ANSI SCTE 38-1:2017 pdf free download – Hybrid Fiber/Coax Outside Plant Status Monitoring SCTE-HMS-PROPERTY-MIB Management Information Base (MIB) Definition
— The following table contains zero or more entries which are the
— alarms that are currently “active” for a NE.
— The motivation behind the table is to minimize the number of
— transactions between a management application and a NE to retrieve
— it’s current alarm state. Current alarm information is available in
— the propertyTable, however there is a probability in the nominal case
— that few alarms will be active at any given moment in time. Given that
— the propertyTable is of fixed length, iteration through an NE’s entire
— table is required to confirm this. Since this table only contains
— entries corresponding to those entries in the property which have
— active alarms, the table is usually empty.
— It is suggested that a management application use an iterative
— algorithm, employing GET-NEXT to retrieve information from this table.
— The algorithm starts with the object identifier, currentAlarmTable, without
— an index specification. The iteration continues until an object value is
— returned which is not a member of the table.
— This should usually occur immediately. If any alarms
— are active, then values are returned for only those properties which have
— alarms active.
(1) ‘currentAlarmOID.13.fnOpticalReceiverABSwitchState.1’ instance will have the value ‘fnOpticalReceiverABSwitchState.1’;
(2) ‘currentAlarmAlarmState.13.fnOpticalReceiverABSwitchState.1’ instance will have the value caasDiscreteMajor(6);
(3) ‘currentAlarmAlarmValue.13.fnOpticalReceiverABSwitchState.1’ instance will have the value pathB(2).
Notice the presence of 13 in the OIDs of the instances above.Number 13 is the length of the ‘fnOpticalReceiverABSwitchState.1’
OID, which is ‘1.3.6.1.4.1.5591.1.5.13.1.4.1’.
Example 3. Object heCommonTemperature (HMS111).
If object ‘commonInternalTemperature.1’ has a major alarm for a HIHI threshold value of 60 degrees Celsius defined in
the propertyTable, and this alarm occurs then:
(1) ‘currentAlarmOID.18.heCommonTemperature.1’ instance will have the value ‘heCommonTemperature.1’;
(2) ‘currentAlarmAlarmState.18.heCommonTemperature.1’ instance will have the value caasHIHI(2);
(3) ‘currentAlarmAlarmValue.18.heCommonTemperature.1’ instance will have the value 600.
“This MIB contains information that must be supported by all HMS network elements, including but not limited to, transponders, line monitors, amplifiers, fiber nodes, and power supplies. The Property MIB defines the ‘properties’ that may be associated with each parameter. This MIB is defined so that these ‘properties’ may be applied to any parameter, because the index to the MIB is the object identifier of the parameter. The purpose of a ‘property’ is to provide a mechanism to manage alarm thresholds. It is not the responsibility of the transponder to check for violation of the above recommendations. The element manager is responsible for checking alarm limit values. Entries in the property table are specifically for ‘analog’ parameters. The discrete property table is used to monitor other parameters.