Earlier quoted context omitted.
It's definitely not something to trust in, but intercepting (at a layer 1 level) a PTP 80 GHz link is actually harder than tapping fiber. You'd have to have Rx equipment either directly in the path or directly behind both ends of the radio link. As compared to the effort required to cut an aerial or underground singlemode cable and fusion splice in place a passive prism split tap (basically the same thing as insertin…
I recall reading about Soviet spies buying a cabin close to the AT&T long lines microwave path to intercept calls & fax transmissions in the 60s or 70s.
10 gigabit Ethernet 80 GHz point-to-point bridges
31–40 of 94 posts
Re: 10 gigabit Ethernet 80 GHz point-to-point bridges
#32• Secure communication due inability to intercept the laser-like beam transmission at free air I would not trust that as a security layer.
It's definitely not something to trust in, but intercepting (at a layer 1 level) a PTP 80 GHz link is actually harder than tapping fiber. You'd have to have Rx equipment either directly in the path or directly behind both ends of the radio link. As compared to the effort required to cut an aerial or underground singlemode cable and fusion splice in place a passive prism split tap (basically the same thing as insertin…
I wonder if introducing a semi-translucent obstacle, like a cloud of smoke, would be enough to capture the signal while not disrupting the original connection too much?
Re: 10 gigabit Ethernet 80 GHz point-to-point bridges
#33Earlier quoted context omitted.
If you've got line of sight then current (cheap) tech should do just fine. Sure not 10x gigabit but you can def get some decent internet...
Do you have any recommendations for current products for line of sight?
I know some people who have successfully used Ubiquiti's airFiber for point-to-point links. I think those run on the order of $5 grand for a complete installation (two radios, mounts, etc) of a faster-than-gigabit link.
Re: 10 gigabit Ethernet 80 GHz point-to-point bridges
#34Ooh, I really want two of these. I'm stuck on an island with poor last mile service providers. But, I have line of sight to a number of spots with good quality fiber.
I love Ubiquiti's products. They're easy to setup and cheap too. From experience, they're also quite reliable.
The company's community forums can be quite helpful too.
What kind of link are you after? (Speed, distance, how far over water, are both sites powered, etc)
Re: 10 gigabit Ethernet 80 GHz point-to-point bridges
#35Crap, now I need to go buy a couple of these and lobby the nearest data center for some rooftop space.
That is the short way of saying I had no idea you could get antenna this effective for wireless data transmission. I'd seen the 5mbps ones but nothing close to a gigabit much less 10 gigabits. Time to draw a 10km radius circle around my home address :-)
Re: 10 gigabit Ethernet 80 GHz point-to-point bridges
#36Crap, now I need to go buy a couple of these and lobby the nearest data center for some rooftop space. That is the short way of saying I had no idea you could get antenna this effective for wireless data transmission. I'd seen the 5mbps ones but nothing close to a gigabit much less 10 gigabits. Time to draw a 10km radius circle around my home address :-)
I've seen up to about 400 Mbps on my Webpass [1] connection for a couple years, and I think that's pretty run-of-mill tech at this point [2]
Re: 10 gigabit Ethernet 80 GHz point-to-point bridges
#37Crap, now I need to go buy a couple of these and lobby the nearest data center for some rooftop space. That is the short way of saying I had no idea you could get antenna this effective for wireless data transmission. I'd seen the 5mbps ones but nothing close to a gigabit much less 10 gigabits. Time to draw a 10km radius circle around my home address :-)
I've seen up to about 400 Mbps on my Webpass [1] connection for a couple years, and I think that's pretty run-of-mill tech at this point [2] 1. https://webpass.net/ 2. https://www.ubnt.com/broadband/
Webpass uses a fairly large number of Siklu 80 GHz 1 Gbps radios on rooftops for backbone links in SF.
Re: 10 gigabit Ethernet 80 GHz point-to-point bridges
#38it's worth noting that this is just the first one publicly announced and not under NDA.. It's from a russian radar/microwave/millimeter wave manufacturer. All of the other much larger players such as Bridgewave also have 10 Gbps radios coming.
Those BW 80 GHz links are pricy$$$, but like anything the cost will come down in a few years.
Re: 10 gigabit Ethernet 80 GHz point-to-point bridges
#39It's interesting to see the huge channel bandwidths they're using to attain this. Advances like this are largely driven by higher sample rate ADCs and DACs becoming more viable in recent years. Edit for clarity: channel bandwidths in the datasheet are up to 2 GHz. Need to close the link at 32 QAM to hit 10 gb before error correction overhead at that bandwidth, which is certainly doable. Also, it's interesting to note…
>higher sample rate ADCs and DACs becoming more viable Question, on optical networks doesn't this make dispersion more of a problem?
80 GHz isn't quite optical yet. It's a couple octaves down from infrared. SFAIK, it's still very much radio.
Re: 10 gigabit Ethernet 80 GHz point-to-point bridges
#40It's interesting to see the huge channel bandwidths they're using to attain this. Advances like this are largely driven by higher sample rate ADCs and DACs becoming more viable in recent years. Edit for clarity: channel bandwidths in the datasheet are up to 2 GHz. Need to close the link at 32 QAM to hit 10 gb before error correction overhead at that bandwidth, which is certainly doable. Also, it's interesting to note…
You can pack many bits into a constellation point. Think 1024 QAM.
That's a pretty narrow ledge to stand on @ 800 GHz. Wonder what the FEC regime is?