MikroTik

talo1019

If it was a Power Amplifier issue.

Yes, one can fix it if you had the part and could solder it back on the board.

Having open antenna, high input power, lightning.....those could all affect the power amplifier.

talo1019

One possibility is the PA is damaged so the card will get hot.

talo1019

XR5 does have a higher powered at 28dBm.

Any technical related questions can be e-mailed to support {at} dbii.com

talo1019

Yes it does work, you just need the right wireless card.

6-6.2GHz is licensed in certain countries.

Currently nobody is using this particular frequency in the U.S. as it is more often used in the asian continents

talo1019

Hi Dallas,
It's part of the 11n standard for chipsets to support spatial diversity & spatial multiplexing.

talo1019

Isn't SXT a 5GHz a/n device while your tp-link TL-WN422G is a 2.4GHz b/g/n?

I don't think it has to do w/ the driver. You're AP should be a/b/g/n, that might help solve part of your problems.

talo1019

hi all i have a high site that is experiencing a strange problem. It has been running now for 3 years and has never had a problem. But within the last few months, the router board i have installed (rb433uah) just stops responding. winbox cannot detect it and we can still see that the ssids are avai...

talo1019

Hi flamuri,
Can you tell me what range you are using that's experiencing this problem? a/n or b/g/n

talo1019

May I ask the Rx issues that people are experiencing. Is this only for the 5ghz or 2.4ghz as well?

talo1019

Hi Koeks, Do you happen to have the MAC address and the 4 digit date code? The date code would start off with 09xx or 10xx. We did have some issues with date codes starting with 09xx that was mentioned on our website last year. It had to do with Rx. But on the other hand, we had other customers chan...

talo1019

What exactly are you looking for?

talo1019

Hi Fragation, Sometimes some customers experience a reboot b/c they're changing the default settings to manual Tx. This causes the card to operate above the power the card was designed for. The RouterOS doesn't properly display our power settings like the XR5. So what you see is not the actualy powe...

talo1019

Hi hidagar, We had some issues with our Rx previously, this was part of our recall that we did last year. Although I'm sure there are some that are still out there in the field. Any date code that starts with 09xx for the last 4 digits on the back of the card might experience these throughput and Rx...

talo1019

Try these 2 links
http://www.wiligear.com/?q=forum/topic/205
http://forum.mikrotik.com/viewtopic.php ... 90&start=0

talo1019

Alpha AWPCI085A, Dbii F20-PRO, Engenius EMP-8603, Unex CM10-HP are all cards you can try. But you should probably get a card that at least has ESD protection.

talo1019

No it's not normal. Please send me an e-mail to lawrence{at}dbii{dot}com and I can send you replacements.
Certain cases, based on other postings, nstreme turned off might affect it. I would have to know more details about your configuration to better understand what is going on.

talo1019

All the Rx for most of the cards now are near -97. Remember the engenius card also has an offset, if you change the power levels outside of default you will be over driving the cards and might damage them. R5H and XR5 show the true powers.

talo1019

Yes, Realtek tends to be a cheaper chipset and most outdoor wireless systems are specifically designed for Atheros chipsets. Unless more providers (software developers and companies) write drivers for Realtek, you're not going to see much support.

talo1019

Recommend some type of protection for ESD. Either through ethernet or RF side.

btw colebert, what makes SR-71 the champ? Can you be a little more specific? I'm curious.

talo1019

UBNT XR5, Alpha AWPCI085A, Dbii F50-PRO, Engenius EMP-8603, Unex CM10-HP are all cards you can try to see if it fits your needs.

talo1019

Please write me an e-mail and I will send you some samples.

talo1019

Good to hear.

Was having a discussion with my boss as to what you actually meant. He thought you meant that something was going on when you grounded it.

Thanks for clearing that up.

talo1019

Dbii boards are very sensitive to earthing issues. This is the F20 2.4GHz unit. Here you can see the Dbii board is earthed to the RB411, which is in turn earthed to the radio antenna. The radio antenna is then earthed to a copper water pipe via an earth strap. IMG_1316 (Medium).JPG IMG_1317 (Medium...

talo1019

Try step by step to isolate the problem:
Upgrade your Router OS to 3.3.
Try G band only, if that doesn't improve then,
Then try A 5GHz band only, if that doesn't improve then,
Try a different radio card, if that doesn't improve then,
Lastly try a different routerboard version

talo1019

The blowing up can be reduced by using the right steps such as plugging in the antenna and powering on. We originally had a problem with this beginning of last year 09 and have and fixed it. But if the engineers that designed the cards for Mikrotik don't solve it, then it just keeps happening and th...

talo1019

Hi Dallas, Yes we are looking into it. But there are many players already and the problem w/ "already built" is that they lock you into the device and you can't really customize and/or replace parts. These are probably small issues anyway and it just boils down to juggling price & qual...

talo1019

Hi Dallas, As I mentioned to you earlier via e-mail, I thought I would share this too. Besides the power of the higher powered cards, they are also very sensitive. While some cards are able to withstand a higher voltage without damaging the cards, it's easier to damage the 3GHz cards. This is why I ...

talo1019

Do you know of any other brands that does the 3GHz? I only know of XR3 and our F36. I would like to do a comparison with other brands since we're only comparing w/ the XR3 and I don't find it a fair comparison unless there is at least another one.

talo1019

eddieada may I asked what type of performance you are seeing? CCQ, ping times...etc (as reference) The external power connection does have some uses I admit. Is there a reason why you chose this card versus others? Was it the price/performance, or would performance/price be not as important? The onl...

