Re: [WISPA] Dumb question?
Easy, the current Wimax MAC (802.16d and e) was designed for licensed frequencies, noise is not well handled by the protocol Gino A. Villarini g...@aeronetpr.com Aeronet Wireless Broadband Corp. tel 787.273.4143 fax 787.273.4145 -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of D. Ryan Spott Sent: Monday, March 30, 2009 3:11 PM To: undisclosed-recipients Subject: [WISPA] Dumb question? We have this ?great? MAC used for WIMAX in various frequencies. Why can't we (or some vendor) use this MAC in 2.4/900? It just makes sense I would think. There must be a reason... please clue me in with the clue-by-four. ryan WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
[WISPA] Bad Geocoding Data
This article in the LA Times: http://www.latimes.com/news/local/la-me-geocoding-errors5-2009apr05,0,5966285.story This documents the reasoning for why I have not completed my Form 477 data yet. Nearly 40% of my customer base will have to be re-coded for the Form 47 because the geocoding databases are incorrect. My lead tech has exported the geocode data out of Freeside and into Google Earth, sorted by AP. When we look at the data, a very high percentage of our customers have GPS coordinates of Post Office of their town/village. We still have a lot of county road and rural route addresses in this area, and they don't geocode correctly. Data with 40% noise borders on useless. I applaud the spirit behind the 477, but asking us to provide this granular data without the right tools to assemble the data and verify it makes it a nearly unanswerable proposition. Matt Larsen vistabeam.com WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] Bad Geocoding Data
Matt, Geocoding is never an exact science nor can it possibly be as accurate as the actual obtained coordinates for a client. Geocoding first relies on the accuracy of the Census Tiger line mapping databases. All mapping companies use this as a base and then do various levels of data checking and refinement to improve the results. Important facts to note about geocoding: - The result will only resolve to the road frontage not the structure. - 911 Addressing is supposed to be standardized so that every 50 feet or so of road frontage has an actual numeric address. If a locality has deviated from the standard you will get inaccurate results from some mapping sources. - Tiger map data knows the range of address numbers between intersections and will estimate the point along the highway based on the 50 foot rule. - Some geocoding software will tell you the accuracy for which it resolved the address record. - For different parts of the country different companies have different levels of accuracy based on their efforts to improve the data. - There are only three or four major companies that do this type of work and therefore most mapping companies will contract for that data. This is why you can see the same errors from different sources. They all used the same data source. GDT is one of the big sources. When I geocode addresses using GIS software, I can get results back that tell me at which level of accuracy I was able to achieve. It can fail to create a point on whatever level I wish. The three basic levels are, building match, street match which means it placed it on where the address should be along the road, and then zip code match. For the zip code match it will place the location at the default centroid point defined by that zip code polygon. It will not always be the post office. the quality of how the address data is formatted can make a huge difference as well. How people abbreviate some things will cause wildly different results. On the topic of zip codes, it is important to note that the post office does not define polygons and zip code areas. That was something the Census Bureau created. Zip codes are a linear routing function. If you would like a full explanation with illustrations go to this link http://www.manifold.net/doc/manifold.htm which is the software user manual. Click on the index button and go to the z section and look at the topic zip codes are not areas The majority of the Geocoding problems are a result of the garbage in garbage out syndrome of any database system. Thank You, Brian Webster -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org]on Behalf Of Matt Larsen - Lists Sent: Monday, April 06, 2009 10:51 AM To: WISPA General List; w...@part-15.org Subject: [WISPA] Bad Geocoding Data This article in the LA Times: http://www.latimes.com/news/local/la-me-geocoding-errors5-2009apr05,0,596628 5.story This documents the reasoning for why I have not completed my Form 477 data yet. Nearly 40% of my customer base will have to be re-coded for the Form 47 because the geocoding databases are incorrect. My lead tech has exported the geocode data out of Freeside and into Google Earth, sorted by AP. When we look at the data, a very high percentage of our customers have GPS coordinates of Post Office of their town/village. We still have a lot of county road and rural route addresses in this area, and they don't geocode correctly. Data with 40% noise borders on useless. I applaud the spirit behind the 477, but asking us to provide this granular data without the right tools to assemble the data and verify it makes it a nearly unanswerable proposition. Matt Larsen vistabeam.com WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] Big Brother's coming...
