RU2156037C1 - Device for providing intellectual network services - Google Patents

Abstract

FIELD: private telephone networks. SUBSTANCE: device has personal computer, controller and digital computer, connection establishing controller, interaction signal unit and commutation jack field, telephone lines, n telephone sets, address unit, connection setting unit, accumulation unit for real point failures, station testing unit, user set testing unit, digital matrix commutator. Device provides continuous monitoring of state of user lines and user sets and automatic selection of new address, when failure is detected in user lines and user set. Calling user is informed about call rerouting. EFFECT: increased reliability of communication. 3 cl, 12 dwg

Description

 The invention relates to telecommunications and can be used in telephone networks with increased requirements for reliable communications.

 A known method of providing intelligent network services described in [1]. In [1], the system shown in FIG. 1 and comprising a telephone temporary switch 1 with channel modules 2 connected to it, and on the subscriber side, coders / decoders 3 and subscriber terminals 4 for conducting telephone conversations. Between the encoders / decoders and subscriber terminals, a subscriber interface unit 5 is included, which provides the organization of connections / disconnections at the initiative of the subscriber or telephone switchboard. The connection is controlled by a telecommunication processor 6 with control programs 7 and look-up tables 8. All applications for organizing connections are registered on the analyzer 9 and transmitted to the telecommunication processor 6.

 The system operates as follows. After receiving an incoming call, the system determines the channel from which it came, as well as a free or busy subscriber line to the destination of the call. If the subscriber line is free, then the call is routed along this line. If the line is busy, then the system, based on the subscription information, determines whether the service can selectively place an incoming call on hold for a subscriber called on this line. If the called subscriber is entitled to such a service, the system determines whether the information is transmitted via the subscriber line: voice or data. If data is transmitted over the subscriber line, the busy signal is sent to the caller, and the call waiting signal is not transmitted over the subscriber line. If a voice signal is transmitted along a busy line, then a call waiting signal is transmitted along a called subscriber line.

 A disadvantage of the known system is the inability to transmit information in the event of an emergency state of the subscriber line of the called subscriber.

 As a prototype, the authors selected "Device for the provision of intelligent network services" [2].

 The known device (see Fig. 2) contains "n" incoming communication lines 1, switching field 2, "n" outgoing communication lines 3, "n" input interface units (BSVs) 4, consisting of an occupation unit 5 and a receiving unit / transmitting information 6, “n” outgoing interface units (BSI) 7, consisting of an outgoing line busy unit 8 and a signal receiving unit from a called subscriber 9, an interaction signal unit 10, a controller 11, a controller bus 12, an electronic computer complex (EEC) ) 13, consisting of a digital computer (digital computer) 14, controller 15 and PC 1 6.

 When a request for a service arises, for example, to establish a connection between the calling subscriber (VCHA) and the called (VMA) via the incoming communication line 1 from the VSCA, the “Occupation” signal is sent to BSV 4. Lesson 5 blocks this signal and transmits it in a converted form to bus 12. The controller 11 provides control BSV 4 and BSI 7, the switching field 2 and the interaction with the EVK 13 in the process of servicing applications for establishing a connection with the subscriber.

 At the command of the controller 11, the information transmitting / receiving unit 6 issues a “Number request” signal on the incoming line 1. Information about the number is transmitted on the incoming line 1, is converted in the transmit / receive unit 6, and through the bus 12 it goes to the controller 11, and then to the EVK 13. In EVK 13, the application is analyzed for the subject of the service (for example, arranging the connection of the VSCHA with the VMA) and formation of management information for VMA. In this case, it will be the physical number of the called party. EVK 13 transmits the VMA physical number to controller 11. Controller 11 transmits the Occupation command via bus 12 to the occupation block of outgoing line 8, which in turn transmits this signal to the station toward outgoing line 3. In response to VMA (or VMA station) gives the “Information request” signal to the device side, which is received by the controller 11. The VMA response is provided by the signal receiving unit 9, and then transmitted to the controller 11. Upon the received “Subscriber Response” signal, the controller 11 issues a command to the switching field 2 to switch off govornogo path between the BMA and VSCHA.

 At the end of the conversation, “Hang up” can come from both the VMA and the VSCA. At the end of the VMA, it enters the outgoing line 3, is monitored by the signal receiving unit 9, and transmitted via the bus 12 to the controller 11. At the command of the controller 11, the Occupation signal issued on the outgoing line 3 is removed, and the switching field 2 disconnects the talk wires. At the same time, the controller 11 transmits the “End” signal to the information reception / transmission unit 6, where it is converted and issued via the incoming line 1 to the side of the switching station. When the “Occupation” signal is removed by this station, occupation unit 5 returns to its initial state.

