[VOIPSEC] Off-topic 411/311/211 question
br at brianrosen.net
Fri Apr 17 16:17:18 BST 2009
Hmmm, I missed the reply. Must check my spam filter.
To J. Oquendo: There is no such list AFAIK. It's all very local, and there
is no organized effort to collate it. There is a new organization NESIC
(N11/8XX Essential Services Interoperability Council) that is working
towards more harmonization of these services. There is a major project
underway to redesign the emergency call (9-1-1) system to move it to an IP
network. This is called "Next Generation 9-1-1". The call routing
mechanisms for NG9-1-1 are derived from a new IETF protocol (LoST). The
mechanisms are designed so that they can be used by all the NESIC services.
As the service boundaries for the services are not aligned, and are not
aligned with anything you can easily determine, just having a list like you
are describing is not enough: you have to know the location of the caller,
and you have to know the service boundary of the relevant service. Neither
is simple to come by. The NG9-1-1 mechanisms address this, but they are not
Daniel: The design of the North American Number Plan does allow you to
determine which state a telephone number is supposed to be in, because Area
Codes (first three digits) don't cross state boundaries. However, wireless
and VoIP phones don't have a restriction that the caller has to be located
in the state where the area code implies they are, so you can't use the TN
to make a route decision like this. You have to know where the callers
location is. This is the same as emergency call. It's not just roaming.
You can keep your phone number, which was assigned in New York State, when
you move to California. With VoIP, you can choose whatever area code you
want your number to be in.
Further, the services that are being discussed are not uniform across
states. They are typically a city or regional service. The service
boundaries do not match any telephone number derivable areas.
From: Danijel Starman [mailto:Danijel.Starman at iskon.hr]
Sent: Friday, April 17, 2009 6:09 AM
To: 'J. Oquendo'; Brian Rosen
Cc: voipsec at voipsa.org
Subject: RE: [VOIPSEC] Off-topic 411/311/211 question
> -----Original Message-----
> From: voipsec-bounces at voipsa.org
> [mailto:voipsec-bounces at voipsa.org] On Behalf Of J. Oquendo
> Sent: 16. travanj 2009 20:03
> To: Brian Rosen
> Cc: voipsec at voipsa.org
> Subject: Re: [VOIPSEC] Off-topic 411/311/211 question
> On Thu, 16 Apr 2009, Brian Rosen wrote:
> > Was this what you were looking for?
> > http://www.nanpa.com/number_resource_info/n11_codes.html
> Yes, no... Sort of ;) I'm familiar with most of the numbers,
> was wondering if someone had the _XXX to direct DID listing.
> For example, 311 in New York can be accessed via 212NEWYORK
> so I can create dialplans on VoIP systems to map the 3 digit
> to the true number for whatever area code.
> 211 in Connecticut is a join State slash United Way venture.
> So what's happening is, many a trunks we provide aren't sure
> where to map these numbers... Enter pre-emptive strike on our
> end to rid ourselves of the headache in explaining why someone
> on VoIP based phones in NYC can't get to 611... We can re-map
> it to Verizon's direct network or so.
I'm not familiar with the US dailplan so this may not be possible...
Does the state have an unique prefix? Can you send the call into the
network with the state prefix ie, if your user is in Connecticut
(lets say prefix is 123) and dials 211 you send it to your IC link
with the provider you think operates the number with 123211.
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