џWPCL ћџ2BJ|xа АH аа АА X агга ХА6p&А6p&Х аеЄ† а Hр аааУ Уб cмˆ4 PŽТ б Fascicle VII.2 Р-Р Rec. U.2 PAGE1 Єее~† а HH аааУ Уб cмˆ4 PŽТ бPAGE2 Fascicle VII.2 Р-Р Rec. U.2 ~еа HH ааЬџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџHpи P Ј XА`ИhР!(#џџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџЬаа X  аУ Уб cмˆ4 PŽТ бRecommendation U.2 аЬџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџH јP Ј XА`ИhР!(#џџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџЬаСр89Сб cмˆ4 PŽТ бSTANDARDIZATION OF б cмˆ4 PŽТ бDIALS AND DIAL PULSE GENERATORS Ср8AСFOR THE INTERNATIONAL TELEX SERVICE аЬџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџHpи P Ј XА`ИhР!(#џџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџЬаСр8?Сб cмˆ4 PŽТ бФ ФУУ(former CCIT Recommendation E.2, 1951;ФФ Ср8>СУУamended at Arnhem, 1953 and Geneva, 1956)ФФ Та ТThe CCITT,ЦЦ УУconsidering а H аФФС С(a)СpСthat, when dials and dial pulse generators are used for the process of automatic selection by subscribers to the international telex network, it а H аis advantageous to standardize as far as possible the characteristics of such dials and dial pulse generators; аЬџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџH јP Ј XА`ИhР!(#џџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџЬаС  С(b)СјСthat the standardization of the dialling speedй€ dialling speedйб cмˆ4 PŽТ б and lost motion periods of dialsб cмˆ4 PŽТ бй$ lost motion periods of dials$йб cмˆ4 PŽТ б presents no technical difficulty; аЬџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџHpи P Ј XА`ИhР!(#џџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџЬаС С(c)СpСthat, for the satisfactory working of certain automatic systems, the time between successive pulse trains should not be less than 500 milliseconds, but that experience has shown that the minimum time taken by an experienced operator to rotate the dial is of the order of 300 milliseconds; С С(d)СpСthat pulse ratios from 1.2:1 to 1.9:1 will ensure the satisfactory working of existing automatic switching systems; С С(e)СpСthat these pulse ratios can be usefully adopted with a view to simplifying direct calling between subscribers, б cмˆ4 PŽТ бУУunanimously declares the view а H аФФС С(1)СpСthat in the international telex service, when dials or dial pulse generators are used for the automatic selection of subscribers: а H аТа ТТ№ ТС€ Сa)СpСthe dialling speed shall be standardized at 10 pulses per second with a tolerance of РР 10%;ЦЦ а H аТа ТТ№ ТС€ Сb)СpСthe lost motion period of dials shall be not less than 200 milliseconds nominal value;ЦЦ а H аТа ТТ№ ТС€ Сc)СpСthe interР-Рdigit pause of dial pulse trains generated by dial pulse generators shall not be less than 600 milliseconds;ЦЦ а H аТа ТТ№ ТТhpТС€СС€ С(2)СpСa)СP Сthat the pulse ratio must be between 1.2:1 and 1.9:1, the nominal ratio may be chosen as lying between 1.5:1 or 1.6:1;ЦЦ а H аТа ТТ№ ТТhpТС€Сb)Си Сthat when the selection signals pass through a regenerative repeater it may be advantageous to use a nominal ratio of 1.5:1.ЦЦ а HH а