RU2752010C1 - Multifunctional automatic telephone station - Google Patents

Abstract

FIELD: telecommunication systems.

SUBSTANCE: invention relates to the technique of telecommunication systems and can be used as a multifunctional automatic telephone station for organizations and institutions of various ministries and departments. The effect is achieved due to the fact that in a multifunctional automatic telephone station containing a block of subscriber lines (BSL), to the linear inputs-outputs of which subscriber lines with analog telephones at the end are connected, a switching system (SS), a control system for a station SS, a tone generator, multifrequency signaling device, integrated service digital network (ISDN) access block, call processing unit, maintenance equipment, a local area network (LAN) concentrator, an electronic computer (computer) for maintenance, a modem, an Ethernet switch, two automated workstations (AWS) for operators based on a personal electronic computer (PC), a printer, a device for checking subscriber lines (SL), measuring device, subscriber telephone terminals, terminal station equipment, clock pulse generator and digital connecting line (DSL), additionally, a switching panel, an automated workstation (AWS) of an electronic document management system (EDMS) administrator, an EDMS operator's AWP, an EDMS server, a second Ethernet switch, a firewall, a router, an optical distribution frame, a digital transmission multiplexer, a public telephone network, transmission network channels were introduced data (TN) and integrated service digital network (ISDN).

EFFECT: invention expands the functionality of the station in terms of conducting telephone communications, ensuring data transmission, exchanging electronic correspondence, increases the volume and improves the quality of services provided to subscribers.

1 cl, 1 dwg

Description

The invention relates to the technique of telecommunication systems and can be used as a multifunctional automatic telephone exchange for organizations and institutions of various ministries and departments.

Problems of providing subscribers with telephone communications in organizations and institutions are solved through the use of telephone exchanges of various purposes and capacities. For this purpose, automatic telephone exchanges are used with various principles of building switching systems, the basis of which is switching fields and their control systems.

For a long time, on public telephone networks and departmental communication networks, quasi-electronic automatic telephone exchanges (ATS KE) were used, the switching fields of which are based on magnetically controlled anchorless relays, and the control devices on electronic devices. At the same time, quasi-electronic automatic telephone exchanges differ among themselves in the way of constructing control devices. The advantage of such automatic telephone exchanges is that they can reduce the size and weight of the station equipment, reduce the area of premises required for the installation of a telephone exchange, increase the reliability and efficiency of operation, and provide a significant number of services to subscribers [1, 2]. Classic analogue telephones are used as the terminal equipment for voice transmission. One of the bottlenecks in the provision of services to a subscriber in such communication networks is the low bandwidth of subscriber lines, which includes analog telephones.

Extensive modernization of telecommunication network equipment, as well as a wide variety of terminal equipment used by the subscriber, exacerbated the problem of connecting it to the public network. This is especially true for the use of analog terminal equipment on subscriber communication lines.

The closest in technical essence to the proposed invention is the automatic telephone exchange (ATS) selected as a prototype with the functions of a digital integrated service network (ISDN) according to RF patent No. 2676262 C1 dated December 27, 2018 according to IPC Н04М 3/00, published in Bul ... No. 36 [4]. This station contains a subscriber line unit (BAL), to which subscriber lines with analog telephones at the end are connected, a switching system (CS), a station control system, a tone generator, a multifrequency signaling device, an integrated service digital network access unit (ISDN) , a call processing unit, maintenance equipment, a local area network (LAN) concentrator, an electronic computer (computer) for maintenance (TO), a modem, an Ethernet switch, two automated workstations (AWS) for operators based on a personal electronic computer (PC) ), a printer, a subscriber line (AL) tester, a measuring device, subscriber telephone terminals, terminal station equipment, a clock pulse generator and a digital trunk (DSL) to which an external automatic telephone exchange (PBX) is connected.

The aim of the invention is to expand the functionality of the station in terms of conducting telephone communications, ensuring data transmission, exchanging electronic correspondence, increasing the volume and improving the quality of services provided to subscribers.

