[79282] in North American Network Operators' Group
Re: potpourri (Re: Clearwire May Block VoIP Competitors )
daemon@ATHENA.MIT.EDU (Owen DeLong)
Fri Apr 1 15:46:31 2005
Date: Fri, 01 Apr 2005 12:45:07 -0800
From: Owen DeLong <owen@delong.com>
To: Michael.Dillon@radianz.com, nanog@merit.edu
In-Reply-To: <OF790B1C95.FBAEC95D-ON80256FD6.003F1600-80256FD6.003F8EC5@radianz.com>
Errors-To: owner-nanog@merit.edu
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Actually, that's an interesting point...
What if SIP based phones could "know" do the following:
1. If they know where they are, include:
X-Lat: N/S dd:mm:ss.sss
X-Lon: E/W ddd:mm:ss.sss
In the SIP headers.
2. If they don't know where they are, include:
X-Location: unknown
3. 911 is automatically mapped to:
SIP://e911.emergency.int
E911.emergency.int, would be resolved by ANYCAST DNS servers operated
by 911 centers. Ideally, each VOIP capable 911 call center would operate
one of these. It would return the IP address of that 911 call center's
SIP proxy.
Sure, it's not perfect, but, your topologically closest 911 call center
is not unlikely to be at least somewhat geographically closest as well.
This provides at least as good a service as cell phones without GPSs, and,
where possible, as good as cell phones with GPSs.
Just random thoughts on the subject.
Owen
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If it wasn't crypto-signed, it probably didn't come from me.
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