A Mobile Switching Center, MSC, an Access Transfer Control Function, ATCF, an Access Transfer Gateway, ATGW and respective methods therein are provided for performing a packet-switched, PS, to circuit-switched, CS, handover of a User Equipment, UE, are provided. When the UE is handed over from a PS communication network to a CS communication network, the MSC requests the ATCF controlling the ATGW to bi-casting to both the CS communication network and the PS communication network, and forwarding speech data from the UE to a remote terminal with which the UE is communicating during the PS to CS handover procedure. Once the UE is handed over, the bi-casting and the forwarding are terminated.