. The Bell System technical journal . 312-552 kc). (6) Group-translating (group-bank) equipment (D) to convert thebasic supergroup to five separate basic groups (60-108 kc) and viceversa. (c) Equipment for the location of cable and repeater faults (E and F). (d) Speaker and printer circuit equipments (G and H) to providetwo reduced-bandwidth telephone circuits, two telegraph circuits andone alarm circuit for maintenance purposes. It is clear that such circuitsshould be substantially independent of the main transmission equip-ment. Two principles were agreed very early in the planning; first, t
. The Bell System technical journal . 312-552 kc). (6) Group-translating (group-bank) equipment (D) to convert thebasic supergroup to five separate basic groups (60-108 kc) and viceversa. (c) Equipment for the location of cable and repeater faults (E and F). (d) Speaker and printer circuit equipments (G and H) to providetwo reduced-bandwidth telephone circuits, two telegraph circuits andone alarm circuit for maintenance purposes. It is clear that such circuitsshould be substantially independent of the main transmission equip-ment. Two principles were agreed very early in the planning; first, that theengineering of the various links should be integrated as far as possible,and second, that the items of equipment at each station should be pro-vided by the party best in the position to do so. In consequence: (i) Items of standard equipment were provided by the and at Clarenville and Sydney Mines (and by the Post Office at Oban),thus simplifying maintenance and repair problems. OO -nil! inn UJ _l_l > z lUDC< u. H en LU LU z > in I ^ o ,^^ u OO
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
