See RFC 3398 section 7.3. > -----Original Message----- > From: [email protected] [mailto:sip- > [email protected]] On Behalf Of Md Faruk Apel > Chowdhury > Sent: Thursday, March 31, 2011 2:56 AM > To: [email protected] > Subject: [Sip-implementors] Does ISUP have any equivalent for ACK > message > > > > Call from SIP to PSTN > > > > SIP client-----------------MGC---------------------PSTN > > ----------INVITE----> ----------IAM-------------> > > ----------180---------------------------ACM---------------------- > > ----------200---------------------------ANM--------------- > > ----------->ACK -----------> ------What is in ISUP message for ACK > > Is there anything to send towards PSTN for ACK? > > > Appreciate for prompt response from anybody.
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