On Mon, 16 Aug 2010, Tech Micron wrote:
> Hi Anthony,
>
> According to RFC3261 and RFC 2543, Double quote "" is not
> mandatory. But I have seen it in some debug traces from
> other SoftPhones.
>
> Ref: Section 20.39 of RFC 3261
I am no RFC lawyer, but inter alia, that out refers to RFC