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walrus01

36,607karma·8,693submissions·February 19, 2016
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all your base are belong to us
recent activity (8,693 total)
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That span is the total allowable space in the FCC part 15 rules for 5 GHz gear, where the AF5/5X has been tested and certified. Other radios can be used from 5200 to 5850 MHz (DFS frequencies per…
10y ago·view thread
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That is true. One of the fun things illustrating first-hand how microwave/millimeter wave and fiber are the same thing is if you ever get to handle a 120 GHz band waveguide/feed. Some radar …
10y ago·view thread
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An AF5 or AF5X PTP link isn't a transparent 1Gb full duplex bridge, realistically you'll achieve 250-400 Mbps max. They're great radios but physics is still physics, 40 or 80 MHz wide d…
10y ago·view thread
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a great deal lower, the optical ITU DWDM grid is around 191.7 THz to 196.1 THz
10y ago·view thread
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Webpass uses a fairly large number of Siklu 80 GHz 1 Gbps radios on rooftops for backbone links in SF.
10y ago·view thread
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there was at one time talk of expanding the 'five eyes' community to seven or nine, countries such as norway, denmark and germany would have been the top candidates for inclusion.
10y ago·view thread
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> In most businesses if a man wears anything except a suit and tie it is a topic of serious consideration, and possibly a firing offense. You haven't been anywhere near any sort of technology …
10y ago·view thread
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Now that's just xenophobic and ignorant, you expect all 175 million people to go where? It's like blaming every single person in Maricopa County, AZ for the actions of Joe Arpaio. https:&#…
10y ago·view thread
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http://www.lamont.me.uk/capenhurst/original.html http://www.independent.co.uk/news/how-britain-eavesdropped-o... …
10y ago·view thread
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not really, fiber is still greatly preferred (For example: it's impossible to do 40Gb by microwave/millimeter wave, but a CWDM 4-channel 4x10GbE passive mux/demux on two strands of sing…
10y ago·view thread
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Yes, or if your fast, cheap new metro ethernet 10GbE circuit between two buildings has been provisioned by your ISP as some form of transport (handoff into a WDM system, EoMPLS tunnel), etc, it's…
10y ago·view thread
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it'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 la…
10y ago·view thread
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Most new licensed band 6, 11, 18, 23 GHz radios these days are 1024QAM capable. For 80 GHz the hot new thing is radios capable of 16/64/256QAM at varying code rates.
10y ago·view thread
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for what dollar figure, distance and speeds? anywhere from $300/link (a pair of ubiquiti powerbeam AC 5 GHz) up to $20,000 for 1 to 10GbE licensed.
10y ago·view thread
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terrestrial microwave engineer here: "80 GHz" is actually 71-86 GHz FDD. The original FCC band plan allowed for 5000 MHz wide channels each direction and basically OOK or BPSK level modulati…
10y ago·view thread
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It has a 10GbE SFP+ optical interface and functions as a layer 2 ethernet bridge. From an ethernet port perspective same as 99% of the other PTP microwave and millimeter wave radios on the market. Wha…
10y ago·view thread
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That's the nature of 80 GHz, design the links for your climate and don't try to go more than 2-3km. You can achieve five nines. And yes, run a 5.x GHz backup path in parallel.
10y ago·view thread
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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 t…
10y ago·view thread
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80 GHz is "light licensed" in the US, the paperwork requirements are not onerous. It's less costly and complicated than a regular part 101 licensed microwave link.
10y ago·view thread
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it's a blunt dog whistle for "hey libertarian gold hoarders we are your sort of people"
10y ago·view thread
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IMHO if you're doing anything financial and don't own the bare metal hardware that the hypervisor runs on and 100% control physical access to it, and run your own network gear (right up to y…
10y ago·view thread
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It was fairly widely known in the network engineering community in 2003/2004 that the "Echelon" system collected an extensive amount of domestic data for each of the five eyes, using le…
10y ago·view thread
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Most of the talent pool of qualified persons who can successfully install openbsd and configure it properly as a firewall have probably obtained foreign work visas and are not working for domestic ent…
10y ago·view thread
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Particularly when basic networking gear that will do the job is NOT that expensive. There are equipment importers in major south asian cities who bring in used/refurb PCs, servers and network gea…
10y ago·view thread
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Without going into detail that violates an NDA or reveals who I am, I've seen the back-end database/billing/network monitoring infrastructure for the three largest mobile network operat…
10y ago·view thread
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Whole article tl;dr: randian libertarian idealist buttcoin people are extremely surprised to discover that a black market economy turns out to actually contain real blackhats.
10y ago·view thread
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Not really, if your expected adversary is your local nation state that wants to watch your Internet traffic for domestic political dissent (Iran, Ethiopia, China, etc).
10y ago·view thread
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This is totally unsurprising to anyone that has seen in person the state of "enterprise" IT at a large organization in India, Pakistan or Bangladesh.
10y ago·view thread
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> more basic journalism than CNN? CNN has been a joke for a long time.
10y ago·view thread