Thanks for pointing that out.. I did not know.. never had the need to pay attention to it... for some reason always thought of using 11Ghz for LD links...
:) Faisal Imtiaz Snappy Internet & Telecom 7266 SW 48 Street Miami, FL 33155 Tel: 305 663 5518 x 232 Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net > From: "Hardy, Tim" <tha...@comsearch.com> > To: af@afmug.com > Sent: Wednesday, January 25, 2017 12:11:55 PM > Subject: Re: [AFMUG] B11, TDMA, and TCP > 2’ is the minimum allowable antenna size at 11 GHz. > From: Af [mailto:af-boun...@afmug.com] On Behalf Of Faisal Imtiaz > Sent: Wednesday, January 25, 2017 11:42 AM > To: af@afmug.com > Subject: Re: [AFMUG] B11, TDMA, and TCP > Wow... that is a short link for 11ghz.. > what size dishes are you using ? 2ft or 1ft ? please tell me 1ft... > Are your B11's reporting to the Cloud ? there are more stats which get exposed > on the Mimosa Cloud App. > I was seeing some strange performance issues.. sort of similar to yours.. (you > can see details from my post in the Mimosa Community Forms). > Someone pointed out that B11's like to have SNR between 32-35, when it is > lower > or higher they have modulations issues.. > My performance improved after we turned the power down.. my link was a bit > longer.. 3.9 miles (6.3km) with 2ft dishes, ... > and yes, they do not go below 10dBm on tx power... > maybe some sort of a material on the radome to reduce energy ? > Regards. > Faisal Imtiaz > Snappy Internet & Telecom > 7266 SW 48 Street > Miami, FL 33155 > Tel: 305 663 5518 x 232 > Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net >> From: "Chris Wright" < ch...@velociter.net > >> To: af@afmug.com >> Sent: Wednesday, January 25, 2017 11:21:12 AM >> Subject: Re: [AFMUG] B11, TDMA, and TCP >> Power is already at the minimum (10dBm) on both sides. 2.2km link. >> Chris Wright >> Network Administrator >> From: Af [ mailto:af-boun...@afmug.com ] On Behalf Of Faisal Imtiaz >> Sent: Tuesday, January 24, 2017 9:56 PM >> To: af@afmug.com >> Subject: Re: [AFMUG] B11, TDMA, and TCP >> > SNR 41, 42, 41, 41 >> Turn down your power, and bring the SNR in the 30-35 range... >> it will improve thruput and allow for the higher modulation. >> Regards. >> Faisal Imtiaz >> Snappy Internet & Telecom >> 7266 SW 48 Street >> Miami, FL 33155 >> Tel: 305 663 5518 x 232 >> Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net >>> From: "Chris Wright" < ch...@velociter.net > >>> To: af@afmug.com >>> Sent: Wednesday, January 25, 2017 12:41:37 AM >>> Subject: Re: [AFMUG] B11, TDMA, and TCP >>> Firmware 1.4.4 >>> SNR 41, 42, 41, 41 >>> Flow Control had no effect so it remains disabled for now. >>> Sent via mobile phone. >>> On Jan 24, 2017, at 9:05 PM, Faisal Imtiaz < fai...@snappytelecom.net > >>> wrote: >>>> What version for firmware is on the radio ? >>>> and What your SNR on the two chains (both directions, i.e. 4 readings). >>>> I can tell you that we do not see the behavior you are describing below... >>>> But I can also tell you that we had to do some 'tuning' on settings >>>> including >>>> flow control .. >>>> our B11's plug into netonix Switches.... >>>> Regards. >>>> Faisal Imtiaz >>>> Snappy Internet & Telecom >>>> 7266 SW 48 Street >>>> Miami, FL 33155 >>>> Tel: 305 663 5518 x 232 >>>> Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net >>>>> From: "Chris Wright" < ch...@velociter.net > >>>>> To: af@afmug.com >>>>> Sent: Tuesday, January 24, 2017 8:02:58 PM >>>>> Subject: [AFMUG] B11, TDMA, and TCP >>>>> According to Mimosa, I should be telling my customers that if they’re >>>>> using the >>>>> most popular metric in the world for testing internet speeds, they’re >>>>> doing it >>>>> wrong (I concede that while this may be technically correct, my customers >>>>> – and >>>>> yours too – don’t do technically correct very well.” >>>>> When TDMA is set to 75/25, 8ms window, MAC Tx/Rx is 980/290. This gives >>>>> me as >>>>> much Tx bandwidth as I require for peak times, but no one client IP can >>>>> download more than 20mbps of TCP traffic (from my speedtest.net at the >>>>> edge, >>>>> nor anyone else’s beyond my edge). >>>>> When TDMA is Auto, MAC Tx/Rx is 780/780 (lower Tx, which is undesirable >>>>> as it’s >>>>> 100mbps shy of what I need during peak hours), but TCP throughput per >>>>> client is >>>>> greatly increased (150+mbps). >>>>> So I’m in a pickle. Either my scrupulous customers can get those coveted >>>>> speedtest.net results they love seeing as they run them every thirty >>>>> seconds >>>>> ad-nauseum at the cost of overall Tx capacity of the link. Or I give >>>>> myself >>>>> some headroom in link capacity but the fastest speeds my 100mbps clients >>>>> can >>>>> see is 20mbps. >>>>> What’s even stranger is that client upload seems unaffected. I can upload >>>>> 150+mbps from my test on the link no matter what TDMA is configured. I >>>>> hit up >>>>> Mimosa’s chat support was as chipper as they were unyielding in their >>>>> idea that >>>>> I should test in a way that caters to the B11’s shortcomings. I’ve been a >>>>> Mimosa fanboy for a while now but boy am I feeling burned right now. >>>>> Chris Wright >>>>> Network Administrator
