This credit control gateway is call-statefull, you have to implement it into a B2BUA. Normally proxy is not call-statefull.
kaiduan --- "Su, Jie (Emily)" <[EMAIL PROTECTED]> wrote: > Hi, > I have some questions about SIP, could you help me? > > Can a credit control gateway be implemented as a SIP > proxy, not a B2BUA? > The credit control gateway need to terminate SIP > session if low balance mid > session. > If balance enough, the gateway will not impact the > SIP session, but only > keep tracking the session status. > Is a SIP stateful proxy enough for the function of > this gateway? > > > IMS Gateway in 3GPP frame is a credit control > gateway between SIP session > controller (S-CSCF) and the charging system. > Only when there is enough balance, a SIP session can > be establishment. > When get a SIP[INVITE], the S-CSCF will send INVITE > to IMS gate to check > balance. > If there is enough balance, the S-CSCF can continue > to send the INVITE to > the called party. > In this case, if the IMS gateway is a SIP proxy, > can IMS gateway send the > original INVITE back to S-CSCF, (maybe with > record-route updated)? Is it > comply with SIP spec? > According to SIP spec, how do the S-CSCF know what > to do when getting the > INVITE from IMS gateway? or say, how do the S-CSCF > know this INVITE means > continue to next hop of SIP signaling? > > Thanks a lot > > Su, Jie (Emily) > Tel: 86-10-68748088-8073 (office) > Fax: 86-10-68748226 > > > > _______________________________________________ > Sip-implementors mailing list > [email protected] > http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > ______________________________________________________________________ Post your free ad now! http://personals.yahoo.ca _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
