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You know you're not supposed to touch the phone line, right?
If India is like other countries, then you'll see an AC voltage (amplitude is around 48v but undefined) when the phone rings.
I don't think an IC is needed for ringing, just use a buzzer - could be mechanical - and the circuits in the link below.
I doubt a single-function "telephone ringer" ICs are made these days, they are probably obsolete, and you would need
a complete phone ic.
All the info you could need on ring detection is here: https://www.epanorama.net/circuits/telephone_ringer.html
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