25M cable to connect anothe building? is it possible

[lionsl2005]

Hi

we have to give internet connection to another part of building. distance is 25M. is it possible via a network cable of that lengths?

[RabbieBurns]

Cat 5 will run up to 100m.

 

However there is things to consider if you are connecting via copper eg if each building is on a separate mains supply etc.

 

Ill let others elaborate.

 

edit: the title says another building, post says another part of building.. not sure which it is ?

[CyberNerd]

consider running more than one cable (or multicore fibre) for aggregated links - you never know when you'll need redundancy and more bandwidth

[SC-UK]

When running cable externally between two buildings it's always better to use Fibre rather than copper cable. If the two buildings are likely to be on two different electricity phases, or the cable gets struck by lightning you are in for a whole world of hurt - sometimes literally!

 

Tom

 

I should note - two different electricity phases won't ordinarily be a problem, but if something goes wrong with one of the devices on either end you will end up with a PD of nearly 500V.

[Andrew_C]

The two phase thing is really a red herring. Yes there is a problem, but that isn't it!

 

If you have a rare, but serious fault in one building, you can end up with your cable carrying significant voltages to the earth in the second building through your expensive kit. This is considered to be "a bad thing".

 

As others have said, fibre is much better.

[Dos_Box]

Maybe a wireless bridge would be in order to save digging if no conduit is in place?

[lionsl2005]

Im sorry its not part of the building another building part of the school.

Cat 5 will run up to 100m.

 

However there is things to consider if you are connecting via copper eg if each building is on a separate mains supply etc.

 

Ill let others elaborate.

 

edit: the title says another building, post says another part of building.. not sure which it is ?

[lionsl2005]

Maybe a wireless bridge would be in order to save digging if no conduit is in place?

 

How do i do a wireless bridge?

[gizmo2005]

How do i do a wireless bridge?

 

How to Set Up a Wireless Bridge hope this help you, maybe some night time reading for you

 

1.The first step involves the manual configuration of the IP address. For this purpose, open the Control Panel / Network Connections / Local Area Connection / Properties, and click on the Properties of Internet Protocol (TCP / IP). Set the IP address as 192.168.1.2, Subnet Mask as 255.255.255.0, and Default Gateway as 192.168.1.1.

 

2.Using an internet browser, connect to the router. Click Wireless / Basic Settings, and select the 'Client Bridge'. Set the 'Wireless Network Mode' according to the primary router.

 

3.For the security purpose, click Wireless / Wireless Security and select WEP, WPA or WPA2.

 

4.Select the Status/Wireless option and click on the button labeled 'Site Survey'. Now associate the router to the primary one, in order to create the bridge. To do so, click the 'Site Survey' button and the 'Join' button to create the association with the available wireless network.

 

5.The bridge is now complete and can be easily tested by setting the IP address back to automatic assignment, unplugging the network cable from the PC and reconnecting. After doing so, the PC should receive an IP address assigned by your primary router.

 

6.If the PC does not receive an IP address from the primary router, it implies that the bridge is not working. In such case, re-check the working of the secondary router and check out whether the primary router is configured to use MAC address filtering, as a secondary form of security.

 

 

Edited September 1, 2010 by gizmo2005

[CyberNerd]

How do i do a wireless bridge?

 

5GHz Point to Point:

 

Ubiquiti NanoStation M5 AirMax AP/CPE 5Ghz - Ubiquiti NanoStation M5

[dhicks]

is it possible via a network cable of that lengths?

 

As others have pointed out, CAT5 will run for 100m but isn't really suitible for joining two buildings, fibre is better. Installing a fibre cable isn't nearly as complicated / expensive as you initially think it is - simply buy a pre-terminated bit of fibre of the appropriate length (around £100) and two transceivers to install in the switches at each end of the connection (another £100 each). 8-strand pre-terminated fibre isn't really expensive, so you have loads of potential bandwidth free for future upgrades once you've put the cable in.

 

--

David Hicks

[mpe]

The two phase thing is really a red herring. Yes there is a problem, but that isn't it!

 

Otherwise it would be rather difficult to network a building with a 3 phase supply.

 

The only obvious situation where there's such an issue is using network over mains which signals between phase and neutral. (The alternative of signalling between earth and neutral dosn't have this problem.)

 

If you have a rare, but serious fault in one building, you can end up with your cable carrying significant voltages to the earth in the second building through your expensive kit. This is considered to be "a bad thing".

 

UTP cable shouldn't have any of the conductors connected to earth in the first place. With STP and co-axial cable only one end should ever be earthed.

[DMcCoy]

5GHz Point to Point:

 

Ubiquiti NanoStation M5 AirMax AP/CPE 5Ghz - Ubiquiti NanoStation M5

 

Now using 3 pairs of these for wireless bridges, very good apart from not using dhcp for the inital ip (configure *before* they go on the wall!)