.

 

Ben

[Disease]

Why?

[ChrisC]

We have fibres hanging from the roofs of all the buildings here.....

 

Chris

[Jake]

Thats why I said they would be *my* choices

[krisd32]

I thought fibre would be the choice! the building was put up about 5 years ago or so, there will only be about 3 sockets for teachers only going in as it is only a small building! what are the speeds like with a wireless bridge between them? the nearest cabinet to that point is quite a distance thinking about it!

[Geoff]

Why?

 

As I said, you'd get a ground loop as the buildings aren't electrically connected. Net result is really bad SNR on the data connection.

[everton4europe]

Fibre.

 

But is there a route between the two buildings already in place. I had simular at a school and used an existing telecoms trench.

[plexer]

Don't even think about wireless unless you want more headaches to contend with.

 

The most reliable solution is to install a fibre between them.

 

You could look into a laser system. Best bet is to get your local cabling firm to come and do a survey for you and make some recommendations based on the buidlings.

 

@Disease: Well using copper between the 2 buildings would create a ground loop probably as has allready been said. But the less copper cabling you have running external the less chance of lightning strike etc... I know BT run copper all over the world but that their choice and telephone provision is different to data provision.

 

Ben

[Disease]

So when would you use External Cat5E then or i that a product on the market that is totally useless?

[Geoff]

when you had to run cable from one part of the same building externally. eg, from one floor to another.

[Jake]

I cant find anything on google about external catv specifically causing ground loops. Have you got some links regarding ground loops? Would like to know a bit more about them and ext catv

[Guest]

Another vote for fibre

[Blanka]

* Attaches some CAT5 cable to end of Harpoon Gun, takes Aim and FIRE! *

[plexer]

If you have a switch in one building plugged into the mains and a switch in another connected to the mains joined by copper cable you have the possibility of a ground loop due to the buildings different earthing points.

 

Joining the 2 switches with fibre gets rid of this effect due to the nature of a fibre optic.

 

Ben

[plexer]

http://www.epanorama.net/documents/groundloop/basics.html

http://www.epanorama.net/documents/groundloop/datacom_isolation.html

 

Ben

[Jake]

I suppose that makes sense.

 

So...assuming that budgets were tight, and wireless wasnt an option. Is there no alternative whatsoever to fibre?