FIELD: radio engineering and communications.
SUBSTANCE: server of mobile communication switching centre receives notification that terminal call requires service transfer from access network with channel switching (CS) to access network with packet switching (PS). MSC server determines whether terminal is currently registered in IMS network (IP multimedia subsystem) and/or whether MSC server is registered so that call service handover from CS network to PS network can be carried out. If result is positive, reverse continuous single radio voice call is called for handover from CS network to PS network. If result is negative, MSC server calls procedures of error processing.
EFFECT: facilitating call service handover from CS network to PS network.
8 cl, 8 dwg