 Hang up from the calling party is handled similarly to hang up from the called party.

 Thus, the known device provides the organization of the connection connected to the switching field of 2 subscribers. The organization of the connection is preceded by the process of exchanging signal messages (parcels). At the end of the exchange process, switching field 2 for the exchange of telephone information is switched off.

 Along with the organization of the connection, the known device provides intelligent network services related to call forwarding from one subscriber to another. This service is implemented in accordance with [4] as a service of an absent subscriber, when, at the request of a subscriber, calls received to his number can be received at a station at a certain period of time and transferred to other (forwarded) phone numbers. The call forwarding service is initialized by the telephone network subscriber for a period of, for example, its absence and is not related to the technical state of the telephone network itself. The technical means of the known device do not provide for call forwarding in case of emergencies in certain parts of the network, for example, in subscriber lines or subscriber or station equipment. The forwarding service in the known device is preliminary, planned in nature and does not provide for an immediate change of address in the event of emergency situations in the network.

 The objective of the proposed technical solution is to increase the efficiency of call forwarding in case of emergencies in certain parts of the network.

 The technical result of the proposed technical solution lies in the continuous monitoring of the status of subscriber lines and subscriber equipment and the automatic selection of a new address when an emergency condition is detected with a notification of the fact of forwarding to the calling subscriber.

To achieve a technical result, elements of control and processing of signal (control) information are introduced into the station and subscriber equipment, providing:
monitoring the status of subscriber lines and subscriber equipment, both in the initial state (lack of connection of subscribers) and in the active state (organization of connection and voice exchange);
selection of a new address (physical point of the subscriber) in the event of an emergency state of the subscriber line of the called subscriber;
reporting the fact of call forwarding to the calling subscriber and, with his consent, organizing a connection with the forwarded subscriber.

 The essence of the technical solution to improve communication reliability consists in the continuous exchange of test signals between network elements along signaling circuits and information circuits, the failure of which is recorded as an accident of the corresponding network element and as a basis for the telephone exchange to prepare the connection of the calling subscriber with the called one connected to another, in advance selected subscriber line.

 The technical result provided by the proposed technical solution is that in a device for providing intelligent network services, comprising a personal computer connected in series, a controller and a digital computer connected to each other and to a digital computer through a controller bus, a connection organization controller, a signal block interactions and switching field, as well as telephone trunks and control trunks, introduced "n" subscriber units control station control unit, digital matrix switch, "n" telephones connected to the controller bus address module, connection assignment unit, emergency state drive of physical points of the switching field, the information input of which is connected to the control output of the station control unit, the first inputs and outputs which is connected to the inputs and outputs of the block of interaction signals, and the second inputs and outputs to the first inputs and outputs of the block of coding-decoding devices, the second inputs and outputs of which connected to the inputs and outputs of the digital matrix switch, the signal input of which is connected to the output of the connection unit, each telephone set is connected via a digital connecting line to the switching field, and each telephone set is connected via its subscriber control unit and control connecting line to the corresponding control input of the digital matrix switch, "n + 1" whose control input is connected to another controller output.

 Each of the “n” telephones contains a serial connection of a keypad, a dialer and a pairing unit, the second input of which is connected to the output of the driver of interaction signals, the input of which is connected to the output of the lever switch and the input of the ringing unit, the first output of which is connected to the input of the electro-acoustic transducer, the second the output is with the second input of the interaction signal generator, and the third output is with the input of the telephone signal analyzer, and the telephone signal analyzer, etc. the telephone signal generator, the filter unit and the telephone are connected in series, the second input of the filter unit is connected to the output of the speech-converting unit, the first input of which is connected to the microphone, the second input to the second output of the telephone signal analyzer, and the linear input and output are connected to the telephone line, in parallel which is connected to the loop organization block.

 Each of the "n" subscriber control units contains a loop organization unit connected between the incoming and outgoing control connecting line, the control input of which is combined with the input of the test signal sensor, the output of which is connected to the third input of the telephone unit, the control input of the loop organization unit with the control input of the telephone line loop organizer, and through the OR element it is connected to the output of the telephone device lever switch and the output of the test signal analyzer the input of which is connected to the incoming control connecting line and the second input of the ringing unit of the telephone set, and the output to the resetting input of the timer, the triggering input of which is connected to the output of the lever switch of the telephone set, and the output of the timer is connected to the input of the alarm sensor, the output of which is connected to the second input of the telephone signal analyzer of the telephone set.

