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DE4422546A1
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Route list regulation method for switching data network
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DE4328341A1
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TDM/FDM radio system
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DE4326276A1
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Method and arrangement for operating a plurality of devices on a common data line
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DE4324459A1
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Method and arrangement for automatic transmission of information via a telephone network
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DE4228952A1
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Tone signal evaluation system for telephone exchange - with microcontroller supplied with frequency and level information for each tone signal voltage
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DD295439B5
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Circuit arrangement for a controllable clock oscillator
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DD295440B5
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Circuit arrangement for a controllable clock oscillator
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DD291434B5
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Method for recovering the bitmap of a data bit sequence from the plesiochronous bitmap of a data bit stream
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DD290087B5
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Circuit arrangement for decoding diphase code signals
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DD287821A5
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Method for transferring service information in digital message transmission systems
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DD287367B5
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Circuit arrangement of a control device for the power supply of an electronic subscriber circuit
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DD290311A5
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Circuit arrangement of a control device for the power supply of an electronic partner switch
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DD282793B5
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Method for synchronizing data signals with a reference clock
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DD277359A1
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Remote control method in digital communications transmission systems
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DD276578A1
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Circuit arrangement for converting a binary data signal into a CMI signal
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DD252719A1
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Circuit arrangement for sending and receiving alternating circuit identification marks in remote, particularly telephone systems
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DD240475A1
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Arrangement for the retransmission of signals in optical waveguide transmission systems
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DD223578A1
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Hf connectors for symmetric, shielded cables
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DD222177A1
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Protection circuit arrangement for facilities with rejected operating voltages
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DD213808A1
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Piezoelectric microphone
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