Exactly why Public Safety and Municipalities don't need Fiber like speed broadband. The more capacity they have, the more creative they can get. Next thing you know, in real time, every time you pass a traffic light, they'll also be checking instant verification on Did you pay your taxes? Did you pass Emissions? Checking for SeatBelt? Were you using your Cell phone? (outlawed in DC, while in Car). Do you have unpaid tickets? and auto dispatch an officer to intercept you. Think about it What if they just decided to put an officer at the corner where the camera was And as the License plates were cross referenced against the global database, the officer was ready to go, to go get you. Why stop at $100 million in revenue? When multiples of that could be gained harrassing the many average American that might get behind on that beurocracy. :-( Mmmm, Starting to sound like travelling in East Berlin, before the wall came down. Actually... Here in Montgomery County, it was a bit different, than I represented. The MD State passed the initiative to put Camera's everywhere. The County Official Leaders were fighting hard to support it also. But then, at the County Meeting, an attendee came and read a page from a well known famous Sci Fi Book, (about Big Brother type stuff), consciences were challenged, and the majority then voted against allowing the camera expansion. However, then it went back to the State, and the State overturned the County's decissions, and made the Camera expansion mandatory anyway. If that is not proof on its own, that the larger Big Government had the power to take action with disregard for what the local government people wanted, one step closer to Big Brother :-(. Tom DeReggi RapidDSL Wireless, Inc IntAirNet- Fixed Wireless Broadband - Original Message - From: Drew Lentz d...@drewlentz.com To: WISPA General List wireless@wispa.org Sent: Sunday, April 05, 2009 2:49 AM Subject: Re: [WISPA] Big Brother's coming... Contrib: http://arstechnica.com/tech-policy/news/2009/03/traffic-cameras-billed-as-an swer-to-chicagos-budget-deficit.ars This time around, though, the company trumpeting the addition of these digital watchdogs isn't portraying them as useful tools for catching speeders simple yet complete answer that delivers totally accurate, instant insurance status verification. An additional unique advantage is that this system is also non-invasive, ensuring protection for every insurer and policyholder. The Chicago Sun-Times quotes InsureNet president Dr. Jonathan Miller on what the city might expect to earn with the system in 2009. Certainly, it will be well in excess of $100 million, Dr. Miller said. We think at least $200 million. And the upward projections are far higher. On 4/3/09 6:57 PM, Tom DeReggi wirelessn...@rapiddsl.net wrote: Big Brother already started comming with those darn Traffic Cameras. I got 6 tickets (40mph in newly posted 25-30 mph zones) within 2 weeks. They plan to eventually have them at EVERY Intersection here. I'm suspecting more privacy will be lost as more networks become operated/controlled by governments. I'm hoping the Broadband Stimulus public safety goals means mobile broadband to officers on the street or inter-agency, and not more traffic control. PS. A little off topic to Cyber Security, but relevent to Big Brother :-) Tom DeReggi RapidDSL Wireless, Inc IntAirNet- Fixed Wireless Broadband - Original Message - From: rea...@muddyfrogwater.us To: WISPA General List wireless@wispa.org Sent: Friday, April 03, 2009 7:17 PM Subject: [WISPA] Big Brother's coming... http://www.eweek.com/c/a/Security/Bill-Grants-President-Unprecedented-Cyber-S ecurity-Powers-504520/ Sometimes I wish people would REALLY pay attention. All this whining and moaning about how Bush violated our rights... Anyway... this is reason for concern for all of us. insert witty tagline here - --- WISPA Wants You! Join today! http://signup.wispa.org/ - --- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -- -- WISPA Wants You! Join today! http://signup.wispa.org/ -- -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/
[WISPA] For mapping Zip codes are not polygons or areas.....
