Hi,
I have a question regarding UPDATE and reINVITE.

A                                      B

INVITE (C1)
|-------------------------------------->| // C = Contact
180
|<--------------------------------------|
200 OK (INVITE)
|<--------------------------------------|
ACK
|-------------------------------------->|
target
reINVITE (C2)
|-------------------------------------->|
1xx
|<--------------------------------------|
UPDATE (C3)
|-------------------------------------->|
200 OK (UPDATE)
|<--------------------------------------|
200 OK (reINVITE)
|<--------------------------------------|
ACK
|-------------------------------------->|


Q: Is it OK for UPDATE to be sent when reINVITE isn't actually
responded with the final response? And what will be the dialog remote
target C2 or C3? According to RFC3311, I presume that 200 OK to
reINVITE should have the same Contact as UPDATE or its response.



Best Regards
Sonja

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