CONTENTS

 1     Objectives concerning Tables 1 to 4/E.422
 2     Manual or semi-automatic observations (Table 1/E.422)
 3     Comments concerning the use of Table 1/E.422
 4     How to fill in Table 1/E.422
 5     Automatic observations for CCITT Signalling Systems other than Signalling System No. 7 (Table 2/E.422)
 6     Comments concerning the use of Table 2/E.422
 7     How to fill in Table 2/E.422
 8     Automatic observation for Signalling System No. 7 – TUP (Table 3/E.422)
 9     Comments concerning the use of Table 3/E.422
10     How to fill in Table 3/E.422
11     Automatic observations for CCITT Signalling System No. 7 – ISUP (Table 4/E.422)
12     Comments concerning the use of Table 4/E.422
13     How to fill in Table 4/E.422