Thought I would try to post a good explanation of why zip codes technically are not polygons. With all the mapping talk and efforts these days, it's an interesting fact to note. This explanation comes from the user manual of my GIS program, www.manifold.net Zip Codes are Not Areas ZIP codes are postal codes in the United States created by the US Postal Service. Perhaps the most common misconception in GIS is that Zip codes are polygonal regions or areas. People often think of mapping in the US as a hierarchy of ever-subdivided polygonal areas: states, counties, cities, zip codes. If they need higher resolution than a county, they next leap to zip codes because they think of zip codes as polygons. This is not true. Zip codes are linear features associated with specific roads or with specific addresses such as apartment buildings or military bases that are best regarded as a point. In some cases, Zip codes have no physical location because they are assigned to a mobile or abstract location such as a military ship. Even in the most common case of Zip codes assigned to streets, Zip codes do not clump together in groups that may be covered by rational polygons. We can consider an example using a map of part of Reno, Nevada, shown below. This map is fairly typical of the situation in mid-sized urban areas. It is extracted from the US Census Bureau's TIGER/Line 1997 data set, which includes roads as segments of lines, with most line segments coded with Zip and Zip+4 codes for that particular segment. In this note, we will refer to both Zip codes and the Zip+4 extension together under the name Zip code. To create polygons from road lines where lines have a common zip code there are several approaches. One possible approach is to select all line segments with the same Zip code and to then draw an area (polygon) that encloses them. This can be done by creating a buffer zone about each street line having a particular Zip code and then doing a Union of the buffer zone areas thus created. The blue, purple and green areas were created in this way and each represent a a different Zip code value. The road lines shown in red selection color all have yet another Zip code in common. Immediately there are three pathologies visible in this map. First, note that the blue area is not contiguous. Second, note that there are many regions of overlap between the blue and the purple areas and between the purple and green areas (we should have used varying layer opacity so that the regions of overlap were clearer). Third, note that at least one road segment highlighted in red (all having the same Zip code) occurs inside the purple zone where it is completely surrounded by all adjacent streets having a different Zip code. The above situation is extremely common. In fact, we used this particular map at random because it happened to be a part of the Reno area in which the main Manifold warehouse was located. Any urban map in the US will show similar, if not even more bizarre effects. Rural maps can have such a sparse network of roads with such strange zip code assignments that some rural areas cannot even be approximated with zip code regions. For the above reasons, any map that purports to show Zip Code Areas or Zip Code Polygons should not be taken as a precise map showing Zip code locations. It is at best some sort of approximation and most likely is wildly inaccurate in certain regions. The approximations can be useful, but they should not be confused with the real thing. The US Postal Service, of course, doesn't make it any easier to deal with such issues by making it easy to get Zip code information. Zip code information is not available for download via Internet from the US Postal Service. It is best obtained from (of all agencies!) the US Bureau of the Census. ZIP Code Tabulation Areas (ZCTAs) For statistical tabulation purposes the Census Bureau has long found it convenient to work with Zip code groupings of population. Zip codes have been so useful that the Bureau embarked on a project to create a standardized map of the US showing the approximate region of coverage of various Zip codes as areas. These areas are known as ZIP Code Tabulation Areas (ZCTAs). ZCTAs may be downloaded from the Census Bureau's www.census.gov site. Drill down to the Cartographic Boundaries pages to get ZCTAs. Download them using .e00 format so they will import into Manifold using the correct NAD83 datum. Before ZCTAs were published, every vendor of maps used in GIS had to resolve the various ambiguities posed by Zip code pathologies like those shown above. With ZCTAs the GIS industry can now use a standard approximation that is the same used as the Census Bureau for publishing demographic information. It is not clear if the Bureau will continue to create ZCTAs after the year 2000; however, they are so useful we believe they will become the industry standard for maps representing Zip codes as areas.
Re: [WISPA] Big Brother's coming...
On 4/6/2009 8:23 AM, Tom DeReggi wrote: they'll also be checking instant verification on Did you pass Emissions? Out here in California, the state of the bazaar, it's already happened. Not everywhere, but like sobriety checks, at random places. They call it Smog Check II or something like that. I've driven through a couple of them. They put gas analyzers on tripods at the on-ramps to the freeways. As you drive through, it analyzes your emissions and shoots a pic of your license plate if you're out of spec. Swell. Rk WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] Big Brother's coming...
