An event that occurs during the course of a call. A system failure that occurs during a call which leads to a call drop and the communication and interpretation process may not continue. This failure can be analysed and resolved later.
Torres, Álvaro. Telecomunicaciones y telemática. De las señales de humo a las redes de información y a las actividades por internet. Tercera edición:2007, Colombia, Colección Telecomunicaciones.