[cpsns]

Yes, but it’s probably not a landline in the way most people think. Almost all those services use voip backends now with only the last mile being copper.

[310260]

Exactly! And especially if it's provided by a cable ISP. It's just VoIP. Maybe with some QoS on their network and battery backup.

It's not a real circuit-switched network with its own power supply like traditional POTS service.

[bovermyer]

Well that's unfortunate.