Method for handling telephone calls of the voice type coming to a subscriber of public digital network with integrated services, who is only capable to receive text messages, particularly the subscriber who is deaf without speech
PL344507A1
Method of testing electronic digital circuits for their resistance to dynamic interferences
PL343538A1
Method of and circuitry for monitoring condition of batteries
PL336569A1
System for and method of monitoring condition of batteries
PL333716A1
Method of and set of instrumentation for measuring natural phasal frequency modulation and phase shift in a light fibre
PL329472A1
Telephone network tester
PL329099A1
Method of qualitatively assessing a telephone network
PL326311A1
System for equalising voltages in cells of flotating lead-acid storage batteries, in particular vrla ones
PL324539A1
R2 code recorder/simulator in particular for telephone exchanges
PL319334A1
Circuit arrangement of a two-stage pulse-type current regulator
PL314891A1
Method of and set of equipment for measuring parasitic optical frequency of lasers
PL311483A1
System generating sampling pulses
PL309711A1
Digital ac voltage monitoring system
PL309070A1
Method of and system for receiving decade dialling signals by a recording device
PL305738A1
Measuring head for hybrid systems
PL299491A1
Method of and system for transmitying dialing signals from a register of electromechanical exchange to a logging apparatus
PL297238A1
Motor converter with an additional feedback winding
PL295648A1
Current surge limiting circuit
PL294163A1
System for collecting and transmitting informations in particular those concerning states of translation, registers, scalers and subscriber inputs at electromechanical telephone exchanges
PL294162A1
Method of and system for monitoring condition of various assemblies of electromechanical telephone exchanges
