Wireless link with excelent signal strenght but slow data transfer rate

Sorry, I was afraid , I won't be precise when I wrote 1Mbs ( Mbs=Mbits ; MBs=MBytes). Yes, the answer is, I achived only speed between 0.5Mbit/s and 1.5Mbit/s, which is 5 to 10 times slower then I expected from 11Mb/s.

OK, what kind of ping responses are you getting?

Few days ago I changed one of 15dBi antennas with 24dBi one. According readings from Dlink DWL120 USB adapter, link qualitiy is between good and excelent, and signal strenght is always excelent (83%). Before I made this improvment, I checked ping response time and it seemed OK to me ( most of pings where <10ms). The WBRg54 was set up to use 11Mbs link, same as the Dlink adapter.
 I checked speed by coping large files between two computers using Explorer, and found it is too slow.

Bay the way, I running point of sale application on W95 PC with Buffalo's WBRG54, and back end database is on W2000 PC with Dlink DWL120. During this few days link was very stable ( no one fail was occured), but all apears too slow.

what AV are you runing? is it checking incoming and outgoing files?

There is not AV on any computer. It is closed system without viruses. I was running these computers in LAN previosly , without any noticable delay , and then headquter move to another building and I had to slove network problem by using wireless equipment.

what are your ping responses now?

what OS's are involved (you mentioned the backend being on w2000)

Side A:
W95; NIC10/100; Buffalo WBR G54

Side B:
W2000 pro; Dlink DWL120

I wil not be able to test ping before Monday, I will check it and let You know

another suggestion
http://www.tweakxp.com/TweakXP/display.asp?id=1557

Create a text file on the server put this into it:



Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters]

"SizReqBuf"=dword:0000ffff



Save the file as WHATEVER.REG not WHATEVER.TXT

Then double click on the file to apply the setting (once again on the SERVER not the pc).

What this does is it sets the DIR commad's buffer from 14000 to 65000. This fix works on NT/2000/XP.

Here steps I've done to improve situation:

First I've made similar configuration on my desk using two W2000 computers, and linked them with WBR G54 and DWL120, and I achived speed of 7Mbs.
Then I added second WBR G54, 300m away, as a repaeter between first WBR G54 and DWL120 ( total distance 2x300m) . Speed was lower in this situation and was ca. 4Mbs.  

Now about link we talk about.
ping responses varied between 4 and 7 ms.

I done folowing actions:
Side B: (link quality 83%, signal strenght 86%)
1. Speed tested ( spped value estimated 1.7Mbs)
2. Register entry added: (speed value estimated 1.9Mbs)

Side A:
3. WBR G54's firmware upgraded from 1.11 to 2.01 (spped same 1.9Mbs)
4. W2000 laptop connected instead W95 ( speed 3.8Mbs!!)
5. Network drivers reinstaled on W95 ( speed 3.4-3.8MBbs)
ping was the same ( between 4 and 7 ms)

If this is speed I can expect on distance of 600-700m I will accept your previosly answer. It improved my link speed about 10%.

Also from the link
When indoors, 802.11b signals can travel as far as 150 meters (492 feet). Outdoors, 11b range is over three times greater-- 500 meters (1640 feet, or nearly 1/3 of a mile). The outdoor ranges are higher because there are fewer obstacles, like walls, to absorb or block the radio signal. At either of these extreme ranges, the bandwidth available is a mere 1Mbps, which would yield throughput closer to that of your broadband connection. That low level of throughput could hamstring your networking activities.

On the other hand, for 802.11b to operate in its maximum bandwidth mode of 11Mbps, the distance indoors can be no more than 50 meters (164 feet); outdoors it should be 250 meters (820 feet).