4. Volte call flow – SIP Call Flow – IMS Call procedure
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VoLTE MO and MT Call Flow :- Covering VoLTE to VoLTE SIP IMS Call flow for Mobile Originating & Mobile Terminating Calls . It Provides extract of 3GPP / GSMA Specs simplified way
Volte call flow
Originating Call Flow Sequence described in Video
SIP INVITE message : UE –to– IMS
SIP 100 Trying : IMS –to– UE
SIP 183 Progress SDP : IMS –to– UE
SIP PRACK : UE –to– IMS
SIP 200 OK PRACK : IMS –to– UE
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SIP UPDATE SDP : UE –to– IMS
SIP 200 OK UPDATE : IMS –to– UE
SIP 180 Ringing : IMS –to– UE
SIP 200 OK INVITE : IMS –to– UE
SIP ACK : UE –to– IMS
5. SRVCC (Single Radio Voice Call Continuity) in VoLTE & Comparison with CSFB
Thank you Vikas Shokeen
https://www.telecomtutorial.info
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