Yes. 20MHz channel. but uses H-pol and V-pol
Daniel White 3-dB Networks http://www.3dbnetworks.com From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of Travis Johnson Sent: Saturday, October 31, 2009 9:57 AM To: WISPA General List Subject: Re: [WISPA] Backhaul Questions Hi, Does the Radwin require dual-polarity antennas? How large of channel size to get the 100Mbps? Travis Microserv 3-dB Networks wrote: Eric, I can only answer the non-MT questions :-) For roughly $3,700 you could get a Radwin 2000 link, which is a quad-band (2.4GHz, 5.2GHz, 5.4GHz, 5.8GHz) radio capable of 50Mbps each direction (or 100Mb aggregate). It does not support GPS sync, but instead supports HSS, which allows all co-located backhauls to be synced together. If your interested hit me offlist for more info. Any backhaul should technically support VoIP... the question becomes the PPS capability so you can determine how many calls at once you can handle. With 64 byte frames the Radwin 2000 can achieve 37,000 PPS... so it should handle most VoIP applications with no problems. QoS could also be important... but since it is a bridge you can prioritize at each end with MT routers. Radwin also offers QoS in the radio. IMHO... nothing supports any real throughput at 12 miles in the 5.4GHz band... legally. Personally I feel 5.4GHz is limited to more like 5 miles or so... although YMMV depending on the noise floor and the specific equipment/modulation used. I think Ligowave can technically get close to 60Mbps with a 40MHz channel... but 40MHz in one polarity is a lot to burn IMO. UbquiToy might be able to achieve the throughput... but I would check the PPS and strongly question the interference rejection capability. Daniel White 3-dB Networks http://www.3dbnetworks.com -----Original Message----- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of Eric Rogers Sent: Saturday, October 31, 2009 7:31 AM To: WISPA General List Subject: [WISPA] Backhaul Questions Ok guys...Looking for both Mikrotik experience and others. We currently have a Mikrotik backhaul between each of our towers using NStreme and we have been extremely happy with the performance. We recently upgraded a tower because we were hitting 15M or so during peak times and was afraid it couldn't handle much more. We upgraded that backhaul to a Motorola PTP for future capacity. The questions: MT Gurus: Each backhaul ranges in distance, each ranges from 3 miles (3 backhauls) and the rest are about 12 miles (5 backhauls). Since we have been using Mikrotik, I have reliably seen up to 10 Meg, and I am afraid 15 Meg is pushing the envelope on a 20 MHz channel. How much capacity can I reliably push on a 20 MHz channel using NStreme? Other Gurus: I understand the following are loaded questions, but budget is around $1000-3000 range and the capacity needs to be around the 60Meg mark (30 each way or without a defined 1:1 guarantee, capability to flex and be able to push 30M each way). If I start upgrading to larger backhauls on busy links, what type of equipment should I look at? What can support VoIP? Anything that GPS times for frequency reuse? Anything work in the 5.4GHz range at a 12 mile distance? Eric Rogers Precision Data Solutions, LLC (317) 831-3000 x200 ------------------------------------------------------------------------ -------- 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 Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
