CONTENTS

Rec. No.    

INTRODUCTION – Principles of Signalling System R1

SECTION  1    –     Definition  and  function  of  signals
      Q.310     1.   Definition and function of signals

SECTION  2    –     Line  signalling
      Q.311     2.1 2600 Hz line signalling
      Q.312     2.2 2600 Hz line signal sender (transmitter)
      Q.313     2.3 2600 Hz line signal receiving equipment
      Q.314     2.4 PCM line signalling
      Q.315     2.5 PCM line signal sender (transmitter)
      Q.316     2.6 PCM line signal receiver
      Q.317     2.7 Further specification clauses relative to line signalling
      Q.318     2.8 Double seizing with both-way operation
      Q.319     2.9 Speed of switching in international exchanges

SECTION  3    –     Register signalling
      Q.320     3.1 Signal code for register signalling
      Q.321     3.2 End-of-pulsing conditions – Register arrangements concerning ST signal
      Q.322     3.3 Multifrequency signal sender
      Q.323     3.4 Multifrequency signal receiving equipment
      Q.324     3.5 Analysis of address information for routing
      Q.325     3.6 Release of registers
      Q.326     3.7 Switching to the speech position

SECTION  4    –     Testing arrangements
      Q.327     4.1 General arrangements
      Q.328     4.2 Routine testing of equipment (local maintenance)
      Q.329     4.3 Manual testing
      Q.330     4.4 Automatic transmission and signalling testing
      Q.331     4.5 Test equipment for checking equipment and signals
      Annex A to the specifications of signalling system R1