For the non-pioneers that would prefer to just remove the T option from the dial (Ttr) and trunk (Tt) options and fix the problem, here's the code to do it from the Linux command line. Won't hurt anything to apply the patch whether you need it or not. Also won't hurt anything to apply the patch more than once.
Code:
mysql -uroot -ppassw0rd asterisk -e "update freepbx_settings set value = 'tr' where keyword = 'DIAL_OPTIONS' limit 1"
mysql -uroot -ppassw0rd asterisk -e "update freepbx_settings set value = '' where keyword = 'TRUNK_OPTIONS' limit 1"
amportal a r
We will push this out as a security update to all Incredible PBX servers.