1. Regarding Proxy behaviour, on Pg. 36 of the draft-ietf-sip-rfc2543bis-02, it says
"Proxies MUST NOT alter any fields that are authenticated (see Section 13.2), but MAY
add copies of fields that were authenticated by the UA if indicated in the table.".
Can someone explain the "add copies of fields" part?
3. Regarding Tag. Can multiple instances of a user (with same SIP URL) be present on
the same end-point (host), each instance having different session capabilities? These
instances could be differentiated using tag. However, registration would be only done
once.
Thanks in advance,
Deepak
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