Hey Justin,
I did inspect the code and do not see anything wrong. In fact, I did fix a few other minor bugs. None of
which affected your issue. I release a new version 5.56 which is now publicly available and I
recommend you get.
One thing that comes to my mind is that SIP inspector by default uses port 6000 to send/receive
RTP packets. Including out-of-band digits.
Make sure that port 6000 is not used by another program on the PC or change value circled
on the screenshot below to a port that you know is for sure free/
I am also attaching a WS trace which shows and demonstrates that all works well on my PC.
See the attachment.
Regards,
Zarko