This goal is achieved by the fact that in a multifunctional automatic telephone exchange containing a block of subscriber lines (BAL), to the linear inputs-outputs of which subscriber lines with analog telephones at the end are connected, a switching system (CS), a control system for a station CS, a tone generator , a multifrequency signaling device, an access unit for a digital integrated service network (ISDN), a call processing unit, maintenance equipment, a local area network (LAN) concentrator, an electronic computer (computer) for maintenance, a modem, an Ethernet switch, two automated workplaces (AWP) of operators based on a personal electronic computer (PC), a printer, a device for checking subscriber lines (AL), a measuring device, subscriber telephone terminals, terminal station equipment, a clock pulse generator and a digital connecting line (DSL), additional o a switching panel, an automated workstation (AWS) of an electronic document management system (EDMS) administrator, an EDMS operator's AWP, an EDMS server, a second Ethernet switch, a firewall, a router, an optical distribution frame, a digital transmission multiplexer, a public telephone network, transmission network channels were introduced data (SPN) and a digital integrated service network (ISDN), while the station inputs-outputs of the subscriber line unit are connected to the first inputs-outputs of the switching system (CS), to the first control inputs-outputs of which the first inputs-outputs of the CS control system are connected, the second inputs and outputs of which are connected to the second control inputs and outputs of the CS, the third inputs and outputs of the control system of the CS via the Ethernet interface are connected to the first inputs and outputs of the LAN concentrator, the inputs and outputs of the tone generator are connected to the first signal inputs and outputs of the CS, the inputs are outputs of the multifrequency signaling device are connected to the second signal inputs-outputs I will give a CS, the second inputs-outputs of which are connected to the station inputs-outputs of the access unit of the ISDN, to the linear inputs-outputs of which subscriber telephone terminals are connected, the third control inputs-outputs of the CS are connected to the control inputs-outputs of the call processing unit, the information inputs-outputs of which connected to the information inputs-outputs of the maintenance equipment, the control inputs-outputs of which are connected to the fourth control inputs-outputs of the CS, the first inputs-outputs of the maintenance equipment via the Ethernet interface are connected to the second inputs-outputs of the LAN concentrator, the second inputs-outputs of the maintenance equipment at the RS-232 junction are connected to the first inputs-outputs of the TO computer, the second inputs-outputs of which are connected to the third inputs-outputs of the LAN concentrator at the Ethernet interface, the linear inputs-outputs of the modem are connected to the third inputs-outputs of the TO computer, the fourth inputs-outputs of which connected via Ethernet to the first inputs-outputs mi of the first Ethernet switch, the second inputs-outputs of which are connected via the Ethernet interface to the station inputs-outputs of the modem, the third and fourth inputs-outputs of the first Ethernet switch via Ethernet joints are connected, respectively, to the first input-output of the PC AWS of the first operator and to the input-output of the PC AWS of the second operator, the second input-output of the personal computer AWS of the first operator is connected to the input-output of the printer via the USB interface, the station inputs-outputs of the switching system (CS) are connected to the station inputs-outputs of the terminal station equipment, to the signal inputs-outputs of which the inputs are connected. outputs of the clock pulse generator, the first inputs-outputs of the AL checking device are connected to the third inputs-outputs of the CC, the second inputs-outputs of the AL verification device are connected to the first inputs-outputs of the measuring device, the second and third inputs-outputs of which are connected to the inputs-outputs, respectively, of the bus measurements of subscriber lines and testing bus of the AL block of subscriber lines , linear inputs-outputs of the subscriber line unit are connected to the inputs-outputs of analog telephones, the inputs-outputs of the automated workstation (AWS) of the administrator of the electronic document management system (EDMS) are connected via the Ethernet interface to the first inputs-outputs of the second Ethernet switch, the second, third and the fourth inputs-outputs of which are connected via the Ethernet interface to the inputs-outputs, respectively, of the AWS of the operator of the electronic document management system (EDMS), the EDMS server and to the first inputs-outputs of the firewall, the second inputs-outputs of which are connected via the Ethernet interface to the first inputs-outputs of the router, the second inputs-outputs of which are connected to the second inputs-outputs of the patch panel, the third and fourth inputs-outputs of which are connected to the first inputs-outputs, respectively, of the optical distribution frame and data transmission network channels, the third inputs-outputs of the router are connected to the second inputs-outputs of the optical distribution frame, the third and fourth inputs-outputs of which are connected, respectively, to the station inputs-outputs of the digital transmission multiplexer and to the second inputs-outputs of the data transmission network channels, the linear inputs-outputs of the digital transmission multiplexer are connected to the first inputs-outputs of the digital connecting line (DSL), the second inputs-outputs of which are connected to the first inputs - the outputs of the external automatic telephone exchange, the second and third inputs-outputs of which are connected, respectively, to the inputs-outputs of the public telephone network and to the first inputs-outputs of the digital integrated service network, the second inputs-outputs of which are connected to the third inputs-outputs of the data transmission network channels.

A comparable analysis with the prototype showed that the proposed invention is distinguished by the presence of new blocks: a switching panel, an automated workstation (AWS) of an electronic document management system (EDMS) administrator, an EDMS operator's AWP, an EDMS server, a second Ethernet switch, a firewall, a router, an optical distribution frame, a digital transmission multiplexer, channels of a data transmission network (SPN), a public telephone network (PSTN) and a digital integrated service network (ISDN), as well as a change in connections between known station blocks.

