5 Jul
2005
5 Jul
'05
4:25 a.m.
The effective transferring is done using REFER messages but since there
are several transfer methods, some INVITEs can be triggered before (put
on-hold, contact the referee). So, depending on how the user has
configured the transfer in his/her phone (blind, attended,
unattended,are there more??) the SIP request that the phone sends when
the user presses the button is different.
Take a look at the draft specifying the different transfer methods for
a detailled view of the message flows
(draft-ietf-sipping-service-examples I don't remember the most recent
number....probably 7 or 8)
Samuel.
Unclassified.
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>> Iqbal <iqbal(a)gigo.co.uk> 07/05/05
03:57AM >>>
which is why I am wondering if on pressing a transfer button request on
a
phone, should the first message being sent be a REFER or a INVITE,
cause
refer would make sense, although I havent looked at the rfc,
If anyone has a IP phones transferring a ngrep of transfer would be
appreciated
Iqbal
On 7/4/2005, "Nils Ohlmeier" <lists(a)ohlmeier.org> wrote:
Hi,
take a look at the SDP of the INVITE. Probably it just puts the other
side
on-hold before sending the REFER.
But I have no real clue how transfering without REFER should work.
(Except a
cumbersome solution with Replaces and 3pcc, which I
have never.)
Nils
On Monday 04 July 2005 21:07, Iqbal wrote:
> Hi
>
> Should the call transfer use INVITE or REFER as a method, cause I
seem,
> to be getting INVITE, but this then causes
problems with
authentication.
>
> A <-->B then B transfer to C (all IP phones)
>
> This transfer seems fine, but it uses INVITE, no REFER . All phones
on
> same sip domain/server
>
> Now when this setup changes
>
> pstn <---->B and then B tried to transfer to C, we get nothing, well
we
get 404 , it
check the !location setting, and says ur not allowed.
Is the REFER the first message to be sent, or is there a INVITE
transaction first,
Iqbal
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