FIELD: radio engineering, communication.
SUBSTANCE: apparatus includes means of transmitting a connection initialisation request message to a communication connection terminating node for initialising a communication connection in a first communication domain, and means of receiving a response to the connection initialisation request message. The response indicates a rejection of a media flow type of the communication connection in the first communication domain and includes a predetermined indication portion, means of processing the received response. Said processing means are further configured to check whether a predetermined condition set is met, and, if the predetermined condition set is met, to cause a transmission of another connection initialisation request message to the communication connection terminating node for initialising a communication connection in a second communication domain with the rejected media flow type of the communication connection.
EFFECT: optimising the session initialisation procedure with a terminating node.
38 cl, 6 dwg