talo1019

The only downside of running an 802.11n card is that it will require ROS 4.x to be recognized. Since I use nstream on all of my backhauls, I am not sure that I would be happy running an OS that still appears to have nstream problems. If you downgrade to ROS 3.30, your R52n will not be recognized. S...

talo1019

Yeah, we bought 2 of the MPCI-FLEX from http://www.adexelec.com as well, and then realized that they overcharged us when it's almost half the price here in Taiwan :P. I admit, it's not the easiest thing to find, probably why adexelec charges so much. In any case, the MPCI-FLEX type extender is conve...

talo1019

What are your ping times & CCQ like?

talo1019

Yes, I stand corrected. I probably shouldn't have described it in that fashion. Obviously, 400mW at 26dBm to 800dBm 27dBm is double based on mW. Yes, it's logarithmic in terms of actual power. I was thinking and describing in a more linear fashion for easier understanding, but...I shouldn't and I'll...

talo1019

I think everyone makes some valid points especially nest & valnet. Also someone is using a R52 and 1000mW kingston, very interesting. The point is with 2 Hi-Power card such as XR5, Kingston, F50-PRO stacked on top of each other, you will get inteference. The best analogy I could think of is putt...

talo1019

Try a different frequency.

Might be more useful if you tell us what antenna, board, miniPCI, CPE, how many cards in the board you are using. All this information is more useful in trying to figure out what exactly the problem lies.

Yes, decreasing Tx should help.

talo1019

Yes, Normis you are right about encryption on the hardware level. But I think what magnavox was referring to in terms of performance impact is when you click on a link, there are very small delays (referring more to the total transmission time of what you visually see versus the actual data being tr...

talo1019

Based on what you mentioned, I would probably use the R52H instead of R52N b/c of the inherent issues with N. There are definitely advantages for sure. But as you can see on the forums, there are still many issues with N and it's just not yet ready for a backhaul in my opinion (backhauls should be v...

talo1019

There are some card models that are more robust than others based on our tests (I have to mention that we only have maximum 2 of each card of other vendors so it's not completely accurate sampling error rate). Some components used are just more sensitive to changes. Some of it is design, some of it ...

talo1019

If you try to reset the RB, and use default settings and still experience the same issues, then try another RB to see if you experience the same issue. If so, I would suggest you to try other cards and see if there are changes. Trying 2-3 different cards might help in determining what card works for...

talo1019

They work great with Mikrotik. However with the Gateworks 2347 and Ikarus using 18V POE they reboot 5 and 6 times a day. Of course Ikarus support is non existent. Needless to say we don't use them anymore. I still have about 100 of them in the network. As they fail or get struck by lightning we rep...

talo1019

I think this article does an ok job at simply summing up how encryption impacts performance (5-30% if you don't want to click): http://www.speedguide.net/faq_in_q.php?category=91&qid=156 Note there is a comment by Philip that says: "Encrypting data adds some processor load as well. However,...

talo1019

This question is very broad and many factors can cause latency such as quality of equipment from the client to the AP (cheap antenna, cheap CPE...etc), AP to the internet (cheap miniPCI....etc). Obviously there might be other equipment in-between the AP to the internet. I think in your case you are ...

talo1019

Thanks for your support, but performance is the ultimate concern. As you experience issues we will address them. Sometimes I don't have all the answers but I will find out for you immediately. As I mentioned about performance, you might notice that our spec sheet might indicate a certain number but ...

talo1019

It can be used anywhere

talo1019

One more thing I wanted to mention from another longtime user of Mikrotik.
Mikrotik boards come shipped with watchdog timer enable set at 5min intervals, disabling watchdog should help as well regarding the reboots

talo1019

Like aaa mentioned as well as lowering the data rate might help as well.

talo1019

Thanks for the comment. I'm glad you liked it...we try hard to make sure the quality is good.

If you need anything just give me a holler.

talo1019

If you set the settings to default , this is the maximum the card can support for the F50/F50-PRO: 6-24Mbps = 19dBm 36Mbps = 17dBm 48Mbps = 14dBm 54Mbps = 13dBm Because of offset, your actual output is: 6-24Mbps = 19dBm + 8 = 27dBm 36Mbps = 17dBm + 8 = 25dBm 48Mbps = 14dBm + 8 = 22dBm 54Mbps = 13dBm...

talo1019

You shouldn't experience any issues. The only issue would that a small portion of the F20's and F50's shipped between May 2009 and Aug 2009 are exhibiting transmitter signal degradation at low temperatures (below -10C). This problem will degrade the link quality and cause uncertain latency and throu...

talo1019

My name is Lawrence from Dbii Networks and there always many questions regarding "Real power" for certain cards such as XR5, 8603, F50-PRO. I recommend this website if you have any questions on understanding what is happening: http://www.wifi-stock.com/file/ubi_mtik_power.pdf If you really...

talo1019

Hi Popcorrin & everyone else, My name is Lawrence from Dbii Networks. I just recently started posting to the forums (I know I should've come on sooner). In any case, I understand about packet loss and latency concerns you might have regarding adding the SafeSurge. I can tell you the reason why w...

talo1019

If you have any issues with the cards, you just have to ask the distributors who sold it to you for a free immediate replacement (of course, you can't physically break the card or burn it..etc...you get the idea) If they don't have it, I will send one to you. This is a benefit to you that I don't kn...

talo1019

My apologies for not writing sooner. I just took the initiative to get on here even though I'm usually in contact w/ the distributors more. But this might actually be even more beneficial

talo1019

My name is Lawrence from Dbii Networks. I read that some of you had issues regarding reboot. I would like to add one other thing which is that the Mikrotok router OS doesn't implement the correction offset so when you set it to default settings, 19dbm, you're actually transmitting at 27dbm. If you c...

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