Ericsson Enterprise Gmbh

Ericsson Austria Ag

Gerhard Zimmermann

Ingemar Jaegtnes

Leif Ingemar Jaegtnes

A message transmission system having at least one subscriber's terminal device that is connected by way of a subscriber's line that is comprised of a first and second lead, with a subscriber's interface circuit (SLIC), preferably integrated, which comprises a loop detector circuit and subscriber's feeder circuit, such that in the area of, or on the subscriber's terminal device, a subscriber signaling display is provided, which may be controlled by way of a signaling control circuit, and such that a controllable switch ( ) is connected between the subscriber's interface circuit ( ) and the first lead (a) of the subscriber's line (a, b), which switch, in a first position, connects the first lead (a) of the subscriber's line (a, b) and an input of the subscriber's interface circuit ( ) with each other, and in a second position, connects the first subscriber's line lead (a) with a pole of an additional power source ( ). The other pole of the additional power source ( ) is connected to a voltage supply pole ( ) of the subscriber's interface circuit ( ), and the controllable switch ( ) may be controlled by way of the signaling control circuit ( ).

Message transmission system

A method and system to activate or deactivate modifiable features, the system comprising a protected device having a plurality of modifiable features and an identification means, a protective device for modifying the modifiable features of the protected device, wherein the protective device is adapted to be in selective in communication with the protected device and the protective device comprises a processor, a first memory in communication with the processor for storing a plurality of activation codes, a second memory in communication with the processor for storing a plurality of release programs corresponding to the activation codes.

Device for protecting an electronic apparatus

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.

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Vienna, Austria

Gerhard Zimmermann