Hello Karan BhansaliI have the same issue, no it did not help
/etc/init.d/webcallserver
check_amazon
#check_amazon
I am facing same issue in RHEL 7.5
stun_freshness_timeout=1000000000 did not work.
It seems it is a bug in flashphoner that displays when run on a RHEL
I have running version 5.0.3406