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User: petecarlson

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Comments · 278

  1. Re:Radiation on Old AM Broadcast Towers Get a New Life · · Score: 2

    You can be on the tower, or you can be on the ground, but you can't be on both. It's not the potential that kills, it's becoming a circuit path. Birds roosting on power distribution lines, which as a general rule are not insulated, don't die due to that fact.

    That's not how any of this works.
      First, the tower is grounded and at the same potential as earth. The primary concern is not electric shock.
    The parent poster was concerned with worker safety when exposed to radio frequency energy.
    https://transition.fcc.gov/Bur...

    After performing the required calculations and determining it is safe to work at x distance from the transmitter antenna, workers will typically wear a personal RF monitor to measure exposure.

    As others have mentioned, you are pretty wrong here. The vast majority of AM towers are the radiators and the ground is the ground plane. Between them sits a huge isolator which is generally ceramic. If you stand on the ground and touch the tower above the isolator you will get burned or dead.

    This makes colocating on an AM tower a PITA as you can't just run a conductor up the tower without a transformer. There are ways to do it, my favorite being to get power off of the tower lighting circuit to power a tower mounted enclosure and then running fiber off of the tower if I need to come off of it.

  2. 1. Required to do free peering.

    With anyone? No conditions? The devil is in the details. I need some justification. Do my customers want to get to your content above a level where it makes sense for me to peer with you? Do you run a decent network that isn't oversubscribed? Lets say $content provider traffic over your network is crap, lots of jitter, loss, whatever. I can also get $content providers traffic from someone else. If my customers use a lot of $content providers service, then I'm not peering with you. My customers don't know or give a crap. They just know that their Netflix is crappy and its my fault.

    2. Must provide, among other services, a basic FCC specified service at a set price with a fixed installation fee. Initially 1Mbps up/down for $10 a month with a $50 installation fee.

    This would kill my company and any start up ISP. Your mile drop up to you house in the hills might cost me 5K to build. I'm not signing up for that. I can't build out anything for $10 per month. Not signing up for that.

    3. Legally obliged to provide service within two weeks of any request in their designated service area, or face fines.

    This would kill my company and any start up ISP. How on earth am I supposed to build fiber out to you in two weeks? How am I supposed to build out infrastructure to hit every house in an area with fixed wireless? Completely impossible.

    3.1 Local governments specifically allowed by FCC to provide service to customers not any active ISP's service area. 4. Must tier service only by bandwidth and nothing else.

    No real issue with the former, but the latter would preclude SLAs for business customers, DIA vs Best effort, i.e GPON vs Active fiber so I think your restriction is dumb and not well though out.

    4.1. No data caps or overages. Throttling only allowed to temporarily deal with network congestion and must not lead to worse service than the basic FCC mandated plan.

    Not the end of the world, but also would preclude a lot of smaller rural WISPs from ever starting. You have to have over subscription if you want residential pricing that isn't measured in thousands. Thats just how the internet works. With over subscription comes the requirement that you implement a fair queue method. That might be caps, overages, or throttling.

    5. Must not filter any traffic except for security purposes, and those filters should be under the control of the customer.

    I'm mostly ok with this.

    6. Must allow customer to provide their own equipment, without additional charges.

    This doesn't always work. I mean if you wan't to buy your own Calix 844G then I'm fine with it, it saves me $300+, but I need to control the RG side of it. You can't just expect that I'm going to put the resources into making your $whatever GPON device work. There are a ton of innovative deployment scenarios that just don't work that way. Take some of the Open Cord CPE implementations where the brains of the CPE exist in the data center. Your Idea just wouldn't work.

    That being said, I feel strongly that ISPs are common carriers and should be regulated under something like Title II, abet with forbearance from a lot of the more onerous crap that doesn't really apply to us. Forbearance run by a bunch of people like you, or the current fcc, that have no idea what the internet is or how it works is a blade hanging over the neck of ISPs so it scares me. Things as they were under the open internet order worked pretty well, but there was always that blade hanging there and you never know who is going to have their hands on the lever. We do need a re-write of the communications act creating something like Title II for ISPs.

