For having no disturbance in your internet connection, one should have more than 6DB, downstream and upstream SNR. But remember this value is not the standard one. There should be average of 20DB to avoid these repeated disconnections.Meaning of various values is as follows:
SNR Margin: A higher signal to noise ratio will result in less errors.
6bB. or below = Bad – experience intermittent synchronization problems.
7dB-10dB. = Fair
11dB-20dB. = Good
20dB-28dB. = Excellent
29dB. or above = Outstanding
Attenuation Rates: Attenuation is the loss of signal over distance. Unfortunately, dB loss is not just dependent on distance. It also depends on cable type and length of the cable, including location other connection points on the cable.
20bB. and below = Outstanding
20dB-30dB. = Excellent
30dB-40dB. = Very Good
40dB-50dB. = Good
50dB-60dB. = Poor and may experience connectivity issues
60dB. and above = Bad and will experience connectivity issues.
If your line parameter as shown in your Modem is GOOD or above then there is no any problem in Copper pair or line, the problem may be either in Splitter or in Modem itself.
But if the line parameter as shown in your Modem is BAD, then you have to check your line if you can clear some open joint else call to BSNL people or just lodge a complaint on “198”.
After configuration change you should reboot the modem. This will limit the download speed to around 4.8 Mbps (4984 Kbps) and the upload speed to 207 Kbps. But it will help in stabling the DSL LED in presence of extra impedance also.
I think this article may have solved your issue of frequent disconnection in BSNL broadband. If you have any query regarding this please share with us.