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https://barcampbangalore.com/bcb/bcb-spring-2018/bcb2018-technology/lets-know-and-lets-do-using-setu-ata211g-ivr
I am attending Barcamp Bangalore Spring 2019 and session titled "Let’s know and Let’s do using SETU ATA211G – IVR", more info at https://barcampbangalore.com/bcb/bcb-spring-2018/bcb2018-technology/lets-know-and-lets-do-using-setu-ata211g-ivr