  3. UBB makes sense to me on Comcast Predicts Usage Cap Within 5 Years · · Score: 1

    I have to admit that I see his point. Residential bandwidth pricing is based on the concept of oversubscription. I run a small local ISP and have seen sustainable oversubscription numbers move from around 75:1 ten years ago to somewhere around 12:1 today and am using 8:1 to plan deployments for the next 2-3 years. Equipment and transit costs have come way down, which have allowed us to keep pricing relatively stable while increasing package speeds, but as we approach 1:1 usage, there is no way to make the model work without passing on full bandwidth costs, core costs, and last mile costs to the end user. Around 3% of our subs end up costing us more in bandwidth usage then they pay us for service which is supportable for now, but as that percentage grows with increased full time streaming, we will either need to raise prices across the board, or start charging based on actual usage. What would be ideal, IMHO, is 95th percentile billing, i.e 10mbps on a 100mbps circuit with 95th percentile billing above 10mbps, but the vast majority of users just wouldn't get it.

  4. Re:Ditto the A.C. on One Broken Router Takes Out Half the Internet? · · Score: 1

    Is that a 12000 series?

  5. Re:I'm not sure I follow on One Broken Router Takes Out Half the Internet? · · Score: 4, Informative

    If I'm understanding this 'router' thing correctly, its like a faucet connected to the series of tubes?

    If not, exactly what role does this router thing play in tube interaction?

    Your understanding is rather accurate but what your missing is the manifolds. You see, all the tubes connect to big manifolds with valves to control what gets sent where. At each manifold room there is some poor admin who is in charge of opening and closing valves in order to make sure that the right AOL gets sent down the right tube. In order to keep track of what tube to send your AOL down, the admin keeps a list of all the other manifold rooms and how to get to them. Some of the manifold room operators didn't have a wide enough notebook to write down the new directions so they just closed all of their valves and went home.

  6. Re:Outage Cause: Old software on One Broken Router Takes Out Half the Internet? · · Score: 1

    Perhaps they were just trying to load balance a 56k modem and a 10gb connection.

  7. Re:Ditto the A.C. on One Broken Router Takes Out Half the Internet? · · Score: 4, Informative

    It wasn't just AS47868, it was kicked off by AS47868 sending real long routes like you can get to a by going through b, c, d, e, f ,g, h... and so on and so forth. Older versions of IOS wack out with the crazy long routes and lose their BGP sessions so it is possible that he lost half of the internet while you were on a network segment which was not seeing the issue. If the OP were to post the ASN or IP block he was on we could run BGP play and see just how much of the net he really lost. I'm going to guess about .5%.

  8. Re:Before I hit their site on Lame Duck Challenge Ends With Free Codeweavers Software For All · · Score: 4, Insightful

    I am having a problem believing that a Slashdot user ,with a UID of 893, does not know what Codeweaver is.

  9. Re:That's one smug grin i would love to see. on Tufts Tells Judge, We Can't Tie IP To MAC Addresses · · Score: 1

    My point was not that this is the best way of doing things, but rather that this is often the way things are done and is quite likely the same setup that was being used in the network in question.

  10. Re:That's one smug grin i would love to see. on Tufts Tells Judge, We Can't Tie IP To MAC Addresses · · Score: 5, Informative

    I run an ISP which uses multiple DHCP servers on each layer2 segment. DHCP assignments are logged and kept for a month but quite frequently we get a notice of claimed infringement, spam, or malicious behavior that can't be mapped to an active DHCP assignment at the time stated in the notice. That is not to say that the claimant is making things up, rather that DHCP is not authoritative. A DHCP offer does not need to be taken and even if taken it does not need to be kept. Mac (Not MAC) users seem to have the habit of taking an IP address they have received in the past and setting it as a static IP. I don't use a Mac but this must be in the gui somewhere because it happens all the time.

    A dhcp server can't match ip to mac ? Oh sure why not ... if I were the RIAA's lawyer I'd say "then I'm sure you won't mind if I take a look at those logfiles, now will you ?". And then accept their apology in trade for a promise not to persecute this guy personally for lying in court (2 years).

