Re: [stir] stir-06: Reality check on numbers (6.1.1)

[Paul Kyzivat <[e-mail]>]

On 12/10/15 9:15 PM, Eric Burger wrote:
> Section 6.1.1 on Canonicalization states:
>        Once an implementation has identified a telephone number, it must
>        construct a number string.  Implementations MUST drop any leading
>        +'s, any internal dashes, parentheses or other non-numeric
>        characters, excepting only the leading "#" or "*" keys used in
>        some special service numbers (typically, these will appear only in
>        the To header field value).  This MUST result in an ASCII string
>        limited to "#", "*" and digits without whitespace or visual
>        separators.
>
> Survey time: does pound or star  EVER appear in a From field? E.164 does not allow it.

pound isn't allowed at all in a sip uri, except via escaping.

There is no mention of escaping (or unescaping) in the text. If there is 
the possibility of pound coming through then that is needed.

Also, * and # (as well as A-D) are never valid in global numbers, but 
are valid within local numbers not just first, but anywhere in the 
number. So why is there special treatment for a *leading* star or pound?

ISTM that canonicalization of dialstrings that represent local rather 
than global numbers is fraught with difficulty.

	Thanks,
	Paul