-----Original Message----- From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu]On Behalf Of John Fraizer Sent: Tuesday, February 15, 2005 2:31 PM To: Samantha Fetter Cc: nanog@merit.edu Subject: Re: Vonage complains about VoIP-blocking

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Hi, just wanted to let you know that a friend recently got Vonage, and they had to go through a special process to get 911

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with her address so that it would work right. I'm guessing

Samantha Fetter wrote: properly associated that means

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they have "REAL 911 access"? I'm not familiar with that all, so pardon my lack of technical terms :

Cheers, Samantha

If they had to go through a "special" process, then no. That would indicate that Vonage still doesn't have PS/ALI, at least in your friends market.

That "special" process is Vonage determining the "default" PSAP in your area and routing your 911 call to the 7-digit number for that PSAP. With PS/ALI, Vonage wouldn't be doing the routing. They would hand the call off to the 911 Selective Router which would THEN hand the call off to the appropriate PSAP based on a DIG to get your ALI information.

And with the current state of affairs, unless the head end can determine proper call centers across boundaries (can't), it probably never will.

For those of you unfamiliar with how E911 works, and specifically, PS/ALI, take a look at: http://www.xo.com/products/smallgrowing/voice/local/psali/

Or... Simply google for "PS/ALI".

That's a TDM product. http://www.e911institute.org/Roundtable%20and%20Tours/June%2024,%202004/VoIP %20E911%20Issues.pdf Page 9 offers a better description of the current E911 issues. It's a software problem. All Vonage does is map your 911 call at the PSAP to your local EMS. This is a 6/24 doc. It's slightly outdated. -M<

John