SU1270906A1 - Device for identifying subscriber - Google Patents

Description

The invention relates to a telecommunication technique using physical communication lines, and is intended to identify messages on the receiving side in the absence of the called party.

The purpose of the invention is to increase the reliability of identification.

The drawing shows an electrical block diagram of a subscriber identity device _,? The subscriber identification device comprises a switch 1, a pulse counter 2, a decoder 3, a memory unit 4, a tone frequency generator 5, a detector 6, a matching unit 7, a call receiving unit 8, a pulse series allocation unit 9, a trigger 10, an AND-NOT 11 element, key 12, element 13.

The subscriber identity device operates as follows.

Upon receipt from the physical line of communication to the input of the device of the ringing signal of the exchange, the latter, passing through the switch 1, is sent to the call receiving unit 8. The control signal when it is triggered from the ringing signal is fed to the first input of the counter 2 pulses, setting Log on its inputs. 1. At the same time, the Log is set at the outputs of the decoder 3. 0, except for the additional one on which the Log should be installed. 1, Thus, at the two inputs of the AND-NOT 11 element there is a Log. 1 and simultaneously with them, a pulse from the output of call receiving unit 8 acts on its first input. As a result, a negative impulse will appear at the output of the AND-NOT 11 element, which will set the RS-trigger 10 to a position where the signal from its output will switch the switch 1 and open the key 12. In this case, the PBX communication line through switch 1 is disconnected from block 8 receiving a call and connected to block 7 coordination. In this case, the tonal frequency comes from the generator 5 tonal frequency. through the public key 12, through the block 7 coordination and switch 1 to the communication line. When the circuit of the communication line is manipulated on the transmitting side, for example, by a dial of the dialer, pulses of an interrupted tone frequency appear in the input circuit of the detector 6, which are detected by the detector 6, and then in the form

270906 of the transmitted pulse sequence are received at the counting input of the counter 2 pulses. At the same time, a series of pulses from the output of detector 6 5 is also sent to block 9 for extracting series of pulses (envelope of series of pulses), which gives a negative pulse at the end of a series of pulses from the dialer. This pulse ~ 10 will set the RS-trigger 10 to its initial state, while simultaneously allowing the information from the decoder 3 to be written to the memory unit 4. At the same time, the device will be transferred to the initial state 15, that is, waiting for a new call and receiving messages.

The result, recorded in memory block 4, is displayed on indicators 14. - The fixed number of message 20 can be reset only by decision of the receiving information subscriber.

Claims (1)

The invention relates to telecommunication technology using physical communication lines, and is intended to identify messages on the receiving side in the absence of the called subscriber. The purpose of the invention is to increase the reliability of identification. the drawing shows an electrical block diagram of the subscriber identification device; the subscriber identification device comprises a switch 1, a pulse counter 2, a decoder 3, a memory block 4, a tone frequency generator 5, a detector 6, a matching block 7, a call receiving block 8, a selection block 9 a series of pulses, trigger 10, elements AND-NOT 11, key 12, element I 13. The subscriber identification device operates as follows. When arriving from the physical link to the input of the PBX device call signal, the last pass through the switch 1 enters the call receiving unit 8. The control signal when it is triggered from the ring signal is fed to the first input of the counter 2 pulses, set at its inputs Log. 1. In this case, the outputs of the decoder 3 is set to Log. Oh, except for the additional one on which the Log should be installed. 1. Thus, at two inputs of the element AND-NOT 1 there is a Log. 1 and at the same time with them on its first input is a pulse from the output of block 8 call reception. As a result, at the output of the NANDI element 11, the Wits negative pulse, which sets the RS-flip-10 to a position where the signal from its output switches the switch 1 and opens the key 12. At the same time, the PBX link through the switch 1 is turned off from the call receiving unit 8 and connected to the co-lacing unit 7. In this case, the tonal frequency is received from the generator 5 of the tonal frequency. through the public key 1 through the matching unit 7 and the switch 1 to the communication line. When a link line is manipulated on the transmitting side, for example, a dial of a dialer, pulses of an interrupted tonal frequency appear in the input circuit of detector 6, which are detected by detector 6, and then in view 06 of the transmitted pulse sequence is fed to the counting input of the counter 2 pulses . At the same time, a series of pulses from the output of the detector 6 enters the block 9 of the allocation of a series of pulses (the envelope of a series of pulses), which gives a negative pulse at the end of a series of pulses from the dialer. This pulse will set the short-circuit trigger 10 to the initial state, at the same time permitting the writing to the memory unit 4 of information from the decoder 3. In this case, the device is reset to the initial state, i.e. waiting for a new call and receiving messages. The result, recorded in memory block 4, is displayed on indicators 14. A fixed message number can only be reset by the decision of the subscriber receiving the information. Claims The subscriber identification device comprising a switch, a pulse counter whose outputs are connected to the decoder inputs, a memory block whose n inputs are connected to the n outputs of the decoder, and a tone frequency generator, characterized in that it has a detector, a matching unit, a call receiving unit, a pulse train output block, a trigger, an NAND element, a key, an AND element, whose inputs are connected to the outputs of a pulse counter, the first input of which is connected n with the output of the call receiving unit, the input of which is connected to the first output of the switch, the second output of which is connected to the first input of the matching unit, the second input of which is connected to the output of the key, the first input of which is connected to the output of the tone frequency generator, the second input of the key is connected to the output of the trigger and the input of the switch, and the output of the matching unit is connected to the input of the detector, the output of which is connected to the second input of the pulse counter and the input of the block in the 1-pulse series, the code of which is connected to the first input of the trigger EPA and additional input memory block, the second input coupled to an output latch elemen312709064 That is AND-NON, the first input of which is connected by the input of the counter, and the third input is connected to the first output of the decoder by the second input AND-NOT connected to the auxiliary input of the AND-NOT element.