Thus, the claimed multifunctional automatic telephone exchange meets the "novelty" criterion. Comparison with the prototype shows that the introduced blocks and devices are widely known and additional creativity is not required for their implementation. However, when they are introduced in this connection with the rest of the circuit elements into the claimed multifunctional automatic telephone exchange, the above blocks exhibit new properties, which leads to the achievement of the set goal.

This allows us to conclude that the technical solution meets the criterion of "significant differences".

The claimed solution does not explicitly follow from the prior art and has an inventive step.

The claimed multifunctional automatic telephone exchange can be implemented using existing equipment, blocks and nodes of telecommunication technology, computer equipment and is industrially applicable.

The drawing shows a block diagram of the proposed multifunctional automatic telephone exchange, which indicates:

1 - block of subscriber lines (AL);

2 - switching system (CS) of the station;

3 - control system of the station compressor;

4 - tone generator;

5 - multi-frequency signaling device;

6 - access unit of the integrated service digital network (ISDN);

7 - call processing unit;

8 - maintenance equipment;

9 - local area network (LAN) concentrator;

10 - electronic computer (computer) maintenance (TO);

11 - modem;

12 - the first Ethernet switch;

13 - personal electronic computer (PC) of the automated workstation (AWP) of the first operator;

14 - printer;

15 - personal electronic computer AWP of the second operator;

16 - device for checking subscriber lines (AL);

17 - measuring device;

18 - analog telephones;

19 - subscriber telephone terminals;

20 - terminal station equipment;

21 - clock pulse generator;

22 - commutation panel;

23 - automated workstation (AWS) of the administrator of the electronic document management system (EDMS);

24 - automated workstation (AWS) of the EDMS operator;

25 - EDMS server;

26 - second Ethernet switch;

27 - firewall;

28 - router;

29 - optical distribution frame;

30 - digital transmission multiplexer (MTSP);

31 - digital connecting line (DSL);

32 - external automatic telephone exchange (ATS);

33 - public telephone network (PSTN);

34 - channels of the data transmission network (DTS);

35 - digital network of integrated services (ISDN).

Station inputs-outputs of subscriber lines unit 1 are connected to the first inputs-outputs of the switching system (CS) 2, to the first control inputs-outputs of which the first inputs-outputs of the CS control system 3 are connected, the second inputs-outputs of which are connected to the second control inputs-outputs COP 2, the third inputs-outputs of the control system 3 at the Ethernet interface are connected to the first inputs-outputs of the LAN concentrator 9. The inputs-outputs of the generator 4 of the tones of the CS are connected to the first signal inputs-outputs of the CS 2, the inputs-outputs of the multifrequency signaling device 5 are connected to the second signal inputs-outputs of the CS 2, the second inputs-outputs of which are connected to the station inputs-outputs of the access unit 6 of the ISDS , to the linear inputs-outputs of which subscriber telephone terminals are connected 19. The third control inputs-outputs of the COP 2 are connected to the control inputs-outputs of the call processing unit 7, the information inputs-outputs of which are connected to the information inputs-outputs of the maintenance equipment 8, the control inputs are the outputs of which are connected to the fourth control inputs-outputs of the CS 2. The first inputs-outputs of the maintenance equipment 8 via the Ethernet interface are connected to the second inputs-outputs of the LAN concentrator 9, the second inputs-outputs of the maintenance equipment 8 via the RS-232 interface are connected to the first inputs - the outputs of the TO 10 computer, the second inputs-outputs of which at the junction E thernet are connected to the third I / O of the 9 LAN hub. Linear inputs-outputs of the modem 11 are connected to the third inputs-outputs of the computer TO 10, the fourth inputs-outputs of which are connected via the Ethernet interface to the first inputs-outputs of the first Ethernet switch 12, the second inputs-outputs of which are connected via the Ethernet interface to the station inputs-outputs of the modem 11. The third and fourth inputs-outputs of the first Ethernet switch 12 via Ethernet joints are connected, respectively, to the first input-output of the personal computer 13 AWS of the first operator and to the input-output of the PC 15 AWS of the second operator, the second input-output of the PC 13 AWS of the first operator at the interface USB is connected to the input-output of the printer 14. The first inputs-outputs of the device 16 for checking subscriber lines (AL) are connected to the third inputs-outputs of the switching system 2, the second inputs-outputs of the device 16 for checking the AL are connected to the first inputs-outputs of the measuring device 17, the second and the third inputs-outputs of which are connected to the inputs-outputs, respectively, of the measurement bus of subscriber lines and the AL testing bus block 1 of subscriber lines, linear inputs-outputs of block 1 of subscriber lines are connected to the inputs-outputs of analog telephones 18. Station inputs-outputs of switching system 2 are connected to station inputs-outputs of terminal station equipment 20, to the signal inputs-outputs of which signal inputs are connected - the outputs of the clock pulse generator 21, the linear inputs-outputs of the terminal station equipment 20 at the junction E1 are connected to the first inputs-outputs of the switching panel 22. The inputs-outputs of the automated workstation (AWS) of the administrator 23 of the electronic document management system (EDMS) are connected to the first inputs; outputs of the second Ethernet switch 26, the second, third and fourth inputs-outputs of which are connected via the Ethernet interface to the inputs-outputs, respectively, AWP 24 of the operator of the EDMS, the server 25 of the EDMS and to the first inputs-outputs of the firewall 27, the second inputs-outputs of which are via the Ethernet interface connected to the first inputs-outputs of the router 28, the second inputs-outputs of which are connected to the second inputs-outputs of the patch panel 22, the third and fourth inputs-outputs of which are connected to the first inputs-outputs, respectively, of the optical distribution frame 29 and channels 34 of the data transmission network. The third inputs / outputs of the router 28 are connected to the second inputs / outputs of the optical distribution frame 29, the third and fourth inputs / outputs of which are connected, respectively, to the station inputs / outputs of the digital transmission multiplexer 30 and to the second inputs / outputs of the channels 34 of the data transmission network. Linear inputs-outputs of the digital transmission multiplexer 30 are connected to the first inputs-outputs of the digital connecting line (DSL) 31, the second inputs-outputs of which are connected to the first inputs-outputs of the external automatic telephone exchange 32, the second and third inputs-outputs of which are connected respectively to the inputs-outputs the public telephone network 33 and to the first inputs-outputs of the integrated service digital network 35, the second inputs-outputs of which are connected to the third inputs-outputs of the channels 34 of the data transmission network.

