Hi, I am testing an IMS registration scenario using a UE stack and an automated framework for the CORE IMS network. However, my question here is more SIP centric than IMS.
UE ------------------------------- N/W(Registrar) -------> Registration (UDP) ---------------- --> <------- 401 challenge (UDP) <------------ --------> Registration with response (UDP)--> <-------- 200 OK (TCP) <------------------------------ --------> Subscribe for reg event (UDP) --> <-------- 200 OK (TCP) <------------------------------ I have never seen it before, Is it possible to have both UDP and TCP communication happening simultaneously ? what are the consequences of such communication? I believe when a UAC sends request from a UDP port mentioning it the VIA and Contact header, it expects UAS response to arrive on the same UDP port, please correct me if I am wrong. On top of it, when UAC initiates a Transaction, the transport layer chooses UDP as the transport protocol, will that transaction be closed ever as the UE is not receiving a response on the UDP port? Thanks Arun _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
