Hi All,

I have a question regarding matching server transactions. I tried to
google for the problem but couldn't find the answer.

Section 17.2.3 says

"The request matches a transaction if:

      1. the branch parameter in the request is equal to the one in the
         top Via header field of the request that created the
         transaction, and

      2. the sent-by value in the top Via of the request is equal to the
         one in the request that created the transaction, and

      3. the method of the request matches the one that created the
         transaction, except for ACK, where the method of the request
         that created the transaction is INVITE.
"

My question is - if the top VIA header does not have a 'sent-by'
parameter, what happens to the transaction matching procedure? Is step 2
ignored in such a case?


TIA,
Anshuman





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