There is an interesting article in Telephony Online about the prospects for strengthening E911 requirements for VoIP providers.
The article details some of the challenges involved in offering emergency calling through “nomadic” services like Vonage and 8×8. Apparently, many public safety answer point (PSAP) administrators won’t let nomadic providers interconnect through the dedicated 911 network. “That network automatically routes 911 calls to the appropriate PSAP based on the caller’s location and, if the PSAP supports enhanced 911, also delivers the caller’s address,” the article says.