[Serusers] Problem with ACK on Negative Reply

[PHAN, Quang-Minh (Docteur Ordinateur)]

Hi all,

    When I use SER in transaction stateful mode, I have the following
problem:

    When A sends an "INVITE B" to SER, SER forwards the INVITE to B
statefully. If B reply with "200 OK", everything goes fine as SER will
delete the transaction from memory when it sees the 200 OK. However, if B
send an "BUSY HERE" back to SER, SER will send an ACK to B right away and
then forwards the "BUSY HERE" to A. A will then send an ACK to SER but SER
won't realize that the ACK belong to the transaction and forward it to B.
SER will then keep sending "BUSY HERE" to A until the transaction is timed
out.

     I wonder if there is something to add in the configuration file to make
SER understand that the ACK send from A should terminate the transaction.

Any help will be highly appreciated!

Minh
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