hello ,
Could you please kindly clarify your purpose ? to monitor the eth port up or down event ?
how many ont you have , you want to monitor it from the OLT (from OLT can allow the ont eth port event or alarm, but it is not recommend,too many logs will cause the OLT database overflow)or only from the ONT to monitor it (ONT logs is hard to get the logs )?
and Could you please clarify what is S138 , how it works with the HG8245Q2 ;
if description clearly maybe more engineer in the forum can help you , Thanks for understanding !