I see no other way of doing this reliably than to put some kind of
GPS device into the VoIP unit.
While I agree that GPS is the likely answer, I wasn't expecting the
ability to work inside computer rooms and basements.
It doesn't need to work in basements, etc. It only needs to keep
a
Preferably someone with mailops experience there, who can troubleshoot
what appears to be some mail delivery brokenness at prodigy.net.mx -
that is causing email to their users to be accepted by your users and
then lost.
regards
srs
--
Suresh Ramasubramanian ([EMAIL PROTECTED])
[EMAIL PROTECTED] wrote:
I see no other way of doing this reliably than to put some kind of
GPS device into the VoIP unit.
While I agree that GPS is the likely answer, I wasn't expecting the
ability to work inside computer rooms and basements.
It doesn't need to work in basements, etc. It
At 10:32 AM +0100 2005-07-20, [EMAIL PROTECTED] wrote:
While I agree that GPS is the likely answer, I wasn't expecting the
ability to work inside computer rooms and basements.
It doesn't need to work in basements, etc. It only needs to keep
a record of the last location it was at when
On Wed, 20 Jul 2005, Andre Oppermann wrote:
To sum it up: Using GPS to geo-locate VoIP phones or adapters is broken
by design.
No, it isn't. Relying on satellite connectivity to do so broken, but
that's not how it works anymore. Did you even read the article regarding
indoor GPS that I
In either case, simply keeping the last known signal lock may
very well be one of the worst things you could do.
Depends on what you want to do with the location info. If you
want to immediately dispatch a vehicle, then you have to realize
that you may be sending one to the edge of the
Mikael Abrahamsson wrote:
On Wed, 20 Jul 2005, Andre Oppermann wrote:
To sum it up: Using GPS to geo-locate VoIP phones or adapters is
broken by design.
No, it isn't. Relying on satellite connectivity to do so broken, but
that's not how it works anymore. Did you even read the article
[EMAIL PROTECTED] wrote:
In either case, simply keeping the last known signal lock may
very well be one of the worst things you could do.
Depends on what you want to do with the location info. If you
want to immediately dispatch a vehicle, then you have to realize
that you may be sending
David,
It depends a little on what sort of continuous blame the CLEC
is pointing at the ILEC... If the statement is that the ILEC fails
to show up multiple times, then cancel with the CLEC and order
elsewhere. As someone else pointed out, CLEC's are customers
of the ILEC
At 11:21 AM +0100 2005-07-20, [EMAIL PROTECTED] wrote:
On the other hand, maybe all you want to do is to route the
call to the right E911 center. In that case, as long as you
are in the right county you are probably OK.
If all you use the last known position information for is
routing
At 12:34 PM +0200 2005-07-20, Andre Oppermann wrote:
So
my guess is that the real drivers are the law enforcement agencies
wanting to get better tracking abilities. Whether they get out of
deal what they are hoping for remains
It doesn't need to work in basements, etc. It only needs to keep
a record of the last location it was at when the signal faded
away. The emergency service vehicles probably can't get any closer
than that anyway.
In the US, that might be true, but, I'm betting that could be very wrong
in places
In the US, that might be true, but, I'm betting that could be very wrong
in places like London. I'm betting the station where you boarded the
Tube could be a LONG way from where you make the 911 call.
There are very few places in the underground tube system where you
can make calls on your
I guess it also depends on what you mean by significantly. Is
a 10% solution significant?
Nope. 15% or better.
This comes from an old rule of thumb about sales, pricing, etc.
If the new supplier doesn't offer 15% or better pricing then
the hassles of switching aren't worth it. Or, you
[EMAIL PROTECTED] wrote:
In the US, that might be true, but, I'm betting that could be very wrong
in places like London. I'm betting the station where you boarded the
Tube could be a LONG way from where you make the 911 call.
There are very few places in the underground tube system where you
I would highly recommend reading Paul's comments, as he
brings up some very key issues.
He also mentioend one of my pet peeves, which is the WGIG's
posture on peering arrangements:
Vixie says:
[snip]
WGIG seems to be concerned about the general lack of
interconnection and the anticompetitive
On Wed, 20 Jul 2005, Andre Oppermann wrote:
This is unlikely. GPS reception is usually determined by sight of
horizon. For example the navigation system in my car has trouble
Looking at:
http://people.howstuffworks.com/location-tracking4.htm
Phase II - The final phase requires carriers
I think this can work. Put a battery backup in the ATA, to power the
GPS and real time clock. The ATA will maintain the internet-routable
address it's using (not necessarily it's own IP address) indefinitely.
If the ATA determines it's routable address (or /23 or whatever subnet)
has changed
On the other hand, maybe all you want to do is to route the
call to the right E911 center. In that case, as long as you
are in the right county you are probably OK.
And if by chance you end up in the wrong county, as it happens from
mobile phones on occasions, they will immediately
I think this can work. Put a battery backup in the ATA, to power the
GPS and real time clock. The ATA will maintain the internet-routable
address it's using (not necessarily it's own IP address) indefinitely.
If the ATA determines it's routable address (or /23 or whatever subnet)
has
Andre Oppermann wrote:
I have never seen any real study by the emergency response services
on how many problems they actually have other than isolated worst-
cases and a lot of political rah-rah. In the end I expect that any
technically feasible improvement to the cell phone position accuracy
--- Brad Knowles [EMAIL PROTECTED] wrote:
If the time since last fix is several hours, then
the person
might now be on a plane using a picocell or
broadband wireless
network connection that is not position-enhanced,
and using the
position information for routing to the presumed
If a person is calling 911 from a plane in flight, are
we really so concerned about which PSAP receieves the
call?The last known fix would likely have been the
point of origin in any case...
