a signaling method for use in a communication network , in particular a unified network , for supporting a communication along a communication path via a plurality of in - path network infrastructure elements of the network . a service element of the network which is located off the communication path triggers an in - path network infrastructure element and the triggered in - path network infrastructure element initiates in - path signaling along the communication path . in particular , the service element may send a message to a terminating end point of the communication , which message is intercepted by the network infrastructure element closest to the terminating end point , which closest network infrastructure element initiates the in - path signaling .