Actually I don't know about the Middle TN Pub Safety system or the ACU-1000, but I think you are throwing the terms around with different meaning.
Milf you asked if LTR supports patching, in the context Wayne (and I) supposed you ment patching TG's together, as in multi-select. That is not the same thing as connecting systems together. Connecting systems together is not a function of the TRS, it is a function of periphial hardware, firmware, or software. Connecting differnet systems together may be called lots of things, including patching, but in the context of your question, I am going go believe Wayne provided the correct answer.