Abstract: A circuit arrangement and a method for storing configuration data both use a first storage of a processor to store the configuration data. This configuration data for a device unit startup is not released before an identifier that characterizes the configuration data conforms with an identifier held in a second storage unit that is inseparably connected in an electrical manner to the rear panel of the device unit. The second storage unit is preferably fashioned from passive elements.

Abstract: An arrangement for storing the address of a processor unit that belongs to a device for on-line monitoring of a message transmission equipment is provided in which processor units are provided with respective storable addresses on the basis of an addressing procedure. In order to avoid a readdressing of all processor units upon a replacement of one processor unit, an E.sup.2 PROM in which the address of a processor unit can be stored is arranged outside of the processor unit in an insert that contains the processor unit.

Abstract: Method for inputting signals into and outputting signals out of subareas of the auxiliary signals of transport modules of a synchronous digital signal hierarchy.The invention is based on the object of specifying a method for outputting signals from at least one subarea of the auxiliary signals and for inputting signals into at least one subarea of the auxiliary signals of transport modules of a synchronous digital signal hierarchy according to the CCITT Draft Recommendations G.70X, G.70Y and G.70Z.This object is achieved during outputting in that a subarea of the auxiliary signals is output from the transport module (STM-4) in a demultiplexing and spreader means (1a) and is spread over a time span within the frame. The spread signal, for example, is resolved into the auxiliary signals (TB-STM-4) of the selected subarea that are allocated to the transport modules of the lowest hierarchy level contained in the transport module (STM-4).

Abstract: The invention relates to a circuit arrangement for supplying a DC voltage to be maintained constant to electric loads, at least one load being connected via a switching regulator to a supply loop fed with an impressed current. The circuit maintains its regulation even if the loads fluctuate greatly within a short time. Accordingly, the invention provides, that at the switching regulator the switching element is arranged parallel to the input; that between the switching element and a capacitor lying parallel to the output of the switching regulator a diode is arranged which is cut off when the switching element is conducting. The circuit arrangement can be used to advantage in power supply equipments of electric communications systems.

Abstract: In a circuit arrangement for feeding electrical users by DC series feed, remotely fed users are respectively preceded by a DC-DC converter which contains a switch controller having a switch element parallel to an input thereof and having a capacitor connected thereto via a diode. In such a circuit arrangement, it is desired that the voltage appearing at the input during the start-up operation should remain below a prescribed amount. For this purpose, the control circuit is designed such that it emits a pulse sequence having a fixed or limited pulse-duty factor during the start-up operation and/or such that at least one part of the load is disconnectable with the assistance of a switch means. The circuit arrangement can be advantageously employed in switch controllers which precede remotely fed users in communications transmission devices with DC series feed.

Abstract: In a circuit arrangement for feeding electrical users with a DC voltage, a constant-current fed switch controller is followed by a voltage converter. Given such a circuit arrangement, difficulties can arise when users are fed which, given a change of the input voltage, take a constant power, as is the case given voltage converters having a regulated output voltage. In order to make the circuit arrangement as insensitive as possible to overload conditions, the circuit arrangement is provided with a device for limiting the input power of the voltage converter. The circuit arrangement can be employed with particular advantage for feeding intermediate locations in communications transmission devices.

Abstract: In a circuit arrangement for feeding electrical users with a DC voltage, a control circuit of a first switch controller serves as a current/voltage converter supplied from an auxiliary voltage source. Given such circuit arrangements, the auxiliary voltages should be generated with the simplest possible means and should be available as quickly as possible upon turn-on. For this purpose, the auxiliary voltage source is formed by a second switch controller whose switch element is parallel to an input of the first switch controller to which a capacitor is connected via a diode. Furthermore, the first and second switch controllers are positioned in series with one another at the input. The circuit arrangement can be advantageously employed in intermediate stations of communication transmission devices having DC current series feed.

Abstract: For remote feed of a group of electrical users connected in series in a closed loop, a dc voltage is applied to the loop in a polarity opposite to a normal feed voltage in order to determine whether interruptions are present, even if a human body is shunting the loop at the interruption. Each of the users has a diode connected in parallel to its inputs which is polarized such that when the test voltage for creating a test current is applied, substantially only a resistance of the loop is measured exclusive of the users. A loop resistance is determined from a measurement of the test current and the loop resistance is compared to a test resistance set lower than a human body resistance. If the loop resistance is lower than the test resistance, then normal remote feed current is applied to the loop since no interruptions exist.