Yes, indeed a Re-INVITE can be initiated in both directions by the transferor.
For e.g.:
A=transferor, B=transferee, C=transfer target
C A B
----------> (Re-INVITE with no SDP)
<---------- (200 OK with SDP_b)
<-------- (Re-INVITE with SDP_b)
---------> (200 OK with SDP_c)
-----------> (ACK with SDP_c)
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Johan DE
CLERCQ
Sent: Tuesday, August 05, 2014 1:33 PM
To: Sourav Dhar Chaudhuri; [email protected]
Subject: Re: [Sip-implementors] Call transfer for an attended call without
usingREFER method possible? - Email found in subject
you can do that by issuing a reinvite in the dialogue.
Johan.
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Sourav
Dhar Chaudhuri
Sent: maandag 4 augustus 2014 16:12
To: [email protected]
Subject: [Sip-implementors] Call transfer for an attended call without
usingREFER method possible? - Email found in subject
Hi,
Is there any way when a answered call [ 200OK is already provided for
initial INVITE and ACK also sent] can be transferred without using REFER method?
If it is possible without REFER then please let me know required procedure.
Thanks,
Sourav Dhar Chaudhuri
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