Abstract: The invention relates to a filter arrangement for separating analog or digital baseband signals, for example, POTS or ISDN signals and digital wideband signals, which are simultaneously transmitted on a two-wire line of a message transmission system. In accordance with an exemplary embodiment of the invention, the filter arrangement has a bi-directional low-pass filter (4) and a bi-directional high-pass filter (3). The low-pass filter (4) includes a first filter (6) with a first passband. The first filter (6) permits flow-through of direct current. A second filter (7) with a second passband is preferably arranged assembled by connecting the inputs and outputs of the first and second filters (6, 7) in parallel.

Abstract: Described is a method of compressing an analogue signal, e.g. a voice signal, the signal function being continuously sampled, quantized and encoded into data words, the difference between each two successive data words determined and each difference value quantized and encoded.

Abstract: Remote supply circuitry for remotely supplying a subscriber connections in a communications system wherein subscribers can be connected to a central point via subscriber lines. Subscriber supply voltage or power supply is provided for each subscriber via a supply voltage source assigned to the subscriber and at least one supply isolating element wich is connected in series with the subscriber and associated subscriber line. The supply voltage source assigned to the subscriber supplies an output voltage which is controllable as a function of a measurable variable.