[124827] in North American Network Operators' Group
Re: Wireless bridge
daemon@ATHENA.MIT.EDU (Mike)
Mon Apr 5 16:02:10 2010
Date: Mon, 05 Apr 2010 13:01:33 -0700
From: Mike <mike-nanog@tiedyenetworks.com>
To: Bret Clark <bclark@spectraaccess.com>
In-Reply-To: <4BBA2596.9070505@spectraaccess.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
No, you are not pushing a stable '54mbps over the link without issue'.
More likely, if you cared to look, you are getting somewhere around
30-35mbps, HALF DUPLEX. The '54mbps' advertised on the shiny sales
brochure, is a signaling rate and not a measure of thruput.
Mike-
Bret Clark wrote:
> Peter Boone wrote:
>
>
> I purchased 2x Ubiquity Bullet2's (2.4 GHz) and utilized our existing
> antennas. It has been working extremely well, pushing a stable 54 Mbps over
> the link without issue. Signal strength is consistently -40 dBm +/- 2 dBm,
> from about -80 dBm before! Total cost included 2x Bullets, 2x PoE adaptors,
> and approx 40 ft of STP cat5: $120. I have yet to see what happens in a big
> thunderstorm, but I extrapolate that they will be able to handle the EMP
> without going haywire like before. They have worked very well through
> conditions that our last setup would not.
>
> Thanks again for the input everyone!
>
> Peter
>
> More an FYI as I'm not overly familiar with Ubiquity's, but I believe
> -40dBm is kind of a hot signal which means they are screaming at each
> other, are you seeing any physical errors, specifically CRC's?. Won't
> necessarily affect overall throughput, but -60dBm is the sweet
> spot...too much of a signal is just as bad as not enough...sort of like
> that Sienfield episode of the the close talker :).
> Bret
>
