[Asterisk-Users] G729a Pass-Through and Recording/Monitoring

[trixter aka Bret McDanel]

On Sat, 2006-02-04 at 22:44 -0500, Steve Totaro wrote:
> The original quesiton was that if you had a server performing G729
> passthrough, could you do recording without licensing.  Digium confirmed
> that the server doing the passthrough would also need a license in order
> to record the conversation.  Using the Erlag formula you can pretty much
> figure out how many licenses would be needed.  
>  

The real answer is maybe.  If you record raw g.729 you dont need a
license becuase you arent encoding or decoding.  However monitor may not
work this way, it may internally decode even if it doesnt have to, I
havent looked so I dont know.  

You would then only need a license to change the coding scheme (ie from
g.729 to anything else) or play the file (whatever plays it at the very
least would need a license).  

In this model you could record raw g.729 frames, and have 1 process,
thus 1 license to convert them to something else.  But the issue of
whether or not monitor would decode (or by using monitor cause something
else to decode) would need to  be resolved.

ranchnetworks.com has network appliances that work with asterisk.  These
have a calea feature, which basically does port replication on the
individual RTP streams that are flagged (ie not everything).  It works
in two modes, one it sends a copy of the RTP data to a specified IP/port
or it just replicates and you can use a packet sniffer.  Either mode
would enable you to cleanly record without a license, see above for
listening.

This also assumes that there is traffic going through their switch,
becuase well if it doesnt its a little hard for their switch to do
anything with it :)

-- 
Trixter http://www.0xdecafbad.com     Bret McDanel
UK +44 870 340 4605   Germany +49 801 777 555 3402
US +1 360 207 0479 or +1 516 687 5200
FreeWorldDialup: 635378
http://www.sacaug.org/ Sacramento Asterisk Users Group
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