seeking advice - simple hardware setup for fiber run between buildings

[WhiteHawk7]

Good afternoon all! Hoping I can get some advice on hardware for what I think should be a simple fiber run:

Current setup is fiber running into an ASUS router in primary building. Looking to put in a 50-75' fiber run to a router running as an AP in a separate building (blue lines), which will be connected to a 3rd outbuilding via unifi nanostations. Fiber will be run underground in conduit. Current speeds are 100/100, and I'm not planning on increasing past 1gb in the future (I'm sure I could cry someday about my poor planning) , and at the moment just want to extend the 100/100 from primary to the 2 outbuildings: (all routers / APs are Asus AC86u, might upgrade to AX86u as I've been very happy with the ACs)

Please forgive the crude mspaint drawing =)

I believe I need:

• 2x fiber media converters (2x TP-Link MC220Ls or similar)
• 2x SFP modules
• fiber

Hoping I can get suggestions for reliable equipment that won't break the bank. I don't know much about multi-mode vs single. If there is something terribly wrong with the planned setup I'm open to advice as well.
Thank you!

 

[bbunge]

If you are just going 75 FT max CAT 5e should be good enough and less expensive than fiber. Would use the existing hardware, too. Make sure you have an extra nylon pull cord in the conduit. Then you can replace the UTP with fiber in the future or replace the UTP if it should go bad.

 

[WhiteHawk7]

If you are just going 75 FT max CAT 5e should be good enough and less expensive than fiber. Would use the existing hardware, too. Make sure you have an extra nylon pull cord in the conduit. Then you can replace the UTP with fiber in the future or replace the UTP if it should go bad.

Super sound advice - truly my only reason for wanting to go with fiber is precautionary related to lightning strikes.

I'm actually in a fairly low strike area, I just don't want to deal with the possibility of having to replace a bunch of equipment on the off-chance there is one.

 

[degrub]

If the two buildings on are separate ground rods, then fiber or point to point APs are the way to go. Ground loops between the two grounding rods will not be a good thing irrespective of lightning.

Regarding lightning, certainly use fiber or point to point, however, if there is a hit anywhere in the immediate area, the voltage level of "ground" will be elevated and may overcome any protection you have in place, including the zener diodes typically used in electronic equipment to prevent reverse current from ground when the ground voltage is elevated. And actually, you don't need a strike. Just the cloud passing over can induce opposing potential in the earth. That is what the diodes help with. Surge arrestors and filtering, usually in a UPS or a plug bar with protection will help with that.

 

[Tech9]

TP-Link EAP211-Bridge Kit is currently $115 on Amazon US. Perhaps cheap in other regions too. At small distances will do full speed link and each unit has 3x Gigabit LAN ports. May come significantly cheaper than digging for any type of wires, provides electrical separation and can be up and running literally a day after the package arrives with no need for additional hardware.

Omada 5GHz 867Mbps Indoor/Outdoor Wireless Bridge

The Omada wireless bridge, EAP211-Bridge KIT, delivers up to 867 Mbps wireless data rates and gives a long-range transmission up to 1 km. Auto-pairing and centralized management enpower your efficient deployment and management.

www.omadanetworks.com

 

[WhiteHawk7]

If the two buildings on are separate ground rods, then fiber or point to point APs are the way to go. Ground loops between the two grounding rods will not be a good thing irrespective of lightning.

Regarding lightning, certainly use fiber or point to point, however, if there is a hit anywhere in the immediate area, the voltage level of "ground" will be elevated and may overcome any protection you have in place, including the zener diodes typically used in electronic equipment to prevent reverse current from ground when the ground voltage is elevated. And actually, you don't need a strike. Just the cloud passing over can induce opposing potential in the earth. That is what the diodes help with. Surge arrestors and filtering, usually in a UPS or a plug bar with protection will help with that.

Sheesh. I was unaware of the cloud passing over scenario.

Buildings are separately grounded so that will rule out an Ethernet run. I already have conduit down that I can pull fiber through.

Any recommendations for the fiber c media converters or modules?

Thanks!

 

[degrub]

Think thunderstorm but not raining yet. Little puffy cumulus or stratus type, not so much of an effect or concern. It is rapid movement of water/ice crystals/aerosols/dirt up and down in the cloud that generates the charge in the cloud. That induces opposite charge at the surface of the earth as the cloud passes over. Similar to what happens when you get out of a car in winter and go to touch the car handle and get zapped on the hand. When that charge (voltage) becomes high enough, feelers will start developing both at the bottom of the cloud and from the earth or objects on the earth. When those feelers meet, that is when we get what is called a lightning bolt.

Don't have any specific recs for modules. Others will have to chime in as i have not dealt with them in several decades.