Siemens Aktiengesellschaft

Gerhard Prey

Josef Birlmeier

Rolf Grabenhorst

Wolfgang Berner

Peter Kueffer

A circuit arrangement that controls the increase in voltage output of an operating voltage source such that a voltage dip during connection (or reconnection after repair) of a pluggable unit remains higher than the minimum allowable value and controls the decrease in voltage output to a normal operating voltage after a predetermined time interval. The increase can occur manually by a switch or automatically thru the use of sensors.

Circuit arrangement for supplying an operating voltage from an operating

After connecting a device to the switching device through device-specific connect command and transmission of a start command as well as transmission back of a start command acknowledgement signal, the connect command is partially or slightly changed and transmitted again, whereupon the switching device transmits a stop command to the particular device. The stop command is responded to by the particular device with a stop command acknowledgement signal transmitted back only, if after established connection it has received a start command before a stop command. The activation error is recognized in that after output of the changed connect command and the stop command transmitted thereupon each time, a stop command acknowledgement signal arrives in the switching device.

Telephone switch center with control of individual devices

In a circuit arrangement for PCM telecommunication facilities, especially PCM long distance exchange facilities with several synchronous pulse clock controlled transmitters for common transmitting chanel, information from different transmission processes flows over a transmitting channel common to all transmitters. In addition to the transmitting channel, a test channel is provided. For the prevention of simultaneous transmission and a co-mingling together of information, each transmitter transmits its own binary coded address to the transmitting channel always before a message as well as to the test channel and receives back the total information after combining on the test channel for comparison, bit-by-bit with the actual address information transmitted by it. In the event of accidental simultaneous transmission start by a transmitter, in case of character inequality on the test channel between two simultaneously transmitted bits, the binary character of the one type always asserts itself against the binary character of the other type. A transmitter interrupts its transmission in the event of character inequality. The assertion principle is limited to test channels while the transmission of both types of binary characters to the transmitting channel is relatively low ohmicly.

Circuit arrangement for PCM telecommunication facilities

A method and apparatus for controlling the instruction sequence in a stored program data processing system is described. An interrogation instruction causes the execution of a conditional check. As a result of this conditional check, one or the other of two bistable circuits is activated in dependence on the presence or absence of the prespecified condition. In an alternative embodiment, the apparatus can be modified to permit activation of both bistable circuits. One of the bistable circuits, when set, prevents execution of the next instruction in the instruction sequence. The setting of the other bistable circuit prevents execution of the next jump instruction occurring in the instruction sequence. A control signal in the interrogation instruction indicates which of the bistable circuits is to be set.

Method and apparatus for controlling the sequence of instructions in

A method for monitoring the sequential order between successive code signal groups in program controlled data processing systems is described. Each code signal group is supplied with an additional check character, e.g., a parity bit, derived from the succeeding code group. Consistency is tested by comparing the check character carried in a given code group and that derived from the following code group.

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Eichenau, Germany

Gerhard Prey