RG UP CP |Offline Request | | 1|--------------->| | | | Relay the Offline | | | Request | | 2|------to CP via Si----->| | | | | | Send the Offline | | | Response | | 3|<-----to UP via Si------| |Offline Response| | 4|<---------------| | | | Session Delete | | | Request | | |<--------via Ci---------| | | Session Delete | | | Response | | |---------via Ci-------->| | | |