Am 2004-04-11 05:03:38, schrieb Arnt Karlsen: >On Fri, 9 Apr 2004 21:10:44 +0200, Michelle wrote in message ><[EMAIL PROTECTED]>:
>> The 54 MBit are only Theory ! >> Practical you can get around 40 MBit for each channel. > >..riiiiiiight, dream on. Say 20Mbps and I'll agree. ;-) Do you dream from Netgear or D-Link ? I have a Proxim Tsunami MP.11a installed in Strasbourg. THE COR is installed in Neudorf and the ROR in the Center of Strasbourg on a Tower. The Link has 40 MBit effectiv. And curently ther are between 6 and 18 Users whic use it without traffic shaping. Then I have probs with WarDrivers which use my 2 MBit ADSL too ;-) My Traffic counter (ipac-ng) is working very good ! I it works realy good. But I think, you do not know abour the differenc between a D-Link/ Netgear and an ORINOCO/Tsunami system. The HighEnd system are 20-40 times more expensive but there is realy more power. >..my experience with isp's, is, set up proxy servers and spam weed Yes, I think, a big proxY is neccesarily... >..booo, I said "steam" like in vapor, not "steamy" like in raunchy. ;-) ... >..so, we return to sizes, weights, and power etc requirements. ;-) > >> 1) If I have only a NetworkCenter (4 x OC-3) for my CyberCenter >> project, I need only RadioBridges which supports E1, E2 and >> E3 and OC-3 >> >> 2) If I support paralel to 1) commercial Users (End and ISP), I >> need a bigger Backbone like 2 x 1 GBit which mean, I need >> GBit RadioBridges maybe up to 1,8 GBit too. > >..you meant http://www.wirelessguys.com/ ;-) >They carry the above gear? Yes I was in there Website... ;-) Realy nice the 360° Beamer (entry page) with 8 channels ;-) Was 25.000 US$ I think >> The price is realy heavy (around 27.000 US$ each ) and they >> support not more the 20km and you need many Briges... > >..huh? They do support line of sight? 60000ft ~ 20km, that's _up_. >Assuming you are correct about their 20 km signal path loss range, >keep in mind that their 20 km is _along_ the surface, say across the >sea, where the air is nice and thick. Signal loss from your ground >station up to my relay drone, will be proportional to the air density >_along_ the signal path. No, I was thinking, that I uase the RadioBridges between my POP's in Maroc, because for the monthly Price of a 34 MBit LeasdLine I can buy 1 1/2 RadioBridges OC-3 (twelf month are around 360 km) Cabling the POP's are more expensive as the RadioBridges. >..now, pointing you ground station antennas up say at 11 degrees >elevation to point at my relay at say 20km altitude to match your sea >level signal loss, and then down on the other side at a similar angle, >takes you how far? ;-) This is a SatelitLink ? I know one here in Strasbourg which use Tiscali SkyDSL 1024/256kBit. And is realy fast... and I think, the reaction time is good. Like to know more about your system. >> I was thinking about minimum two independant and 100% redunant ISP's. > >..cool, 2 or more drones in the air, and several ground stations etc. Yes, why not... But whats the price of GrondStations ? And whats the speed of each channel ? >..or, are you setting up _several_ isp's, or are you setting up several >_route_ isp's to serve the _one_ isp you have made the 26 boxes for? hmmm... >> >..fiber you know, relay drones loiter at altitude with line of sight >> ^^^^^^^^^^^^ >> You mean via Satelit ? > >..close, like in "big model airplane carrying pc's" or AP's set up >as bridges. The airframe would be a slow high flying wing with >an autopilot, to make a flying robot relay drone. ;-) ??? - Never herd about it ! :-/ >..for anything past 99.9% 24/7 service, I say 3 drones minimum, one >airborne in service, one ready for takeoff, and "one in the work shop". >For every additional link serviced, add one airborne relay in service, >and depending on distances to, and between relay loiter points, >service policy etc, consider launching flying spares. Now I understood how it works... >..also, consider traditional wifi grids, high altitude relay drones can >join these, and span them, and span several of these grids, and >can form back bone grids. A single point failure becomes less This is what I not understand... The drones are working with the 802.11g standard ? >problematic, as traffic can be re-routed until a new drone is up >and takes over the loiter point. Yes right, and it mean, that each AP must have two antennas, one to receive the signal from the drones and a second which distribute it to the customers ? >> I can use the Proxim Tsunami MP.11a which sopports with the >> Outdoor Router Software upgrade Traffic Shaping from 64 kBit >> to some MBit (do not know exactly) > >..yup, failing that, I have http://fmb.no/ipcop/setup-cbq-0.0.5.tar.bz2 >which could use a web interface, and a wee linux box to run on to >trottle the bridged links, I would prefer to have the airframe controls >separated from the payload bits, here, we rocket scientists are a bit >conservative. ;-) ;-) Drop me some lines PM about pricing... Greetings Michelle -- Registered Linux-User #280138 with the Linux Counter, http://counter.li.org/
