[CUWiN-Dev] VoIP Test In Ghana

[Sascha Meinrath]

This is fantastic!  Love the experimentation.  I'd be very interested in seeing 
what happens over multiple hops, but knowing that VoIP will run (and apparently 
run a clearer call than cell phone) is great news.  Keep up the great work!

--Sascha

John Atkinson wrote:
> Ran some VoIP stuff last night using headphone/mic setups and a
> shareware app branded SJPhone.  We did it on a ~6km link that has
> about 500kbit/s throughput.  The only mods to the CuWinWare were
> acknowledgement and clear-to-send timeouts:
> 
> # sysctl -w hw.ath0.acktimeout=100
> hw.ath0.acktimeout: 48 -> 100
> #sysctl -w hw.ath0.ctstimeout=100
> hw.ath0.acktimeout: 48 -> 100
> 
> I put those commands in rc.conf so my CD booting nodes boot with them
> by default (or almost default).
> 
> We also changed from SIP to H323 on the SJphone app.  I didn't get a
> chance to go back to SIP, but I will.
> 
> The voice was perfect, better than a cellphone, err, at least a
> Ghanaian cellphone conversation.  But it was nightime, so no
> equatorial heat to burn the wifi throughput, and there wasn't much
> traffic on the network to compete against.  Also, the connection was a
> one-hop, no repeater nodes involved.
> 
> We'll start rolling these out to anyone that wants to buy a headset
> and until any problems arise.  Not even close to enough satellite
> Internet bandwidth to start making calls outside of the mesh (which
> will bring in an automatic latency of at least 400ms), but you gotta
> start somewhere.
> 
> -John
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-- 
Sascha Meinrath
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