Alarms and KPIs Guide Alarms and Events vSTP Alarms and Events (70000-70060, 70100-70999) 70407 - Conversion MSU Discard. SCCP MSU Too Large 70407 - Conversion MSU Discard. SCCP MSU Too Large Alarm Group: vSTP Description: This event is generated when the SCCP MSU total length after conversion is greater than supported message length. Severity: Info Instance: None Auto Clear Seconds: 10 OID: vSTPVstpInvMsgLengthNotify Recovery: It is recommended to contact My Oracle Support if further assistance is needed.