[asterisk-users] Upgrade from version 1.6.24 to 1.8.12 - Retransmission timeout error

[Andres]

>
> Considering that you made progress on your initial problem by setting
> "nat=force_rport" (resulting in connected calls with no audio) and now
> you're mentioning the use of "externaddr", I'd recommend a very
> careful reading of the "NAT SUPPORT" section of sip.conf.sample in the
> configs directory of the Asterisk source tree.  In Asterisk 1.8, there
> is a new configuration option named "media_address" which may be of
> particular interest.
>    
It sounds like a NAT issue to me too.  Why don't you do a quick test and 
put the Asterisk box on a public IP if you can.  If it works, you will 
have narrowed down the issue to a NAT problem.   You could have a nat 
router with a broken SIP ALG.

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