the TPG system is limited to 8 rings on the land line with apparently no way of extending this.
This is way too short for elderly or people with mobility issues. Based on this and other issues when calling the help line I will not be recommending TPG. (I work in the aged and disability sector)
I agree, some other providers have this option to extend incoming 'phone rings'. But IMO, I consider TPG have the most affordable service in the market.
Does all the incoming call reached 8 'rings'? Because if not, you can ask their assistance to check it out for you.