[SIPForum-techwg] Interoperability Draft v3 - a few more comments

[Horvath, Ernst]

Chris,

[snip]
>> 4) Nits
>> - 11.1.1, last example (under 2.b.): Remove ";user=phone" on the
From:
>> line.
>> - 11.1.2, last example (under 3.b.): Remove ";user=phone" on the
From:
>> and P-Preferred-Identity: lines.
>
>I'm not clear on the reason(s) this should be removed?

These examples violate RFC 3261 rules.
"user=phone" can only be used to indicate that the user part of the SIP
URI represents a phone number, i.e. is equivalent to a tel: URI. This is
not the case in the examples listed above (even if
"sales at acmerockets.com" is interpreted as extension "72537" at
acmerockets.com's telephone network "sales" is not a valid tel: URI
format).

Regards,
Ernst