After yesterdays winds we've got some damage to a walkway which houses some of my fibers. It will possibly have to come down so I have been asked to give them a rough price. So what do you reckon;
1 cable which has 2 pairs connected and possibly 2 more pairs unused.
Another cable which has 1 pair connected and possibly 3 more pairs unused.
The cables will need to be extended by around 80-100 meters therefore 2 splices on each core, 16 cores in total. Also it will run externally around the buildings so will need some exterior grade trunking.
Also can anyone explain this statement
We might end up mighty close to the lower 220m limitThe standard specifies a distance capability between 220 metres (62.5/125 µm fiber with low modal bandwidth) and 550 metres (50/125 µm fiber with high modal bandwidth). In practice, with good quality fiber and terminations, 1000BASE-SX will usually work over significantly longer distances.
Last edited by j17sparky; 24th May 2011 at 09:00 AM.
You have a cabling contractor you use? ask them.
£2000 including the extra fibre
Will be asking but atm they just want to work out roughly if it will be cheaper to repair the walkway or pull it down and rerun the cables. Don't really want to get quotes in atm as they will pester you all the time.
It's basically saying that 62.5/125 µm fiber is capable of 220m @1000Mbps SX max and 50/125 µm fiber is capable of 550m @1000Mbps SX max. Basically you should run all new links with 50/125 µm fiber. Most newer fiber modules can auto select between 62.5/125 and 50/125 µm fiber.The standard specifies a distance capability between 220 metres (62.5/125 µm fiber with low modal bandwidth) and 550 metres (50/125 µm fiber with high modal bandwidth). In practice, with good quality fiber and terminations, 1000BASE-SX will usually work over significantly longer distances.
50/125 µm OM3 (blue) fiber can also support 10Gbps upto 300m on newer high end core switches. Make sure you look closely at what fiber you're using. You can run 10Gbps on 50/125 µm OM2 (orange), but distances are limited. Sometimes it can be tricky and older installations may use out of date colour coding.
I recently paid our local contractor £450 to fusion splice a broken 4 core 50/125 after a rodent chewed through it.
So I would say @plexers £2k is about right. The cost of the fibre itself isn't the problem it's the splicing that your paying for.
Watch out for the cowboys, there are a lot of them out there the Amphenol Cold Crimp method is something most of us can do with a bit of practise and a cheap kit and some ends.
They cold crimp SC connectors and join the fibres with a coupler which can have up to 3db loss, then pot the lot in compound.
I have seen some diabolical repair work recently. I have a photo in my phone from one last week I'll upload it in a mo.
Cheers people. I told the powers that be what the rough cost would be and they have opted to repair the walkway. Saves me some hassle so suits me - until the workies accidentally cut through the fibre that is!
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