CONTENTS

    Rec. No.    
      Q.140     Definition and function of signals
      Q.141     Signal code for line signalling
      Q.142     Double seizing with both-way operation
      Q.143     Line signal sender
      Q.144     Line signal receiver
      Q.145     Splitting arrangements
      Q.146     Speed of switching in international exchanges
      Q.151     Signal code for register signalling
      Q.152     End-of-Pulsing conditions – Register arrangements concerning ST (end-of-pulsing) signal
      Q.153     Multifrequency signal sender
      Q.154     Multifrequency signal receiver
      Q.155     Analysis of digital information for routing
      Q.156     Release of international registers
      Q.157     Switching to the speech position
      Q.161     General arrangements for manual testing
      Q.162     Routine testing of equipment (local maintenance)
      Q.163     Manual testing
      Q.164     Testing equipment for checking equipment and signals
      Q.180     Interworking of systems No. 4 and No. 5