. Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems . RCORIi00> Fig. S4.—Circuit of 2-digit group connector. Two-Digit Group Connector.—The circuit of a two-digit group con-nector is shown in Fig. 84. There are two private wipers, and the privatebank has a pair of contacts for each point (like line bank). P-\ is theupper wiper and P-2 the lower wiper, each engaging the respective con-tact of the pair. Each level may be divided up into a number of groups of lines, ormay be used as separate lines. The grouping is done on the privatebank. The two conta
. Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems . RCORIi00> Fig. S4.—Circuit of 2-digit group connector. Two-Digit Group Connector.—The circuit of a two-digit group con-nector is shown in Fig. 84. There are two private wipers, and the privatebank has a pair of contacts for each point (like line bank). P-\ is theupper wiper and P-2 the lower wiper, each engaging the respective con-tact of the pair. Each level may be divided up into a number of groups of lines, ormay be used as separate lines. The grouping is done on the privatebank. The two contacts of a pair are connected together for all thepoints except the last of the group. They are left open. The lower contact of each pair, engaged by P-2, is the usual privatecontact and is connected to the BCO of the lineswitch of the called private wiper P-2 is likewise the usual busy-test wiper of the con-nector described in Fig. 60. 100 AUTOMATIC TELEPHONY The upper contact of each pair has to do only with hunting an idleline in the group. The private wiper P-l is used
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttelephone, bookyear19
