Re: [asterisk-users] Please some enlightment on ENUM !!

[Norbert Zawodsky]

Hi Philipp!

Philipp Kempgen schrieb:
> Where exactly did you register your DNS server? Did your registrar
> handle it for you? http://www.nic.at ? http://www.enum.at ?
>   
Yes, my registrar http://www.my-enum.at handles it. (my-enum.at seems to
be a sub-company of nic.at)
First you have to register your telephone number (which is done after
validating that it's really your number).
Then you can
  *either* enter service-uri's to that number (sip: mailto: )
  *or* "assign" a "domain specific Nameserver" to that nuber.

Norbert

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Re: [asterisk-users] Please some enlightment on ENUM !!

[Philipp Kempgen]

Norbert Zawodsky schrieb:

> BTW, meantime I have alread implemented all that. My DNS server is up &
> running.
> I've chosen one of the existing registrars and payed him for registering
> 7.6.5.4.3.2.1.1.3.4.e164.arpa as "my" number at nic.at.
> The registrar vaildated that this really is my number, and when this was
> confirmed, did the registration.
> Then I registerd my DNS server as the authorative master for the domain
> *.7.6.5.4.3.2.1.1.3.4.e164.arpa

Where exactly did you register your DNS server? Did your registrar
handle it for you? http://www.nic.at ? http://www.enum.at ?

> That's it. It works!

That's good news!

> When ever anyone anywhere in the world does a ENUMLOOKUP(mynumber), my
> server receives a request and (hopefully) sends the correct answer.


Philipp Kempgen
-- 
AMOOMA GmbH - Bachstr. 126 - 56566 Neuwied  ->  http://www.amooma.de
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Re: [asterisk-users] Please some enlightment on ENUM !!

[Norbert Zawodsky]

SIP schrieb:
>
> By the time telephone operators began to be replaced by mechanical
> switches, open numbering plans became impossible to design for. Once
>   
Sorry, but there was definitely a time between retired human operators
and software switches.
And during that period, "our" open numbering plan worked perfectly well.
(And it still does)
> software switches came about and massive modifications to numbering
> plans became as easy as coding new exceptions and pushing them out to
> the millions of switches on the network, numbering plans had, largely,
> been codified to make for logical and understandable patterns.
>
>   
> ENUM has no issues with variable length numbering plans in its design.
> However, you have to stop calling it ENUM if it gets above 15 digits,
>   
AFAIR, there was no call for extending ENUM above 15 digits.
> since it's no longer a valid E164 numbering scheme as per the design
> there. ENUM is even applicable to local-only dialing plans, in which
> you'd run your own server, point your phones to that server as their
> primary ENUM server, and off you go.
>
> It's a very flexible idea as far as mapping E164 numbers to services go.
> However, once you get into the realm of registering with the IANA
> approved servers and trying to place your own ENUM DNS server into the
> mix, you can't start mixing local-only and public numbering schemes or
> things break.
>   
No one starts *mixing* local and public numbering scemes! It is very simple.

If you rent 1 line from, you'll get a number assigned. For example
+4311234567
You can place only 1 concurrent casl over that line (or 2, if it's an ISDN)
*Below* that number you can do what ever you want as long as the length
is <15: +4311234567[x]
If that is too less for your needs, you can rent a trunk of 10 lines
Then you'll probably get a number assigned like +431123456 and you can
use +431123456[xx] for your own neeeds.

And so on 
> Austria is somewhat of a special case in which their numbering schemes
> are such that they allow the ad-hoc creation of additional virtual DIDs
> by simply tacking on digits to a valid DID. It's an open numbering plan,
> but from what I gather, it's a variation of the traditional open
> numbering plan in that each DID owner or designate gets to create his
> own additions instead of the telco approving all variable-length DIDs.
> This doesn't break any ENUM rules (unless the number exceeds 15 digits),
> but it does create a scenario in which it may become difficult to apply
> traditional ENUM tools to the scenario at hand with an attempt to get
> the results you're after.
>   
Sorry, but why? I don't understand your point. Why would it be difficult
for ENUM tools?
> For instance, if user X owns the number +4311234567, and he decides he
> wants to create a slew of virtual DIDs after that (+4311234567[01-99]),
> it doesn't violate the ENUM standard because all those numbers are fewer
> than 15 digits, and therefore all valid E164 numbers.  But the question
> was how to register them and if user X should create his own DNS server
> to handle the ENUM mappings. User X is free to do this, but then how is
> that server reached to map those numbers? There are certain 'accepted'
> ENUM registrars that have been IANA approved. User X could attempt to
> get his own approved, but even then, most existing ENUM tools would
> still not know of its existence, since it would be new.
>   
No! It's just like with any other name-to-IP resolution.
If you operate your own server, you just have to tell your ISP to route
DNS requests regarding *.YOURDOMAIN.TLD to your server.
Any ISP should do this if you want. (At least, here in Austria every ISP
does it)

It's the same with e164.arpa requests.

BTW, meantime I have alread implemented all that. My DNS server is up &
running.
I've chosen one of the existing registrars and payed him for registering
7.6.5.4.3.2.1.1.3.4.e164.arpa as "my" number at nic.at.
The registrar vaildated that this really is my number, and when this was
confirmed, did the registration.
Then I registerd my DNS server as the authorative master for the domain
*.7.6.5.4.3.2.1.1.3.4.e164.arpa
That's it. It works!
When ever anyone anywhere in the world does a ENUMLOOKUP(mynumber), my
server receives a request and (hopefully) sends the correct answer.

> Options are (as were provided) to register each of those numbers with an
> approved registrar (bulk registrations are often available), or in some
> way to convince a registrar to forward any and all requests to
> +4311234567[XX] to User X's DNS server. THAT might be tricky, but it
> creates a logical scenario in which there are 2 extra digits of a
> variable nature to pass off to the DNS server of the registrar and then
> forward to User X's DNS server. 
>
> However, when you get into the idea of creating additional digits, it
> may become tricky simply because of the way DNS handles requests.  No
> longer do you have a simple *.*.7.6.5.4.3.2.1.1.3.4.e164.arp

Re: [asterisk-users] Please some enlightment on ENUM !!

