Batboard

Here is my question. I work for to different hospital systems that have about 6 units total and each unit have there own alert tone. None of the units share the same A tone. Right now I have a zone setup for each unit. How do I setup to receive an alert tone for each unit? I tried using QC system but that only allows for 4. Is there any other way to setup to receive 6? Or do I have to use QC II?