 In FIG. 1 shows an analogue of the device, in FIG. 2 is a prototype of the device, in FIG. 3 - the proposed "Device for the provision of intelligent network services", in Fig. 4 is a diagram of a telephone set and a circuit of a subscriber monitoring unit, in FIG. 5 is a diagram of a station control unit; FIG. 6 is a diagram of an address module; FIG. 7 is a schematic diagram of a connection controller; FIG. 8 - a speech-transforming unit as a part of a telephone set; in FIG. 9 is a diagram (algorithm) of the organization of connections, in FIG. 10, 11 - structure of service messages.

 The device for providing intelligent network services contains (Fig. 3) a switching field 1, a digital matrix switch 2, "n" telephone trunks 3, "n + 1" control trunks 4, a block of coding and decoding devices 5, a block for setting connections 6 , station control unit 7, interaction signal unit 8, emergency state drive of physical points of the switching field 9, address module 10, connection manager 11, digital computer 12, controller 13, PC 14, controller bus 15, "n" - t telephone sets 16, "n" of subscriber control units 17.

 The switching field 1 contains a matrix switch 18 and the control unit of the switching field 19.

 Telephone apparatus 16 in accordance with [3] contains a keypad 20, a dialer 21, a pairing unit 22, a lever switch 23, an interaction signal generator 24, a ringing signal unit 25, an electro-acoustic transducer 26, a telephone signal analyzer 27, a telephone transducer signals 28, a filter unit 29, a telephone 30, a microphone 31, a speech-transforming unit 32, a loop organization unit 33.

 The subscriber control unit 17 (Fig. 4) contains a loop organization unit 34, a test signal analyzer 35, a test signal sensor 36, a timer 37, an emergency state sensor 38, an OR element 39.

 The station control unit 7 contains (Fig. 5) a sensor 40, an analyzer 41, a timer 42, a block of emergency state registers of physical points 43, a block of control registers 44, an OR element 45.

 The address module 10 contains (Fig. 6) a register for receiving the state of physical points 46, a write-read control unit 47, a memory block for the state of physical points 48, a memory block of forwarded physical points 49, a state analyzer of physical points 50, and a write-read control unit 51.

 The connection manager 11 in accordance with [2] contains (Fig. 7) a microcomputer 52, read-only memory (ROM) 53, random access memory (RAM) 54, control register 55, scanner 56, scan point field 57, control register field 58.

 The speech-converting unit 32 contains (Fig. 8) an analog-to-digital converter 59, a transmitter on transmission 60, a weighing filter 61, an error minimizing unit 62, an excitation pulse generator 63, a synthesizer 64, a digital-to-analog converter 65, a transmitter on reception 66, a parameter analyzer 67, reference frequency block 68, speed analyzer 69.

 The calculator 60 comprises a weighting unit for the speech signal 70, a weighting unit for the pulse sequence 71, a cross-correlation function calculator 72, an autocorrelation function calculator 73, and a pulse search unit 74.

 The personal computer 14, the controller 13 and the digital computer (digital computer) 12 are connected in series. Connection organization controller 11, digital computer 12, connection setting unit 6, interaction signal unit 8, switching field 1, emergency state drive of physical points of the switching field 9, address module 10 are interconnected via the controller bus 15. Information input of the emergency state accumulator of physical switching points field 9 is connected to the control output of the station control unit 7, the first inputs and outputs of which are connected to the block of interaction signals 8, and the second inputs and outputs to the block of coding-decode devices 5, the other inputs and outputs of which are connected to a digital matrix switch 2, the control input of which is connected to the output of the connection unit 6, each telephone 16 using a telephone connecting line 3 through a digital matrix switch 2 is connected to the switching field 1, and through its subscriber control unit 17 and control connecting line 4 - to the corresponding control input of the digital matrix switch 2, "n + 1" control input of which is connected to another output of the controller 1 3.

 Each of the "n" telephones 16 contains a serialized keypad 20, a dialer 21 and a pairing unit 22, the second input of which is connected to the output of the interaction signal driver 24, the input of which is connected to the output of the lever switch 23 and the input of the ringing unit 25, the first output of which connected to the input of the electro-acoustic transducer 26, the second output to the second input of the interaction signal generator 24, and the third output to the input of the telephone signal analyzer 27, and the telephone analyzer GOVERNMENTAL signal 27, the transmitter 28 of telephone signals, the filter unit 29 and phone 30 are connected in series. The second input of the filter unit 29 is connected to the output of the speech-transforming unit 32, the first input of which is connected to the microphone 31, the second input to the second output of the telephone signal analyzer 27, and the line inputs and outputs are connected to the telephone connecting line 3, in parallel with which the loop organization unit 33 is connected .

