This enumeration determines specific audible alarms.

Values:

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.