Whats FCC dBi max for point to multipoint?

hotelwifi · 05-08-2005

36 dBi is the max for normal AP usage.

But does anyone know the maximum dBi radiated power for point to multi point?

That is, I might have an AP on the roof of my home and want to send a signal to several neighbors, to their directional CPE devices, also on their roof.

Am I allowed to go higher then 36 dBi radiated power with the directional antennas?

Maybe the omni can only do 36 dBi, but the CPE devices, since they are directional, can go higher in dBi output?

Thanks

Dutch · 05-08-2005

Quote:

Originally Posted by hotelwifi

36 dBi is the max for normal AP usage.

But does anyone know the maximum dBi radiated power for point to multi point?

That is, I might have an AP on the roof of my home and want to send a signal to several neighbors, to their directional CPE devices, also on their roof.

Am I allowed to go higher then 36 dBi radiated power with the directional antennas?

Maybe the omni can only do 36 dBi, but the CPE devices, since they are directional, can go higher in dBi output?

Thanks

"Normal" AP mode = point to multipoint mode.
Doing a point-to-point setup allows you a 3-for-1 advantage compared to a point to multipoint mode, but is not possible in your setup, unless you want to dedicate one radio+ antenna for each of your neighbours.

See this post for the allowed EIRP in the various regulatory domains.

As I can see you are using verizon.net DSL as your ISP, you should also be aware that according to verizon.net's TOS section 3.6 item b, you might be in breach of the contract and can loose your broadband connection, if you share your internet connection with your neighbours.

Dutch

Starpoint · 05-08-2005

Quote:

Originally Posted by hotelwifi

36 dBi is the max for normal AP usage.

But does anyone know the maximum dBi radiated power for point to multi point?

That is, I might have an AP on the roof of my home and want to send a signal to several neighbors, to their directional CPE devices, also on their roof.

Am I allowed to go higher then 36 dBi radiated power with the directional antennas?

Maybe the omni can only do 36 dBi, but the CPE devices, since they are directional, can go higher in dBi output?

Thanks

Something to think about, 36 dBi on an omni means a nice big circle.

a 36 dBi directional means you "aim" all that power in 1 direction. like a spotlite. 1 million candle power lightbulb in a flood covers a nice big area but does not illuminate far off.. same 1 mill focused in a nice beam.. well you get the idea.

Thorn · 05-08-2005

You can look up the exact math for the limit on the FCC site, but it essentially works out to an absolute maximum of 48dBi for a PtP.

hotelwifi · 05-11-2005

Thank you all for your replys.

I thought I'd mention that I wouldn't be using Verizon if I decide to share with my neighbors. I would use one of the CLECs in my area that allows the sharing. They are even a little less expensive then Verizon.

I thought since the one antenna is directional (in the PTMP), that maybe that directional antenna can get the higher gain antenna, using that power reduction rule...cause it is a directional antenna.

I realize that 36 dBi is the max for the AP though.

Thanks much for all your input

05-08-2005	#1 (permalink)
hotelwifi Registered Member Join Date: Sep 2004 Location: NE Posts: 37	Whats FCC dBi max for point to multipoint? 36 dBi is the max for normal AP usage. But does anyone know the maximum dBi radiated power for point to multi point? That is, I might have an AP on the roof of my home and want to send a signal to several neighbors, to their directional CPE devices, also on their roof. Am I allowed to go higher then 36 dBi radiated power with the directional antennas? Maybe the omni can only do 36 dBi, but the CPE devices, since they are directional, can go higher in dBi output? Thanks

05-08-2005	#4 (permalink)
Thorn Did you do the math? Join Date: Apr 2002 Location: Villa Straylight Posts: 10,361	You can look up the exact math for the limit on the FCC site, but it essentially works out to an absolute maximum of 48dBi for a PtP. __________________ Thorn "Read Altas Shrugged. Compare it to today. Repeat as necessary" Last edited by Thorn : 05-08-2005 at 04:09 PM.

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05-11-2005	#5 (permalink)
hotelwifi Registered Member Join Date: Sep 2004 Location: NE Posts: 37	Thank you all for your replys. I thought I'd mention that I wouldn't be using Verizon if I decide to share with my neighbors. I would use one of the CLECs in my area that allows the sharing. They are even a little less expensive then Verizon. I thought since the one antenna is directional (in the PTMP), that maybe that directional antenna can get the higher gain antenna, using that power reduction rule...cause it is a directional antenna. I realize that 36 dBi is the max for the AP though. Thanks much for all your input