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Posted by Steven Lichter on November 26, 2007, 12:25 pm
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connected you to an emergency center,you had to supply the information,
but a trace could be made. They used to advertise it with: If in a fix
dial 116. Any other cities have anything like this years ago?
Diamond Dave wrote:
> On Sun, 25 Nov 2007 12:04:47 -0500 (EST), hancock4@bbs.cpcn.com wrote:
>
>> 1) Nearly half of the U.S. territory is still without 911 centers that
>> can find wireless callers (mostly in rural areas, but that's where the
>> need could be greatest.)
>
> Doesn't surprise me. There are many areas of the US that are still
> analog phone service, particularly in the rural west.
>
>> 2) There are 109 counties that have no 911 service of any kind at all,
>> a regular 7 or 10 digit number must be used to summon help.
>
> That number does surprise me. I know that the county surrounding
> Pittsburgh (Allegheny County) in Pennsylvania was the last major area
> in the US that didn't have 911 service. It was well into the 90s that
> the area I grew up in finally got 911. The major reason was that each
> tiny municipality (township, borough, etc.) had their own emergency
> services, but didn't have the money for 911. The township I lived in
> finally had 911 by the early 90s, but that was just a three-digit call
> forward type of arrangmenet for the 7 digit (at that time) police
> number. Eventually the service was upgraded for enhanced 911 service
> pretty much county wide, but most of the municpialities still handle
> their own 911 or go in as a group of townships/boroughs.
>
>> I had presumed the entire country had advanced 911 service which
>> would, for landline callers, give the 911 center the caller's
>> address. Originally 911 just acted as a routing number and seized the
>> trunk. Later enhancements gave it more sophistication including
>> passing information about the caller based on their phone number from
>> a database.
>
> 911 came in three stages:
>
> 1) A simple number for people to remember and dial, but all that did
> was just call the emergency center like a 7 digit number would.
>
> 2) When the caller called 911, the switch seized a speciall trunk to
> the emergency center and sent the ANI of the person's phone number. On
> landline phones, the caller's line can be "held up" just like an
> operator can (in other words, the line couldn't be hung up until the
> 911 operator dropped their end).
>
> 3) Enhanced 911 with databases with street addresses and probably
> maps.
>
>> Isn't the entire US now ESS, perhaps not all digital ESS, but at least
>> electronic switched?
>
> Since late 1999, all the US has some sort of electronic switching
> system. Most are true digital with a handful of analog ESS. I think
> all these analog switches are 1AESS.
>
>> Since some parts of the country have no 911 at all, I wonder how many
>> other parts have old-style 911.
>
> I'd say quite a few.
>
>> I also wonder how well location-finding for cell phone calls works.
>> Plenty of people still have older handsets that don't have GPS and of
>> course can't send any information. I wonder how good they can
>> translate a coordinate location into a street address location,
>> particularly in a built up area, or, in a confusing area with many
>> buildings and odd streets and driveways.
>
> Depends on the person and how familiar they are with the area. Also,
> in rural areas you're lucky to get one tower, let alone two or three
> to get a good trianglulation.
>
>> (My own local govt's 911 service quality/capability is unknown as they
>> refuse to discuss it for "security reasons", even when a citizen has
>> had problems with it.)
>
> I'd talk to your local government and not the emergency services
> folks.
>
> Dave
>
--
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