asterisk users - Jun 2006 - Cisco router and "488 Not acceptable here"messages

> On Jun 11, 2006, at 8:15 AM, James Harper wrote:
> 
> > Additionally, just to satisfy myself that I wasn't going mad I
changed
> > the port from 5060 to 5070 and now things are working, so something
is
> > definitely playing up on port 5060.
> >
> If you are behind a NAT perhaps two SIP devices are both trying to use
> 5060?
> 
Packets are getting out, but one critical packet has had the body of the
INVITE removed, so Asterisk at the other end thinks that no audio codecs
have been proposed.

James