holyoke mass - interesting FD radio setup

https://snewiki.com/forums/index.php?threads/ma-hampden-cnty-fire-holyoke-fire.17233/

2 DMR channels

seems that all dispatches go out on all 3 TGs simultaneously - the
poster says just the tones go out on all 3 TGs but apparently he means
the entire dispatch goes out on all 3 TGs - or maybe the tones go out
on all 3 TGs but the verbal message just goes out on TG1001 - actually
we just got lost - what is the primary channel? what is the 2ndary
channel? does the dispatch go out on TG1001 but the response happens
on TG 1002?

or - field units are primarily on TG 1002 - TG 1001 is only used to
alert units when they are in a station house - maybe? - field units
always are scanning both TG 1001 and TG 1002 ?

??????