Method for controlling a telecommunication network that comprises a core network with at least two core network nodes (MSC1; MSC2), a radio access network with at least two radio access network nodes (RNC1; RNC2), and an interface for connecting the core network and the radio access network, - wherein the core network node (MSC1; MSC2) is a mobile services switching centre, and - wherein a core network node is connectable to at least two radio access network nodes of the radio access network via the interface and a radio access network node is connectable to at least two core network nodes of the core network via the interface, and - wherein a message is sent from a core network node to a radio access network node over the interface, the message comprising an identification of the sending core network node, - wherein the identification is unique within the telecommunication network, identifying the core network node on the level of the Radio Access Network Application Part, RANAP, protocol, and - wherein the message is indicating that the radio access network node is selected as radio access network node that is in charge of a connection between a terminal and the radio access network, - wherein the message comprises an identification of a connection for the terminal between the core network and the radio access network over the interface, wherein the identification of the connection is an Iu connection identifier, and - wherein the radio access network node stores the identification of the core network node and the identification of the connection for the terminal between the core network and the radio access network over the interface, - wherein a further message (M1; M7) is sent from the core network node to the radio access network node over the interface, and - wherein the further message is indicating that in the sending core network node a failure has occurred that resulted in a loss of transaction reference information, - the further message comprising the identification of the core network node, and - wherein the radio access network node analyses the identification of the core network node and releases the connection for the terminal between the core network and the radio access network over the interface. - wherein the core network node (MSC1; MSC2) is a mobile services switching centre, and - wherein a core network node is connectable to at least two radio access network nodes of the radio access network via the interface and a radio access network node is connectable to at least two core network nodes of the core network via the interface, and - wherein a message is sent from a core network node to a radio access network node over the interface, the message comprising an identification of the sending core network node, - wherein the identification is unique within the telecommunication network, identifying the core network node on the level of the Radio Access Network Application Part, RANAP, protocol, and - wherein the message is indicating that the radio access network node is selected as radio access network node that is in charge of a connection between a terminal and the radio access network, - wherein the message comprises an identification of a connection for the terminal between the core network and the radio access network over the interface, wherein the identification of the connection is an Iu connection identifier, and - wherein the identification is unique within the telecommunication network, identifying the core network node on the level of the Radio Access Network Application Part, RANAP, protocol, and - wherein the message is indicating that the radio access network node is selected as radio access network node that is in charge of a connection between a terminal and the radio access network, - wherein the message comprises an identification of a connection for the terminal between the core network and the radio access network over the interface, wherein the identification of the connection is an Iu connection identifier, and - wherein the radio access network node stores the identification of the core network node and the identification of the connection for the terminal between the core network and the radio access network over the interface, - wherein a further message (M1; M7) is sent from the core network node to the radio access network node over the interface, and - wherein the further message is indicating that in the sending core network node a failure has occurred that resulted in a loss of transaction reference information, - the further message comprising the identification of the core network node, and - wherein the radio access network node analyses the identification of the core network node and releases the connection for the terminal between the core network and the radio access network over the interface. - wherein the further message is indicating that in the sending core network node a failure has occurred that resulted in a loss of transaction reference information, - the further message comprising the identification of the core network node, and - wherein the radio access network node analyses the identification of the core network node and releases the connection for the terminal between the core network and the radio access network over the interface.