I hate to tell you your tests are flawed... I have in excess of 70MB TCP passing between two towers 30 miles apart with Rocket M5 and 20Mhz channels.
If you only got 39Mbs you have a problem and it isn't the radios. That being said, I have radios running MT with N and 20Mhx channel that double your throughput tests live on towers too... Scott Carullo Technical Operations 877-804-3001 x102 ---------------------------------------- From: "Vyacheslav Vasilyev" <s...@unidata.com.ua> Sent: Saturday, September 04, 2010 5:38 PM To: fai...@snappydsl.net, "WISPA General List" <wireless@wispa.org> Subject: Re: [WISPA] mikrotik vs ubiquiti We have tested RB 411AH, (AR7161 680MHz, RAM 64 MB), miniPCI R52Hn (AR9220 802.11n, OS Mikrotik v.4.6 and UNBT Rocket M5 (Atheros MIPS 24KC, 400MHz) 1) LAB tests (connection via coax cable with attenuators) -max duplex throughput (iperf udp, 1470 bytes payload ) in 20 MHz channel bandwidth, MIMO 2x2 Tx/Rx Rate 130/130 of RB/R52Hn ( Nstreme Off ) is 49 Mbps duplex , Rocket -39 Mbps - max duplex throughput at 64 bytes UDP packet size is reduced for RB to 6.8 Mbps duplex, Rocket - 5.7 Mbps duplex. Throughput at small packets size of both devices is the same in 20 , 40 MHz channel bandwidth, and does not depend on using 1 or 2 chains. We noticed that internal bandwidth test ( between wireless interfaces ) at small packets shows much higher throughput than via Ethernet+wireless. - RB pps is higher than Rocket and is equal approx 28K ( in + out) in lab. Rocket has about 24K. Max pps does not depends on channel size 20 or 40, 1 or 2 chains, In comparison we tested in lab the same board RB411AH with CM9 802.11a card ( Nstreme On, packet aggregation frame policy is 3200). In this mode unit has 39K pps. In Nstreme off mode this unit has only 4K pps. Vyacheslav Vasilyev UNIDATA Fixed BWA solution
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