1. E.212 ENUMService Type Definition E.212 Parameters for the "tel" URI
Edward Lewis
NeuStar
IETF 68 ENUM WG meeting
19 March 2007

2. Back-to-Back Items draft-lewis-enum-enumservice-e212-00.txt
To register "E2U+E212" as enumservice
Indicates NAPTR has ITU E.212 infomation
draft-lewis-enum-teluri-e txt
To define parameters in tel: for E.212
19 March 2007

3. Plans for the two
Go over comments received so far, get more while here
Edit the documents in the coming week(s) post IETF68
Submit again as directed (WG or not)
19 March 2007

4. E.212 for IETF'ers
E.212 is an ITU document/standard defining meta-data for a mobile-phone telephone number
MCC (Mobile Country Code)
MNC (Mobile Network Code)
MSIN (Mobile Subscriber Identification #)
IMSI (International Mobile Subscriber Identity) - the concatenation of the other 3
19 March 2007

5. A diagram MCC MNC MSIN IMSI MCC - 3 digits MNC - 2 or 3 digits
MSIN - up to 10 digits
IMSI - up to 15 digits
19 March 2007

6. Why IETF documents? This is about ENUM
Wanting to store the ITU-defined parameters in ENUM
This isn't so much about E.212, 'cept that that is the "payload"
19 March 2007

7. draft-lewis-enum-enumservice-e txt
First, it's a -00 individual, happy to make it a WG document
Fills in an ENUM service "application"
E2U+E212 means the NAPTR RR has a tel: URI (with extensions in the other draft)
19 March 2007

8. Comments on that one Would like a good use case
Fair enough, the draft is minimal and am happy to add that. Still in the process of writing it.
Is it worth getting a non-SIP ENUM extension defined?
Suggestion to use an experimental (x-) but really want a "real" definition
19 March 2007

9. More comments What about "aux-info:e212"?
Although workable, a few reservations
We/WG don't have other "aux-info's" in mind, I don't like to generalize from a single case
E.212 is subjectively significant enough to stand on its own, and is reliant on an external (ITU) definition
Linking in other (unknown) types would likely slow this process
19 March 2007

10. First doc question to WG
Should this be adopted as WG item?
What is missing from the application and supporting document?
Sub-note: I couldn't find a reliable "how to" to follow when submitting these drafts, so I "undercut" the submission
draft-ietf-enum-enumservices-guide-03.txt
19 March 2007

11. draft-lewis-enum-teluri-e txt
This document defines parameters for the tel: URI to hold the E.212 data
In the spirit of RFC 4694, but for different data
Four parameters are defined, as per earlier slide (MCC, MNC, MSIN, IMSI)
19 March 2007

12. My goal
I am interested in retrieving the MCC and MNC for a telephone number via ENUM
The draft includes MSIN and IMSI parameters for completeness
19 March 2007

13. Comments This draft ought to go to IPTEL What's E.212?
No response to that yet from me
What's E.212?
Should this draft explain it or just refer to the ITU document (now freely available)?
When I prepared the draft, I went for not including an explanation but can be convinced otherwise
19 March 2007

14. More comments Need an illustrative use case The ABNF is wrong
Working on that, went for brevity in the -00
The ABNF is wrong
A few pointed this out, you are all right, I'll fix that
The URI is wrong
Sorry - sigh, I wrote the draft on an airplane and it shows ;) (Goes for the ABNF too.)
19 March 2007

15. Yet more comments MCC+MNC xor IMSI?
Should the syntax require either both MCC and MNC be present or the IMSI be present?
My response is - that's the probable use case, but does this have to be encoded in the syntax rules? I prefer to let the syntax be freer than the use
19 March 2007

16. And more comments...
Isn't it unwise to have the IMSI, MSIN, and maybe even the MCC and MNC in a public database?
I'd agree with that, but the drafts are just providing a means to put this in ENUM and not saying that the data would be public
Not all DNS servers are on public networks
19 March 2007

17. Second doc questions
Should this be an ENUM WG doc or go ask IPTEL WG to adopt this?
19 March 2007

18. Well, I'm out of slides
Discussion?
19 March 2007