Block 1 of subscriber lines (AL) is designed to connect subscriber lines to the switching system (CS) of the station 2, perform analog-to-digital conversion of the voice signal of an analog subscriber and coordinate the subscriber signaling with the station signaling system.

Block 1 of subscriber lines contains n subscriber sets (AK), each of which includes several subscriber lines (AL), and a subscriber signaling coprocessor. The subscriber signaling coprocessor is designed to work with conventional subscriber sets. It is also possible to connect payphones instead of conventional subscriber sets (AK).

Each subscriber set provides power to the microphone circuit of the analog telephone 18, the supply of a ringing signal towards the telephone and the transmission of voice signals of the subscribers. The AC board contains the individual subscriber equipment of subscribers, control devices and a PCM signal receiver.

In the subscriber equipment of block 1 of subscriber lines, the load is concentrated and transferred to the switching system 2 via PCM lines with a transmission rate of 2 Mbit / s. Moreover, each PCM line includes 30 talk time slots and one time slot for signaling between unit 1 and the central processor of the control system. The control functions carried out in the station in real time are performed by the subscriber signaling coprocessor. The subscriber signaling coprocessor is designed to work with conventional subscriber sets, it is possible to connect up to eight payphones instead of conventional subscriber sets (AK). The coprocessor is designed to control the subscriber equipment components and ensure their interaction.

Switching system 2 is a fully digital system with time division of channels and contains a digital switching field with a capacity of n × n channels, in which the input-output of any station-side channel is available to the input-output of any channel of the linear side.

Switching system 2 performs the functions of switching incoming and outgoing channels with each other in accordance with instructions from the call processing unit 7. Connection to switching system 2 is carried out via pulse-code modulation (PCM) lines with a transmission rate of 2 Mbit / s. In addition to talk time slots, the switching system carries out switching of signaling channels and intra-office data transmission channels.

The operation of the switching system 2 is controlled by the control system 3 of the CC, which includes a central processor (CPU), which plays the role of the main control device of a multifunctional automatic telephone exchange, and an internal signaling coprocessor (SP).

An internal signaling coprocessor (SP) provides a bi-directional interface between the central processor and the PCM lines. In this case, the central processor writes the transmitted message into the two-port transmission random access memory (RAM), and the internal signaling coprocessor reads it, processes it and transmits it to the PCM line.

For its part, the coprocessor at the reception analyzes the information coming from the PCM lines and, having found a new message, checks its correctness. The coprocessor then transmits the message to the central processor, writing it to the dual-port receive RAM.

