Communication run 1300 feet

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IIRC 1500' shouldn't be a problem on 62.5 fiber bumping up to 1310nm instead of 850. Plus, I think there are three different types of 50µm multimode and distance increases from one type to another. It has been a while.
 
It's a waste to install copper between buildings anymore. SM fiber is actually much cheaper than MM. It used to be the electronics for singlemode fiber were much more expensive, so multimode was installed for runs up to 300 meters. The limits of SM fiber have yet to be found. The electronics are the bottleneck. Multimode gets expensive if you want to push 10gig. You can buy 1 gig SM convertors for $60 on Amazon these days. 5 years ago they would cost $800.

Preterminated fiber with pulling eyes and some media convertors makes more sense. T-BASEXX is cheap, but POTS convertors may still be ridiculous. They are becoming relics.
 
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Just to discuss, Disconnected the wiring at both ends. And Check 1 wire to ground. Get 127 volts DC to ground on the cable disconnected. Is this Harmonics from FLourecents. Is Harmonic DC or AC. Good question.

I would tend to believe its DC. Even though its a oscilatting system.
 
JohnGalt said:
It's a waste to install copper between buildings anymore. SM fiber is actually much cheaper than MM. It used to be the electronics for singlemode fiber were much more expensive, so multimode was installed for runs up to 300 meters. The limits of SM fiber have yet to be found. The electronics are the bottleneck. Multimode gets expensive if you want to push 10gig. You can buy 1 gig SM convertors for $60 on Amazon these days. 5 years ago they would cost $800.

Preterminated fiber with pulling eyes and some media convertors makes more sense. T-BASEXX is cheap, but POTS convertors may still be ridiculous. They are becoming relics.
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John,

If their is Existing Fiber their that is being used for other stuff. Can I use some of it and put in a system. What would someone have to do. ( Materials, Splitters.) Due to my inexperience. A very detailed explanation would be appreciated. I like to learn all aspects of our work.
 
All this fiber talk seems like overkill, given that everything I've read indicates we're talking about a single POTS telephone (fax) line running on an improperly installed 25-pair cable. Why spend thousands on fiber plus thousands on POTS>fiber media converters when all that should be needed is some good, properly installed, shielded, underground phone wire. Heck, 4-pair might even be enough, as I still haven't seen anything indicating there are multiple devices.

Fordean said:
John,

If their is Existing Fiber their that is being used for other stuff. Can I use some of it and put in a system. What would someone have to do. ( Materials, Splitters.) Due to my inexperience. A very detailed explanation would be appreciated. I like to learn all aspects of our work.
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If you do in fact have fiber available, it might be possible. If there is spare "dark" fiber then you'd want something like this to run one phone line (about $2400 for a FXO/FXS pair over multimode fiber)

Alternatly, if there isn't any spare fiber but they're using it for something normal like ethernet, then you'd want something like this (at least $1000, can't find actual pricing) I'd shy away from cheaper VoIP-based telephone-over-ethernet systems as there are often issues with faxes over VoIP.
 
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