. Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems . Fig. 263.—Simplex controlling circuit for rural party line. battery. The line relay controls the loop-dialing circuit to the auto-matic switches. When the receiver is taken from the hook, the line relay pulls upand closes the line to the automatic switchboard. The operation of thecalling device is thus relayed to the switches, and the connection estab-lished in an obvious manner. Figure 264 shows the complete telephonecircuit. Reverting calls on this line are rung in the usual manner by handgenerators. It
. Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems . Fig. 263.—Simplex controlling circuit for rural party line. battery. The line relay controls the loop-dialing circuit to the auto-matic switches. When the receiver is taken from the hook, the line relay pulls upand closes the line to the automatic switchboard. The operation of thecalling device is thus relayed to the switches, and the connection estab-lished in an obvious manner. Figure 264 shows the complete telephonecircuit. Reverting calls on this line are rung in the usual manner by handgenerators. It is possible to add this equipment to existing magnetotelephones of suitable type. Fig. 264.—Rural telephone, magneto, simplex dialing. Code Ringing Machine.—There is now in use a code-ringing machinewhich is part of the central office equipment which is capable of givingbetter signals than can be made by hand. As many as twenty codesare available, although good service from the traffic standpoint will notpermit more than ten stations on one line, unless the conditions areunusual. In many instances the number should be much less than ten. The subscriber dials the call number in the usual way and code machine begins to ring long and short rings according to the RURAL AUTOMATIC TELEPHONES 313 number selected, and stops when the called station answers or the callingsubscriber hangs up his receiver. Reverting calls are made by dialing a reverting call number, postedon the telephones of the line, and hanging up the receiver. All the bellson the line will ring according to the code. When the called stationanswers, the ringing stops. If the called party does
Size: 2521px × 992px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjecttelephone, bookyear19
