SNMP TRAP on EvENT

Hi & Thanks for read it,

I would like to design SNMP event, traps in order to be managed by SNMP Network management platform, like HP OpenView, or other.

It's possible to generate a trap in pl/sql or via enterprise manager on procedure event?

Anyone have test log4plsql for send traps?
Anyone know if it's possible to send traps via OS COMMAND on ORACLE?

Thanks