I completely and totally disagree. Please don't tell customer phone line is not necessary. Number one WE need to have a return path as contracts with DTV indicate that there is a standard for return path hookup and I would not want to take a hit in metrics OR a chargeback for not doing so. Secondly, any IRD is going to dial out and receive software on a daily basis, usually around 2 AM. It's not just for PPV.
sorry but you're wrong. When I got D* the tech knew I was cell only. He noted it with D* when he called it in. Also software is done via satellite.
Phone line isnt necessary. I just helped my mom upgrade a SD receiver to HD and the rep said that she wouldnt be able to order PPV or have caller ID