[SIP]

John Novack wrote:
> Raimund Sacherer wrote:
>   
>>> Adding random digits to a PSTN and expecting to get the same person at a
>>> different extension  you don't think that's a hack? I do. One should
>>> 
>>>   
>> Sorry, please do not call a whole country using a hack when their solution is
>> legitimate.
>>
>> Austrian PSTN
>> https://supportforums.cisco.com/docs/DOC-1343
>>
>> Excerpt:
>> Dialplan
>> The Austrian dialplan is a variable length numbering plan, which consists of 
>> area codes and subscribers numbers. Area Codes are from 1 to 4 digits in 
>> length, subscriber numbers vary even more. Some Numbers (mostly used by 
>> companies) allow the use of Direct Inward Dial Extension. If such a number 
>> is used, it is up to the company to decide on the length of extensions, 
>> meaning that any length can be used.If too long extensions are used, the 
>> numbers might not be reachable from some sources. This is especially 
>> relevant with regard to number presentation inside of isdn, as stated under 
>> "Voice Interfaces and signalling".
>>  
>> A copy of the Austrian dialplan is maintained by the austrian regulatory 
>> council at http://www.rtr.at/en/tk/nationaleRufnummern.
>>
>>
>> The emphasis on "variable length numbering", if you consider that austria is 
>> a small country which is physically not able to harbor more than 16 million 
>> peoples in a sane way, the numbering plan is more then sufficient, austria 
>> is not like germany with > then 88 million inhabitants which needed a 
>> reconfiguration of their numbering plan some years ago.
>>
>> my 2cents
>>
>> Raimund
>>   
>> 
> For those who have no background in telecom history, this may seem 
> strange, but in fact in bygone years this was not JUST Austria that had 
> this scheme. In the Electro-mechanical days what some of us know as 
> Direct Inward Dialing ( not the DID term often misused in modern times ) 
> was handled this way in open numbering plans.
> It is unfortunate, but all too common, that in a great many fields,very 
> smart educated people are ignorant of the history of their field, and 
> are doomed to re-invent the wheel, or proceed down a blind alley.
>   

By the time telephone operators began to be replaced by mechanical
switches, open numbering plans became impossible to design for. Once
software switches came about and massive modifications to numbering
plans became as easy as coding new exceptions and pushing them out to
the millions of switches on the network, numbering plans had, largely,
been codified to make for logical and understandable patterns.

> In North America, with a closed numbering plan, all numbers are of a 
> fixed length, 10 digits. Technically the "one" is NOT part of the 
> number. In earlier days, no "one" was needed even for toll calling to 
> distant cities and area codes. Some, fewer each year, are able to dial 
> within their NPA with 7 digits. with the NANP turned over to the inmates 
> ( the state PSC's ) some locales require 11 digits for all calls, others 
> 10 for local, 11 for toll, and others 10 digits for all calls.
> The closed number plan is somewhat easier to parse, with its fixed 
> length, and no timeout or send/end digit is needed. the open plan can be 
> more efficient in use of numbers. Different locale dialing pattens do 
> make that more of a challenge, however.
> How all of this works in regard to ENUM is for others to decide, but if 
> it cannot handle an open numbering plan with variable length numbers it 
> needs fixing.
>
> John Novack 
>
>   
ENUM has no issues with variable length numbering plans in its design.
However, you have to stop calling it ENUM if it gets above 15 digits,
since it's no longer a valid E164 numbering scheme as per the design
there. ENUM is even applicable to local-only dialing plans, in which
you'd run your own server, point your phones to that server as their
primary ENUM server, and off you go.

It's a very flexible idea as far as mapping E164 numbers to services go.
However, once you get into the realm of registering with the IANA
approved servers and trying to place your own ENUM DNS server into the
mix, you can't start mixing local-only and public numbering schemes or
things break.

Austria is somewhat of a special case in which their numbering schemes
are such that they allow the ad-hoc creation of additional virtual DIDs
by simply tacking on digits to a valid DID. It's an open numbering plan,
but from what I gather, it's a variation of the traditional open
numbering plan in that each DID owner or designate gets to create his
own additions instead of the telco approving all variable-length DIDs.
This doesn't break any ENUM rules (unless the number exceeds 15 digits),
but it does create a scenario in which it may become difficult to apply
traditional ENUM tools to the scenario at hand with an attempt to get
the results you're after.

For instance, if user X owns the number +4311234567, and he decides he
wants to create a 

Re: [asterisk-users] Please some enlightment on ENUM !!

[SIP]

Raimund Sacherer wrote:
>> Adding random digits to a PSTN and expecting to get the same person at a
>> different extension  you don't think that's a hack? I do. One should
>> 
>
> Sorry, please do not call a whole country using a hack when their solution is
> legitimate.
>
> Austrian PSTN
> https://supportforums.cisco.com/docs/DOC-1343
>
> Excerpt:
> Dialplan
> The Austrian dialplan is a variable length numbering plan, which consists of 
> area codes and subscribers numbers. Area Codes are from 1 to 4 digits in 
> length, subscriber numbers vary even more. Some Numbers (mostly used by 
> companies) allow the use of Direct Inward Dial Extension. If such a number is 
> used, it is up to the company to decide on the length of extensions, meaning 
> that any length can be used.If too long extensions are used, the numbers 
> might not be reachable from some sources. This is especially relevant with 
> regard to number presentation inside of isdn, as stated under "Voice 
> Interfaces and signalling".
>  
> A copy of the Austrian dialplan is maintained by the austrian regulatory 
> council at http://www.rtr.at/en/tk/nationaleRufnummern.
>
>
> The emphasis on "variable length numbering", if you consider that austria is 
> a small country which is physically not able to harbor more than 16 million 
> peoples in a sane way, the numbering plan is more then sufficient, austria is 
> not like germany with > then 88 million inhabitants which needed a 
> reconfiguration of their numbering plan some years ago.
>
> my 2cents
>
> Raimund
>   
It may be an effective hack, but it's a hack. I'm not saying the people
of Austria are hacking their phone system. That's an entirely different
definition of the word 'hack.' 

And the application here is in terms of ENUM... which is an E164 mapping
system. When you start playing fast and loose with the E164 numbering
scheme (going above 15 digits, for example), I don't care how cool or
useful it is, it's a violation of a standard. Standards are there for a
reason... so people can create order from chaos. Adding in extra chaos
just to satisfy one particular subset of people is still a bad idea. I
don't care if the Austrian telecom advertises that everyone can make his
own 16-digit number for the price of a can of cheez-whiz and a can of
soup, the simple fact is ENUM is designed to map E164 numbers to
services and a 16-digit number is NOT a valid E164 number. Doesn't
matter if the entire country of Austria has one, it's still not valid as
per the description of E164.

You can say I'm being insensitive to Austrians or whatever you'd like,
but that's not the case. I honestly think it's a neat idea what they've
done with their numbering plan. But it's still a hack.  And you can't
violate a standard and then ask why your newly-devised rules don't work
in situations applied to the standard.

E164 -> max 15 digits

ENUM -> E164 mapping as a UNIQUE identifier for services.

16-digit Austrian number != E164. Therefore, attempting to ascertain why
a 16-digit number doesn't work well with ENUM should be a bit of a
no-brainer.

And with 11-15-digit numbers, you're still playing fast and loose with
the concept of 'unique' in the whole unique identifier bit. When 20
numbers essentially map to the same thing, it's no longer unique. It's
only unique-ish. 