 Each of the “n” subscriber control units 17 contains a loop organization unit 34 connected between the incoming and outgoing control connecting lines 4, the control input of which is combined with the input of the test signal sensor 36, the output of which is connected to the third input of the interface unit 22 of the telephone set 16, the control input of the loop organization block 34 is combined with the control input of the loop organization block 33 of the telephone 16, and through the OR element 39 is connected to the output of the lever switch 23 of the telephone 16 an analyzer of test signals 35, the input of which is connected to an incoming connecting line 4 and the second input of the ringing unit 25 of the telephone 16, and the output of the analyzer of test signals 35 is connected to a reset input of a timer 37, the triggering input of which is connected to the output of the lever switch 23 of the telephone 16, and the output of the timer 37 is connected to the input of the alarm sensor 38, the output of which is connected to the second input of the telephone signal analyzer 27 of the telephone 16.

 A device for providing intelligent network services operates as follows. Before starting operation with the PC 14, the device for the provision of intelligent network services is loaded with the programs and data necessary for the provision of intelligent network services. Programs are downloaded through the controller 13 to the digital computer 12. Data is downloaded through another output of the controller 13 to one of the control connecting lines 4 connected to the digital matrix switch 2. The data includes address information containing the telephone numbers of the subscribers and the corresponding physical points of the switching field 1. Each physical point of the switching field 1 corresponds to a certain Subscriber's phone address To establish a connection with a forwarded subscriber or forwarded subscribers in the event of an emergency condition of connecting lines 3 and 4 or telephone sets 16 with PC 14, telephone numbers and physical forwarding points are entered into the address module 10 for specially selected subscribers. The process of organizing the connections is controlled by the controller 11, which provides reception and processing of control commands received via control connecting lines 4 from telephone sets 16, generating control commands in the direction of control connecting lines 4, determining their status (active, passive) and transmitting / receiving commands for organizing connections to / from computer 12.

 Connecting lines 3, 4 can be in the initial, active and emergency state. During operation, dynamic monitoring of connecting lines 3, 4 is carried out. In the initial state, code sequences are continuously transmitted in both directions along connecting lines 3, 4, we will arbitrarily denote them by C1. The subscriber control unit 17 establishes a loop of the control connecting line 4, and the telephone 16 - the loop of the telephone line 3, returning the code sequence C1 to the station control unit 7.

 The initiator of activation of the control connecting line 4 may be the controller of the organization of connections 11 or the telephone 16. The initiator of the organization of connections will issue a new code sequence to the control connecting line 4, we will arbitrarily denote it by C2. The opposite side, when ready to continue the activation process, responds with its combination, we will arbitrarily denote it by C3. With the beginning of the exchange of code combinations C2, C3, the cable for connecting lines 3 and 4 is removed. If the initiator of the connection is controller 11, then the cable is removed from the connecting lines 3 and 4 after receiving the C2 combinations by the subscriber control unit. If the initiator of the connections is the telephone 16, then the removal of the loop of the connecting lines 3 and 4 occurs when you pick up the handset of the telephone 16.

 The emergency state of the connecting line 3 or 4 is the absence of the combination C1 returned through the loop or the combination C3 is not received within the set time in response to the combination C2 in the control connecting line 4. Upon confirmation of the emergency state of the connecting line 4, the generation of the combination C2 is stopped and the initial state is transferred - transmission by station control unit 7 of combination C1. The station control unit 7 constantly monitors the state of the physical points of the switching field 1 and transfers this state to the drive 9, preparing them for writing to the address module 10. In the event of an emergency condition of the connecting lines 3 or 4, the station control unit 7 transmits the connection emergency value from its control output lines to drive 9, marking it with a special code (indicator). The process of adjusting the address information in the address module 10 is controlled by the controller 11, which polls the state of the physical points stored in the drive 9. If there is an emergency state of the physical points in the drive 9, they are read into the address module 10 by the commands from the controller 11. For this, the address module 10 includes a drive for telephone numbers of subscribers and corresponding physical points of the switching field 1 with status marks.

