[arm-allstar] Data Conservation

[John]

Great information, Doug. Thank you. Once I have all the bugs out of this
node I'll start on another and primarily stay connected to that node. I was
mainly thinking about Echolink, but your codec suggestions will be useful
too. I have a couple friends who don't have access to Allstar yet. That
will change - even if I have to build nodes for them <grin>... right now
one is building an experimental aircraft so his efforts aren't ham radio
oriented. I think both have static IPs, so I may be able to get by with
minimal Echolink database updates - if at all. Worth an try. The Echolink
node list updates pretty often as configured. Thought there might be a way
to update upon request instead of periodically or enable/disable Echolink
connectivity as needed with a command.

John


On Wed, Aug 27, 2014 at 1:28 PM, Doug Crompton <doug at crompton.com> wrote:

> John,
>
>   As far as connections are concerned you could use ilbc as your codec but
> that depends on where you are connected to. The ilbc codec uses about 1/3
> the BW of G726 but it is only currently supported on the BBB or a PC system
> where it has been installed. You could also use gsm at reduced audio
> quality if the system you are connecting to allows it. Codec priority is
> setup in iax.conf
>
> If you are connected to a node or nodes that have light traffic that may
> not matter but if it is a busy channel a higher BW codec could eat up a lot
> of BW.
>
> The only things that are downloaded are the node list once every 5 minutes
> and the node details which download once a day in a cron job. If you always
> connected to the same place and their IP address was static or did not
> change you could dispense with the node list download and specifically add
> the node or nodes in you rpt.conf file.
>
> To stop the node list updates comment out the line in /etc/rc.local
>
> /usr/local/etc/rc.updatenodelist &
>
> and reboot.
>
> You could also update that script and change the update period but keep in
> mind that nodes are changing constantly and there would be more stale data
> that way.
>
> The nodes stanza in rpt.conf would then be used to connect to nodes you
> commonly connect to -
>
> [nodes]
> ; Note, if you are using automatic update for allstar link nodes,
> ; no allstar link nodes should be defined here. Only place a definition
> ; for your local nodes, and private (off of allstar link) nodes here.
>
> node = radio at IPaddress:port/node,NONE
>
> So if your friends node was 12345 and his ip was 50.60.70.80 the line
> would be -
>
> 12345 = radio at 50.60.70.80/12345,NONE
>
> If he was on port 4568 it would be -
>
> 12345 = radio at 50.60.70.80:4568/12345,NONE
>
> The ':port' is only used if the port is other than the default 4569
>
> I don't know about echolink being negligible. They have a fairly
> substantial list (larger than Allstar) and depending on how often it
> downloads it might  be more than you think. I would turn off echolink if
> you don't need it. If it is just you using it to your own system perhaps an
> iax client like zoiper might be a better choice. It would only use up BW
> when you are actually using it. No database involved.
>
> I am not sure how much these suggestions are going to buy you. It really
> depends on your usage but it is worht a try.
>
>
>
> *73 DougWA3DSPhttp://www.crompton.com/hamradio
> <http://www.crompton.com/hamradio>*
>
>
> > From: wb5nfc at gmail.com
> > Date: Wed, 27 Aug 2014 12:45:57 -0500
> > To: arm-allstar at hamvoip.org
> > Subject: [arm-allstar] Data Conservation
>
> >
> > I'm looking for ways to be as frugal as possible on data usage for my
> node. Ideally, I want to leave the node on all the time (at least during
> the day). I'm sure the data consumed for constant Echolink node updates is
> negligible, but every byte adds up when utilizing a hotspot with a data
> cap. Is there a way to refresh data less often or only when needed for an
> outgoing call?
> >
> > John
> >
> > Sent from my iPhone
> > _______________________________________________
> >
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> >
> > Visit the BBB web page -
> http://www.crompton.com/hamradio/BeagleBoneBlackAllstar/
> >
>
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>



-- 
John Kenney
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