Quote more from Austrian regulations. Please. It doesn't make their
solution any less of a hack. It just makes it a widely-accepted and
intentional hack. Again... it's a neat hack. It's a cool hack.

But it's still a hack.

N.

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Re: [asterisk-users] Please some enlightment on ENUM !!

[John Novack]

Raimund Sacherer wrote:
>> Adding random digits to a PSTN and expecting to get the same person at a
>> different extension  you don't think that's a hack? I do. One should
>> 
>
> Sorry, please do not call a whole country using a hack when their solution is
> legitimate.
>
> Austrian PSTN
> https://supportforums.cisco.com/docs/DOC-1343
>
> Excerpt:
> Dialplan
> The Austrian dialplan is a variable length numbering plan, which consists of 
> area codes and subscribers numbers. Area Codes are from 1 to 4 digits in 
> length, subscriber numbers vary even more. Some Numbers (mostly used by 
> companies) allow the use of Direct Inward Dial Extension. If such a number is 
> used, it is up to the company to decide on the length of extensions, meaning 
> that any length can be used.If too long extensions are used, the numbers 
> might not be reachable from some sources. This is especially relevant with 
> regard to number presentation inside of isdn, as stated under "Voice 
> Interfaces and signalling".
>  
> A copy of the Austrian dialplan is maintained by the austrian regulatory 
> council at http://www.rtr.at/en/tk/nationaleRufnummern.
>
>
> The emphasis on "variable length numbering", if you consider that austria is 
> a small country which is physically not able to harbor more than 16 million 
> peoples in a sane way, the numbering plan is more then sufficient, austria is 
> not like germany with > then 88 million inhabitants which needed a 
> reconfiguration of their numbering plan some years ago.
>
> my 2cents
>
> Raimund
>   
For those who have no background in telecom history, this may seem 
strange, but in fact in bygone years this was not JUST Austria that had 
this scheme. In the Electro-mechanical days what some of us know as 
Direct Inward Dialing ( not the DID term often misused in modern times ) 
was handled this way in open numbering plans.
It is unfortunate, but all too common, that in a great many fields,very 
smart educated people are ignorant of the history of their field, and 
are doomed to re-invent the wheel, or proceed down a blind alley.

In North America, with a closed numbering plan, all numbers are of a 
fixed length, 10 digits. Technically the "one" is NOT part of the 
number. In earlier days, no "one" was needed even for toll calling to 
distant cities and area codes. Some, fewer each year, are able to dial 
within their NPA with 7 digits. with the NANP turned over to the inmates 
( the state PSC's ) some locales require 11 digits for all calls, others 
10 for local, 11 for toll, and others 10 digits for all calls.
The closed number plan is somewhat easier to parse, with its fixed 
length, and no timeout or send/end digit is needed. the open plan can be 
more efficient in use of numbers. Different locale dialing pattens do 
make that more of a challenge, however.
How all of this works in regard to ENUM is for others to decide, but if 
it cannot handle an open numbering plan with variable length numbers it 
needs fixing.

John Novack 

--


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Re: [asterisk-users] Please some enlightment on ENUM !!

[Raimund Sacherer]

> Adding random digits to a PSTN and expecting to get the same person at a
> different extension  you don't think that's a hack? I do. One should

Sorry, please do not call a whole country using a hack when their solution is
legitimate.

Austrian PSTN
https://supportforums.cisco.com/docs/DOC-1343

Excerpt:
Dialplan
The Austrian dialplan is a variable length numbering plan, which consists of 
area codes and subscribers numbers. Area Codes are from 1 to 4 digits in 
length, subscriber numbers vary even more. Some Numbers (mostly used by 
companies) allow the use of Direct Inward Dial Extension. If such a number is 
used, it is up to the company to decide on the length of extensions, meaning 
that any length can be used.If too long extensions are used, the numbers might 
not be reachable from some sources. This is especially relevant with regard to 
number presentation inside of isdn, as stated under "Voice Interfaces and 
signalling".
 
A copy of the Austrian dialplan is maintained by the austrian regulatory 
council at http://www.rtr.at/en/tk/nationaleRufnummern.


The emphasis on "variable length numbering", if you consider that austria is a 
small country which is physically not able to harbor more than 16 million 
peoples in a sane way, the numbering plan is more then sufficient, austria is 
not like germany with > then 88 million inhabitants which needed a 
reconfiguration of their numbering plan some years ago.

my 2cents

Raimund
-- 
-- 
Raimund Sacherer
-
RunSolutions
 Open Source It Consulting
-
Email: r...@runsolutions.com

Parc Bit - Centro Empresarial Son Espanyol
Edificio Estel - Local 3D
07121 -  Palma de Mallorca
Baleares

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Re: [asterisk-users] Please some enlightment on ENUM !!

[SIP]

Benny Amorsen wrote:
> SIP  writes:
>
>   
>> It may work in Austria, and may even be valid in Austria. But if that's
>> the case, it's because Austrian dialing is a complete hack -- NOT
>> because that's the way it's intended OR designed.
>> 
>
> Err no? It's perfectly sane, and it was intended and designed that way.
>
> You are providing no justification at all for your opinion that it is a
> hack. It is quite apparent where the "hack" is in this thread.
>
>
> /Benny
>   
Adding random digits to a PSTN and expecting to get the same person at a
different extension  you don't think that's a hack? I do. One should
generally assume that my posts are my opinion, which really doesn't need
any more justification than "I think so."   If I have to start putting
legal disclaimers at the bottom of my posts stating "everything in this
post is considered the opinion of the poster and should not be presumed
to be the opinion of anyone else" just to make sure that's understood,
I'll be happy to do so, but it will be both silly and pointless.

An ENUM number is a mapping of an E164 number to a service. If, in
Austria, you 'own' all numbers that are your PSTN number plus any string
of random digits, that's great... but it doesn't work that way in most
of the rest of the world (I'd wager ALL of the rest of the world, but
that's based again on supposition without accompanying hard data and
spreadsheets and pie charts), and if the incumbent telecoms in the world
thought people would use that methodology to cheat them out of money for
additonal DIDs, they'd clamp down on it in a hurry.

But regardless of how they do things in Austria, the fact remains that
the original poster was asking a question about how to configure ENUM so
that his phone extensions reached his correct targets. The suggestion by
the registrar was only to register the main number. Suggestions by
myself and some others were to register the main number and any other
numbers. It was never stated that this was a limited subset country in
which dialing codes are relaxed and non-standard, and so the information
provided was, perhaps, not acceptable for the use case given the data
provided. For making assumptions based on limited information, I apologise.

But for thinking that such a dialing system is a distortion of the ENUM
concept? I don't apologise one bit.

And if you choose to go above 15 digits, you're violating not just ENUM,
but the E in ENUM, since an E164 number is limited to 15 digits.


