This enumeration determines specific audible alarms.
| IG_TW_AL_ALARM | Catchall for alarms not explicitly listed. It is also used where a device only provides control over a single, multi-use alarm. |
| IG_TW_AL_BARCODE | Barcode alarm. |
| IG_TW_AL_DOUBLEFEED | Cover paper handling errors. |
| IG_TW_AL_FEEDERERROR | Covers paper handling errors such as jams, double-feeds, skewing and the like; conditions that most likely stop scanning. |
| IG_TW_AL_FEEDERWARNING | Covers non-fatal events, such as feeder empty. |
| IG_TW_AL_JAM | Cover paper handling errors. |
| IG_TW_AL_PATCHCODE | Patchcode alarm. |
| IG_TW_AL_POWER | Generates alarms for any changes in power to the device. |
| IG_TW_AL_SKEW | Cover paper handling errors. |