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WO9618274A1
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Communication system with mobile telephones and process for operating the same
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Sinusoidal AC=DC voltage converter with primary-switched transformers
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Circuit arrangement for generation of synchronization signals in a thermal imaging device
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Filter for an echo canceler
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Echo canceller with analogue coarse canceller and digital fine canceller
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Method for testing telephone exchanges or parts thereof and device for carrying out the method.
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Method for testing telecommunication systems or parts thereof
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Method for transmitting data via a transmission unit and a circuit arrangement for performing the method.
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Method for transmitting data between private branch exchanges
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Device for connecting and joining electric conductors
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Data input for system testing in telephone networks
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Testing device of module
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Method and apparatus for bending workpieces
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Plug-and-socket connector with insulating caps on ends of pins
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Curvilinear controlled device for moving workpieces or tools
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Testing system for household telephone line
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Method and circuit for reducing aberrations.
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Answer station for automatic Testing of connected to a telecommunications network terminals
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Method for determining critical errors, in particular for a communication system, and a circuit arrangement operating according to this method.
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CH685220A5
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Method and circuit for reducing harmonics.
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