In case you didn't read the first article... here's a bit... The Cybersecurity Act of 2009 introduced in the Senate would allow the president to shut down private Internet networks. The legislation also calls for the government to have the authority to demand security data from private networks without regard to any provision of law, regulation, rule or policy restricting such access. The headlines were all about creating a national cyber-security czar reporting directly to the president, but the Cybersecurity Act of 2009 introduced April 1 in the U.S. Senate would also give the president unprecedented authority over private-sector Internet services, applications and software. According to the bill's language, the president would have broad authority to designate various private networks as a critical infrastructure system or network and, with no other review, may declare a cyber-security emergency and order the limitation or shutdown of Internet traffic to and from the designated the private-sector system or network. The 51-page bill does not define what private sector networks would be considered critical to the nation's security, but the Center for Democracy and Technology fears it could include communications networks in addition to the more traditional security concerns over the financial and transportation networks and the electrical grid. insert witty tagline here - Original Message - From: Rick Kunze rku...@colusanet.com To: WISPA General List wireless@wispa.org Sent: Monday, April 06, 2009 8:57 AM Subject: Re: [WISPA] Big Brother's coming... On 4/6/2009 8:23 AM, Tom DeReggi wrote: they'll also be checking instant verification on Did you pass Emissions? Out here in California, the state of the bazaar, it's already happened. Not everywhere, but like sobriety checks, at random places. They call it Smog Check II or something like that. I've driven through a couple of them. They put gas analyzers on tripods at the on-ramps to the freeways. As you drive through, it analyzes your emissions and shoots a pic of your license plate if you're out of spec. Swell. Rk WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] Big Brother's coming...
This one's just as nuts... from e-week...: Proposed legislation would put authority over the security of government and private networks in the hands of officials reporting to the President. President Obama promised in his campaign to take cybersecurity seriously and he appears to be following up on that promise. Legislation just introduced in the Senate, written with White House input according to the Washington Post, would federalize the business of computer security. It would give White House officials the power to shut off private networks, decide what products could be used for security and set rules for who could practice computer security. The legislation is actually in two bills, S.773 and S.778. The titles of the bills are: S.773A bill to ensure the continued free flow of commerce within the United States and with its global trading partners through secure cyber communications, to provide for the continued development and exploitation of the Internet and intranet communications for such purposes, to provide for the development of a cadre of information technology specialists to improve and maintain effective cybersecurity defenses against disruption, and for other purposes. and S.778A bill to establish, within the Executive Office of the President, the Office of National Cybersecurity Advisor. I couldn't find the actual text of the legislation yet, but there is a short PDF describing it in press release language. Of course such documents are no substitute for examining the actual text. +++ Now, what exactly it means is unclear, but to federalize computer security is just one more means of demanding a backdoor into your network, computers, and systems by and to the feds. Clinton wanted it, and people got up in arms. This has gotten zero press. insert witty tagline here - Original Message - From: Rick Kunze rku...@colusanet.com To: WISPA General List wireless@wispa.org Sent: Monday, April 06, 2009 8:57 AM Subject: Re: [WISPA] Big Brother's coming... WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
[WISPA] 3.65 New Player
Proxim Tsunami MP.16 has been FCC aproved for 3.65 ghz http://www.proxim.com/products/mp16/index.html Seems like all other solutions, all outdoor Base, inlcudes GPS sync Nice Html interface with lots of features, like vlan trunk and access mode. NAT on the SM Gino A. Villarini g...@aeronetpr.com Aeronet Wireless Broadband Corp. tel 787.273.4143 fax 787.273.4145 WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] getting up to speed on various PtP microwave solutions
Charles Wu wrote: Attached is an article that gives Licensed Backhaul 101 Overview that was written several years ago in Broadband Wireless Magazine -- obviously, pricing for licensed links have fallen dramatically...but the concepts are still the same Thanks, this is helpful also. I like the way it breaks it down into 6-11 GHz, 18-23 GHz, 24 GHz, and 39 GHz solutions. WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] getting up to speed on various PtP microwave solutions
