Downstream rate not stable

[invisible007]

Guys from yesterday iam seeing that my Downstream rates are not stable ,
earlier it was 8110 , and from yesterday its always changing 2650 or 5555 ... so i get less download speeds ...

why this is happening ?? Is this problem from my nearby BSNL exchange ...

 

[xstarm]

It happened to me 3 weeks back. The linesman came and fixed the line for me and the line rate was back to normal.