If a picocell on board an airplane receives an E911
call, it shouldn't route it to any PSAP. The
GPS does not work through the fuselage of a aluminum airplane.
I've tried. More than once.
On Wed, 20 Jul 2005 [EMAIL PROTECTED] wrote:
If a person is calling 911 from a plane in flight, are
we really so concerned about which PSAP receieves the
call?The last known fix would likely
Thus spake Kuhtz, Christian [EMAIL PROTECTED]
On the other hand, maybe all you want to do is to route the
call to the right E911 center. In that case, as long as you
are in the right county you are probably OK.
And if by chance you end up in the wrong county, as it happens
from mobile phones
On Wed, 20 Jul 2005, Alex Rubenstein wrote:
GPS does not work through the fuselage of a aluminum airplane.
I've tried. More than once.
The gps carrier frequency is 1575.42mhz
a decent gps antenna is unfortunately a bit larger than most small gps
recivers let alone cellphones. multipath
I know this is off-topic, but the engineer's engineer
died early today, ironically, on the 36th anniversaty of
the Apollo 11 lunar landing (20 July, 1969).
http://www.cnn.com/2005/SHOWBIZ/TV/07/20/obit.doohan.ap/index.html
So long, Mr. Scott. You'll be missed.
- ferg
--
Fergie, a.k.a. Paul
I was delighted this afternoon to see post on on /.
entitled Bob Metcalfe on Open Source, IPv6, IETF:
[snip]
The inventor of Ethernet Bob Metcalfe is interviewed
by AlwaysOn on current issues. Metcalfe is known for
challenging commonly accepted wisdom and this time he's
quite confrontational.
Perhaps the tube wasn't the best example, although, I remember making cell
calls from places in stations I'm pretty sure I wouldn't have gotten GPS
coverage.
In any case, the fundamental assumption that detailed location information
for
e911 on every phone or phone-like capability is desirable
Why not standardize this across the board for all access devices? As an
example if my Broadband provider was required to enter
location information in my cable modem so that when I connected a VOIP device
(ATA, IAD, PC, etc) it would query the first IP device
it encountered and gather location
Forget defeat, just look at the normal margin of error...
Forget fixed-line services, location is easy to solve for that. Let's look
at
things like a guy sitting on a mountain top with a BBQ grill antenna, and
amp,
and a WiFi card. I could make VOIP calls from Apple's public Wireless
network
Buying the hardware boxes sounds pretty attractive, but I
wondered if any industrious open sourcers have come up with anything
that any NANOG-ers have come across that would do something similar to
what the Dell 2161DS box would do. I realize we would need a server with
some cards in it
On Wed, 20 Jul 2005, Drew Weaver wrote:
Buying the hardware boxes sounds pretty attractive, but I wondered
if any industrious open sourcers have come up with anything that any
NANOG-ers have come across that would do something similar to what the
Dell 2161DS box would do. I realize we
On Wed, 20 Jul 2005, Drew
Weaver wrote:
Buying the hardware boxes sounds pretty attractive, but I
wondered if any industrious open sourcers have come up with anything
that any NANOG-ers have come across that would do something similar to
what the Dell 2161DS box would do. I realize
On Wed, Jul 20, 2005 at 04:53:36PM -0400, Drew Weaver wrote:
Buying the hardware boxes sounds pretty attractive, but I
wondered if any industrious open sourcers have come up with anything
that any NANOG-ers have come across that would do something similar to
what the Dell 2161DS box
Fergie (Paul Ferguson) wrote:
I know this is off-topic, but the engineer's engineer
died early today, ironically, on the 36th anniversaty of
the Apollo 11 lunar landing (20 July, 1969).
http://www.cnn.com/2005/SHOWBIZ/TV/07/20/obit.doohan.ap/index.html
So long, Mr. Scott. You'll be missed.
I don't know all that much about commercial VOIP service or GPS, but it
seems to me I've just read lots and lots of messages citing weird cases
where locating a VOIP phone won't work well as evidence that the whole
idea is a failure, while none of those cases appear to have much to do
with
Folks,
I've developed a tool to pull together a bunch of information from
DNSRBLs and mix it with a BGP feed, the result is that upon request I
can generate a report of all the compromised hosts on your network as
seen by various DNSRBLs.
reports are available daily in pdf, text, csv, and
At 4:19 PM -0700 2005-07-20, Steve Gibbard wrote:
At some point it makes sense to solve the problems you can solve, rather
than inventing new ones.
True enough. However, the tough problems are always the ones you
never thought of before you started building the system. Therefore,
it
[EMAIL PROTECTED] wrote:
On the other hand, maybe all you want to do is to route the
call to the right E911 center. In that case, as long as you
are in the right county you are probably OK.
This is actually more important then it sounds. Not long ago I was
driving around in Northern New
On Wed, 20 Jul 2005, Joseph S D Yao wrote:
If you want console access whether up or down, and are willing to settle
for serial console access, Cyclades has stackable boxes with 48 ports
each, and there exist cards (PC Weasel, http://www.realweasel.com/)
that allow you to work with PC systems
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