Recommendation S.20

       1)   Replace 4 d) by the following:

       "d)  At any time, automatic transmission may be stopped by  either  the
            detection of incoming teleprinter signals or the forced clearing of 
            the call. In the latter case an alarm should be given and then the 
            call should be re-established by the  operator.  However,  if  the
            connection is still established but the automatic transmission has 
            stopped, an alarm should be given to the operator. If the alarm is 
            cleared by the operator within 30 seconds, proceed to step n) else 
            step m). Automatic transmission may be resumed after  a  delay  of
            1 second. If the transmission includes a TDM system with loop back 
            facilities, (refer Recommendation R.101 3.6.2b), this condition may 
            continue for a period of 5 to 7 seconds."

       2)   Add new point 4 n):

       "n)  Having waited for  a  period  of  at  least  7  seconds  from  the
            commencement of the alarm, the operator should send carriage return, 
            line feed then a WRU signal. (This delay is necessary to allow TDM 
            systems with loop back to restore to normal or choose an alternative 
            bearer, refer R.101 3.6.2b). If the called party's answer back  is
            correctly received, the tape should be reset after giving a further 
            carriage return and line feed.

       Automatic transmission can again be started."

       3)   Add new point 5):

"5.     Clearing  of  a  broadcast  call   shall   be   in   accordance   with
Recommendation U.44."