Hi, RFC 3261 does not mandate it. However there are some network architectures based on SIP that use this mechanism.
In IMS for instance, all calls shall be terminated when the registration ends (due to expiration or another reason). Regards, Thomas Brett Tate wrote: >>If a client registers with a SIP server some expire >>value. It will not refresh the expires value of registration. >> >>In the middle of the session if the value expires , will >>there be any effect to session..???? is the session get >>terminated..???? >> >> > >I'm not aware of an RFC which requires a valid registration for an >established call to continue. However some vendors might require a valid >registered contact to exist throughout the call for security or service >reasons. > > >_______________________________________________ >Sip-implementors mailing list >[email protected] >https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > > > > _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
