[Freeswitch-users] Equivalent to Asterisk's "directrtpsetup=yes"?

[Fred-145]

On Fri, 29 Jan 2010 08:26:53 -0600, Brian West
<brian at freeswitch.org> wrote:
>> Are there drawbacks to having RTP pakets flow directly between the SIP
>> end-points?
>
>Well if nat is involved you might have issues.

Since Freeswitch has handled the initial connection and the NAT box
has opened the range of UDP ports for RTP/RTCP, in what case would the
two end-points have a problem with NAT? Is it possible for end-points
to send IP/port information in the midst of a conversation?