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Re: IMS, IM-SSF

2005-04-12 10:31:09
Questions on IMS should probably be directed towards 3gpp mailers, since that it is where it is being standardized. For SIP questions, you should direct your queries to sip-implementors(_at_)cs(_dot_)columbia(_dot_)edu, which is where general implementation help and Q&A takes place. For issues related to sip protocol design, please direct those to the sip list here at IETF, sip(_at_)ietf(_dot_)org(_dot_)

To answer your question, I think you are perhaps talking about a call transfer. That is accomplished by sending a REFER request from the caller to the called party to transfer them.

-Jonathan R.

Nuno Novo wrote:

In the IMS network when the Called party, after speaking with the Caller for a while, sends a BYE request there is a possibility for reconnecting the Caller to another called party (reconnect). The Caller is putted in a state of standby but is not disconnected.

Caller ------------------------à Called party 1--------------------------à Called party 2

The question is the following, when the second called party is contacted we need to connect the Caller to this new Called party, so how this is made? Is the Caller informed of the address of the new called party by a SIP UPDATE? Or this process is made in the MRCP that judges this call as a conference call?

Regards,
                      Nuno Novo


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--
Jonathan D. Rosenberg, Ph.D.                   600 Lanidex Plaza
Director, Service Provider VoIP Architecture   Parsippany, NJ 07054-2711
Cisco Systems
jdrosen(_at_)cisco(_dot_)com                              FAX:   (973) 952-5050
http://www.jdrosen.net                         PHONE: (973) 952-5000
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