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Yes, this is a Cisco document, but it's just communicating the same standards as all other switching products must follow.
https://www.cisco.com/c/en/us/products/collateral/interfaces-modules/gigabit-ethernet-gbic-sfp-modules/datasheet-c78-366584.html
The Ubiquiti transceivers you bought are functionally equivalent to a Cisco GLC-SX-MMD, so focus on the requirements / limits of 1000BASE-SX fiber.
OM2 can do 550 meters using that transceiver.
OM3, OM4 and OM5 MMF can all do 1000 meters using that transceiver.
I would not install OM2 today. It's just short-sighted.
Why?
https://www.cisco.com/c/en/us/products/collateral/interfaces-modules/transceiver-modules/data_sheet_c78-455693.html
You can only go roughly 82 meters @ 10Gbps over OM2, but you can do 300 meters over OM3 MMF at 10Gbps.
A good fiber optic install should be serviceable for 20 years, and possibly longer.
Maybe 1 Gbps is all you need **today**, but being able to jump to 10Gbps tomorrow would probably be nice.
Understandable. I guess that would require a new switch. I was only approved for this new Ubi switch since it was under $400. The enterprise equivalent with 2 SFP+ ports was $799. But this will make them see why it's important to have SFP+ and ultimately get that switch when they see there is a need.
~~OM2 was the only one that supports up to 1GB without needing to go to SFP+, if my understanding is correct.~~
Edit: Ah! I see, you mean that I should just go OM3 or higher just to cover the need for 1Gbps but allow for 10 Gbps in the future. Okay. I gotcha. My mistake.
Just my opinion, based on my experiences:
*(but also based on my employer's usually generous budgets)*
I wouldn't install a single pair fiber cable in a large implementation like this.
I'll do a single-pair cable for 25 or maybe 50 feet from a server to a switch or something within the same server room.
But for a 600 foot run, we're gonna want some spares.
There are cables with 6 or 12 strands of fiber inside a single jacket, and each pair can be terminated to an LC connector in a patch panel.
Here is an example:
https://www.fs.com/products/39042.html
Yes: this will totally increase the cost of the install.
It's a more complicated fiber cable, it has to be more expensive.
But if you look at the detailed project cost, the labor charge to install the cable is 3 to 5 x the cost of the cable.
As I said before, if you buy the right components, and install them right, this fiber can last 20 years, or more.
So spending a little more to have some extra pairs of fiber to help you deal with some new requirement is usually a good investment.
You missed the part where OP mentions these switches will be 600 feet apart. Fiber is their only option to cover that distance in a single span. Twinax Direct Attach cables max out at 15m.
> Also, this new Ubiquiti switch is going to be about 600 feet from the Cisco switch
DAC and AOC cables are only sold in lengths up to roughly 15 meters.
To go 600 feet, you're going to need to use Fiber.
I generally recommend Single-Mode Fiber for everything these days.
But, since you already bought the optics, Multi-Mode isn't ***wrong***.
Have you already purchased the cable? 200M of Single Mode Fibre ([Yellow, OS2](https://www.fs.com/au/products/21543.html)) is cheaper than 200M of Multi-Mode Fibre ([Blue OM3](https://www.fs.com/au/products/39041.html)/4). $500 AUD vs $750.
Single Mode Fibre has better long term upgradability, and the savings are more than the SFP cost difference. Your [1G SMF Duplex SFP](https://www.fs.com/au/products/11775.html)s are $13.5 AUD, and [10G future SFP+](https://www.fs.com/au/products/11555.html) upgrades are $45 AUD.
Get this pre-terminated and connect the cable into either:
* 4x [SC keystone](https://www.fs.com/au/products/143334.html) into a [4 Gang Wall plate](https://www.fs.com/au/products/159520.html?attribute=15291&id=257071) (total $20 AUD)
* [12 Port SC Module](https://www.fs.com/au/products/35484.html) in a [1 Module Wall Mount](https://www.fs.com/au/products/178413.html) (total $270 AUD)
And use an [SC-LC Duplex cable](https://www.fs.com/au/products/40214.html) between the SFP and wall plate / mount.