N.



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Re: [asterisk-users] Please some enlightment on ENUM !!

[Benny Amorsen]

SIP  writes:

> It may work in Austria, and may even be valid in Austria. But if that's
> the case, it's because Austrian dialing is a complete hack -- NOT
> because that's the way it's intended OR designed.

Err no? It's perfectly sane, and it was intended and designed that way.

You are providing no justification at all for your opinion that it is a
hack. It is quite apparent where the "hack" is in this thread.


/Benny


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Re: [asterisk-users] Please some enlightment on ENUM !!

[SIP]

Philipp Kempgen wrote:
> Leif Neland schrieb:
>   
>> Norbert Zawodsky skrev:
>> 
>
>   
>>> The number +43-1-3207978 is my telephone number. I "own" it as long as I
>>> pay for it. And with extra digits behind it I can do whatever I like. I
>>> can create any extension - physical or virtual. I can attach a phone to
>>> extension 12, attach a virtual fax server for extension 12 to extension
>>> 99912 or could fire up my toaster if I call extension 911.  I can invent
>>> any numbering scheme for my company. That's a fact!  Again - At least
>>> here in Austria !! (can't speak for other countries)
>>>   
>> Invent all you want, nobody can call those fantasy-numbers anyway. 
>> Perhaps, a fraction of a percent, who are using ENUM.
>> 
>
> Leif, ever heard of direct inward dialing and PRI?
> http://en.wikipedia.org/wiki/Direct_inward_dialing
> http://en.wikipedia.org/wiki/Primary_rate_interface
> You can actually own a block of numbers like 01234567.
> You are free to map these  DID numbers to extensions or do
> what ever you like. And it is guaranteed that nothing in the
> 01234567... range will ever be assigned to a different PSTN
> subscriber.
>
>
> Philipp Kempgen
>   
Exactly. And in such a case, this is exactly what the ENUM DNS is
designed for -- handling those blocks.  NOT for creating additional
digits on top of one existing number.

It may work in Austria, and may even be valid in Austria. But if that's
the case, it's because Austrian dialing is a complete hack -- NOT
because that's the way it's intended OR designed.

N.

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Re: [asterisk-users] Please some enlightment on ENUM !!

[Leif Neland]

Philipp Kempgen wrote:

Leif Neland schrieb:
  

Norbert Zawodsky skrev:



  

The number +43-1-3207978 is my telephone number. I "own" it as long as I
pay for it. And with extra digits behind it I can do whatever I like. I
can create any extension - physical or virtual. I can attach a phone to
extension 12, attach a virtual fax server for extension 12 to extension
99912 or could fire up my toaster if I call extension 911.  I can invent
any numbering scheme for my company. That's a fact!  Again - At least
here in Austria !! (can't speak for other countries)
  
Invent all you want, nobody can call those fantasy-numbers anyway. 
Perhaps, a fraction of a percent, who are using ENUM.



Leif, ever heard of direct inward dialing and PRI?
http://en.wikipedia.org/wiki/Direct_inward_dialing
http://en.wikipedia.org/wiki/Primary_rate_interface
You can actually own a block of numbers like 01234567.
You are free to map these  DID numbers to extensions or do
what ever you like. And it is guaranteed that nothing in the
01234567... range will ever be assigned to a different PSTN
subscriber.

  

Ok ok, I may have been too harsh...

Here in Denmark, when you have the number 12345678, that's it, you don't 
get 12345678xxx

That it's different in OP's country Austria, I didn't know.
In that case, it makes perfectly sense to subdelegate enum, although 
perhaps it should just be a wildcard, so every number in the 
12345678-domain goes to the same "entrypoint" just as a pstn-call does.
Otherwise it could be confusing that when extension 10 changes physical 
sip-adress, you also have to remember to change the enum.

Even more, enum-ing a number directly to a sip-phone sounds impractical.

I know about blocks. When 3 major banks in Denmark joined in the end of 
last century, they got the block  with  being their main 
number, and the 'es for extensions.


Leif

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Re: [asterisk-users] Please some enlightment on ENUM !!

[Philipp Kempgen]

Leif Neland schrieb:
> Norbert Zawodsky skrev:

>> The number +43-1-3207978 is my telephone number. I "own" it as long as I
>> pay for it. And with extra digits behind it I can do whatever I like. I
>> can create any extension - physical or virtual. I can attach a phone to
>> extension 12, attach a virtual fax server for extension 12 to extension
>> 99912 or could fire up my toaster if I call extension 911.  I can invent
>> any numbering scheme for my company. That's a fact!  Again - At least
>> here in Austria !! (can't speak for other countries)
> 
> Invent all you want, nobody can call those fantasy-numbers anyway. 
> Perhaps, a fraction of a percent, who are using ENUM.

Leif, ever heard of direct inward dialing and PRI?
http://en.wikipedia.org/wiki/Direct_inward_dialing
http://en.wikipedia.org/wiki/Primary_rate_interface
You can actually own a block of numbers like 01234567.
You are free to map these  DID numbers to extensions or do
what ever you like. And it is guaranteed that nothing in the
01234567... range will ever be assigned to a different PSTN
subscriber.


Philipp Kempgen
-- 
AMOOMA GmbH - Bachstr. 126 - 56566 Neuwied  ->  http://www.amooma.de
Geschäftsführer: Stefan Wintermeyer, Handelsregister: Neuwied B14998
Asterisk: http://the-asterisk-book.com - http://das-asterisk-buch.de
Videos of the AMOOCON VoIP conference 2009 ->  http://www.amoocon.de
-- 

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Re: [asterisk-users] Please some enlightment on ENUM !!

[Norbert Zawodsky]

Leif Neland schrieb:
> Norbert Zawodsky skrev:
>>
>>
>> Sorry N. !
>>
>> But - at least here in Austria - it is definitely *no* assumption that
>> my number with some extra digits can not be issued to someone else.
>>
>>   
> You probably have too many "no/not"s :-)
No! (Again, another "no" ;-) )

I meant, it is not an assumption, it is a fact. I read over my sentence
a few times, but I *think* the number of "no/not"s is correct. But who
knows? English isn't my native language...
>
>> The number +43-1-3207978 is my telephone number. I "own" it as long as I
>> pay for it. And with extra digits behind it I can do whatever I like. I
>> can create any extension - physical or virtual. I can attach a phone to
>> extension 12, attach a virtual fax server for extension 12 to extension
>> 99912 or could fire up my toaster if I call extension 911.  I can invent
>> any numbering scheme for my company. That's a fact!  Again - At least
>> here in Austria !! (can't speak for other countries)
>>
>>   
>
> Invent all you want, nobody can call those fantasy-numbers anyway.
> Perhaps, a fraction of a percent, who are using ENUM.
> Perhaps your voisp directs extra digits to you, but pstn-exchanges
> have a dialplan, starting to "dial" when the standard number of digits
> is entered.
Sorry, but again another "no"! Everybody can call those fantasy numbers.
>From any pstn, from any cellphone. I can go to any phone-booth (yes,
there are still a few around here!!) , insert a coin, call any of my
fantasy-numbers and get connected.

