. Bell telephone magazine . 24 tures designed exclusively for military■use. One of these is the 16-button Touch-loneS phone which permits ranking mili-tary officers to pre-empt busy lines initimes of emergency. This phone, with itsmultiple levels of priority, is an exampleof equipment designed by Bell Labora-itories and manufactured by WesternElectric for the government.■ Other special AUTOVON features in-clude: connections on calls anywhere onsthe network within 10 seconds or less,(direct dialing between a military instal-lation and an airplane in flight, unusual•conferencing arrangements and
. Bell telephone magazine . 24 tures designed exclusively for military■use. One of these is the 16-button Touch-loneS phone which permits ranking mili-tary officers to pre-empt busy lines initimes of emergency. This phone, with itsmultiple levels of priority, is an exampleof equipment designed by Bell Labora-itories and manufactured by WesternElectric for the government.■ Other special AUTOVON features in-clude: connections on calls anywhere onsthe network within 10 seconds or less,(direct dialing between a military instal-lation and an airplane in flight, unusual•conferencing arrangements and the abil-ity to press a button and get a hot lineconnection through the network. To pro-. vide maximum clarity of transmission onlong distance connections, AUTOVONwas designed as a four-wire networkrather than as the usual two-wire system. Protection from enemy attack, a para-mount requirement for military circuits,received careful attention in the AUTO-VON design. Switching centers were builtoutside possible target areas, and a newpolygrid routing arrangement was devisedto reduce the strategic importance of anysingle switching machine. When the worldwide network is com-plete there will be about 100 switchingcenters, or major intersections, along thisintricate web of communications network started with No. 5 crossbarswitches, but the new equipment beingadded will be of the electronic switch-ing type. The change to ESS will permitgreater flexibility in meeting changingdemands and will facilitate providing themore sophisticated communications re-quirements of the future. AUTOVON is managed by an inter-departmental Long Lines team from anoffice near Washington. The
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Keywords: ., bookauthoramerican, bookcentury1900, bookdecade1920, bookyear1922
