home *** CD-ROM | disk | FTP | other *** search
-
-
-
-
-
-
- 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."
-
-
-
-
-
-
-
-