[EMAIL PROTECTED] wrote:
>>I believe that the core of our misunderstanding is that the
>>last sentence is, as an issue of fact, incorrect.
>>
>>That two SIP phones -- really, three SIP phones -- can do a
>>transfer is because (1) the executing (instigating) phone
>>knows how to carry out the sequence of SIP operations needed
>>to perform a transfer, and (2) the other two phones correctly
>>implement certain SIP standards (primitives), the ones that
>>the executing phone uses to carry out the transfer.
>>
>>The non-executing phones do *not* need to know that what is
>>happening is a transfer, and they do *not* need to know how
>>to carry out a transfer themselves.
>
> If the other two phones do not know that what is happening is a
> transfer, what would they tell the user?
> They should be informing that "the call is being transferred" rather
> than saying "handling incoming Refer" or "got an Invite that seems to
> have resulted from a Refer"..
Does the phone have to say what is happening? In the general case you
cannot know this. Requiring that would limit future flexibility. If you
want to say something, you say something vague related to what you know
you have been asked to do ("reconnecting to ABC").
Paul
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