I think Polycom phones do. They support directed and group call-pickup which, if i'm not mistaken, uses out-of-dialog REFER.
--
Zahid
On Jun 8, 2010, at 5:37 PM, Iñaki Baz Castillo wrote:
> 2010/6/7 Klaus Darilion
klaus.mailinglists@pernau.at:
>> Hi!
>>
>> Does somebody know any SIP clients (hard/soft) which support out-of-dialog
>> REFERs?
>
> AFAIK no one implements such useful feature :(
>
> --
> Iñaki Baz Castillo
>
ibc@aliax.net
>
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