Around the World by Telephone 



THE first two-way telephone conversations completely encircling 

 the earth took place at New York City, during April, 1935. The 

 two telephone instruments used were located in separate rooms on the 

 26th floor of the Long Distance Building at 32 Sixth Avenue, New 

 York. In connection with these tests. Air. Gifford, President of the 

 American Telephone and Telegraph Company, spoke with Vice- 

 President Miller, and a number of other persons conversed over this 

 around-the-world circuit for some thirty minutes on April 25th. 



These world-encircling conversations were made possible by the very 

 close cooperation of the several communication interests involved, 

 including the British Post Office, the Netherlands Telephone Adminis- 

 tration, the Netherlands Indies Telephone Administration, and the 

 Bell System. 



The circuit used was completely four-wire and was made up of a 

 cable and open wire carrier telephone circuit from New York to San 

 Francisco, a radio link from San Francisco to Bandoeng, Java, a radio 

 link from Bandoeng to Amsterdam, the Netherlands, a land and sub- 

 marine cable link from Amsterdam to London, England, and another 

 radio link back to New York. 



The approximate lengths of each type of facility and the radio 

 frequencies used in each radio link are indicated in the table below: 



In completing this around-the-world connection the operating 

 personnel at the various points involved were working at vastly dilTer- 



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