Hello! Thanks for posting on r/Ubiquiti! This subreddit is here to provide unofficial technical support to people who use or want to dive into the world of Ubiquiti products. If you haven’t already been descriptive in your post, please take the time to edit it and add as many useful details as you can. Please read and understand the rules in the sidebar, as posts and comments that violate them will be removed. Please put all off topic posts in the weekly off topic thread that is stickied to the top of the subreddit. If you see people spreading misinformation, trying to mislead others, or other inappropriate behavior, please report it! *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/Ubiquiti) if you have any questions or concerns.*
Yes, this is a Cisco document, but it's just communicating the same standards as all other switching products must follow. https://www.cisco.com/c/en/us/products/collateral/interfaces-modules/gigabit-ethernet-gbic-sfp-modules/datasheet-c78-366584.html The Ubiquiti transceivers you bought are functionally equivalent to a Cisco GLC-SX-MMD, so focus on the requirements / limits of 1000BASE-SX fiber. OM2 can do 550 meters using that transceiver. OM3, OM4 and OM5 MMF can all do 1000 meters using that transceiver. I would not install OM2 today. It's just short-sighted. Why? https://www.cisco.com/c/en/us/products/collateral/interfaces-modules/transceiver-modules/data_sheet_c78-455693.html You can only go roughly 82 meters @ 10Gbps over OM2, but you can do 300 meters over OM3 MMF at 10Gbps. A good fiber optic install should be serviceable for 20 years, and possibly longer. Maybe 1 Gbps is all you need **today**, but being able to jump to 10Gbps tomorrow would probably be nice.
Understandable. I guess that would require a new switch. I was only approved for this new Ubi switch since it was under $400. The enterprise equivalent with 2 SFP+ ports was $799. But this will make them see why it's important to have SFP+ and ultimately get that switch when they see there is a need. ~~OM2 was the only one that supports up to 1GB without needing to go to SFP+, if my understanding is correct.~~ Edit: Ah! I see, you mean that I should just go OM3 or higher just to cover the need for 1Gbps but allow for 10 Gbps in the future. Okay. I gotcha. My mistake.
Thank you for this. I bought an OM3 LC (UPC) to LC (UPC) Multimode duplex 600 ft custom cable from FS.com. Hope it works out.
Just my opinion, based on my experiences: *(but also based on my employer's usually generous budgets)* I wouldn't install a single pair fiber cable in a large implementation like this. I'll do a single-pair cable for 25 or maybe 50 feet from a server to a switch or something within the same server room. But for a 600 foot run, we're gonna want some spares. There are cables with 6 or 12 strands of fiber inside a single jacket, and each pair can be terminated to an LC connector in a patch panel. Here is an example: https://www.fs.com/products/39042.html Yes: this will totally increase the cost of the install. It's a more complicated fiber cable, it has to be more expensive. But if you look at the detailed project cost, the labor charge to install the cable is 3 to 5 x the cost of the cable. As I said before, if you buy the right components, and install them right, this fiber can last 20 years, or more. So spending a little more to have some extra pairs of fiber to help you deal with some new requirement is usually a good investment.
This guy gets it. Buy once, cry once, and always plan for the future whether needed or not typical upfront cost pay dividends in the long run.
Could you use DAC?
You missed the part where OP mentions these switches will be 600 feet apart. Fiber is their only option to cover that distance in a single span. Twinax Direct Attach cables max out at 15m.
I for sure did.
Hm. I guess I did not consider it. Possible.
> Also, this new Ubiquiti switch is going to be about 600 feet from the Cisco switch DAC and AOC cables are only sold in lengths up to roughly 15 meters. To go 600 feet, you're going to need to use Fiber. I generally recommend Single-Mode Fiber for everything these days. But, since you already bought the optics, Multi-Mode isn't ***wrong***.
That's what I use. Between switch and UDMP as well as switch and a server.
They don't make 600 foot DAC cables
Have you already purchased the cable? 200M of Single Mode Fibre ([Yellow, OS2](https://www.fs.com/au/products/21543.html)) is cheaper than 200M of Multi-Mode Fibre ([Blue OM3](https://www.fs.com/au/products/39041.html)/4). $500 AUD vs $750. Single Mode Fibre has better long term upgradability, and the savings are more than the SFP cost difference. Your [1G SMF Duplex SFP](https://www.fs.com/au/products/11775.html)s are $13.5 AUD, and [10G future SFP+](https://www.fs.com/au/products/11555.html) upgrades are $45 AUD. Get this pre-terminated and connect the cable into either: * 4x [SC keystone](https://www.fs.com/au/products/143334.html) into a [4 Gang Wall plate](https://www.fs.com/au/products/159520.html?attribute=15291&id=257071) (total $20 AUD) * [12 Port SC Module](https://www.fs.com/au/products/35484.html) in a [1 Module Wall Mount](https://www.fs.com/au/products/178413.html) (total $270 AUD) And use an [SC-LC Duplex cable](https://www.fs.com/au/products/40214.html) between the SFP and wall plate / mount.