5G voice support in the VoX core
5G Opt. 2
5G
VoNR
5G Opt. 2
with EPS fallback
5G Opt. 3x
4G / LTE
UE
gNB
5GCN
UE
gNB
5GCN
UE
eNB
EPC
IMS
IMS
Voice
gNB
with voice over4G
SIP
UE
eNB
4G
VoLTE
Data
EPC
IMS
IMS bearer
(eg. Voice)
LTE control
LTE data
4G / LTE
5G control
UE
© 2020 Nokia
Document code: SR2003042394EN (March) CID207280
eNB
EPC
IMS
5G data