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[Wal_]

They are positioned sort of like \|/.

by \|/ you mean:

[thetoad30]

Correct.

[Lycan]

That picture is NOT correct. Placing the antenna at those degrees causes the signals to smash in to one another, you'd want more of a tilt on the exterior antennas. You'll extend broadcast range and improve reception.

[thetoad30]

How far do the antennas need to be positioned away from vertical? What is the proper orientation?

The instructions in the documentation show this orientation as well as the recommended way to put the antennas.

[arod]

Try between a 45-50 degree angle.

[thetoad30]

Interesting development.

All 5 GHz N devices on the same floor as the router are now receiving between 35-50% of signal strength.

All 5 GHz N devices on the floor below the router are in the 50-60% range.

Prior, the same floor devices were around 50-55%.

This is after adjusting the antennas as stated to a 45-50 degree angle.

All 2.4 GHz devices on the same floor are less than 80% save one just opposite the router through a wall.

All 2.4 GHz devices one floor under are 95% or higher.

Why would the devices underneath the router with the antennas in a higher position be getting a better signal through walls and floors than a device in LOS about 40 feet away on the same plane?

[Wal_]

Why would the devices underneath the router with the antennas in a higher position be getting a better signal through walls and floors than a device in LOS about 40 feet away on the same plane?

Hard to say, we don't know what in your environment. mirrors, types of building materials, other APs, cordless phones...etc.

[thetoad30]

But shouldn't any interfering devices affect all signal strength, and not just those on the same plane 40 feet away with a clear LOS?

[arod]

I'm assuming the devices on the same floor are different from the ones on the floor below. What happens if you bring a device from the bottom floor to the same floor as the router, will you get the same results?

[thepam]

In my neighborhood, there are 23 other visible wireless networks, so I configured my new DIR-855 for channel autoscan.  When exactly will the DIR-855 change channels, and what will happen to wireless connections when the channel changes?  Could the symptoms be related to channel switching?

[Lycan]

Do the logs reflect anything of that nature?

[thetoad30]

The logs are not showing any channel switching that I can see.

I get wireless restarts and "deauthentications" and "authentications" on my laptops mainly. But then again those are the ones using the most wireless.

I have two devices that are exactly the same upstairs and downstairs. One gets 55-70% (downstairs) and the one upstairs gets 30-50%. These are on the 5 GHz N channel.

Another thing I noticed. A laptop on 5 GHz N was directly opposite the router (through a regular, wood-framed house wall) and only got a max of 70% signal. It varied from 55-70 as the highest. However, on 2.4 GHz G channel, a Tivo Wireless adapter in the same room directly across the router was receiving 100%. There are multiple 2.4 GHz wireless networks in the area as my notebook shows at least 10 in it's "search" that it does.

Hopefully this information can help figure something out.

Thanks for the replies.

[thetoad30]

UPDATE:

LOS about 25 feet away on 5GHz N my laptop is at 18%. Same spot on 2.4 GHz N I am at 56%.

The authentications I was speaking of were really associations. I used the wrong word. None of my 5GHz devices are being deauthenticated. They just keep showing secured and linked and then associated.

Finally, the other 5GHz N device on the network (one laptop is off) is at 30%. This device is about 5 feet away from my laptop currently. These two devices are on the same floor as the router with LOS (I can see the router in the other room).

The device downstairs is at 72%. This is through a floor and a wall.

Any ideas? This makes no sense at all how LOS is LESS than through walls and a floor.

[thetoad30]

Any ideas on this topic? I'm still at a loss.

Would installing high-gain antennas fix this problem if they are of a dual-band nature? Could the antennas that are installed be causing the problems? Or could the duality of the transmissions be causing interference with harmonics? I'm no electrical/RF engineer, but I do remember some of these things from engineering classes I took.

Thank you

[live4ever]

Hi All,

Same issue here, i keep getting wireless restart on 2.4Ghz, I even updated to the 1.12EU firmware and still no joy!

maybe someone can provide us with an useful answer or i will send the router back and refrain myself from buying D-Link equipment next time!

Best regards,
Cezar