[asterisk-users] Question on one-way-audio with IAX

[Matt]

Hi,
I have asterisk 1.2.12 running on my server.   Everything seems to be
working fine on it.  It has an IAX connection to the
terminator/orignator.   Again, everything seems to be fine.. calls
come in and go out.  However, it seems that after a call has been up
for several minutes audio will go one-way.   That is, we can hear the
other person, but they can not hear us.

Any thoughts?