IMS S5-2f. SIP 486 Busy Here response: from P-CSCF1 to UE1, followed by ACK

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SIP ↠ Examples Grammars Presence ⇾ Main Services Transaction Dialog IMS

TS 24.228 – §7.2.3 – §7.3.5 – §7.4.5

IMS S5 signalling flow - Session Initiation: Mobile origination and termination in home network, but terminating UE roaming and busy - IMS S5-2f. SIP 486 Busy Here response: from P-CSCF1 to UE1, followed by ACK