. Multiplex combinations for economic telegraphy and telephony . Station*** be transmitted on toStation #3 through Station#3, it would be necessarythat this be done with To Quadruplex Apparatus. to j i , some form of repeater. Due lo Quadruple*. Apparatus. to the difficulty in keep-. ing repeaters in correctworking order for all con-ditions of weather andirregular conditions of thephysicals between average telephone exchanges, repeating messagesis resorted to only on a small scale. In case a telegraph circuit is to be operated through severalcities over the telephone lines,it is generally done
. Multiplex combinations for economic telegraphy and telephony . Station*** be transmitted on toStation #3 through Station#3, it would be necessarythat this be done with To Quadruplex Apparatus. to j i , some form of repeater. Due lo Quadruple*. Apparatus. to the difficulty in keep-. ing repeaters in correctworking order for all con-ditions of weather andirregular conditions of thephysicals between average telephone exchanges, repeating messagesis resorted to only on a small scale. In case a telegraph circuit is to be operated through severalcities over the telephone lines,it is generally done with the ordinarfy #26. magnetic telegraph relays. The telephone circuits can however beextended through any number of cities in the multiplex eystem. If a lar<?e amount of telegraphing is to be done betweentwo cities, and loss of time in operation counts for much, duplexesor quaclruplexes are principally operated on the physicals of thetelephone systems. It is requisite that the lines be absolutelyclear of ground,and that capacity and inductance be small,in orderthat either of the telegraph circuits and the telephones shallwork satisfactorily in the combination. This is especially trueif the ground is used as one conductor for the telegraph system* # Di9cus8ion on
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelephone, bookyear19
