. The Bell System technical journal . JWf^.. r in_aj S ago u tao G TELEPHONE SYSTEM OF THE UNITED STATES 63 telephone system in the United States to give satisfactory servicebetween any two points in the country. In order to accompHsh thisit is necessary to make arrangements for a minimum number ofswitches between any two points. Also the toll circuits which willbe used as parts of the built-up connections must be designed for avery high standard of transmission so that the overall efficiency ofthe built-up connection will be satisfactory. Arrangements have recently been worked out in the Unit
. The Bell System technical journal . JWf^.. r in_aj S ago u tao G TELEPHONE SYSTEM OF THE UNITED STATES 63 telephone system in the United States to give satisfactory servicebetween any two points in the country. In order to accompHsh thisit is necessary to make arrangements for a minimum number ofswitches between any two points. Also the toll circuits which willbe used as parts of the built-up connections must be designed for avery high standard of transmission so that the overall efficiency ofthe built-up connection will be satisfactory. Arrangements have recently been worked out in the United Statesfor meeting requirements of switched traffic more satisfactorily thanhas heretofore been possible. These arrangements may be brieflydescribed as follows: At different points in the country there have been selected a groupof eight very important switching points shown in Fig. 52. Theseeight regional centers will all be interconnected by high grade groupsof circuits directly, that is, without intermediate switch. Through-out the coun
Size: 1374px × 1819px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
