The cadence for pots lines is typically a two second ring and a four second pause. So about ten times, the last (10th)ring will probably go slightly past 1 min.

Perfect. Thanks.
When do answering machines normally pick up? What ring?

My landline rang 4 times in 20 seconds, suggesting 12 times in a minute.
My answering machine has two settings, pick up after 4 rings, or 6 rings.

My machine answers at 6 rings if there is no calls on the answering machine, if the is an unheard message the machine will answer after 4 rings.

Thanks.