Ont Pon Rx Power

Hi Guys, I have two type of ONT ,Nokia and Huawei.
I want to display Rx Power of both ONT on Index page.
But both ONT have different method to get Rx power
Nokia ONT: InternetGatewayDevice.X_ALU_OntOpticalParam.RXPower
Huawei ONT : InternetGatewayDevice.WANDevice.1.X_GponInterafceConfig.RXPower

What can I do display Rx Power in "Pon Rx Power " in index page . I have added new column named : "Pon Rx Power



Thanks Dan Morphis
For Quick Reply.