    1) User 1 receives a DHCP assignment and sets it as static. They then turn off their laptop after some time.

    2) Lease runs out and the address is returned to the pool.

    3) User 2 requests an IP and is assigned the same IP (IP1).

    4) User1 gets home and turns on their computer and starts sharing "The Wire ...".

    5) User2 gets IP conflict message and repairs connection. Gets different IP (IP2) from other DHCP server.

    6) HBO sends me a "Notice of Claimed Infringement" for IP1 at time X.

    7) I look up who was assigned IP1 at said time and come up with user2.

    Looks like we got our match.

  11. Re:It flew under the radar on Best Buy Is Selling Ubuntu · · Score: 4, Funny

    If they were already running Ubuntu or another modern operating system I would agree with you but that's not the case. The target market is people running Win98/Me/Vista. The 98/me folks can't get the piece of crap to burn a CD while the suckers who bought vista can't get networking to work right.

  12. Re:Vaporware? on VW Concept Microcar Gets 235 MPG · · Score: 1

    What to you is a sacrifice is to others a plus. forget the mileage, look at required parking space. You can head in a Smart4two saving a good half hour a day looking for parking. In a neighborhood where the average house is 12' wide and the average vehicle is 12' long you quickly run out of parking with 1.5 vehicles per household. I got rid of my car two years ago, well before the gas prices spiked, and it had nothing to do with gas and everything to do with parking.

  13. Re:Vaporware? on VW Concept Microcar Gets 235 MPG · · Score: 4, Interesting

    When some new gas saver comes out (like the smart4two), do people really line up to purchase it?

    The waiting list for the smart is close to a year.

  14. Nice Cat on Denon's $499 Ethernet Cable · · Score: 1

    I have been looking at 5000' spools of cat5e with insane pricing but the per foot cost on this is just nuts. I am guessing this us used for "ethersound". I have no idea what that is but it seems to be what all the nice flexible pur jacketed cables are meant for. If you just want some nice cable, look at
    Mercator cat.5 pur or Koltz Ramcat5.

    P.S.
    I am looking for reasonably priced, stranded, shielded, pur jacketed, outdoor rated cat5 or cat5e with a diameter from 5.9 to 6.5 mm. Anyone have a source?

  15. Re:Wouldn't it be nice... on Spammers Hijacking IP Space · · Score: 1

    Lets say I were to filter their advertisements at my core routers. Would I need legal justification to do this? I could just as easily filter Google or MS or anyone else for that matter but I don't because I believe that it is not my job to decide what is good bad or ugly on the internet. We need to have standards for behaviors and when it comes to IP space, I respect ARIN. When ARIN says that the bastards don't own the IP space and they continue to advertise it, I will then start to filter it. Until that point, I can't be the judge of the intertubes. On the other hand, if your not an ISP and your routers just route for your own org, I would filter away.

  16. Re:from the blog on City-Provided Wi-Fi Rejected Over "Health Concerns" · · Score: 1


    A mobile phone typically produces 1/1000th as much power, and spreads it as evenly as possible around the antenna.

    That would be a theoretical 0db antenna. In the real world, antennas have gain which focuses the rf output. Most cell antennas have gain of about 1db which isn't much.

  17. Re:Bluetooth replacement? on "GiFi" — Short-Range, 5-Gbps Wireless For $10/Chip · · Score: 1
    Better late then never. Perhaps you check your SD messages.

    Free Space loss formula can be found here:
    http://en.wikipedia.org/wiki/Free-space_path_loss

    Absorption

    Low-frequency radio waves travel easily through brick and stone and VLF even penetrates sea-water. As the frequency rises, absorption effects become more important. At microwave or higher frequencies, absorption by molecular resonance in the atmosphere (mostly water, H2O and oxygen, O2) is a major factor in radio propagation. For example, in the 58-60 GHz band, there is a major absorption peak which makes this band useless for long-distance use. This phenomenon was first discovered during radar research during World War II. Beyond around 400 GHz, the Earth's atmosphere blocks some segments of spectra while still passes some--this is true up to UV light, which is blocked by ozone, but visible light and some of the NIR is transmitted.

