Because landlines are dying, VoIP providers must sell 24-hour batteries

As phone providers like AT&T and Verizon seek to phase out copper telephone networks in favor of fiber- and wireless-based VoIP (Voice over Internet Protocol) services, the Federal Communications Commission must consider whether to require home phones to work during power outages. Federal Communications Commission Chairman Tom Wheeler has decided what the requirement should be -- carriers will have to offer 24-hour backup systems, but they'll be able to charge consumers for the batteries. Chairman Wheeler circulated his proposal to fellow commissioners on July 10 and will put it to a vote on August 6. If it's approved in its current form, VoIP providers will have to offer 8-hour backup systems immediately and 24-hour backups within three years.

The new rules would apply not just to legacy voice providers with copper networks, but to any home VoIP service, such as those offered by cable companies. Maintaining 911 service during long power outages is one of the main goals. There shouldn't be any technical limitations that would prevent implementation. Verizon already sells its fiber customers a $40 battery that can power voice service (either VoIP or traditional landline service over fiber) for "up to 8 hours" during an electric outage.