Siemens Aktiengesellschaft

Dietmar Weber

Martin Loczenski

Gerhard Ott

Max Barnicol-Ottler

Norbert Mieschke

Gerhard Przybylski

Bernhard Werres

Erich Puff

Wolfgang Hubig

A program-controlled communication installation is composed of at least a digital computer system having a computer core (processor) administered by a multi-tasking operating system and having a system memory wherein a plurality of program modules are stored. Each of the program modules serves the purpose of realizing a defined function of the communication installation. A function can only be executed in that the appertaining program module is handled by the computer core. Since a plurality of functions usually pend for execution, the executable program modules are noted in a process list from which the operating system respectively selects the program module having the highest priority and allocates it to the computer core for execution. In order to prevent a long duration displacement of program modules having lower priority, the program modules are combined into groups as program module function classes, each of which is respectively successively interpreted as being current for a certain chronological duration in periodic succession, whereby the operating system only takes those program modules that belong to the respectively current program module function class into consideration in the selection from the process list.

Program-controlled communication installation

A modularly-structured integrated services digital network (ISDN) communication system comprises a system processor that should be available for a real-time operating system and for a timesharing operating system. In order to enable continuous transitions of the system processor from one operating system into the other operating system, the task having the lowest priority (idle task) and a program subsystem having comparatively high priority in the real-time operating system (multitasking operating system) are fashioned as branch subsystems in which an assignment change from the addressing tables of the real-time operating system onto that of the timesharing operating system occur. The program subsystem with comparatively high priority which is fashioned as a branch subsystem assures that a certain minimum portion of the calculating capacity of the system processor is assigned to the timesharing operating system independently of the traffic load of the real-time operating system.

Modularly structured integrated services digital network (ISDN)

To improve the mechanical strength of a rubber hose cable, support elements are arranged between the conductors and the support elements are connected to a high tensile strength wrapping applied with a lay opposite the twisted conductors with adhesion or by cementing.

Flexible multiconductor electric cable

In order to improve the mechanical strength of power and control cables which are subjected to high mechanical stresses in operation, the conductors are elastically fixed to a structural element of the cable. To this end, the conductor insulation is joined in a material-bonded manner to the structural element which consists of a soft elastomer. The conductors are provided, for instance, with a thin cover layer of polyethylene which can be cross-linked peroxidically and is cross-linked after the inner jacket is applied, and in the process makes a material-bonded connection to the inner jacket which consists of a vulcanizable mixture of ethylene-propylene rubber and natural rubber.

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Munich, Germany

Dietmar Weber