Confusion reigned for a while. How much data is actually flowing?
Got out the USB cable and plugged it into my XP machine. Not cool. No software. Probably sitting on the router but XP cannot see it. So I went onto Neotel's site and downloaded it. Followed the manual's instructions.
OK, connect. More options. The software wsa setup for 1xEvDO and 1xRTT. Damn slow. RTT was sitting at -120dBm. That is in the league of strong GPS signals but not, to my knowledge, good enough for bi-directional comms. So I selected 1xEvDO only and restarted.
Definitely more speed. EvDO now sitting between -71dBm to -75dBm. Is that good? Don't know yet for this device. Later today I will get back onto the roof with the small 10.1inch laptop and tune the antenna.
Currently the EvDO singal is sitting mostly at -72dBm with the second one at max -89dBm and cutting out every so often. Not really part of the same team anymore. One interesting thing is that if I switch the antenna positions the signal strength goes down (well before I did the USB thing. Will have to check again) and it loses connection. The yagi is now plugged in on the righthand side. Might be a faulty connection. Will check it again later.
Did a few tests. Now minimum download speed is back upto 30kbytes/s, but doing the same tests as on Friday I actually achieved speeds of upto 150 kbytes/s. Keep in mind that I have done nothing apart from going from Ethernet/WIFI to USB (and sharing the connection). ... and forcing it to do EvDO only.
Didn't touch anything and did the same tests again. My own local site gives me 12kbytes/s download speed. Hmmmm. Where is my 150kbytes/s. Then I tried youtube.com. Max 17kbytes/s. Well, it is better than 3kbytes/s.
Another strange thing is that Windows reports the connection "link speed" at 230kbits/s max, but there are instances where both DUmeter and DAP9 reports speeds way faster than this link speed. An OS thing?
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I am atleast happy now to have the modem connected via USB. Now I have a single point of entry for all the computers and can fairly accurately meter my bandwidth.
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This yagi antenna option and the fact that there are 2 ports on the router opens up another possibility. I don't know if it is my imagination but when the second port goes as good as -89dBm then the download speed is faster. When it goes -90dBm (or off- does not report anymore) the speed is lower. Also, when I had the modem outside, with the yagi antenna plugged in the average speed was higher. So it appears that a better signal on the 'other' port increases speed. Will have to verify it. SO .... the option is.... to buy another yagi antenna and plug that into the second port. I will do that for the sake of experimentation but I have several problems with it. The first is the cost (which I had not planned to lay out), the eye-sore of yet another yagi (will be 4 them) on the roof and the fact that my wife will kick my butt if I spend more time and money chasing something that would have otherwise worked with Telkom ADSL.
But that still option remains. Here is the cheaper way if doing it. Crimp a RF connector on 50ohm coax cable and at the other end make yourselve a 1/4 wave antenna. That is about 9cm for 800MHz. Now many people think antennas are complex but only the real small ones are. My best GSM antenna is a 25cm whip antenna with a magnnetic base...and it costs R20. My most expensive one is a tiny ceramic 3D designed tri-band patch antenna wonder. That is when you worry about size, shape and fit (including how beautiful it is
As long as you stay away from even fractions like 1/2 waves and full waves then something simple as a 9cm (1/4 wave) or 27cm (3/4 wave) antenna should do the trick fairly well. You can probably make it very large, e.g. 189cm. There are other factors like VSWR, noise etc..., mechanical strength, how portable it is etc... to take into consideration but the option might just be a lot cheaper than R650 ex VAT per channel. Also, these type of antennas are fairly omni-directional which are easier to play with than yagis or dishes.
So, when I get the chance, I will play with cheap antenna options (seeing as these devices are not really portable) and post the results.
For those who are battling with their dataflex routers I suggest to get it connected to USB so you can view the status page.
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So am I happy? Not a chance. I bought an off the shelf solution that I have to hack to be able to connect. And even with these hacks I am still wayyyyyyyy below the promised specs, even the so-called average speeds, as advertised by Neotel. They should be ashamed.
VMS