[AusNOG] Bandwidth in Phillip Island

[Mike Everest]

Good morning Alex, all,
 
Actually, my comments about exceeding limits was in response to the mention of nanostation product in the original post :-}  I have
seen way too many examples of people installing gear that has fixed antenna and then turning up the tx power to max to get 'better
speeds' on the resulting links. The same goes for other vendor models, e.g. MikroTik, that it is easy to configure them to operate
beyond the regulatory limits.  
 
I'm sorry if my comments were interpreted as meaning that 5GHz links can't be used for longer distances - to the contrary: 5GHz is a
great way to achieve good speeds over distance so long as it is used with care! :-)
 
When transmitters with tx capability of 30dBm connected to 30dBi antennas, it is sometimes far too tempting to just 'turn it up a
bit' ;-) 
 
The article linked in that same post documented a 50Km link using 5.8GHz has EIRP at about 58 dB - that's, what, about 250x our
regulatory limit :-D
 
I think that a discussion about power output limits is always relevant when talking about microwave data links :)
 
Cheers!
 
Mike Everest.
Shop.duxtel.com.au
 
From: ausnog-bounces at lists.ausnog.net [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Alex Maclaren
Sent: Friday, 4 May 2012 9:46 AM
To: 'Craig Askings'; ausnog at lists.ausnog.net
Subject: Re: [AusNOG] Bandwidth in Phillip Island
 
I beg to differ of all this discussion about the EIRP limits in Australia meaning wireless link distances can only be 2-3km.
We have many links of over 15km operating at legal limits.
It is just a matter of having enough gain on your dishes.
For instance, if you have two BulletM5 radios and 27dbi grid dishes, over 10km operating in the 5.4GHz range, your theoretical
signal is -72dBm.
This would be more than enough signal to achieve full modulation on the link.
 
Regards,
 
Alex Maclaren
Network Operations Analyst
Cirrus Communications Pty Ltd 

t|: 
1300 552 698

f|: 
1300 556 790

e|: 
alex.maclaren at cirruscomms.com.au

w|: 
http://www.cirruscomms.com.au/
New Signiture
This is an e-mail from Cirrus Communications Pty Ltd. It is confidential to the named addressee and may contain copyright and/or
legally privileged information. No-one else may read, print, store, copy, forward or act in reliance on all or any of it or its
attachments. If you receive this email in error, please telephone us on +61 2 4336 2000 or email info at cirruscomms.com.au.
 
From: ausnog-bounces at lists.ausnog.net [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Craig Askings
Sent: Thursday, 3 May 2012 9:07 PM
To: ausnog at lists.ausnog.net
Subject: Re: [AusNOG] Bandwidth in Phillip Island
 
Don't expect more than a couple of kms at the class licence EIRP limits that have been set for Australia.

On 3/05/2012 9:03 PM, Martin Hepworth wrote: 
Uniquiti's AirFiber http://www.ubnt.com/airfiber could be an option.

-- 
Martin Hepworth
Oxford, UK
On 3 May 2012 09:31, Mike Everest <ausnog at duxtel.com> wrote:
> Ubiquiti Nanostation/Bullets can easily get upto 15Kms without issues. TCO
> is in the hundreds.
 
 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ausnog.net/pipermail/ausnog/attachments/20120504/0759c475/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.jpg
Type: image/jpeg
Size: 13292 bytes
Desc: not available
URL: <http://lists.ausnog.net/pipermail/ausnog/attachments/20120504/0759c475/attachment.jpg>