Hi Bob, >I don't think Trango will be a good fit considering the 20-25 mile link >distances, 18 Ghz. and the reduced tx power compared to others in the >lower bands.
You forget that Travis lives in "RF Nirvana" In RF Nirvana, 38 GHz goes 15 miles and 18 GHz 30 miles with 99.999% uptime -Charles Travis Johnson wrote: > Take a look at the Trango GigaLink and APEX radios. They make both an > IDU/ODU and just an ODU option. > > We just installed the APEX 18ghz systems. At one location we used the > "fiber" option and it works great. You can contact them directly > (www.trangobroadband.com) or contact Charles @ CTI. They are selling the > 18ghz version with 2ft dishes for $9,995 right now (complete link). > > Travis > Microserv > > Paolo Di Francesco wrote: > >> Dear All, >> >> we are considering to move to licensed frequencies for back hauling and >> therefore some hints would be really appreciated. We are looking at 2 >> main manufacturers (Ceragon/Dragonwave) so the problem is "which one >> fits better for our needs"? >> >> Just to summarize: >> >> a) links are around 20-25 miles >> b) antennas: the smaller the better >> c) robustness is very important >> d) average life: 3 years >> >> >From what I have read in the data sheets I have done the following >> considerations: >> >> 1) Dragonwave Horizon is nice but only if your site is well protected >> from "sabotage and stealing". The "all outdoor" approach is nice but it >> has the drawback that if somebody takes the whole unit they will have a >> brand new unit working. With the IDU/ODU approach they will have only >> half of the "banknote", so after the first or second time, they will not >> spend time having something useless. >> 2) Dragonwave Horizon can be a problem if you don't use fiber from the >> unit down to your switch. In few words, we have sites with huge amount >> or EM fields, so even using shielded cables (e.g. Belden 1300A) we get >> only few ethernet megabits. So we should use fiber to go up the tower, >> but maybe be IDU/ODU approach is more robust (comments welcome). >> 3) All outdoor means that when you have to re-use the devices somewhere >> else, you have to buy a whole new thing instead of just swapping the ODU. >> 4) In any case the (all outdoor or IDU/ODU) when the tower is frozen >> (and when I mean frozen I mean a whole block of ice) then it does not >> change much, you have to wait the better season to work on that. >> 5) Performances look more or less the same. >> 6) I don't know much about prices, I have looked on some website, I am >> still exploring this aspect >> 7) Is anybody using the software-switch capabilities on this devices or >> just using them as transparent bridges for your router/switch? Do you >> need to reset them often? >> >> Comments are welcome. >> >> Am I missing some other good brand? >> >> Thank you. >> >> >> > > > -------------------------------------------------------------------------------- > 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/ This message is intended only for the use of the individual or entity to which it is addressed and may contain information that is privileged, confidential and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, or the employee or agent responsible for delivery of the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by telephone at 630-344-1586. -------------------------------------------------------------------------------- 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/