Here in Austria we have a "open numbering plan". Only restriction is
that the number of digits has to be <15 AFAIK.
Dialing starts either after the 15th digit entered or after some timeout
after entering the last digit. (Or with "modern" phones or cellphones:
first enter your number and then take the receiver off the hook)
>
>> And why would nic.at (the "owner" of our .at TLD) offer the possibility
>> to register a "e164 domain specific Nameserver" to answer
>> subdomain-requests for your number if it would violate ENUM standards? I
>> don't think that they're not knowing what they do
>>
>>   
> Don't rely on it. :-)
With that, I agree with you!


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Re: [asterisk-users] Please some enlightment on ENUM !!

[Leif Neland]

Norbert Zawodsky skrev:



What you're suggesting, though, violates the ENUM standard... and should
not be allowed.


N.
  


Sorry N. !

But - at least here in Austria - it is definitely *no* assumption that
my number with some extra digits can not be issued to someone else.

  

You probably have too many "no/not"s :-)


The number +43-1-3207978 is my telephone number. I "own" it as long as I
pay for it. And with extra digits behind it I can do whatever I like. I
can create any extension - physical or virtual. I can attach a phone to
extension 12, attach a virtual fax server for extension 12 to extension
99912 or could fire up my toaster if I call extension 911.  I can invent
any numbering scheme for my company. That's a fact!  Again - At least
here in Austria !! (can't speak for other countries)

  


Invent all you want, nobody can call those fantasy-numbers anyway. 
Perhaps, a fraction of a percent, who are using ENUM.
Perhaps your voisp directs extra digits to you, but pstn-exchanges have 
a dialplan, starting to "dial" when the standard number of digits is 
entered.



And why would nic.at (the "owner" of our .at TLD) offer the possibility
to register a "e164 domain specific Nameserver" to answer
subdomain-requests for your number if it would violate ENUM standards? I
don't think that they're not knowing what they do

  

Don't rely on it. :-)

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Re: [asterisk-users] Please some enlightment on ENUM !!

[Norbert Zawodsky]

SIP schrieb:
>   
>   
> ENUM is, quite literally, E164 Number Mapping (that's what it stands
> for).  If you're mapping numbers which are invalid E164 numbers (i.e. in
> your scenario in which you're taking an E164 number and attaching digits
> to it), you're violating the ENUM idea for the sake of convenience. 
> You're also making the somewhat unfounded assumption that there will
> never be an actual number issued (to someone else) with those extra
> digits.  Right NOW, there may be a convention that says that you can
> only have 10 digits in your country's phone numbers, but that could
> conceivably change at some future date, and then you'd be mapping
> numbers that belong to someone else to your own services.
>
> The only VALID way to assign ENUM numbers is to assign numbers you
> actually own. Not numbers you own with additional digits. Not numbers
> you own with extentions tacked on. Not numbers that are similar to ones
> you own. But ONLY ones you own. In this case, you own +4321234567, and
> only THAT number should be allowed to be registered as an ENUM number.
> Unless you, for instance, also own +4321234568 and +4321234569 or some
> such... at which time you would certainly be able to register those
> numbers and point them to your PBX.
>
> What you're suggesting, though, violates the ENUM standard... and should
> not be allowed.
>
>
> N.
>   
Sorry N. !

But - at least here in Austria - it is definitely *no* assumption that
my number with some extra digits can not be issued to someone else.

The number +43-1-3207978 is my telephone number. I "own" it as long as I
pay for it. And with extra digits behind it I can do whatever I like. I
can create any extension - physical or virtual. I can attach a phone to
extension 12, attach a virtual fax server for extension 12 to extension
99912 or could fire up my toaster if I call extension 911.  I can invent
any numbering scheme for my company. That's a fact!  Again - At least
here in Austria !! (can't speak for other countries)

And why would nic.at (the "owner" of our .at TLD) offer the possibility
to register a "e164 domain specific Nameserver" to answer
subdomain-requests for your number if it would violate ENUM standards? I
don't think that they're not knowing what they do

It *is* the same as with "normal domains". If you rent myhome.org you
can create any subdomain like razor.bathroom.myhome.org ;-)

And 7.6.5.4.3.2.1.3.4.e164.arpa is "my" domain (also literally! What
does the word "domain" mean?), and anything below that in the domain
tree is under my responsibility.

N. (too)


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Re: [asterisk-users] Please some enlightment on ENUM !!

[SIP]

Norbert Zawodsky wrote:
>> But then you create phonenumbers in enum, which doesn't exist as 
>> pstn-numbers.
>>
>> Not the idea behind enum.
>>
>> On the other hand, if you owned 10 or 100 pstn-numbers in series, you 
>> could get the last one or two digits delegated to your dns-server.
>>
>> Leif
>>
>>
>>
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>>http://lists.digium.com/mailman/listinfo/asterisk-users
>>
>>   
>> 
> Why do I create numbers in enum which doesn't exist as pstn ?
>
> A simple example:
>
> My "pstn number" is +43-1-1234567. Everybody around the world can call
> me using this number.
> Lets say, I have 3 extensions: 0=reception, 10=secretary, 20=boss.
>
> If someone calls
>
> ENUMLOOKUP(+4311234567) he will get a uri "sip:0...@ip.of.my.asterisk"
> ENUMLOOKUP(+43112345670) he will get a uri "sip:0...@ip.of.my.asterisk"
> ENUMLOOKUP(+431123456710) he will get a uri "sip:s...@ip.of.my.asterisk"
> or "sip:1...@ip.of.my.asterisk" (which ever you prefer)
> ENUMLOOKUP(+431123456720) he will get a uri "sip:b...@ip.of.my.asterisk"
> or "sip:2...@ip.of.my.asterisk"
>
> All this numbers exist because they connect to different persons. Why
> shouldn't that be the idea behind enum?
>
> Norbert
>
>   
ENUM is, quite literally, E164 Number Mapping (that's what it stands
for).  If you're mapping numbers which are invalid E164 numbers (i.e. in
your scenario in which you're taking an E164 number and attaching digits
to it), you're violating the ENUM idea for the sake of convenience. 
You're also making the somewhat unfounded assumption that there will
never be an actual number issued (to someone else) with those extra
digits.  Right NOW, there may be a convention that says that you can
only have 10 digits in your country's phone numbers, but that could
conceivably change at some future date, and then you'd be mapping
numbers that belong to someone else to your own services.

