| NC | [Blank] Not Connected |
| BT | Battery |
| BLC | Both Local and Central |
| BU | Burglar |
| CN | Central |
| CEK | Central Station with Keys |
| CEN | Central Station without Keys |
| CK | Cooking |
| DE | Detector |
| DR | Direct |
| FIRE | Fire |
| FC | Fire Connection |
| FU | Full |
| HU | Hold-Up |
| HM | Humidity |
| LO | Local |
| NO | None |
| OI | Operation ID |
| OT | Other |
| PT | Partial |
| PC | Police Connection |
| PREM | Premises |
| SA | Safe |
| SMOKE | Smoke |
| HVAC | Smoke Dampers |
| SP | Sprinkler |
| STANDPIPES | Standpipes |
| TM | Temperature |
| WR | Wired |
|