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S4 // PSHO // VoLTE

in LteWorld Forum

Hi,
Is it required to have a S4 Interface with the feature PSHO to make VoLTE call?
Thx

Assuming you do not intend to

Assuming you do not intend to use CS bearer after HO towards 3G network, then for VoLTE call PS bearer will be used. 3GPPi offers two options S4 or S12, choose one.