The only VALID way to assign ENUM numbers is to assign numbers you
actually own. Not numbers you own with additional digits. Not numbers
you own with extentions tacked on. Not numbers that are similar to ones
you own. But ONLY ones you own. In this case, you own +4321234567, and
only THAT number should be allowed to be registered as an ENUM number.
Unless you, for instance, also own +4321234568 and +4321234569 or some
such... at which time you would certainly be able to register those
numbers and point them to your PBX.

What you're suggesting, though, violates the ENUM standard... and should
not be allowed.


N.

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Re: [asterisk-users] Please some enlightment on ENUM !!

[Leif Neland]

  - Original Message - 
  From: Norbert Zawodsky 
  To: Asterisk Users Mailing List - Non-Commercial Discussion 
  Sent: Thursday, November 26, 2009 10:46 AM
  Subject: Re: [asterisk-users] Please some enlightment on ENUM !!


  Leif Neland schrieb:
  >
  > But if a pstn or cell call +431123456720 will it be connected to
  > +4311234567 ? Or will the call fail?
  > If so, +431123456720 is an invalid number.
  >  
  > Leif
  That depends on the Dialplan coding.
  A non-sip call comes in from the VoIP provider into the associated
  context. The provider ignores anyway if there is an extension specified,
  or not. He just routes any call to my "base" number to me and the
  dialplan decides how to handle nonexistent extensions...


Ymmw.
If I make a cell call with extra digits beyound the 8 digts to my asterisk, the 
extra digits are stripped off, I only see the official 8 digits in the sip 
dialog, not the extension.

To call in directly, I use 12345678p911 in my cell.

Leif


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Re: [asterisk-users] Please some enlightment on ENUM !!

[Leif Neland]

  - Original Message - 
  From: Norbert Zawodsky 
  To: Asterisk Users Mailing List - Non-Commercial Discussion 
  Sent: Thursday, November 26, 2009 10:46 AM
  Subject: Re: [asterisk-users] Please some enlightment on ENUM !!


  Leif Neland schrieb:
  >
  > But if a pstn or cell call +431123456720 will it be connected to
  > +4311234567 ? Or will the call fail?
  > If so, +431123456720 is an invalid number.
  >  
  > Leif
  That depends on the Dialplan coding.
  A non-sip call comes in from the VoIP provider into the associated
  context. The provider ignores anyway if there is an extension specified,
  or not. He just routes any call to my "base" number to me and the
  dialplan decides how to handle nonexistent extensions...


Ymmw.
If I make a cell call with extra digits beyound the 8 digts to my asterisk, the 
extra digits are stripped off, I only see the official 8 digits in the sip 
dialog, not the extension.

To call in directly, I use 12345678p911 in my cell.

Leif


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Re: [asterisk-users] Please some enlightment on ENUM !!

[Norbert Zawodsky]

Leif Neland schrieb:
>
> But if a pstn or cell call +431123456720 will it be connected to
> +4311234567 ? Or will the call fail?
> If so, +431123456720 is an invalid number.
>  
> Leif
That depends on the Dialplan coding.
A non-sip call comes in from the VoIP provider into the associated
context. The provider ignores anyway if there is an extension specified,
or not. He just routes any call to my "base" number to me and the
dialplan decides how to handle nonexistent extensions...

Norbert

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Re: [asterisk-users] Please some enlightment on ENUM !!

[Leif Neland]

>> But then you create phonenumbers in enum, which doesn't exist as 
>> pstn-numbers.
>>
>> Not the idea behind enum.
>>
>> On the other hand, if you owned 10 or 100 pstn-numbers in series, you 
>> could get the last one or two digits delegated to your dns-server.
>>
>Why do I create numbers in enum which doesn't exist as pstn ?
>
>A simple example:
>
>My "pstn number" is +43-1-1234567. Everybody around the world can call
>me using this number.
>Lets say, I have 3 extensions: 0=reception, 10=secretary, 20=boss.
>
>If someone calls

>ENUMLOOKUP(+4311234567) he will get a uri "sip:0...@ip.of.my.asterisk"
>ENUMLOOKUP(+43112345670) he will get a uri "sip:0...@ip.of.my.asterisk"
>ENUMLOOKUP(+431123456710) he will get a uri "sip:s...@ip.of.my.asterisk"
>or "sip:1...@ip.of.my.asterisk" (which ever you prefer)
>ENUMLOOKUP(+431123456720) he will get a uri "sip:b...@ip.of.my.asterisk"
>or "sip:2...@ip.of.my.asterisk"

>All this numbers exist because they connect to different persons. Why
>shouldn't that be the idea behind enum?

But if a pstn or cell call +431123456720 will it be connected to +4311234567 ? 
Or will the call fail?
If so, +431123456720 is an invalid number.

Leif
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Re: [asterisk-users] Please some enlightment on ENUM !!

[Norbert Zawodsky]

>
> But then you create phonenumbers in enum, which doesn't exist as 
> pstn-numbers.
>
> Not the idea behind enum.
>
> On the other hand, if you owned 10 or 100 pstn-numbers in series, you 
> could get the last one or two digits delegated to your dns-server.
>
> Leif
>
>
>
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> To UNSUBSCRIBE or update options visit:
>http://lists.digium.com/mailman/listinfo/asterisk-users
>
>   
Why do I create numbers in enum which doesn't exist as pstn ?

A simple example:

My "pstn number" is +43-1-1234567. Everybody around the world can call
me using this number.
Lets say, I have 3 extensions: 0=reception, 10=secretary, 20=boss.

If someone calls

ENUMLOOKUP(+4311234567) he will get a uri "sip:0...@ip.of.my.asterisk"
ENUMLOOKUP(+43112345670) he will get a uri "sip:0...@ip.of.my.asterisk"
ENUMLOOKUP(+431123456710) he will get a uri "sip:s...@ip.of.my.asterisk"
or "sip:1...@ip.of.my.asterisk" (which ever you prefer)
ENUMLOOKUP(+431123456720) he will get a uri "sip:b...@ip.of.my.asterisk"
or "sip:2...@ip.of.my.asterisk"

All this numbers exist because they connect to different persons. Why
shouldn't that be the idea behind enum?

Norbert

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Re: [asterisk-users] Please some enlightment on ENUM !!

