SU1264375A1 - Code transmitter-receiver - Google Patents

Abstract

FIELD: electrical communication, m. used as part of registers and markers automatic. telephones with indirect control and simplifies the transceiver. It contains unit 1 control; nor, a switching unit 2, a coding unit 3, six generators 5, six power units, six power units, six control units 7, a latch 8 signals, a decoder 9 and a test unit 10. By introducing a block of 4 filters, the number of amplifying and switching blocks has been reduced. In the initial state, a code receiver is connected to the line. To bring the device into the signal transmission mode from block 1, block 2 receives a command to disconnect from the receiver line and connect the transmitter to it. A command is received from block t to block 3, in which two of the six normally open contact groups are closed. As a result, the line through block 2 and block 3 in block 4 are connected to two corresponding filters of the six that are configured to pass alternating currents of six frequencies. A path is formed in the transmitter for passing a two-tone AC signal. 1 il.

Description

The invention relates to telecommunications and can be used as a part of registers and markers of automatic telephone exchanges with indirect control.

The aim of the invention is to simplify the device by reducing the number of amplifying and switching units.

The drawing shows a structural electrical diagram of a code transceiver.

The code transceiver comprises a control unit 1, a switching unit 2, an encoding unit 3, a filter unit 4, six generators 5, six power amplifiers 6, six control units 7, a signal lock 8, a decoder 9 and a verification unit 10.

Code transceiver operates as follows.

In the initial state, a code receiver is connected to the line. To bring the code transceiver into signal transmission mode, a command is sent from block 1 to block 2 to disconnect the code receiver from the line of the code receiver and connect the code transmitter to it. Then, from block 1 to block 3, a command is received, by which two of the six normally open contact groups are closed. As a result of this, two corresponding filters of six filters configured to pass alternating currents of six frequencies are connected to the line through block 2 and block 3 in block 4. After that, a path for transmitting a two-tone AC signal is formed in the code transmitter. If the code transmitter in question is part of the register, then a code receiver is connected to the line in the initial state of the transceiver in the marker, in which there are 5 generators idling that generate six-frequency alternating current signals. When a code transmitter is connected to the line in the register, then in the marker two out of six generators 5 will work not at idle, but through two corresponding amplifiers 6, the line, ’block 2, block 3 correspond to two

1264375 2 filters in block 4. At the same time, two out of six blocks 7 will receive a signal on the load operation (via a closed loop) of two generators 5 and two amplifiers 6. At the outputs of these two blocks 7, signals will be generated that will be input to the latch

8. This will fix the received signal. If the signal is received without distortion, then after its decoding in the decoder 9 in block-1, a command will be sent to generate and transmit to the register a response signal confirming the acceptance of the signal. If the signal is received with distortion, then from block 10 to the second input of block 1 will be transmitted a command to form and re-. cottage in. register signal-request to repeat the transmitted signal.

Claims (1)

Claim A code transceiver containing ²⁵ switching unit, the first input of which is connected to the output of the encoding unit, a control unit, the first and second outputs of which are connected to the control inputs of the encoding unit ³⁰ and the switching unit, respectively, six circuits from a series-connected generator, power amplifier and control unit as well as a test unit and a sequence35 but connected a signal retainer and a decoder, the output of which is connected to the first input of the control unit, the second input of which is connected to the output of the unit checks, distinguished by the fact that, in order to simplify it by reducing the number of amplifying and switching blocks, a filter block has been introduced, six of whose outputs are connected to six 45 inputs of the coding unit, the seventh output of the filter unit is connected to the second input of the switching unit, the third input of which is connected to the combined first inputs of the generators 50 of all six circuits, the second outputs of the power amplifiers of which are combined and connected to the fourth input of the switching unit, the outputs of the control units of all six circuits are combined 55 and connected to the combined inputs of the signal clamp and the test unit.