The list of possible operation types.
'all' - All operations types.
'smdPp' - ANSI-41 Short message service delivery point
to point.
'smsMo' - GSM-MAP Short message service mobile
originated request.
'smsMt' - GSM-MAP Short message service mobile
terminated request.
'smsSri' - GSM-MAP send routing info for short message.
'smsReg' - ANSI-41 Short message service request.
'smsNot' - ANSI-41 Short message service notification
request
'ucpSubmit' - Match UCP Submit Short Message requests