I'm using the 1.23WW downloaded from here:
ftp://ftp.dlink.ru/pub/Router/DIR-855/Firmware/DIR855Ax_FW123WWB05Beta.BIN
since August 2010.
I'm using the 2.4Ghz and 5Ghz Frequencies.
For closer range, the 5Ghz gives higher throughput. However, when you move further away, or in my case through 1m thick walls, the 5Ghz loses signal quality more rapidly then the 2.4Ghz and thus for larger distances or penetrating thick walls I switch to the 2.4Ghz
Both are stable. on Both frequencies I copy data over the Wireless up to 18Mbyte / second.
My Experience with MAC OS X Snow Leopard however is the connection drops sometimes to below 10Mbyte/second. I have no idea why, just that the OSX on such occasions also hangs the mouse and keyboard.
With my other computers as well as MAC but using Win7 in Bootcamp, these drops don't occur. The connection is stable around 18Mbyte, but, you should know, somethings how wlan works.
You have a max of 300Mbit! Only half can be used in either up or download. Leaving you with 150Mbit max in either direction. Don't ask me why, I read this in Wikipedia and I can confirm that at least my throughput confirms wiki information. These 150Mbit is equal to 18Mbyte (rounding down) and I get this only in the room where my router is.
When I copy to-from a computer on my LAN, i manage this 18Mbyte/s
When I copy to another WLAN device, the connection drops to under 9Mbyte/s. Which leaves me the logical conclusion, the MAX throughput is devided among all clients.
Through a bit 1m wall of wood and stone (no metal or concrete) i still get around 12 to 13 Mbyte per second, on both 2.4 and 5 Ghz. Through a 2nd wall my connection on the 5Ghz drops massively under 1Mbyte while the 2.4 keeps up to 10.5Mbyte
When my neighbours start their stuff, on the 2.4Ghz I loose performance, on the 5Ghz not, thats why I use the 5Ghz by default.
When I have 2 computers, one using the 5Ghz and the other the 2.4Ghz, I can copy up to 18Mbyte between 2 WLAN computers..
These are my experiences and not technical stuff.. I hope it might help people ..
So my conclusions:
1) use both frequencies and device your computers using both frequencies
2) computers further from the router should use the 2.4 while closer ones the 5ghz
3) if you have a NAS, or in my case a complete Quad-Core Server running, connect it by wire, not WLAN!
4) This firmware is running stable since August 2010 and never rebootet or restarted the router ever since
I'm running VPN servers, Newzbin downloads, copying data between laptops and a 10terabyte HDD Quad Core server, I'm using XBMC to view movies over the WLAN stable without any flickering..
to keep it short:"if you haven't updated to this firmware, do now!"
I'm using a DLINK router bought in Germany, A2
Our network is influenced by other WLANS, I count 24 in total (yes, live in a big 14 Million citizen city)
so I have a lot of disturbance, but the 5Ghz is ALWAYS performing 100% with no disturbances..
I think you all bought a good Router with the DIR-855 and wish you all g'luck
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Topic: DIR855Ax_FW123WWB05Beta.BIN (Read 28043 times)