The central processor is based on a 16-bit INTEL microprocessor with a clock frequency of 33 MHz.

In addition to the microprocessor, the central processor includes a random access memory (RAM) of a dynamic type with a volume of 16 Mbytes and a reprogrammable read-only memory (PROM) with a capacity of 2 Mbytes, two serial interfaces compatible with an RS-232 interface for connecting service terminals, as well as a coprocessor digital signaling and line signaling coprocessor. In this case, the digital signaling coprocessor is designed to receive and transmit channel signaling in accordance with the common channel signaling protocol # 7 (OCS # 7) and with the EDSSI protocol, and the line signaling coprocessor receives, processes and transmits the line signaling over the signal channel. Depending on the signaling method, the signaling may contain, in addition to line signals, also control signals.

The control system 3 of the switching system 2 is designed to turn on subscriber and trunk lines, switch incoming and outgoing channels with each other, process calls and conduct technical operation of the automatic telephone exchange.

Control functions are carried out in the station in real time. These functions are performed by the subscriber signaling coprocessor. It is designed to control the subscriber equipment components and ensure their interaction.

The tone generator 4 is designed to generate tone frequency signals used in the connection establishment system in the form of ringing tones and the station's response to the incoming connection establishment request. The tone generator generates the required acoustic signals, such as: station answer, busy tone, indicator tone, ring back tone, intrusion, notification, busy on overload.

The multifrequency signaling device 5 is designed to recognize the multifrequency signals used in inter-office signaling and to inversely convert to create the desired multifrequency signals.

In the receiving direction, the multifrequency signaling device 5 converts the multifrequency code signals used in the inter-office signaling into a digital form that can be read by the internal signaling coprocessor. In the direction of transmission, the multifrequency signaling device 5 converts the digits into multifrequency signals. When the device operates in the multifrequency signaling mode, one path is capable of simultaneously processing signaling associated with the establishment of up to thirty-two connections.

The device 5 is used as a receiver and transmitter of multi-frequency signals "2 out of 6" required for establishing connections, as well as a device for requesting and receiving equipment for determining the number of subscribers (ANI).

The device 5 is connected to the switching system 2 by two intra-office PCM lines. One line transmits data on control and recognition of incoming signals between interacting devices, and on the other line - tone signaling between the multifrequency signaling device 5 and connecting or subscriber lines.

Block 6 access ISDN is a digital subscriber equipment ISDN (Integrated Services Digital Network). ISDN subscriber access equipment is always placed in a separate cassette. This equipment includes: secondary power supply, ISDN subscriber line power supply and independent ISDN equipment modules.

Each of the modules contains thirty-two accesses with different interfaces. ISDN contains 2B + D basic access line transceiver kits.

The call processing unit 7 contains a central processor, which is connected to other station equipment by means of a high-speed standardized bus of the DMC86 type and controls the operation of the station switching system.

The call processing unit 7 performs the following main functions:

management of the switching system and control over it, performing the functions of testing, connecting and disconnecting;

subscriber load management, call cost accounting and subscriber signaling management;

station signaling control;

reception, processing and transmission of signaling via the signaling channel;

control of general channel signaling of PCM lines;

management of subscriber data, data on tariffication, signaling, routing and station configuration;

collection of accounting information and measurement results of teletraffic, monitoring of the state of the load on the station, as well as the management of various operational counters and error counters.

Maintenance equipment 8 consists of the following modules: a central processor, a terminal kit control device, an alarm and manual control device, a serial interface adapter and a special subscriber kit.

With the help of an internal signaling coprocessor, the maintenance equipment 8 controls the operation of the automatic telephone exchange and carries out its tests. The maintenance equipment 8 is connected to the switching system by 2 lines with a transmission rate of 64 kbit / s. The internal signaling coprocessor is also used to transfer messages between the equipment 8 and the call processing unit 7. With the help of the terminal kit monitor, the maintenance equipment 8 monitors the error rate on the PCM lines when channel-by-channel signaling is applied to them. The control device is connected to the switching system by 2 lines with a transmission rate of 2 Mbit / s.

Maintenance equipment 8 is a computer for technical operation and is a link of the interface between the user and the station. Through block 8 and computer 10 of technical maintenance (TO), the user can make changes to the files of the RAM of the central processor, start tests and traffic measurements. If necessary, block 8 automatically starts the execution of measures to restore the configuration and programs for diagnostics of malfunctions.

Maintenance and technical operation of the station is carried out using equipment 8 for maintenance, computer 10 for maintenance, modem 11, first Ethernet switch 12, personal computer 13 AWP of the first operator, printer 14 and PC 15 AWP of the second operator.