It's probably a nice general overview... but some things are missing/wrong: There is conditional licensing in the 23GHz band... but it is a narrow part of the band. If you can't get the conditional approval... approval can take up to a year... not just 6 months. On the plus side you can use as small as a 1ft dish in 23GHz. 18GHz requires at a minimum of a 2ft dish. There are also exclusion zones around Denver, CO and Washington DC for the use of this band. 11GHz technically requires the use of a 3ft dish, although secondary use of the band can be had with as small as a 2ft dish... which usually isn't a problem. 6GHz requires at a minimum a 6ft dish. 38/39GHz still has a lot of used Stratex/Ceragon equipment on the market... but the cost of those licenses can vary wildly. While I have deployed many links in this spectrum since it used to be dirt cheap around Denver... I would probably avoid it now. In the long run... you will probably be best off having someone engineer the links for you... which any vendor (including myself) should be able to do for you. Daniel White 3-dB Networks http://www.3dbnetworks.com -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of Rogelio Sent: Monday, April 06, 2009 10:44 AM To: Charles Wu Cc: WISPA General List Subject: Re: [WISPA] getting up to speed on various PtP microwave solutions Charles Wu wrote: Attached is an article that gives Licensed Backhaul 101 Overview that was written several years ago in Broadband Wireless Magazine -- obviously, pricing for licensed links have fallen dramatically...but the concepts are still the same Thanks, this is helpful also. I like the way it breaks it down into 6-11 GHz, 18-23 GHz, 24 GHz, and 39 GHz solutions. WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] Trango Giga Problem
Trango is not clear on the algorythm's exact details they use to calculate MSE. (I personally believe that is intentional, as it is sorta like a proprietary trade secret, but nobody has said that). What we do know is MSE is the method to evaluated link quality and noise via a single parameter value, to make it easy. The point that I am making is... We should not automatically assume the problem is correctable by radio settings, or possibly assume problem with a radio. Our experience has shown the opposite. Nor should we assume the answer is APEX, when a Giga gets a low MSE. Travis is right about the Apex being a fine radio with excellent value, probably a first choice for many, but there are still many reasons where a Giga is more appropriate to use, and Giga still offers excellent value, and reliable operation. If the MSE is low, (below 32), then there is usually a problem needing addressed. It can be... 1) an antenna moving out of alignment. Note that misalignment may not always reflect itself via lost RSSI, but could also result in picking up more interference or multi-path in some cases, causing degrated MSE. 2) new noise. The first step for troubleshooting, is to disable every advanced feature like AGC, ATPC, Auto Modulation Adjust. Hard set Transmit power and Modulation to a conservative level. That means lower modulation, and that means also slightly lower power, just to rule out transmitter/receive overload, even though at the expense that maybe your RSSI might now be closer to the suspect noise. Also shrink your channel size. If you have a 40Mhz channel, switch to using only 10-20Mhz, to again create more isolation from adjacent channel noise. Sure all these things would take time, and result in short downtime, when radios reconfigured for this. But they are ways to isolate noise Before suspecting a Radio itself or incurring any large cost, like a tower climb, radio repurchase, or a New Freq Coord. There are a couple of ways Noise could be generated by others, even if they responisbly did Freq Coords. For example, what if they got a Verticle Pol Freq Coord, but the installer got confused and accidentally mounted in Horizontal Pol, thinking they were on their allocated channel, but actually they weren't? And also double check that your installer did not make that mistake. Brad made a good point, that it should not be a first choice to change Channels, as that could cause interference with another Licensee. I'd explore all other options first. The ethical thing todo would be to determine what channel is still free from your Freq Coordinator, prior to doing that. I made the suggestion based on... I had multiple links on thesame path, so I could turn down the other link, to borrow the cahannel for testing. That may not be as expensive or hard as some think. For example, when you get your Freq Coord, they may deterine 1 or 2 free channels, so there is a backup channel, in case there was an objection during the PON process for the first one selected (Its easier to assign a different channel, that to negotiate a dispute, and easier to get more info in the original freq Coord, than go back later to repeat it.). So they may already have a record of additional unused channels, or for that matter ones that were not free to avoid. They also have a record of any newer PONs that were sent out in your area. So if no new PONs were sent, the old Freq Cord info would still be relevent and accurate. We also found that at the higher freqs, loss is not always symetrical, dependant on misalignment of one side. With 2 degree beamwidths it can be hard to tell if a antenna moved visually. For example, in one of our cases... We took great care to inspect the antenna mount to the pole, because we mounted to less than 4 dia pole, and wanted to make sure it was secure for long term. But we forgot to inspect the mounts holding the pole to the super structure. And as it turned out, it was the pole itself that moved. Tom DeReggi RapidDSL Wireless, Inc IntAirNet- Fixed Wireless Broadband - Original Message - From: Gino Villarini g...@aeronetpr.com To: WISPA General List wireless@wispa.org Sent: Sunday, April 05, 2009 12:26 PM Subject: Re: [WISPA] Trango Giga Problem Travis, I assume the Apex Calculates the MSE, and you dont have to input any cable loss figures Got the Apex Manual handy that you can send offlist?, thanks Gino A. Villarini g...@aeronetpr.com Aeronet Wireless Broadband Corp. tel 787.273.4143 fax 787.273.4145 From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of Travis Johnson Sent: Sunday, April 05, 2009 12:17 PM To: WISPA General List Subject: Re: [WISPA] Trango Giga Problem Brad, We put 3 Apex units up about 4 months ago. They are basically the same as the Giga, with only a few minor differences. The only frustrating part for us was
Re: [WISPA] Big Brother's coming...
