cs the communication with scc as may be done as a standalone transaction the msc server 300 may send a sip subscribe request to the scc as e g for dialog event package and the scc as responds with sip notify with the body which indicates whether the active session i e the session to be transferred in case of vsrvcc is voice or video alternatively the communication may be embedded to the domain transfer sip invite transaction the msc server 300 prepares the sdp offer for voice and sends an invite to the scc as the scc as updates the remote leg and returns an indication to the msc server 300 whether the scc as selected a voice or video session as a target for srvcc this indication may be returned e g in the body of sip info request msc server 300 then sends the prepare ho request to the target msc and tries to reserve either the bs30 or ts11 bearer from the target ran depending on the indication returned from the scc as with both alternatives after the srvcc completion since the ue 100 implements the same session selection logic than scc as the ue 100 is able to determine whether the session which was transferred was voice or video and.