346 TelepJione Systems of the Continent of Europe 



The largest switch-room is at the General Company's old 

 central in the Brunkeberg division, where there are 5,547 sub- 

 scribers actually connected. The board was originally a Western 

 Electric single-wire, double-cord, series multiple of twenty tables 

 and an ultimate capacity of 7,000. It was altered section by section 



in the General Company's 

 workshop during the conver- 

 sion to metallic circuit, and 

 made to conform in pattern 

 to eleven new tables, which, 

 when added, raised the ulti- 

 mate capacity to 12,000 lines. 

 This great capacity is achieved 

 by reducing the size of the 

 jacks and by sloping some of 

 them over the operators' heads 

 in the manner shown at j in 

 fig. 114, which is an end sec- 

 tion of the board. The ex- 

 periment is interesting, but a 

 stretch above the floor of two 

 meters (6 ft. 6| in.) will be 

 required when the table is full. 

 The length of each table, which 

 takes 300 subscribers' lines and 

 three operators, is 1*62 meters. 

 The dimensions of the jacks 

 are : each jack 1 1 x 1 1 mm., and 

 each set of 100 jacks (five rows 

 of twenty), with necessary space 

 for screws, is 55 -x 249 mm. 

 The capacity of 1 2,000 is made 

 FlG - "4 up of 6 x 20 sets of 100 jacks. 



During conversion to metallic circuits, a portion of this board 

 was altered to single-cord, but, after some experience, changed 

 again to double. 



In the Southern, or Maria, exchange a switch-board, of six 

 tables of 3oo-line capacity, possessing several novel features has 



