^^ That is the worst thing about BSNL. Try talking politely and somehow convince them to change the line. SNR and attenuation is Greek to them. Try saying there is a lot of noise phone or "earthing" as they say.
Ideally, complain to a higher authority like the SDO in the BSNL office. That usually gets the work done. Still if they don't agree, complain to the nodal officer. Having contacts in BSNL does help.
Ideally, complain to a higher authority like the SDO in the BSNL office. That usually gets the work done. Still if they don't agree, complain to the nodal officer. Having contacts in BSNL does help.