So now that I seem to have figured out (with the help of some good Samaritans) why my firewall wasn't behaving like all the documentation and online help said it should, I can move on to the next part of my learning journey: Queues.
I am assuming (and hopefully correctly) that Queues are MT's version of flow control / policy.
With some more community help, I hope to accomplish the same outcome in two separate ways: rate limiting
I already figured out how to rate limit the download speed (can't control the uplink speed on this particular device).
The last method I need to learn is how to set this on a per-policy or per-session basis. Our VoIP phones all connect to the same IP. Is it possible to give any session that connects to the desired IP a specific amount of bandwidth, while limiting the over all bandwidth of everything else; or is interface-rate limiting my best hope of accomplishing this type of QoS?