Page:United States Statutes at Large Volume 49 Part 2.djvu/487

 TELECOMMUNICATION CONVENTION. DECEMBER 9, 1932. 2503 ~] (3) Indication oj the wave to be usedJor the traffic (266) The call, as indicated in subparagraph (1) above, must be fol- lowed by the regulatory abbreviation indicating the frequency and/or the type of wave which the calling station proposes to use to transmit its traffic. [2061 When, as an exception to this rule, the call is not followed by the indication of the wave to be used for the traffic: [257] (a) if the calling station is a land station: it shall mean that this station proposes to use its normal working-wave, as indicated in the nomenclature, for the traffi(. [268] (b) if the calling station is a mobile station: it shall mean that the wave to be used for the traffic is to be chosen by the station called. [269] (4) Indication, when required, cJ the number oj telegrams or oj transmiuion by series [260) When the calling station has more than one telegram to transmit to the station called, the preceding preparatory signals shall be followed by the regulatory abbreviation and by the figure specify- ing the number of these telegrams. [261] Furthermore, when the calling station wishes to transmit these telegrams in series, it shall so indicate by adding the regulatory abbreviation requesting the consent of the station called. §5. REPLY TO CALLS AND SIGNALS PREPARATORY TO TRAFFIC (1) Method oj reply to calls The reply to calls shall consist of the following: not more than three times the call signal of the calling station; the word DE; the call signal of the station called. [ 2641 (2) Wave Jor reply [285] To transmit the reply to calls and to preparatory signals, the station called shall use the wave on which the calling station must listen. [266] As an exception to this rule, when a mobile station calls a coast station on the wave 143 kc (2,100 m), the coast station shall transmit the reply to the calls on its normal working-wave of the bands between 100 and 160 kc (3,000 and 1,875 m), as indicated in the nomenclature. [2871 (3) Understanding as to the walle to be used Jor the traffic [288) A. If the station called has an understanding with the calling station, it shall transmit: (a) the reply to the calli (6) the regulatory abbreviation indicating that from that time on it is listening on the frequency and/9r the type of wave announced by the calling station; Reply to CIllls aDd signals.