4 x 2 is made up of a 4 digit alarm account code followed by a two digit alarm code. aaaaTP where aaaa is in the hexadecimal range of 0000 to FFFF and T is in the hexadecimal range of 0 to F, and P is in the hexadecimal range of 0 to F.
While dealers may use any combination of Type “T” and Point “P” to indicate an alarm condition certain conventions are best observed. When the “T” is represented by a hexadecimal digit (B -F) most receivers and automation systems follow the following convention.
|
“T”ype code
|
Condition
|
“P”oint
|
Definition
|
|---|---|---|---|
|
0
|
Test
|
X
|
Periodic Test
|
|
1
|
Fire
|
X
|
Fire Alarm
zone/point X |
|
2
|
Panic
|
X
|
Panic Alarm zone/point X
|
|
3
|
Burglary
|
X
|
Burglary Alarm zone/point X
|
|
4
|
General Alarm
|
X
|
General use Alarm zone/point X
|
|
5
|
General Alarm
|
X
|
General use Alarm zone/point X
|
|
6
|
General
Alarm |
X
|
General use Alarm zone/point X
|
|
7
|
Medical
|
X
|
Medical alarm zone/point X
|
|
9
|
Restore
|
X
|
Restore zone/point X
|
|
B
|
Open
|
X
|
Opening user X
|
|
C
|
Close
|
X
|
Closing user X
|
|
D
|
Cancel
|
X
|
Cancel user X
|
|
E
|
Restoral
|
X
|
Restore Zone X
|
|
F
|
Trouble
|
X
|
Trouble Zone X
|
X= a hexadecimal digit in the range of 0 to F