Tom DeReggi wrote: Next thing you know, in real time, every time you pass a traffic light, they'll also be checking instant verification on or License Plate Scanners http://www.itemlive.com/articles/2009/02/09/news/news01.txt WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] Big Brother's coming...
They have just equipped the street sweepers here in DC with a similar system to catch parking violators using automated tag reading. Patrick Shoemaker Vector Data Systems LLC shoemak...@vectordatasystems.com office: (301) 358-1690 x36 http://www.vectordatasystems.com George Rogato wrote: Tom DeReggi wrote: Next thing you know, in real time, every time you pass a traffic light, they'll also be checking instant verification on or License Plate Scanners http://www.itemlive.com/articles/2009/02/09/news/news01.txt WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] Trango Giga Problem
Tom Great Piece of info, I was able to lower my channel size from 40 to 10, I lowered my modulation to qpsk, disabled all auto features and set the power to 10 db This are my numbers now: (similar on both ends) (trango-config)# linktest 10 LOCK RSSI MSEBER 1 1 -36.00 dBm -34.57 dB 0.00E+00 2 1 -36.00 dBm -34.57 dB 0.00E+00 3 1 -36.00 dBm -34.60 dB 0.00E+00 4 1 -36.00 dBm -34.63 dB 0.00E+00 5 1 -36.00 dBm -34.52 dB 0.00E+00 6 1 -36.00 dBm -34.56 dB 0.00E+00 7 1 -36.00 dBm -34.53 dB 0.00E+00 8 1 -36.00 dBm -34.60 dB 0.00E+00 9 1 -36.00 dBm -34.55 dB 0.00E+00 10 1 -36.00 dBm -34.63 dB 0.00E+00 (trango-config)# I'll start upping modulation and channel size and confirm where I start to have problems, anyone thinks this is interference? BTW: what (HI) means: 65 1 -37.00 dBm (HI) -34.31 dB 0.00E+00 Gino A. Villarini g...@aeronetpr.com Aeronet Wireless Broadband Corp. tel 787.273.4143 fax 787.273.4145 -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of Tom DeReggi Sent: Monday, April 06, 2009 1:25 PM To: WISPA General List Subject: Re: [WISPA] Trango Giga Problem Trango is not clear on the algorythm's exact details they use to calculate MSE. (I personally believe that is intentional, as it is sorta like a proprietary trade secret, but nobody has said that). What we do know is MSE is the method to evaluated link quality and noise via a single parameter value, to make it easy. The point that I am making is... We should not automatically assume the problem is correctable by radio settings, or possibly assume problem with a radio. Our experience has shown the opposite. Nor should we assume the answer is APEX, when a Giga gets a low MSE. Travis is right about the Apex being a fine radio with excellent value, probably a first choice for many, but there are still many reasons where a Giga is more appropriate to use, and Giga still offers excellent value, and reliable operation. If the MSE is low, (below 32), then there is usually a problem needing addressed. It can be... 1) an antenna moving out of alignment. Note that misalignment may not always reflect itself via lost RSSI, but could also result in picking up more interference or multi-path in some cases, causing degrated MSE. 2) new noise. The first step for troubleshooting, is to disable every advanced feature like AGC, ATPC, Auto Modulation Adjust. Hard set Transmit power and Modulation to a conservative level. That means lower modulation, and that means also slightly lower power, just to rule out transmitter/receive overload, even though at the expense that maybe your RSSI might now be closer to the suspect noise. Also shrink your channel size. If you have a 40Mhz channel, switch to using only 10-20Mhz, to again create more isolation from adjacent channel noise. Sure all these things would take time, and result in short downtime, when radios reconfigured for this. But they are ways to isolate noise Before suspecting a Radio itself or incurring any large cost, like a tower climb, radio repurchase, or a New Freq Coord. There are a couple of ways Noise could be generated by others, even if they responisbly did Freq Coords. For example, what if they got a Verticle Pol Freq Coord, but the installer got confused and accidentally mounted in Horizontal Pol, thinking they were on their allocated channel, but actually they weren't? And also double check that your installer did not make that mistake. Brad made a good point, that it should not be a first choice to change Channels, as that could cause interference with another Licensee. I'd explore all other options first. The ethical thing todo would be to determine