Dear firends, These new features announced by kamailio3.3: " Scalability support for handling GRUU and SIP Outbound dispatcher added outbound_proxy modparam for use with dispatcher pings usrloc handle reg-id Contact parameter defined by RFC5626 " But after I read the doc of dispatcher module, I can not find the PATH header and flow token process which is defined in RFC5626. Does kamailio3.3 still not support RFC5626? Best Regards Victor