FIELD: radio equipment and communications.
SUBSTANCE: invention relates to the mobile communication. Method includes the steps of: sending INVITE from the user equipment UE#1 to the P-CSCF/VATF (call session proxy function/access network guest access function) in the UE#1 guest network; sending INVITE (invitation) from the P-CSCF/VATF to the IMS (IP-based multimedia subsystem) and allocating, via the P-CSCF/VATF, MGW#1 (media gateway) channel for voice communication.
EFFECT: technical result consists in preventing the waste of MGW#1 resource.
6 cl, 7 dwg
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