 Thus, by the time the connection is established, the state of all physical points to which the subscribers are connected are stored in the address module 10.

 If it is necessary to organize telephone calls, the calling subscriber (VSCHA) picks up the handset (MTT). When the MTT is removed from the telephone 16, the MTT is removed signal packet is transmitted via the control connecting line 4 to the digital matrix switch 2. The controller 11 constantly scans the connecting lines 3.4 and, upon detection of the signal signal, the “MTT removed” will give a signal packet Done, ”and a buzzer will be heard in the telephone circuit. All signal packets are exchanged through a block of coding and decoding devices 5 and a block of interaction signals 8. A block of coding and decoding devices 5 converts the serial code received via the control connecting line 4 into a parallel, and vice versa, parallel code coming from the block of interaction signals 8 in serial. The block of interaction signals 8 acts as an intermediate element (port), which serves to accumulate code sequences of signal packets coming from control trunks 4. With the reception of the signal “Ready”, the subscriber dials the first digit of the number, after which the controller 11 will remove the signal “Ready” . At the end of dialing, the controller 11 will contact the address module 10 with a request about the state of the physical point of the switching field 1 to which the called subscriber is connected. At the time of the search for the subscriber in the direction of the telephone 16 will transmit a signal package "Wait." The address module 10 in accordance with the received number from the VSHA will detect the state of the physical point of the switching field 1 to which the subscriber is connected. If the physical point is not in an emergency state, then the controller 11 will form a call to the called party (BMA). The call will be received by the telephone set 16 VMA, the electro-acoustic transducer of the telephone set 16 will work and at the same time the signal packet "Call control" (CPV) will be transmitted to the side of the VSCA. The CPV signal packet is detected by the controller 11, through which a command to organize the connection is formed through the bus 15 in the digital computer 12. According to this command, the digital computer 12 through the control unit 19 will provide the BMA and the VSCA through the matrix switch 18 of the switching field 1, and through the connection setting unit 6 - connecting the connecting lines 3 through the digital matrix switch 2 to the switching field 1. Synchronization will start with the connection being switched off by signal speech-transforming blocks of telephone sets 16 ВЩА and ВМА. At the same time, the CPV signal will be received by the telephone device 16 VSCA, which will be listened to by the telephone of the telephone apparatus 16. With the removal of the MTT VMA, the transmission of the CPV signal will stop and the exchange of information will begin. The disconnection of the switching field 1 will occur after the handset is laid down by one of the subscribers. The connection organization algorithm in the absence of an emergency state of the VMA physical point is shown in FIG. 9a.

 In FIG. Figure 9b shows the option of establishing a connection if VSHA agrees to negotiate with the forwarded subscriber. When the called physical point is in an emergency state, the address module 10 will generate a signal to the controller 11 containing information about the possibility of establishing a connection with the redirected physical point. Having information about the forwarded physical point, the controller 11 will generate a signal picket and transmit it along the control connecting line 4 to the side of the VSCA, which will be sent to the telephone of the telephone 16 in the form of a musical phrase known to the subscriber as an offer to conduct a conversation with the forwarded subscriber. If the subscriber agrees to have a conversation in this mode, he waits for the connection, if not, hangs up (see Fig. 9c).

 The controller 11, after transmitting the VSCA call forwarding proposal, expects it to "End" for a predetermined time. If there is no “Hang up” signal for a predetermined time, the controller 11 will generate a command in the digital computer 12 to arrange the connection of the VSCA with the forwarded subscriber. In FIG. 9b the forwarded subscriber is represented by the TAZ telephone. In the presence of a “Hang up” signal from the VSHA, the controller 11 terminates the procedure for establishing a connection.

 The given example of the implementation of the device for the provision of intelligent network services is limited to one stage of forwarding. The resources of the controller 11 and the address module 10 are able to implement two, three or more stages of forwarding, including the physical point to which the operator (telephone operator) of the switching field 1 is connected as a subscriber. In the latter case, all applications for connection in case of emergency state of the VMA trunk will be go to the operator of the switching field 1, which through specially assigned channels will provide calls to the desired subscriber.

An example implementation of a telephone 16 is shown in FIG. Based on the telephone set described in the application materials [3]. In addition to the known device according to [3], the following essential features were introduced:
the third input of the interface unit 22 is connected to the sensor 36;
the second input of the ringing unit 27 is connected to the sensor 38;
loop organization unit 33 connected in parallel with trunk 3.