The concentrator 9 of the local area network (LAN) is intended for branching the users of the local area network.

Electronic computer (computer) 10 maintenance is an industrial computer and provides the following functions:

synchronization of the operation of individual devices in the main and backup group equipment;

translation of messages and commands between the peripheral equipment of the control room and the computer for technical operation;

initial loading of software into micro-computers of individual devices;

testing of individual devices;

support for remote access;

storage of station data and their accumulation of statistical information;

backup support.

To ensure the reliability of the automatic telephone exchange, the main maintenance computer 10 is duplicated with a similar composition and design of the maintenance back-up computer. In the normal mode, the connecting cables are connected to the main computer TO 10. The backup computer TO is connected to the internal network (LAN) via the Ethernet interface, while periodical copying of information from the main computer TO 10 to the backup one is provided.

The computer 10 for maintenance via the Ethernet interface through the first Ethernet switch 12 interacts with the operators' workstations, organized on the basis of two PCs: PC 13 workstation of the first operator and PC 15 workstation of the second operator.

Structurally, the computer 10 TO is an industrial (industrial) personal electronic computer R4-506. This computer includes an Intel Pentium 4 506 processor with a frequency of 2.66 GHz, two 80 GB hard disks, 512 MB random access memory (RAM), a DVD-CD RW external drive (drive), a LAN connector for connecting to the Internet, RS-232 connector, Windows XP operating system with special Russified software, and Philips 170 LCD monitor.

Modem 11 is intended for operators to leave the station workstations via channels to external automatic telephone exchange 23.

Modem 11 can be a Robotics Courier V.Everything Corporate Modem model 3453.

The first Ethernet switch 12 is intended for organizing a local area network (LAN) between operators' workstations and other elements of a multifunctional automatic telephone exchange. As the Ethernet switch 12, a desktop Gigabit Ethernet switch with five or eight ports can be used.

Personal computers 13 and 15 are used as an interface between the user and the PBX, through which the user can perform both normal maintenance functions (for example, entering MML directives) and testing blocks. As personal computers for AWPs of the first 13 and second 15 operators, a personal computer of the P4-506 type, which has an Intel Pentium processor, can also be used.

Printer 14 is designed to print out alarms and reports (for example, reports on monitoring subscribers) and other operational information. The specified printer 14 is connected to the PC 13 AWP of the first operator. As the aforementioned printer 14, a laser printer of the HP Laser Jet 1020 type can be used.

The device 16 for checking subscriber lines (AL) provides the following functions: control of the operation of the measuring device 17 and preliminary processing of measurement results, monitoring the health of station (or remote) secondary power supplies and an inductor call generator, organizing information exchange via PCM lines with a serial interface adapter and organization of information exchange at the RS-232 interface with a service terminal (PC). The algorithm of individual measurements and operations is carried out in the device 16 by commands from the operator or from the computer TO 10 automatically during preventive measurements and checks.

The measuring device 17 is designed to measure the parameters of subscriber lines (AL) and test subscriber sets (AK). It operates under the control of a subscriber line checker 16.

The subscriber line and the subscriber set (AC) are connected to the measuring device 17 through the station-wide measurement bus and the subscriber line (AL) testing bus. Connection is carried out in the corresponding subscriber set by command from the subscriber signaling coprocessor.

In the direction of the subscriber line, the measuring device 17 performs the following functions: measurement of direct and alternating voltages on the wires of the subscriber line relative to "ground", measurement of insulation resistance, testing for open circuit, making control calls and measuring the parameters of dialer pulses.

In the direction of the station, the measuring device 17 performs testing of the subscriber set.

Any telephone set can be used as an analog subscriber set 18, for example, a telephone set of the TA-72 type with a rotary dialer or a Panasonic TA-type model NKX-TS2350 with a push-button dialer.

As a subscriber telephone terminal 19, a digital telephone set of the CENSET Advanced type with a prefix with a keyboard, manufactured by ISKRATEL, can be used.

Terminal station equipment 20 station performs the following functions:

receiving a signal from the PCM line;

signal transmission to the PCM line;

buffering the signal received from the PCM line to eliminate jitter in it;

reception and transmission of the E1 stream to the digital connecting line 22.

The clock generator 21 generates for the clock amplifiers the main clock signals with frequencies of 16 MHz and 8 kHz either independently or in synchronism with the 2.048 MHz clock signal, which is extracted from the PCM signal coming from the higher station hierarchical level of the terminal station equipment 20.

Patch panel 22 is designed to connect the equipment of the data transmission network to the equipment of the automatic telephone exchange and provide access to the channels of the public telephone network.

