. Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems . nd the otherDrRy to direct the ringing current to the desired line wire. Group Connectors or Rotary Connectors.—One subscriber may havemore than one line. His lines may terminate on his premises in as manyseparate telephones; or on bells, with keys to permit any telephone toanswer any line; or on a private branch exchange (manual) board; or ina private automatic exchange. AUTOMATIC ELECTRIC COMPANYS APPARATUS 99 Usually only one call number is listed in the directory. If this lineis busy, the others will
. Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems . nd the otherDrRy to direct the ringing current to the desired line wire. Group Connectors or Rotary Connectors.—One subscriber may havemore than one line. His lines may terminate on his premises in as manyseparate telephones; or on bells, with keys to permit any telephone toanswer any line; or on a private branch exchange (manual) board; or ina private automatic exchange. AUTOMATIC ELECTRIC COMPANYS APPARATUS 99 Usually only one call number is listed in the directory. If this lineis busy, the others will serve as well, and must be tested, selected, andused. The group connector is arranged to perform the above duties. Itmay operate with the customary two digits, being called a 2-digit groupconnector or rotary connector, to distinguish it from the ordinaryline connector which connects only with single lines. It may operatewith one digit, in which case it is called a one-digit group this case the group of lines may occupy one level or more than onelevel. Bu5y Tone Mse
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttelephone, bookyear19
