SU607352A1 - Photoelectric dial - Google Patents

Description

(54) PHOTOELECTRONIC RUNNER

tact of the button 6 of the telephone apparatus, and the output of the control unit 9 is connected to the inputs of the unit 1 of photoelectric switches.

The dialer works as follows.

When the handset is lifted, the contact of the button 6 of the telephone is closed. The inputs of the photoelectric switch unit 1 through the control unit 9 are given a signal to turn on the light sources and the photocells. At the same time, the activation signal is applied to. the indicator 5, as well as the block 2, the driver 3, the block 4, the counter 7 and the block 8. The indicator 5 lights up and the device is ready for dialing.

The digit is manually entered by interrupting the luminous flux of one of the ten photocells, and the dialed digit is recorded and stored in block 2, where the signal goes to the driver 3 to form the telephone code of the digit and transfer it to the line. The recording signal of block 2 simultaneously includes block 4, which provides an exposure of the duration of the transfer of a digit to the line and the required inter-serial time between digits. In accordance with generally accepted standards for the telephone network, the exposure time of block 5 is about 0.2-I s, depending on the value of the digit. From the end of the telephone code signal of the imaging unit 3, the operation of block 4 is extended for inter-series time (approximately 0.4 s). Each time block 4 is turned on block 2, a dialing prohibit signal of the next digit is given for the transmission time of the telephone code of the previously dialed digit plus inter-run time, and indicator 5 is given an enable signal. At the end of the working out of the temporary you / block, block 4 turns on the indicator 5 and unlocks block 2 of the record number.

In addition, the turn on signal goes from block 4 to counter 7, which counts the sequence number of the digit. The first time the counter 7 is triggered in block 8, the long-distance number identification unit determines the type of communication using the code of the first digit recorded in block 2. If the first digit is "8 (the common sign of long-distance communication), it is memorized by block 8 and the corresponding control signal enters the control unit 9, where the signal to turn off the photoelectric switches is formed after dialing all digits of the subscriber’s phone number, and the time of the signal occurrence

Switching off depends on the type of communication and the received numbering in the telephone network, for example, for city communication after the seventh digit, and long-distance communication - after the eleventh. Photoelectric switches are turned off until the end of communication and can only be turned on by re-raising the handset.

Thus, the introduction into the photoelectronic dialer of the control units for the operation of the dialer, identifying a national number and a digit number counter ensures that the photoelectric switches are turned off after dialing the subscriber number until the end of communication, taking into account the numbering received in the telephone network for city and long-distance communication.

In the proposed device, the spurious sets do not break the connection during the negotiation; in addition, turning off the switches during a call reduces consumption.

Claims (1)

1. M. Dubinin. Photoelectronic dialer "Means of communication equipment, series TRS, 1967, vol. 4, s. 171 - 173.