> The term b2bua has a rather narrow definition in Section 6 of rfc3261. > It refers to a UAS concatenated with a UAC for incoming requests into > the UAS. Would it be incorrect to use the term b2bua to refer to a > UAC-UAC concatenation? >
As I understand it, a softphone is typically both a UAC AND a UAS. This is because the softphone can both initiate calls and receive calls. A b2bua is also both a UAC and a UAS, but it will only initiate a call (i.e. act as a UAC) if it has received a call (on the UAS). It then maintains two seperate calls simultaneously, and pipes the streaming media between them. In this context it should be clear that a UAC-UAC concatenation wouldn't work as a b2bua, because it would have no way of receiving calls. Alex _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
