Hello, my question regards authentication dialog during redirected call. (sorry, if it was already discussed, I didn't find something about this scenario) Let's say there are two servers AA and BB. AA is registered and client sends to it INVITE. Now AA redirects the call to BB. Question 1. Should BB also be registered as separate target with own credentials? Or maybe it depends on Client? Generaly I don't see why it should be - New target address is found by AA, Client sends Invite so it doesn't ask about authentication on this stage. Now Client sends INVITE to BB. Neither AA no BB ask authentication and BB receives INVITE. Call is established. After P&C dialog BB sends REFER to Client. Here Client answers with 407. Question 2. What credentials should be used by BB? Can it be AA credentials? Thank you Masha Dorfman
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