Alex Balashov wrote:
> I cannot easily tell from 3261 whether references to URIs other than the
> Request URI must be encased in "<" and ">" or not, probably because I do
> not know how to read BNF.
If you are involved in SIP, or almost any IETF protocol, then I strongly
suggest that you *learn* to read ABNF. RFC 5234 should tell you all you
need to know.
Thanks,
Paul
> In other words, in the absence of a display name (which would be a
> quoted string), is this valid?
>
> Contact: sip:xx.xxx.xx.xxx:5060
>
> What about this?
>
> To: sip:xx.xxx.xxx.xxx:5060
>
> I was under the impression it was not, but this is mainly because I've
> never seen any implementation NOT use that notation regardless of
> whether it is necessary. I do not know if the rules here are more or
> less strict than RFC 2822.
>
> Thanks!
>
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