Just so everyone is aware and may want to voice their opinion on this law proposal.
There is an ongoing petition to make it a federal law to require all PBX to have 911 functionality.
https://www.change.org/p/require-all-mlts-pbx-phones-dial-911-easily-help-enact-kari-s-law?source_location=petition_footer&algorithm=curated_trending&grid_position=14
And it looks like it is being picked up.
https://www.change.org/p/require-all-mlts-pbx-phones-dial-911-easily-help-enact-kari-s-law/u/14463586
I know E911, can be implemented properly and even with dial plan that covers 911 9911 and other combinations to ensure it gets dialed out, I also found this site with the current state laws:
http://www1.911enable.com/resource-center/state-e911-legislation
I think it would be great if the law included a E911 voip provision with a federal maintained 911 voip endpoint. Which can be used as a failover local 911 or PSTN is unresponsive.
I wanted to share this and hear other peoples opinion on the subject.