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Re: Wireless links

ALL:

It depends on which Ricochet you have.  The autobahn units that support 100
Kbps will allow ATDT <Ricochet Serial Number> connections if you are on
the net (i.e. are communicating with a pole top router).

The old black bricks that did 28 to 38 Kbps would support modem to modem
ATDT connections if the units had Line of Sight.  Remember this Spread
Spectrum, Frequency Hopping RF we talking.  To do 2 miles, you would
probably have to hack the modem and connect a cable to the roof top
and use a couple of YAGI (directional) antennas aimed at each other
to make it work reliably if you could not see your friends house from your
roof top.  The brick units had a "metroweird to SMA" small microwave
connnector that would allow use of external antennas.

The FCC rules that govern part 15 SSFH transmission in the 902 to 928 MHz
band limit the output power of the radio to 30 dBm (1 Watt) into the antenna
and 36 dBm from the antenna (EIRP).  If you exceed these power levels the
RF cops could bust you.  A typical YAGI is 6 to 12 dBi gain and 20 feet of
cable with insertion loss could be another couple of dB.

I have used the Ricochet bricks over an 11 mile link with directional
antennas and line of sight.

Since, I do not know what your equipment is and what the terrain and clutter
between you and your friends house, I can not advise further.

cordially

cb
-----Original Message-----
From: Doug Sutherland <>
To: Nick Kartsioukas <>
Cc:  <>
Date: Thursday, March 01, 2001 8:38 PM
Subject: Re: Wireless links

>Nick,
>
>I keep hearing that ricochet modems can do peer-to-peer outside of the
>ricochet network area. But I tried this and did not succeed. We could
>connect directly between two ricochet modems by dialing the serial
>number of the modem WITHIN the ricochet coverage area, but this did
>NOT work outside of the coverage area. If anyone can prove otherwise
>I'd love to hear about it. But I'm starting to think that this is a
>rumour that is not based in truth. When powered on the ricochet modem
>hardware searches for a transceiver to connect to automatically. If
>it finds one, you're good to go, you can dial into the standard
>ricochet net connection, you can dial another ricochet modem on the
>network, and you can even dial into a modempool if you chose that
>option for an extra five bucks a months. However, if the modem does
>not find a transceiver when powered on, the red light stays on and
>as far as I can tell nothing works. If someone has actually done this
>peer-to-peer connection outside of the ricochet coverage area please
>pipe in and let us know how you did it. By the way, the proxim modems
>(rangelan2 and symphony) definitily ARE peer-to-peer, they seek out
>and find each other. This allows jacket to automatically talk to
>car and house by walking within short proximity (assuming proper IP
>address and subnet config). I plan to eventually create a network
>daemon that uses GPS and some intelligence to configure for this
>kind of connection automatically
>
>  -- Doug
>
>
>
>
>On Thu, 01 Mar 2001, Nick Kartsioukas wrote:
>> On Thu, Mar 01, 2001 at 10:28:49PM -0500, James Hall wrote:
>> > What else is there? Ricochet 128k 'modems' sound right to me.. but I
doubt
>> > their range is up to it (and if they could actually function
peer-peer..
>> > outside the Ricochet system)
>>
>> Ricochet modems can connect directly...I believe you issue an "ATDT x" to
>> the modem, where x is the serial number of the modem you wish to connect
>> to, backwards.  Could be wrong about that detail though.
>>
>> --
>> Nick Kartsioukas |  KF6UZB
>>  |  NK2694
>>
>> --
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>
>--
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>

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