what channel is still free from your Freq Coordinator, prior to doing that. I made the suggestion based on... I had multiple links on thesame path, so I could turn down the other link, to borrow the cahannel for testing. That may not be as expensive or hard as some think. For example, when you get your Freq Coord, they may deterine 1 or 2 free channels, so there is a backup channel, in case there was an objection during the PON process for the first one selected (Its easier to assign a different channel, that to negotiate a dispute, and easier to get more info in the original freq Coord, than go back later to repeat it.). So they may already have a record of additional unused channels, or for that matter ones that were not free to avoid. They also have a record of any newer PONs that were sent out in your area. So if no new PONs were sent, the old Freq Cord info would still be relevent and accurate. We also found that at the higher freqs, loss is not always symetrical, dependant on misalignment of one side.
Re: [WISPA] Big Brother's coming...
License Plate Scanners Geesh... Its already here! Thats scary. What ever happened to probable cause? Who is it going to be left up to to define suspicious? That is Harrassment ready to happen. I was all fine with the 1 unit per station to encourage use for a sole purpose, such as identifying cars, when it snowed. The scary part was the closing statement we want to verify the return on investment before buying more. Which infers measurment on city's financial gain, not public good. The truth is... A license plate scanner, is no different than what is done already manualy. If an officer notices something suspicious, they call it in, and wait for a response. The major difference is, the old way takes time and effort, and therefore the officer thinks twice before prematurely harassing a driver, and only calls it in, if there is a legitimate concern to call it in and verify the plate. The problem now is... its just to easy. It will likely encourage abuse. With that said, I'll close by saying I'd rather see Police Officier's with scanners, than Street light poles. Atleast then there is some human intervention and descretion, to justify a scan. And I'd like to think that we can trust our local Police Officer's to use them with good intent, to protect apposed to harrass. And that consumers will do their best to be lawful. I'm not sure what bothers me more... Invasion of privacy issues, or if I just don't like law inforcement automated by robots. Tom DeReggi RapidDSL Wireless, Inc IntAirNet- Fixed Wireless Broadband - Original Message - From: George Rogato wi...@oregonfast.net To: WISPA General List wireless@wispa.org Sent: Monday, April 06, 2009 2:12 PM Subject: Re: [WISPA] Big Brother's coming... Tom DeReggi wrote: Next thing you know, in real time, every time you pass a traffic light, they'll also be checking instant verification on or License Plate Scanners http://www.itemlive.com/articles/2009/02/09/news/news01.txt WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] 3.65 New Player
Don't know about quality or feature comparison, but at a quick glance it looks like they are significantly more expensive than Tranzeo. Can anyone give a good comparison as to which would be better for the money, or at least what features the Proxim is going to have that would justify the higher expense? I'm assuming nobody has deployed the Proxim solution yet, at least not for long. We're looking hard at a 3650 solution right now and have yet to make a decision, but Tranzeo's starter kits are sure appealing at the price point they are at. -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of Gino Villarini Sent: Monday, April 06, 2009 11:24 AM To: Motorola Canopy User Group; WISPA General List Subject: [WISPA] 3.65 New Player Proxim Tsunami MP.16 has been FCC aproved for 3.65 ghz http://www.proxim.com/products/mp16/index.html Seems like all other solutions, all outdoor Base, inlcudes GPS sync Nice Html interface with lots of features, like vlan trunk and access mode. NAT on the SM Gino A. Villarini g...@aeronetpr.com Aeronet Wireless Broadband Corp. tel 787.273.4143 fax 787.273.4145 WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] getting up to speed on various PtP microwave solutions
Hi Daniel, It's probably a nice general overview... but some things are missing/wrong: The rules have changed over the last 5 years since the articles were written -Charles WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