[Leif Neland]

Norbert Zawodsky skrev:
> SIP schrieb:
>   
>>>   Yes... you would have to register (and possibly pay for, dependent on
>>> the ENUM registrar) each individual number. The idea behind ENUM is that
>>> it's an E164 number that is already yours that maps to whatever you want
>>> it to map to (email, SIP, etc).  The key point here is that you already
>>> own the E164 number. If you do, then you could register them all at
>>> e164.org for free.  If you don't own the individual numbers, you
>>> shouldn't be allowed to register them as your own. That sort of breaks
>>> the ENUM concept of a number you take with you as a personal identifier.
>>>
>>> N.
>>>
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>>>http://lists.digium.com/mailman/listinfo/asterisk-users
>>>
>>>
>>> 
>>>   
>
> Hi N. !
>
> Thanks for your answer.
>
> Either I don't understand what you want to tell me or this thread slowly
> drifts away from my original question.
>
> My original question was:
>
> If you "own" a telephone number which connects to your company and you
> have a PBX (like asterisk) and some extesniosn behind that, how/where do
> you enum-register each extension so that each extension can be reached
> "from outside" by a SIP uri?
>
> Meanwhile I managed to speak to a technician at my-enum.at, which is my
> registrar at e164.arpa. He *comfirmed* my original assumption:
>
> If you have a telephone number and want to paticipate in enum, you have
> to register that number at - for example - e164.arpa.
>
> If you operate extensions "behind" that number and you want them to be
> reachable too, you have to run your own DNS server and register this
> server at e164.arpa. This server is naturally under your responsibility
> and you "manage" all your extension yourself.
>
> It is works exactly like any other DNS resolution.
>   
But then you create phonenumbers in enum, which doesn't exist as 
pstn-numbers.

Not the idea behind enum.

On the other hand, if you owned 10 or 100 pstn-numbers in series, you 
could get the last one or two digits delegated to your dns-server.

Leif



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Re: [asterisk-users] Please some enlightment on ENUM !!

[Norbert Zawodsky]

SIP schrieb:
>>   Yes... you would have to register (and possibly pay for, dependent on
>> the ENUM registrar) each individual number. The idea behind ENUM is that
>> it's an E164 number that is already yours that maps to whatever you want
>> it to map to (email, SIP, etc).  The key point here is that you already
>> own the E164 number. If you do, then you could register them all at
>> e164.org for free.  If you don't own the individual numbers, you
>> shouldn't be allowed to register them as your own. That sort of breaks
>> the ENUM concept of a number you take with you as a personal identifier.
>>
>> N.
>>
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>>
>>
>> 

Hi N. !

Thanks for your answer.

Either I don't understand what you want to tell me or this thread slowly
drifts away from my original question.

My original question was:

If you "own" a telephone number which connects to your company and you
have a PBX (like asterisk) and some extesniosn behind that, how/where do
you enum-register each extension so that each extension can be reached
"from outside" by a SIP uri?

Meanwhile I managed to speak to a technician at my-enum.at, which is my
registrar at e164.arpa. He *comfirmed* my original assumption:

If you have a telephone number and want to paticipate in enum, you have
to register that number at - for example - e164.arpa.

If you operate extensions "behind" that number and you want them to be
reachable too, you have to run your own DNS server and register this
server at e164.arpa. This server is naturally under your responsibility
and you "manage" all your extension yourself.

It is works exactly like any other DNS resolution.

Norbert


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Re: [asterisk-users] Please some enlightment on ENUM !!

[SIP]

Norbert Zawodsky wrote:
> Leif Neland schrieb:
>   
>>  
>>
>> - Original Message -
>> *From:* Norbert Zawodsky 
>> *To:* Asterisk Users Mailing List - Non-Commercial Discussion
>> 
>> *Sent:* Monday, November 23, 2009 3:15 PM
>> *Subject:* [asterisk-users] Please some enlightment on ENUM !!
>>
>> Hello all you Gurus out there!
>>
>> Please could you explain something to me:
>>
>> Currently I try to get ENUMLOOKUP() working. Naturally I do all the
>> testing with my own number.
>>
>> I registered my number at e164.org
>> I paid for registration of my number at a registration agent for
>> e164.arpa
>> (I know, I don't need both. I just did the .arpa registration
>> first and
>> later discoverd the free .org service)
>> Assume my number was +4311234567
>>
>> "dig 7.6.5.4.3.2.1.1.3.4.e164.org" and "dig
>> 7.6.5.4.3.2.1.1.3.4.e164.arpa" both return NAPTR records.
>>
>> Now for the less clearer points:
>>
>> Your'e supposed to register your number without any extension.
>> If I have some extensions here, how can the calling party get the
>> correct sip uri to the requested extension?
>> Do I have to run my own DNS server in that case?
>>
>> If for example if someone wants to call extension 10, is the
>> ENUMLOOKUP(431123456710) request forwarded to my local DNS server
>> by the
>> e164.arpa server? Or how does that work?
>>
>> If everybody supported enum, it might be usefull to register extension
>> 10 in enum, otherwise:
>>  
>> Your extension 10 must have its own phonenumber, to be able to dial it
>> directly.
>> Just as with ordinary pabx.
>> Eg:
>> 123 555  is the reception
>> 123 555 0010 is extension 10
>>  
>> Just some ideas:
>> Is there "free" (as in not connected to a voisp) numbers, which can be
>> registered in enum?
>> Then you could use those numbers for extensions. But they would only
>> be callable by enum.
>>  
>> If the calling of extensions is only to be used by "knowledgeable
>> friends" you could have them add your own enum-domain to their setup.
>>  
>> Leif
>> 
> Hi Leif!
>
> No, I cannot believe that this was the right way. It would mean that I
> would have to register (& pay !!) for every single extension. BTW the
> How-To, the registration agent I'm using provides on his website,
> states, that if you're operating a PBX, you should only register your
> "main number" (=without any extensions).
>
> I *assume* that if I do an ENUMLOOKUP() of a number which includes some
> extension at the end, the DNS request is somehow delegated to that
> "sub-server" which is authorative over this sub-domain. This leads me to
> the next *assumption* that the "right" way would be to run an "own" DNS
> server which returns the sip-uri's for my extensions.
>
> Can someone confirm this?
>
> Norbert
>
>   

Yes... you would have to register (and possibly pay for, dependent on
the ENUM registrar) each individual number. The idea behind ENUM is that
it's an E164 number that is already yours that maps to whatever you want
it to map to (email, SIP, etc).  The key point here is that you already
own the E164 number. If you do, then you could register them all at
e164.org for free.  If you don't own the individual numbers, you
shouldn't be allowed to register them as your own. That sort of breaks
the ENUM concept of a number you take with you as a personal identifier.

N.

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Re: [asterisk-users] Please some enlightment on ENUM !!

