remcs i dont think dispatches fire depts. remcs stands for Regional Emergency Medical Communication System. hence why i dont think they dispatch fire depts. check the database for the info, also if you told us what depts your looking for dispatch freqs for that would help
Both Irvington & Maplewood are dispatched through REMCS over their existing frequencies (the FD's, not REMCS freqs). I don't believe there is a separate tone-out for them, as they are paid departments and notified over the air.