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Hi, We currently have five 18ghz links... two have been up for almost 4 years with less than 30 minutes downtime total. 1 - 7 miles, 2ft dishes, 99.9999% calc'd uptime, so far correct (4 years) 2 - 19 miles, 4ft dishes, 99.999% calc'd uptime, so far correct (4 years) 3 - 14 miles, 2.5ft dishes, 99.999% calc'd uptime, so far correct (8 months) 4 - 15 miles, 2.5ft dishes, 99.999% calc'd uptime, so far correct (8 months) 5 - 28 miles, 2ft dishes, 99.99% calc'd uptime, so far correct (4 months) We have not seen any multi-path issues with any 18ghz links. We are always able to get 1-2db better signal than the path calc shows, but it can take a little time (the 27 mile link took almost an hour to fully align, compared with 10-15 minutes for the other links). We are in the 12mm/h rain zone. Travis Microserv Tom DeReggi wrote: So what are you guy finding regarding 18Ghz multi-path. What we learned over this past year is that multipath for Millimeter Wave and high Spectrum ranges, is a different animal. Very picky. 18Ghz specifically is known for negative effects of reflection, that need to be taken into account in isntalltion design.Any success rates on wall mounting? Are your links path calc'd for 2ft dish working with 2 ft, as engineered? Etc. Are you getting 3- 9s engineering 3- 9's? This question isn;t about gear, its about 18Ghz. (Note if mention distance, please mention rain zone) Tom DeReggi RapidDSL & Wireless, Inc IntAirNet- Fixed Wireless Broadband ----- Original Message ----- From: "Chuck McCown - 2" <[EMAIL PROTECTED]> To: "WISPA General List" <wireless@wispa.org> Sent: Wednesday, January 16, 2008 12:24 AM Subject: Re: [WISPA] Looking for short licensed linkI wish we could say the same about the Trango. So far nothing but flaky behavior and that is with -44 dBm rx signal levels. But this is a new product to us and there may be something we are not configuring properly. Not going to count it out until the factory guys have had a chance to exhaust their remedies. ----- Original Message ----- From: "Tom DeReggi" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]>; "WISPA General List" <wireless@wispa.org> Sent: Tuesday, January 15, 2008 10:15 PM Subject: Re: [WISPA] Looking for short licensed linkThe Trango is solid as a rock, also. Trango is a great product, for a basic config, meaning 1 link, w/ 1 antenna and radio per side, under 300mbps. I was nothing but impressed with our units. Dragonwave currently has the lead from the perspective of supporting all the freq ranges in a single paltform, best adaptive modulation routines, and ability to combine radios on a single antenna to double capacity. But there is a price to that. If those feature aren't needed? Cable Free is also a great product, if you are planning on daisy chaining several links, the flexibilty and cost savings of these units are fantastic. Also very impressed with the overall design of their system. (Only negative I found was no adaptive modulation) Tom DeReggi RapidDSL & Wireless, Inc IntAirNet- Fixed Wireless Broadband ----- Original Message ----- From: <[EMAIL PROTECTED]> To: "WISPA General List" <wireless@wispa.org> Sent: Tuesday, January 15, 2008 11:52 AM Subject: Re: [WISPA] Looking for short licensed linkMatt I have installed over 50 Dragonwave links in the past 24 months. 1 outage the result of equipment failure and I had a replacement in my hand the next day from Canada. Airpair goes up to 200 Meg. FD. Horizon will do 600 plus. Multiple IDU. ODU architecture. You could do 200 MB Horizon for your budget. I have no experience with the trango. Bob Sent from my Verizon Wireless BlackBerry -----Original Message----- From: "Chuck McCown" <[EMAIL PROTECTED]> Date: Tue, 15 Jan 2008 08:47:10 To:"WISPA General List" <wireless@wispa.org> Subject: Re: [WISPA] Looking for short licensed link I have used the Trango GigaLink and DragonWave. DragonWave is rock solid. Never a problem. Have several systems. We are still trying to get the Trango to play. Lots of signal but not running well at all. ----- Original Message ----- From: "Travis Johnson" <[EMAIL PROTECTED]> To: "WISPA General List" <wireless@wispa.org> Sent: Tuesday, January 15, 2008 8:44 AM Subject: Re: [WISPA] Looking for short licensed link |
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