This object holds the vendor-specific numeric identifier of an SNI (Siemens Nixdorf) trap definition, used to distinguish this particular trap type from all others the device can generate. An administrator or monitoring system uses this number to look up the exact meaning of a received trap in the vendor's trap reference documentation. For example, sniTrapNumber returning 42 for a table row lets the admin cross-reference vendor documentation to learn what specific condition trap 42 represents.