Please I need help BSNL GENEXIS PLATINUM 4410 internet connecting issue

i have the same issue here it kept freezing up every night at 2 and in between internet is not at all stable once restarts all the problems goes away and with in 24 hrs it comes back again
 
i did that i was tired of bsnl and went and got a router myself net link all my problems solved for now but that rx light reading is higher it used to be -18 db now its -21.9 db is this a concern ?
 

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