Nowadays, landlines are not so common in the country. With the mobile expansion and ease of use, people, especially home users, canceled their landline connections and moved forwarded from mobile-only usage.
It is also true that providers like BSNL were not dealing with the service as before. This also caused peoples to avoid landlines.
However, a few users and offices, and other organisations still use landlines for official purposes. Once there was a fault in the connection, we need to contact the service provider to fix it.
Here you can find the BSNL landline complaint handling number so that you can call them and register the fault.
BSNL Landline Complaint Register Number
Call 1500 from Landline number of BSNL mobile (Free)
Call 1800-345-1500 from any other mobile or landline (Toll-Free)