Effectiveness of Short Run of Fiber Optic Cable.

kennyb123

Well-Known Member
Nov 30, 2012
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Kirkland, WA
Attenuation at 1310nm is .5dB or less per km. So unless you’re coiling up kilometers of cable it’s essentially nothing.

I wrote that “coiling has been shown to increase attenuation“. Increase above the number you referenced.
 

tony22

Active Member
Nov 4, 2019
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I would be using multimode SX optics which are designed for shorter range in building networks. Or, I would be putting a 5dB or 7dB attenuators on the single mode setup.

Hi @djsina2. I know your post is just a bit back in time, but I wonder if you could recommend such an SFP for my Edgerouter 4. And if possible, is there a matching media converter I could use on the coax out of my Arris SB8200 cable modem? I’d like to break the copper link as soon as possible in my house. I’ve been told that in Florida a good lightning hit can take out a good chunk if not all of a home copper network infrastructure.
 

djsina2

Well-Known Member
May 31, 2019
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Hi @djsina2. I know your post is just a bit back in time, but I wonder if you could recommend such an SFP for my Edgerouter 4. And if possible, is there a matching media converter I could use on the coax out of my Arris SB8200 cable modem? I’d like to break the copper link as soon as possible in my house. I’ve been told that in Florida a good lightning hit can take out a good chunk if not all of a home copper network infrastructure.

You could get these:

https://www.fs.com/products/75332.html
https://www.fs.com/products/40180.html

For the vendor compatibility you should choose generic.

I'm not sure what you mean about the media converter? The input of your SB8200 is coax and needs to remain so.
 

tony22

Active Member
Nov 4, 2019
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I'm not sure what you mean about the media converter? The input of your SB8200 is coax and needs to remain so.

Sorry. I meant the Ethernet output. :)

I was itching to get this done :D, so I got one of these

https://www.amazon.com/gp/product/B00U77VPX2/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

It looked good. I also got one of these for the SB8200 side

https://www.amazon.com/gp/product/B07DWXXTT9/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

With the appropriate ST to LC 50/125 um patch cable. Should have it all today.
 
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