The automated workstation (AWS) of the 23 EDMS administrator is a complex of software and hardware modules that ensure the formation of files of the established format, verification of the correctness of information, performance of cryptographic functions, sending and receiving electronic documents. To add to the functionality of several levels of users of the workstation of the local area network, the administrator of the EDMS programmatically opens access to the menu items. It was performed using a personal computer based on Intel Pentium IV × 2 with at least 4 Gb of RAM.

The automated workstation (AWS) of the 24 EDMS operator is a complex of software and hardware modules that provide the formation of files of the established format, verification of the correctness of information, performance of cryptographic functions, sending and receiving electronic documents. It is also performed using a personal computer based on Intel Pentium IV × 2 with at least 4 Gb of RAM.

Server 25 EDMS is one of the main elements in the structure of the electronic document management system. It is designed to perform the necessary operations with documents and information. It contains the database of the document management system. The software (software) of the EDMS includes functional (information management and processing), administrative (provides the necessary system settings) and interface (presentation of information and data in a form accessible to end users) parts. The server 25 can be a WinServer 2008 R2 server.

The second 26 Ethernet switch is designed to organize access to the intra-office local area network (LAN), provide access to external LAN channels and organize the exchange of electronic correspondence between local and remote users, as well as between operators' workstations and other elements of an automatic telephone exchange. A Mox-type Ethernet switch can be used as an Ethernet switch 26.

As a firewall 27, a firewall of the "Factor TS" type can be used.

Router 28 is an Ethernet Switch type switch designed to organize subscribers' access to the formed local computer network and provide data transmission over it over the Ethernet 100 Base-TX interface between the workstations of officials, through channels and communication lines. It supports IPv4 (RFC 791), supports static routing of IP packets, and supports dynamic routing BGPv4 (RFC 4271).

An industrial Ethernet switch of the KTM-1373 type, developed by OJSC Morion (Perm), which is a packet data transmission equipment designed for building technological and dedicated data transmission networks, as well as industrial local computer networks, can be used as a router 28. ...

Optical distribution frame 29 is designed to build a cable system using fiber-optic communication lines. Optical distribution frame 29 is a metal or plastic box, the front part of which has sockets for optical adapters, and the opposite side is equipped with cable connecting elements for reliable attachment to the distribution frame. It is designed for distribution and switching of optical fibers and circuits.

The digital transmission multiplexer 30 is an optical multiplexer of the 1st level of the new generation SDH systems, such as МЦП-155, capable of integrating the services of traditional telecommunications and the Internet. It has a modular architecture and in its design is used as a terminal multiplexer for 63 × 2 Mbit / s component streams and provides transport of 2, 34 Mbit / s or 45 Mbit / s streams and Ethernet signals. In this case, the transmission rate of the group stream is 155.52 Mbit / s.

The digital connecting line 31 is made using an optical cable of the INTEGRA-Cable brand of the IKSL-T-A16-2.5 type.

The external automatic telephone exchange 32 is intended to ensure the exit of officials and subscribers included in the proposed multifunctional automatic telephone exchange through the digital connecting line 31 and through the channels 34 of the data transmission network to the public telephone network 33 and the digital network 35 of the integrated service (ISDN). ATSTS-90 station can be used as an external automatic telephone exchange.

The proposed multifunctional automatic telephone exchange operates as follows.

The offered multifunctional automatic telephone exchange is intended for automatic switching of subscriber (AL) and connecting (SL) communication lines. The proposed automatic telephone exchange uses digital switching equipment (switching field) with space-time division of channels. It provides the establishment of connections with subscribers of other automatic telephone exchanges and PBXs within the public communications network and the digital integrated service network (ISDN).

The station provides interaction with various types of analog transmission systems and physical connecting lines (SL), which are currently used in communication networks in Russia and the CIS, for which the station uses equipment for interfacing with connecting lines, which provides for the coordination of electrical characteristics of the station with transmission systems and the necessary conversion of signaling.

The station provides the possibility of organizing intra-industrial telephone communication on communication networks, the exit of station subscribers to the public telephone network (PSTN), restriction for some subscribers to access the PSTN network with the provision of calling emergency services using standard abbreviated numbers, the organization of a document exchange point, data exchange and email correspondence.

A multifunctional PBX supports the connection of the following types of subscriber terminals: telephones with pulse dialing (disk or keypad with line power), telephones with frequency dialing, payphones, telephones for remote subscribers with a maximum loop resistance of 3800 Ohm, modems and fax modems for dial-up lines, fax machines and integrated service digital network (ISDN) terminals.

