Abstract: A method for preventing circular routing in a telecommunications network, particularly in a common channel signaling network, in which the availability of a particular route is notified by sending particular management message from a node to another. In this case, a node acting as a signal transfer point, sends to its adjacent nodes particular transfer-prohibited messages notifying the adjacent nodes that they must no longer route messages destined to the nodes mentioned in the transfer-prohibited messages via the node that send the transfer-prohibited messages.

Abstract: A method for rerouting a packet-mode data connection, especially a frame relay network data connection, in which, traffic transmitted between two nodes is transferred from a first route to be disabled to a second, new route. In a rerouting situation, data packets to be transmitted to a new route are buffered, when needed, in a transmitter in order to perform checking concerning the route or to ensure the correct order of the data packets. In order to accomplish rerouting as fast as possible and with a minimum loss of data, the opposite end is notified of the need for buffering by sending a message, the contents of which depend on the rerouting situation in question.