Abstract: A negative pressure installation for treating charged fluids, comprising at least one pipe (2) conveying said charged fluids, a tank (4) for holding the solid and liquid matter, a conduit (5) for evacuation of the gases from the tank (4) to a purifier (6) connected on the one hand to the exterior air by a tube (7) and on the other hand to the pipe (2) by a recycling pipe (10).Application in sanitary installations of aircraft.

Abstract: Where the ISDN subscriber terminal performs data transmission, the prefix transmitting section in the terminal transmits the prefix to a packet subsystem in advance. Based on this transmission, the modem pool apparatus designating section in the packet subsystem determines the corresponding modem pool apparatus to establish a communication path between the modem pool apparatus designating section and the modem pool apparatus. Further, the selected modem pool apparatus establishes a communication path to the start-stop transmission terminal. In accordance with the above sequence, a communication path of the ISDN subscriber terminal--packet subsystem--modem pool apparatus--the start-stop transmission terminal is established, thereby allowing the data communication between the ISDN subscriber terminal and start-stop transmission terminal to be realized.