Stealthwave
join:2005-07-03
Alvin, TX
| reply to skymaster
Re: 900mhz channel scan
Not true!
Frankly low cost 900 is not worth the time to deploy due to it's performance limitations and low subscriber per AP count. With Canopy you can put 70 subscribers on an AP, operate in a higher noise floor environment, co-locate multiple AP's in the same area or same tower, and have peace of mind that the equipment is rock solid.
I know 2 companies running in my area with Moto 900 and the are having hell interferance with each other.
Trango sucked in my area cause Moto was stomping it. |
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dongato17
VIP
join:2000-07-28
Atlanta, GA
| I think different hardware has its place in different situations. You may not be able to put 70 subs/AP due to density or terrain, or you may need higher throughput than what Canopy 900 can offer. In these situations, using something other than Canopy could make sense.
Trying hard not to sound like an ad...we have found that a modified MAC works much better than standards-based converted 802.11b/g. We have implemented this on our PTP platform and are porting it now to our PtMP platform. One big downside to standard 802.11 900MHz is the number of false CCA triggers. This really kills performance and reliability.
-Hal
--
Harold Bledsoe
Ligowave
»www.ligowave.com |
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EMC_guy
join:2007-10-13
Sharbot Lake, ON
 ·Rogers Hi-Speed
| reply to Stealthwave
said by Stealthwave  :With Canopy you can put 70 subscribers on an AP, operate in a higher noise floor environment, co-locate multiple AP's in the same area ... ... I know 2 companies running in my area with Moto 900 and the are having hell interferance with each other You are contradicting yourself?
Anyway the old Motorola Canopy 900Mhz system has no RF magic inside. Rather they use BFSK modulation which has lowest signal-to-noise requirement but also lowest data rate and most inefficient use of spectrum of all modulations. However they use a more efficient MAC than 802.11 since it was designed for fixed-wireless deployments rather than wireless LANs. |
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cmaenginsb
Premium,MVM
join:2001-03-19
Palmdale, CA
| said by EMC_guy :said by Stealthwave :With Canopy you can put 70 subscribers on an AP, operate in a higher noise floor environment, co-locate multiple AP's in the same area ... ... I know 2 companies running in my area with Moto 900 and the are having hell interferance with each other You are contradicting yourself? Anyway the old Motorola Canopy 900Mhz system has no RF magic inside. Rather they use BFSK modulation which has lowest signal-to-noise requirement but also lowest data rate and most inefficient use of spectrum of all modulations. However they use a more efficient MAC than 802.11 since it was designed for fixed-wireless deployments rather than wireless LANs. EMC Guy, like me stealthwave misquoted. The upper part of "his" statement came from the poster 2 posts above.
Many times the low tech "old" way simply works better. |
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