 Telephone set 16 provides the formation and analysis of all service signals necessary for the organization of connections between VMA, VSCHA and redirected subscribers. The exchange of alarm messages is conducted through a separate dedicated trunk connector 4. The exchange of telephone messages is conducted through a separate dedicated telephone trunk line 3.

 The beginning of the formation of service signals from the telephone 16 begins with the raising of the MTT and the operation of the lever switch 23, according to the output signals from which service packets are transmitted through the signal shaper of the interaction 24, providing the organization of connection with the station equipment.

 The block of ringing signals 25 provides the reception of signal packets from the control connecting line 4 and the formation of the signal packet "Control call" before removing the MTT. The analyzer 27 receives telephone signals from the unit 25 and the alarm sensor 38 of the subscriber monitoring unit 17. All telephone signals through the converter 28 and the filter unit 29 are tapped by the telephone 30. When telephone is exchanged, voice information from the speech-converting unit 32 is received at the second input of the filter 29. Example the implementation of the speech-transforming unit 32 is given in the application materials [3] and in FIG. 8.

 An example implementation of a subscriber control unit 17 of its interaction with the station control unit 7 is shown in FIG. 4 and 5.

 Each connecting line 3.4 corresponds to its subscriber control unit 17 and station control unit 7.

 In the initial state, the sensor 40 generates a code sequence C1. The loop organization unit 34, when the control trunk 4 is in good condition, returns the combination C1 to the analyzer 41. The controller 11 is controlled by the controller 11 through the control register block 44, which, when the trunk 4 is in the initial state, periodically starts the timer 42.

 With a healthy connecting line 4, the timer 42 is reset by the output signals from the analyzer 41. If the code combination C1 is not passed, the timer 42 is activated and transmits information about the emergency of the connecting line 4 to the block of emergency state registers of physical points 43. A similar procedure occurs with the connecting lines 3.

 If it is necessary to establish a telephone connection, the controller 11 initiates the formation of the code combination C2 and transfers it to the subscriber control unit 17 through the block of control registers 44 using the sensor 40. With the formation of the combination C2, the timer 42 starts. The test signal analyzer 35 detects the code combination C2 through the element OR 39 interrupts the loop of the control connecting line 4 and the telephone connecting line 3 by supplying a control signal to the loop organization units 33 and 34. At the same time, the output signal from the analyzer Ora 35 will launch a test signal sensor 36, which will generate a code combination C3 and through the interface unit 22 it will transmit it to the station control unit 7. The analyzer 41 of the station control unit 7 detects the combination C3 and resets the timer 42 with the output signal.

 If the initiator of the connections is the subscriber of the telephone 16, then the signal from the output of the lever switch 23 breaks the loop of the connecting lines 3,4 by supplying this signal to the control input of the loop organization units 33,34. At the same time, a timer 37 and a test signal sensor 36 are launched, from the output of which, through the interface unit 22, along the control connecting line 4, the code combinations C2, which is detected by the analyzer 41, are transmitted to the station control side 7. The output signal from the second output of the analyzer 41 will provide the code 40 combination C3 and transmitting it to the subscriber control unit 17, where it is detected by the analyzer of test signals 35, the output of which will reset the timer 37. In the absence of combination C3, the output signal from timer 3 7 will start the emergency state sensor 38. The code sequence from the output of the emergency state sensor 38 through the telephone signal analyzer 27, the converter 28 and the filter unit 29 in the form of buzzer signals will be sent to the telephone 30, signaling the subscriber about an accident in the connecting line or station subscriber equipment.

 An example implementation of the address module 10 is shown in FIG. 6. Before starting operation, the telephone numbers of the subscribers 16 and the corresponding physical points of the switching field 1 are recorded in the memory unit 48 with the PC 14. The structure of such messages is shown in FIG. 10, and the state of the physical points in this message is marked as normal. Additionally, messages containing addresses for the forwarded telephone numbers of specially selected subscribers are recorded in the memory unit 49 with the PC 14. The structure of such a message is shown in FIG. eleven.

 During operation, the controller 11 constantly requests the state of the physical points stored in the drive 9. This state of the physical points from the drive 9 is overwritten in the memory unit 48. If the state of the physical point is normal, the value of the data recorded in the memory unit 48 does not change. If the state of the physical point is emergency, in the memory unit 48, this point is marked as emergency. Thus, by the time of the application for the organization of the connection to the controller 11, information on the state of the physical points at the current time will be stored in the memory unit 48. Upon receipt of the BMA phone number in the controller 11, the address module 10 is contacted for the state of the physical points of the switching field 1. If the state of the physical point corresponding to the requested BMA phone number is not emergency, a command will be sent from the state analyzer 50 to the controller 11 to establish a connection. If the state of the physical point is emergency, then the signal from the second output of the analyzer 50 will go to the write / read control unit 51, by the signal from which the forwarded phone number for the claimed connection will be read from the memory unit 49.

