Gentex Sync Module Question

Fire Alarm Help
1

I’m thinking of a theoretical system with Gentex LF sounders in bedrooms and commander 3s and 4s everywhere else. To sync the LF sounders I’d use a GTSM, and for the commanders I’d use an AVSM. The only problem is that the GTSM only does T4 iirc. If I sent the sync code from the AVSM to the GTSM would the LF sounders do T3 or would it just fry the module

2

Why would you use two different models of sync modules when you could just use one or the other?

3

So the LF sounder strobes could do T3 or T4

4

Then why not just use the one that can do both instead of both it & the one that can’t? (especially since I’m assuming that if you set the Commanders to continuous they’d be able to do temporal 4 as well)