[Leif Neland]

Norbert Zawodsky wrote:
> Leif Neland schrieb:
>   
>>  
>>
>> - Original Message -
>> *From:* Norbert Zawodsky 
>> *To:* Asterisk Users Mailing List - Non-Commercial Discussion
>> 
>> *Sent:* Monday, November 23, 2009 3:15 PM
>> *Subject:* [asterisk-users] Please some enlightment on ENUM !!
>>
>> Hello all you Gurus out there!
>>
>> Please could you explain something to me:
>>
>> Currently I try to get ENUMLOOKUP() working. Naturally I do all the
>> testing with my own number.
>>
>> I registered my number at e164.org
>> I paid for registration of my number at a registration agent for
>> e164.arpa
>> (I know, I don't need both. I just did the .arpa registration
>> first and
>> later discoverd the free .org service)
>> Assume my number was +4311234567
>>
>> "dig 7.6.5.4.3.2.1.1.3.4.e164.org" and "dig
>> 7.6.5.4.3.2.1.1.3.4.e164.arpa" both return NAPTR records.
>>
>> Now for the less clearer points:
>>
>> Your'e supposed to register your number without any extension.
>> If I have some extensions here, how can the calling party get the
>> correct sip uri to the requested extension?
>> Do I have to run my own DNS server in that case?
>>
>> If for example if someone wants to call extension 10, is the
>> ENUMLOOKUP(431123456710) request forwarded to my local DNS server
>> by the
>> e164.arpa server? Or how does that work?
>>
>> If everybody supported enum, it might be usefull to register extension
>> 10 in enum, otherwise:
>>  
>> Your extension 10 must have its own phonenumber, to be able to dial it
>> directly.
>> Just as with ordinary pabx.
>> Eg:
>> 123 555  is the reception
>> 123 555 0010 is extension 10
>>  
>> Just some ideas:
>> Is there "free" (as in not connected to a voisp) numbers, which can be
>> registered in enum?
>> Then you could use those numbers for extensions. But they would only
>> be callable by enum.
>>  
>> If the calling of extensions is only to be used by "knowledgeable
>> friends" you could have them add your own enum-domain to their setup.
>>  
>> Leif
>> 
> Hi Leif!
>
> No, I cannot believe that this was the right way. It would mean that I
> would have to register (& pay !!) for every single extension.

Just as you would have to pay for a bunch of PSTN-numbers if people 
should be able to call into the extensions via PSTN

As ENUM is implemented, it is a mapping of PSTN-numbers to routing.
There is not an option to further delegate numbers "below" a PSTN-number 
to extensions.
But people can dial into your Asterisk via ENUM, and then dial the 
extension at the voice prompt.

However, at e164.org, you can get a FREE164 number out of the +882 99 
number pool.
These numbers are for dialing Internet hosts only, they are not 'real' 
telephone numbers!

There you can get a series like 88299 008971 0 to 88299 008971  for 
your extensions.

Leif



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Re: [asterisk-users] Please some enlightment on ENUM !!

[Norbert Zawodsky]

Leif Neland schrieb:
>  
>
> - Original Message -
> *From:* Norbert Zawodsky 
> *To:* Asterisk Users Mailing List - Non-Commercial Discussion
> 
> *Sent:* Monday, November 23, 2009 3:15 PM
> *Subject:* [asterisk-users] Please some enlightment on ENUM !!
>
> Hello all you Gurus out there!
>
> Please could you explain something to me:
>
> Currently I try to get ENUMLOOKUP() working. Naturally I do all the
> testing with my own number.
>
> I registered my number at e164.org
> I paid for registration of my number at a registration agent for
> e164.arpa
> (I know, I don't need both. I just did the .arpa registration
> first and
> later discoverd the free .org service)
> Assume my number was +4311234567
>
> "dig 7.6.5.4.3.2.1.1.3.4.e164.org" and "dig
> 7.6.5.4.3.2.1.1.3.4.e164.arpa" both return NAPTR records.
>
> Now for the less clearer points:
>
> Your'e supposed to register your number without any extension.
> If I have some extensions here, how can the calling party get the
> correct sip uri to the requested extension?
> Do I have to run my own DNS server in that case?
>
> If for example if someone wants to call extension 10, is the
> ENUMLOOKUP(431123456710) request forwarded to my local DNS server
> by the
> e164.arpa server? Or how does that work?
>
> If everybody supported enum, it might be usefull to register extension
> 10 in enum, otherwise:
>  
> Your extension 10 must have its own phonenumber, to be able to dial it
> directly.
> Just as with ordinary pabx.
> Eg:
> 123 555  is the reception
> 123 555 0010 is extension 10
>  
> Just some ideas:
> Is there "free" (as in not connected to a voisp) numbers, which can be
> registered in enum?
> Then you could use those numbers for extensions. But they would only
> be callable by enum.
>  
> If the calling of extensions is only to be used by "knowledgeable
> friends" you could have them add your own enum-domain to their setup.
>  
> Leif
Hi Leif!

No, I cannot believe that this was the right way. It would mean that I
would have to register (& pay !!) for every single extension. BTW the
How-To, the registration agent I'm using provides on his website,
states, that if you're operating a PBX, you should only register your
"main number" (=without any extensions).

I *assume* that if I do an ENUMLOOKUP() of a number which includes some
extension at the end, the DNS request is somehow delegated to that
"sub-server" which is authorative over this sub-domain. This leads me to
the next *assumption* that the "right" way would be to run an "own" DNS
server which returns the sip-uri's for my extensions.

Can someone confirm this?

Norbert


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Re: [asterisk-users] Please some enlightment on ENUM !!

[Leif Neland]

  - Original Message - 
  From: Norbert Zawodsky 
  To: Asterisk Users Mailing List - Non-Commercial Discussion 
  Sent: Monday, November 23, 2009 3:15 PM
  Subject: [asterisk-users] Please some enlightment on ENUM !!


  Hello all you Gurus out there!

  Please could you explain something to me:

  Currently I try to get ENUMLOOKUP() working. Naturally I do all the
  testing with my own number.

  I registered my number at e164.org
  I paid for registration of my number at a registration agent for e164.arpa
  (I know, I don't need both. I just did the .arpa registration first and
  later discoverd the free .org service)
  Assume my number was +4311234567

  "dig 7.6.5.4.3.2.1.1.3.4.e164.org" and "dig
  7.6.5.4.3.2.1.1.3.4.e164.arpa" both return NAPTR records.

  Now for the less clearer points:

  Your'e supposed to register your number without any extension.
  If I have some extensions here, how can the calling party get the
  correct sip uri to the requested extension?
  Do I have to run my own DNS server in that case?

  If for example if someone wants to call extension 10, is the
  ENUMLOOKUP(431123456710) request forwarded to my local DNS server by the
  e164.arpa server? Or how does that work?


If everybody supported enum, it might be usefull to register extension 10 in 
enum, otherwise:

Your extension 10 must have its own phonenumber, to be able to dial it directly.
Just as with ordinary pabx.
Eg:
123 555  is the reception
123 555 0010 is extension 10

Just some ideas:
Is there "free" (as in not connected to a voisp) numbers, which can be 
registered in enum?
Then you could use those numbers for extensions. But they would only be 
callable by enum.

If the calling of extensions is only to be used by "knowledgeable friends" you 
could have them add your own enum-domain to their setup.

Leif


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