SNMP，some question about the CISCO-ENTITY-SENSOR-MIB value???

[00uu8zw0rf3DPJspe5d6]

we are trying to monitor the Cisco 9148s SFP status, and have get the Sensor's dBm value from the CISCO-ENTITY-SENSOR-MIB table, meanwile , it has an Index value like "30000xxxx",such as "30001773",

entsensorValueTable

but we can't sure how to locate the port location from the Index value, what is the mean of the “30000xxxx”, how can i locate it's physical port location? or find the translate rules betwwen the “30000xxxx” and the entPhysicallindex？