Hi mate.
321/001 is the alarm number for that premises allocated by BOMS [the CAD system currently used in Adelaide Fire]. The FireMon system has ASE numbers for alarms which begin at 1 and go up from there, when an ASE activates, Adelaide Fire get a notification which shows that premises alarm number for the BOMS alarm system so that a response can be generated.
In your example, 321 represents the 'virtual concentrator' the alarm is on, but it is basically the station number of the primary brigade.
001 is the number of the alarm on that concentrator. If there were multiple fire alarm connections in that brigades area you would see 321/002, 321/003 etc.
With the introduction of SACAD, you will only see/receive one response page, and all will be less confusing
Hope that helps.
Alex
Pip, your reply posted while i was typing this. That alarm number is purely for the premises connection. It does not refer to the particular detector or zone.