I haven't seen this in a long time, and a quick search confirms all the sources mentioned are about 4-6 years old and are gone now, although someone here might have it... seems to me it used to work well but somewhere along the line it quit working, perhaps an upgrade to wireshark.
I did notice in the Linux man page for wireshark there is a contributor listed with a Mitel email address, brian_bogora@mitel.com, perhaps emailing him could assist you, the man page was last updated in 2014 though?
I think many here, including myself, would be interested if you are able to come up with something.