[Serusers] Prefix to Domains vs ENUM

[Alessio Focardi]

Hello Alexander,

so, if I'm getting it right:

I have 2 possibilities now:

use "prefix to domain" rewriting

there is a ser module for doing that, but in my opinion it looks pretty lame
to keep up to date the association between prefix and phone numbers;
when you will have 2.000.000 sip domains who is going to save you ? :)

That's the reason why I was asking for a centralized prefix/domains translation table:

its seems obvious to me that if everybody is going to decide is own associations things are going to be very funny in a few.

use the "ENUM" method

That's something like a "dns of phone numbers/sip domains" that's also compatible
with the pstn numbering plan for better integration.

You resolve the "fake pstn" phone number to obtain a SIP address,
complete with domain.

The only problem could be that you dont have to remember SIP addresses
but very long phone numbers .... :)

Am I on the right way to undestand the matter ?

Beside this I'm wondering why Italy is out of this interesting ENUM trial
... no one was willing ? Maybe you have find  someone here ! :)




Monday, November 10, 2003, 5:05:08 PM, you wrote:

AM> On (10.11.03 16:42), Alessio Focardi wrote:
>> E.164 ?

AM> sorry for my ignorance, E.164 is the ITU-T recommendation for the format
AM> of phone numbers. So, an E.164 number is simply a phone number.

>> Will I need money to obtain a E.164 compliant prefix for my server ?

AM> If you're talking about ENUM entries:

AM> You would need to have phone numbers for your users plus a ENUM DNS
AM> infrastructure in your country. If you have already a phone number, you
AM> could give your users extensions behind that number.

AM> Unfortunately, there is no ENUM trial going on in Italy yet, so you
AM> won't be able to publish ENUM records for your users in the public DNS
AM> in that case, so other users would not be able to find your users via
AM> ENUM.

AM> But, you could still use ENUM for finding other ENUM users, a currently
AM> small, but rapidly growing community. You won't need to keep a "prefix
AM> to domain" list for all the other VoIP providers, and your users won't
AM> have to remember "which prefix to dial for which provider?"

AM> to see a rough sketch how it works, take a look at our presentation at

AM> http://enum.nic.at/documents/AETP/Presentations/Austria/0017-2003-07_ENUM-Demo_ietf57.ppt

AM> I'm happy to supply you with more detail in private mail, i consider
AM> that being already quite off topic on the SER users list. Feel free to
AM> contact me.

AM> cheers

AM> axelm



-- 
Best regards,
 Alessio                            mailto:alessiof at interconnessioni.it