Page:United States Statutes at Large Volume 63 Part 2.djvu/544

 63 STAT.] MULTILATER.AITELECOMMUNICATION-OCT. 2, 1947 (Chapter XIII, art. 29 RRJ (667-676) 667 (2) In the case of transmission by series, the end of each rad.otelegram is indicated by the signal . - . -. and the end of the series by the call sign of the sending station and the letter K. 668 § 21. Acknowledgment of Receipt. 669 (1) The acknowledgment of receipt of a radiotelegram is given by transmitting the letter R, followed by the number of the radiotelegram. Such acknowledgment of receipt is preceded by the following formula: - call sign of the station which has been sending; - the word DE; - call sign of the station which has been receiving. 670 (2) The acknowledgment of receipt of a series of radio- telegrams is given by transmitting the letter R, followed by the number of the last radiotelegram received. Such acknowl- edgment of receipt is preceded by the above formula given in 669. 671 (3) The acknowledgment of receipt is transmitted by the receiving station on the frequency used for the reply to the call (see 631). 672 § 22. End of Work. 673 (1) The end of work between two stations is indicated by each of them by means of the signal ...-. . (end of work), followed by its own call sign. 674 (2) For these signals the sending station continues to use the working frequency and the receiving station the frequency used for the reply to the call. 675 (3) The signal .. - -. (end of work) is also used: - when the transmission of radiotelegrams of gen- eral information, meteorological information and general safety notices is finished, and - when transmission is ended in long distance ra- diocommunication services with deferred ac- knowledgment of receipt or without acknowledg- ment of receipt. 1841

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