 The controller 11 (Fig. 7) is implemented in accordance with [2]. The controller 11 provides the exchange of commands with telephones 16, and the transmission / reception of commands in the computer 12 for organizing connections. The functions of the controller 11 are implemented in software. The program controlling the microcomputer 52 is stored in ROM 53. RAM 54 is intended for storing variables and intermediate data. Telephone numbers are recorded in the control register 55 and commands are generated to request the state of the physical points of the switching field 1 in the drive 9 and the address module 10. The scanner 56, through the field of scanning points 57, monitors the changes in the state of the connecting lines 3, 4 and transmits data about the changes to the microcomputer 52, and also on commands from the microcomputer 52 it generates control signals for telephones 16 and for digital computers 12 in order to organize the connection with the switching field 1.

 The switching field 1, the digital matrix switch 2, the unit for setting the connections 6, as well as the interaction of the digital computer 12 with the PC 14 and the controller 11 are implemented in accordance with [5,6]. The controller 11 can be implemented based on the microprocessor 1867 VM 1.

 The speech-converting unit 32 is intended for converting analog signals from a microphone 31 into a digital sequence and converting digital telephone information from a switching field 1 into an analog signal.

 Of the many known solutions in FIG. Figure 8 shows, for example, a speech-transforming unit as a synthesizer and analyzer of a speech signal constructed on the basis of the well-known linear prediction method described in [7]. This method provides the transmission of speech signals through low-speed channels of the tonal frequency. From the known varieties of linear prediction methods for the proposed device, a method and a device with multi-pulse excitation (MIV), which is based on the method with excitation from pulses of the fundamental tone (OT) or the LPC method, have been selected. The basis of the speech-transforming unit 32 is constituted by a transmitter 60, which provides analysis and conversion (compression) of speech, and by a receiver 66, with the functions of a synthesizer and speech restoration, at the reception.

 The LPC excitation signal is transmitted over telephone lines in the form of three parameters: the period of the fundamental tone of voiced sounds, a tone-to-noise signal that characterizes at the moment either tone or noise, and the signal amplitude (energy).

 For the period of the fundamental tone for voiced speech, the generator 63 generates excitation from several pulses, determines their location (m) and amplitude (g). The amplitude and location of the pulses is determined using the analysis through synthesis procedure.

которые затем сравниваются в вычислителе 60 с cоответствующими речевыми выборками исходного речевого сигнала Sn, поступившего на вход блока взвешивания речевого сигнала 70.When the excitation signals from the generator 63 to the input of the synthesizer 64 are created speech samples

which are then compared in the calculator 60 with the corresponding speech samples of the original speech signal Sn, received at the input of the weighting unit of the speech signal 70.

где Sn' - предсказанное значение речевого сигнала;
a_i - весовой коэффициент;
М - число коэффициентов линейного предсказания (порядок предсказания).The speech sample is predicted by a linear combination of previous reports in accordance with the expression

where Sn 'is the predicted value of the speech signal;
a _i is the weight coefficient;
M is the number of linear prediction coefficients (prediction order).

 The difference between the true Sn and the predicted Sn 'values of the speech sample determines the prediction error.

e _n = Sn-Sn '(2)
The procedure of the speech-transforming unit 32 minimizes the error between the true Sn and the predicted Sn 'values of the sample of the speech signal in accordance with the acceptable criterion used in speech studies - the standard error standard. The root-mean-square error criterion minimizes the error value e _n . Minimization of e _n is found by differentiating equation (2) and equating the derivative to zero. The minimization function e _{n is} implemented in the calculator of the cross-correlation function 72 and the calculator of the autocorrelation function 73. The location of the pulse is found when the normalized value of the cross-correlation function becomes minimal and is implemented in the pulse search unit 74. The optimal location and amplitude of the pulses is found based on the differentiation of the prediction residual power equation between true and synthesized speech.

 The root-mean-square error criterion does not take into account auditory perception, i.e. masking by a signal of a large level of a signal of a small level, for example, quantization noise. Therefore, the quantization noise should be distributed so that most of it is located at the locations of the formant areas of the speech signal, and a smaller part is between the formant areas. This requirement is met by a weighting filter 61, which suppresses noise between the formant regions in the spectrum of the speech signal and does not suppress the formant regions where it is masked by the speech signal. As a result, the interfering effect of noise in synthesized speech is reduced.

