----- Original Message -----
From: "Krishnaswamy, Pavitra" <[EMAIL PROTECTED]>

> Hi,
>
>  I have a question about To Tags in register messages.
>
> Does the UA need to maintain the To tag received in a Registration
> response(sent by the registrar) and include it in any subsequent
> registration refreshes?

No. The UA does not need to remember the To tag.

>
> Does it need to maintain the To tag received in a registration
response(200
> for Registration) for any reason?
>

No

> Also,  RFC 3261 states
>
> In section 10.2 :  "A REGISTER request does not establish a
> dialog." and
>
> In section 8.1.1.2 says "A request outside of a dialog MUST NOT
> contains a To tag".
>
> Do the above statements imply that a registration message (refresh/
> otherwise) should never carry a TO TAG.

Yes.


>
> Would really appreciate it if someone could please clarify.
>
> Thanks,
> pavitra
>
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