SU681575A1 - Key pulser - Google Patents

Description

The invention relates to telephone technology. A keyboard dialer is known, containing a shift register, a marker parcel forming unit, an output logic block, a keyboard and an encoder, the keyboard output being connected to the input of the encoder, the output of which is connected to the information inputs of the shift register and block forming the marker parcel, the information output of the shift register connected to the first input of the output logic block, the second input of which is connected to the output of the block of formation of the marker parcel, the control input of which is connected to the control input do shift register 1J. However, this dialer does not provide parameter control. The goal of the invention is to provide control of the parameters of the dial pad. To do this, the keyboard dialer contains the shift register. , the block of the formation of the marker parcel, the block of the output logic, the keyboard and the encoder, and you, the move of the tasturate is connected to the input of the encoder, the output of which is connected to the information inputs of the shift register and the block of formation of the marker parcel, the information output of the shift register is connected To the first input of the output block the logic, the second input of which is connected to the output of the marker parcel shaping unit, the control input of which is connected to the control input of the shift register, a shift state decoder is entered its register, wherein n data inputs of the decoder states of the shift register are connected to respective output n bits dniii shift register (where n - register order), and the output state of the decoder shift register is connected to an additional input of the output logic block. The drawing shows a structural electrical circuit of the proposed dialer. The custom dialer contains shift register 1, decoder 2 states of the shift register, output logic block 3, keyboard 4, encoder 5, marker parcel shaping unit 6.

The device works as follows.

In standby mode, with a handset placed on the handset, a clock frequency arrives at the input of the shift register, and service information of the communication line arrives at the input b -. The shift register 1 analyzes the information and passes it to the decoder 2 of the shift register state. The information from the decoder 2 runs on input g of the block 6 forming a marker parcel and is fed to the node of block 3 of the output logic. The marker parcel shaping unit 6 forforshiruet the marker parcel and sending it to the line through the unit 3, simultaneously prohibiting the sending of information from the decoder 2 to the communication line through the unit 3 for the duration of the first parcel marker. A clock frequency is supplied to the input d of block 6 of the formation of the marker parcel. After the completion of the code of the marker parcel, the information is transmitted from the decoder via block 3. Then the marker is sent back to the communication line, the shift register register information from the decoder 2, and so on. The delivery of the marker parcel code and information from the decoder 2 to the communication line during the entire service arrival time information from the communication line. Thus, an automatic check of all electronic nodes of the dial pad and a check of the integrity of the subscriber loop are performed. This check is carried out both during the hours of minimum load on the telephone network and at the time immediately preceding the call of the subscriber by the calling subscriber.

When dialing a telephone number, when the handset is disconnected from the device, the input of information from the communication line to the dialer and the output of information from the descrambler are prohibited. In the dialing mode, the signal from keyboard 4, through the encoder 5, is applied to the setup inputs in the shift register 1 and starts at the input g block b of the formation of the marker parcel. UNIT B forming the marker parcel A forms the parcel and sends it to the line through block 3, simultaneously prohibiting the sending of the number code

. B line of communication at the time of passage of the marker dressing. A clock frequency is supplied to the input d of block 6 of the formation of the marker parcel. At the end of the code of the marker parcel, a number code is supplied to the communication line through block 3. Then, a marker parcel, a number code, etc. is sent back to the communication line. The marker parcel code and the number code are issued to the communication line with a frequency equal to the clock one, while the button of keyboard 4 is pressed.

Using the proposed keypad dialer allows you to monitor the operability and 5 health of complex electronic nodes of the Keypad dialer, check the integrity of the subscriber loop, IITO leads to a significant increase in communication efficiency in digital telephone networks, reduces operating costs.

Claims (1)

1. German patent 1946064,. cl. 21 a 16/10, 1970.