    Heavy rain and snow also affect microwave reception.

    http://en.wikipedia.org/wiki/Radio_propagation
  18. Re:Bluetooth replacement? on "GiFi" — Short-Range, 5-Gbps Wireless For $10/Chip · · Score: 3, Insightful

    Walls? Forget about it. This is 60GHz your talking about. Good luck getting it out of the case you put the chip in let alone through a wall, your body, or too much oxygen.

  19. Re:Powerboost on Comcast Cheating On Bandwidth Testing? · · Score: 2, Informative

    Imagine it like a bucket with a fill rate of X and a drain rate of 10X. No matter how you work it, you are only going to get data over the long term at rate X although over the short term you could get speeds of 10X till your bucket is full.

  20. Re:I used to work there.... on Starbucks Drops T-Mobile For AT&T · · Score: 1

    I thought they were using the 2800 series. I don't think that the package they use will run on the 1700. I will try to look up some data as I am looking for 7500 used 2811s to hit the used market...

  21. Re:Hooray? on Starbucks Drops T-Mobile For AT&T · · Score: 1

    been to The Grind in Fells Point? Good coffee and good Wi-Fi. Drinking a cup right now. No Starbucks though. Most of us won't stand for that on the FP side of the line.

  22. Re:For $1500/month on Time Warner Filtering iTunes Traffic? · · Score: 1

    Overselling is not without risk there is an outside chance that overselling will backfire and the isp may/should have compensation plans in place for IF that happens.

    We do have compensation plans in place. They are called SLAs and they come with the above mentioned $1500/month contract.

  23. Re:Not Comcast on How Pervasive is ISP Outbound Email Filtering? · · Score: 1

    Welcome to 2008. Same as 1998 just more ads, more noise, more expensive and less choice. That's progress. Can us geeks take the Net back now? We let it out and the MBAs fucked it up. Let them build their own.

    Hate to break it to you, but the money to build it comes from the MBAs and the decision to filter outbound SMTP comes from the geeks. The MBAs ask how we can keep our outbound mail from being dropped and the geeks come up with a way of doing it that makes the most sense to them. I consider myself a geek and I filter outbound SMTP through my mail servers and limit excessive outbound SMTP to other mail servers. As an ISP, you are trying to manage a network with "The Internet" on both the outside and the inside and thus can trust no one. If I let the traffic from the inside of my network abuse the clients on other peoples portions of the internet, they will rightfully block access from my clients and then my clients will start calling to complain that they can't send email to $ISPs email accounts. If I were to drop filters today, Outbound mail to Comcast from any of my IP addresses would be blocked within 2 days. Verizon would block in about 10 and AOL would kick in after about two weeks.

    On another note, Comcasts response to an unblock request takes about 12-24 hours the first couple times but after that you need to fight to find someone who cares as their automated system will ignore you after awhile.

  24. Re:The recession and Apple on Math on iPhones Just Doesn't Add Up? · · Score: 1

    I was waiting for the 3G version but work got me one for Christmas. EDGE is horrid but for the most part I am within range of 802.11 throughout most of the day. This sucks power and it took a little getting used to having to plug it in all the time but once I picked up USB adapters for all of my computers I manage to keep a good charge most of the time.

    A few notes:
    1) I would love to not have to worry about jailbreaking each new version of the firmware.
    2) I need Linux support.
    3) Antenna placement is sub-optimal. The hand is a bad radome. This forces the radio to transmit at higher power and thus reduces battery life.
    4) The phone is not able to display full ssids of 37 characters. Often I can not tell what network or sector I am trying to connect to.
    5) There is no way to connect to a particular BSSID
    6) There is no radius supplicant. This sucks.
    7) The phone will not display the BSSID of the network I am connecting to.
    8) You can not set the modulation down to a lower data rate for better "long range" 802.11 connections.

  25. Drive fast, turn left on UPS Using Software To Eliminate Left Turns · · Score: 1

    Wonder how this works for this department...
    http://www.racing.ups.com/