Jack,
When I tested with Linksys WAP54G units, they got 26Mbps in the same room
and 23Mbps bridging across the street 125' away using a 6dbi D-Link internal
antenna on one end and the built-in antennas on the remote end.
I understand that marketed speed and real speed will be different. The same
goes for 100Mbps hard-wired speed marketing vs. real world speed. When using
the Netgear 108-advertised equipment noted in my last post, I got around
75-80 between my wireless laptop and a desktop with an Intel NIC hard-wired,
while a hard-wired Realtek card in another system only got only 38. I popped
a 3Com NIC into that system and got 85.
What I am trying to find out is if bridging can **only** be half the speed
of normal wireless NIC-to-AP speed. Or is it possible to get higher than
half the rated speed?
I wish 802.11n were available in APs that will bridge. The ones I have seen
so far can only be used as an AP, not a bridge.
Thank you for the link. I'll go take a look at it now.
Gregg Hill
"Jack (MVP-Networking)." <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Hi
>
> The speed that network devices are market under is the speed of the
> electronic circuitry on the device, not the Network's transfer speed.
>
> This page has some functional info. http://www.ezlan.net/net_speed.html
>
> Yagi or not at 90’ you get less then what you get at 20’
>
> Jack (MVP-Networking).
>
>
> "Gregg Hill" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
>> Hello!,
>>
>> I need to replace a client's wireless bridge to cover a gap that is
>> roughly 90 feet between buildings (I am a lousy estimator of distance. I
>> thought it was 300', but I paced it off the other day and it's only about
>> 90'). I took a close look at their antennas from across the street, and
>> the main building's Yagi appears to be pointing about six feet over the
>> top of the receiving Yagi. I think the person who initially installed it
>> used the wrong antennas for this distance. Since a Yagi has a very narrow
>> beam, I would expect them to have to be pointing down each other's
>> throats to work well.
>>
>> This theory also fits what is seen at the site. The remote antenna points
>> directly at the main one, while the main one shoots over the remote's
>> head. The data transfer from remote to main is 20Mbps and the transfer
>> from main to remote is 3Mbps. The current bridge is done using Netgear
>> WG102 units (two years old) with PoE. The client does not have the
>> password to get into them to see the settings, and I cannot down the link
>> to reset the units to default for access unless I go there on a Sunday.
>> Therefore, I want to replace the equipment with something faster.
>>
>> Out of curiosity, and before I go with very expensive Proxim (thank you
>> for the link, Jack!) or Ceragon equipment, I asked Netgear which unit
>> would be best and they recommended the WAG302, partly because you can use
>> 802.11a to eliminate a lot of interference. Since they tout this unit as
>> 108Mbps-capable, I asked about the maximum theoretical bridge speed,
>> which they said would be 54Mbps. I wonder if that is correct. I tried
>> D-Link's DWL-2100AP set to use 108 and it only bridged at 23Mbps,
>> according to QCheck. I tried two Linksys WAP54G units and they bridged at
>> 25Mbps, even in the same room.
>>
>> I have tested Netgear's 108-rated stuff used in normal fashion with a
>> WGT624 wireless router and a WG511T laptop card, and I get about 76Mbps
>> speed, better than hard-wired cheap NICs with Realtek chipsets.
>>
>> Do you know what the theoretical maximum bridge speed would be for 54G
>> and 108G equipment?
>>
>> Gregg Hill
>>
>>
>
>
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