Thanks for the previous replies to my questions but my internet connection is still not stable. I have lot of problem and it is not working most of the time.

I read on internet that there should not be lots of HEC errors but in my modem stats, they are so many, my modem is up from last 26 hours and it is showing 444,234 HEC errors.

SNR is 6.6
Attenuation 36
Output power 19.6

My connection is from BSNL, and they are not doing anything apart of giving me promises to fix the line.

Please advice, what is required to fix here so that this line starts working good.