 Information about the positions m and amplitudes g of the excitation pulses is sent to the reception along with the LPC parameters. The indicated parameters are detected by the analyzer of parameters 67 at the reception, according to which in the calculator 66 the cross-correlation and autocorrelation functions are restored, and, consequently, the speech signal.

 The nodes of the speech-transforming unit 32 are implemented on the basis of TLS 320С44 CN and TMS 320с25 microcircuits.

 In the process of organizing communication, the analyzer 69 detects the value of the speed at which the speech exchange takes place. Based on the selected speed value, the operation mode of the block of reference frequencies is adjusted.

 Digital matrix switch 2 and matrix switch 18 can be assembled on the basis of LSI 1077KP1-2. The switching field control unit 19 and the connection setting unit 6 can be constructed based on the microprocessor 1867 VM 1.

 A personal computer 14 can be connected to a digital computer 12 at the junction of GOST 2 676552-87.

 Thus, the presented material allows us to conclude that it is possible to introduce operational forwarding into a known device with the consent of the caller in the event of an emergency in certain parts of the network.

Used Books
1. US patent N 54991744A H 04 M 3/42. A way to selectively place calls on hold.

 2. Patent RU N 2076459 C1, H 04 M 3/50. A device for providing intelligent network services.

 3. Application RU N 94027937/09 (027748) H 04 M 3/00 with priority 25.07.94. Digital switching system.

 4. CCITT Recommendations, Orange Book. E Series 1980

 5. Copyright certificate N 746492 G 06 F 3/04 dated 04/14/78. Switching device for computing systems.

 6. Electronic-digital switching systems, M .: Radio and communications, 1985

 7. Karataev G.A. Analysis and synthesis of a speech signal by linear prediction. Foreign electronics. 1990, N 3.

Claims (3)

 1. A device for the provision of intelligent network services, comprising a personal computer connected in series, a controller and a digital computer, connected to each other and to a digital computer through a controller bus, a connection controller, an interaction signal unit and a switching field, as well as telephone connecting lines and control lines connecting lines, characterized in that n subscriber control units, station control unit, digital matrix switch, n are introduced into it telephone sets connected to the controller bus address module, connection assignment unit, emergency drive of physical points of the switching field, the information input of which is connected to the control output of the station control unit, the first inputs and outputs of which are connected to the inputs and outputs of the interaction signal block, and the second inputs - outputs - with the first inputs and outputs of the block of coding and decoding devices, the second inputs - the outputs of which are connected to the inputs and outputs of the digital matrix switch, the signal the input input of which is connected to the output of the connection unit, each telephone set is connected through a digital matrix switch to a switching field using a telephone connecting line, and each telephone set is connected to a corresponding control input of a digital matrix switch through a subscriber control unit and control connecting line, n + 1 control input which is connected to another controller output.  2. The device according to claim 1, characterized in that each of the n telephone sets contains a keypad connected in series, a dialer and a pairing unit, the second input of which is connected to the output of the interaction driver, the input of which is connected to the output of the lever switch and the input of the ringing unit, the first output of which is connected to the input of the electro-acoustic transducer, the second output - with the second input of the interaction signal shaper, and the third output - with the input of the telephone signal analyzer, etc. than the telephone signal analyzer, the telephone signal converter, the filter unit and the telephone are connected in series, the second input of the filter unit is connected to the output of the speech-transforming unit, the first input of which is connected to the microphone, the second input to the second output of the telephone signal analyzer, and the linear input and output are connected to a telephone communication line in parallel with which a loop organization unit is connected.  3. The device according to claim 1, characterized in that each of the n subscriber control units contains a loop organization unit connected between incoming and outgoing control connecting lines, the control input of which is combined with the input of the test signal sensor, the output of which is connected to the third input of the block the telephone unit is connected, the control input of the loop organization block is combined with the control input of the telephone loop organization block, and is connected through the OR element to the output of the telephone switch apparatus and the output of the analyzer of test signals, the input of which is connected to the incoming control connecting line and the second input of the ringing unit of the telephone set, and the output to the reset input of the timer, the trigger input of which is connected to the output of the lever switch of the telephone set, and the output of the timer is connected to the input alarm sensor, the output of which is connected to the second input of the telephone signal analyzer of the telephone set.

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