@jchavanton -- thank you. I have dug more into my trouble -- partly my issue was the firewall not having port 5090 open between testing machines and the timeout of the `rms_bridge()` when it couldn't reach the destination `$var(target)`. I look forward to testing this module, particularly the B2BUA functionality and the ability to handle REFER in the future.
I can now confirm that I can get `rms_bridge()` to work in its most basic form.