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RE: AW: Ofcom VoIP Public Forum

  • To: "Jim Reid" < >
  • From: "Stastny Richard" < >
  • Date: Tue, 16 Mar 2004 10:09:08 +0100
  • Cc: "Christian de Larrinaga" < >
    "Conroy, Lawrence (SMTP)" < >
    "Kennedy, Steve" < >
    < >


> -----Original Message-----
> From: Jim Reid [
] > Sent: Tuesday, March 16, 2004 1:02 AM > To: Stastny Richard > Cc: Christian de Larrinaga; Conroy, Lawrence (SMTP); Kennedy, > Steve; enum-trials@localhost > Subject: Re: AW: Ofcom VoIP Public Forum > > > >>>>> "Richard" == Stastny Richard <Richard.Stastny@localhost writes: > > Richard> So from the number you also get the location - aha that > Richard> is the reason. So you get a location on mobile calls - > Richard> since when? Nobody cared 10 years ago. > > I'm not sure I understand the point you're trying to make here. > > It is more than possible for a mobile phone's location to be > identified. Emergency services can and do use triangulation > of a phone's signal to its base stations to work out where a > mobile phone is physically located. [Almost every week the > mountain rescue people do this to save lost or injured > hillwalkers and climbers on the Scottish mountains.] This > location info is obviously much more important than any > billing address for the phone's owner (if there is one). Now > I suppose there's no parallels for that kind of thing with > VoIP. Somebody could be using NAT or tunnelling and that > would mean the SIP server has no idea where the SIP session > originated from. The point I am trying to make is that this triangluation stuff is quite recent and has been introduced after 10 years of operation. At the IETF there is a lot going on to solve the location problem and I beleive that there will be a solution after 10 years, even with the currently slow pace of IETF. On the other hand, I do not believe that you will have soon WLAN access and laptops in the Scottish montains. I also want to have more responsibility to the user. I can imagine that if you go to the mountain with a PDA and WLAN access, you may have also a GPS attached. And the problem of VPNs is also know to private networks with more then one access to the PSTN, but no reason to not allow emergency access. What is important is that the Emergency center knows about the reliability of the location information. I am currently working on a proposal to allow emergency calls to emergency centers. Richard

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