The station is characterized by a decentralized modular structure. Decentralization of the structure improves reliability and provides ease of management. Modularity allows additional functions to be introduced as required, for example, integrated mode digital network (ISDN) functions or others.

The digital connecting line 31 with a transmission rate of 2 Mbit / s is included in the switching system by means of terminal station equipment 20, which performs the necessary coordination, synchronization and transmission control.

The technical operation and maintenance of the proposed PBX can be performed separately or centrally from the operator's workplaces and are designed to connect several PBXs.

Numerous signaling methods, a decentralized modular structure, centralized plant maintenance and automated maintenance functions ensure reliable plant operation throughout its long operating life.

When a station is included in a digital station of a higher hierarchy, it works in a synchronous mode according to the principle of hierarchical synchronization, using a station of a higher hierarchy as a master station, a central (base) or a nodal station. Synchronization from the master (base) station is carried out via the PCM line, which is used to exchange telephone messages.

When a station is connected to an analog station, it operates in a plesiochronous mode without external control, generating its own clock frequency. At the same time, in addition to the main station equipment, with the clock frequency generated by the clock synchronization system of the station, the equipment of the connecting line (SL) built into the station is synchronized, with the help of which it is interfaced with the surrounding analog network.

A number of maintenance functions have their own directives entered from the display, which can be entered using the menu method, instruction texts and entering parameters in a clear dialog form.

The technical operation system in the station is a single set that does not need external measuring devices. Maintenance functions are automated so that the station can continue to operate without the intervention of operating personnel.

The station provides ISDN subscribers with two basic, recommended by ITU-T, access structures:

main access, which looks like 2B + D;

primary speed access in the form 30B + D.

The main access is provided to subscribers using the subscriber digital equipment (ISDN).

Station access at primary speed does not require this equipment. An exception is the case when the subscriber digital equipment itself is taken out of the station and connected to it at the primary speed as a subscriber load.

For both accesses, channel B is a 64 kbit / s full-duplex digital channel exclusively for the transmission of user information.

Channel D is a duplex digital channel for transmission of service (including signaling) user information. Channel D speed is 16 kbit / s in the main access and 64 kbit / s in the primary access.

A station with an ISDN function in a minimal modular design has a digital subscriber capacity of up to 32 basic accesses. The number of joints inside this container is variable and each of them is a multiple of eight.

Primary rate access uses the same digital signaling methods as inter-office communications. The parameters of this access are regulated by ITU-T Rec. ITU-T G.703, G.704.

The ISDN subscriber equipment of the station itself, removed from it and installed in the place where the ISDN subscribers are concentrated, or any PBX with ISDN functions can be used as a subscriber unit connected to the station with access at a primary rate.

To operate in the ISDN network, the station uses the USUP subsystem of the OKS No. 7 signaling system for inter-office communications and the EDSSI signaling system with primary rate access at the user-network interface. Signaling system OKS No. 7 is based on three levels of MTP and includes both the functions of an end point and a signaling transit point.

The serial interface adapter is intended for buffering, primary processing and routing of messages transmitted between different station modules connected to the adapter via the corresponding interfaces. The adapter is connected with the DMC86 bus interface to the central processor of the control system 3 of KS 2, the PCM-30 interface is connected to the adapter with the switching system 2. The computer TO 10 is connected with the help of the Ethernet interface.

The initial loading of the operating system and control programs into the adapter is carried out using the BOOTP protocol from the hard disk of the TO 10 computer via the Ethernet interface. In the future, this interface is constantly monitored with an exit from the operating mode if the messages addressed to the adapter do not arrive within a specified time interval.

A return to operating mode occurs upon receipt of the first message addressed to the adapter and is followed by reinitialization of the adapter hardware and software.

In the computer TO 10 and the PC of the workstation of the station operators, software (software) is used, which is divided into software for station maintenance and software for technical operation. At the same time, the software for technical operation includes the software of the personal computer of the operator's workplace (RM) and the software of the computer for technical maintenance. The maintenance software is designed to provide control of the station by means of directives entered by the operators of the personal computer AWP of the first 13 and second 15 operators.

The station software is an executable code written in a reprogrammable read-only memory (EPROM), and the maintenance software is stored on PC disks of workstations in the form of sets of executable files and data files.

The maintenance software performs the following functions:

control over the correctness of the data management directives entered by the operator into the station;

execution of the directives entered by the operator by sending a request to the station and processing the received request;

displaying the results of the execution of directives on the PC screen of workstations.

The proposed automatic telephone exchange with the functions of the ISDS uses the MMI system (Man Machine Interface), which is a specific set formed by software and peripheral devices, with which the operator can perform the functions of technical operation. The software uses the TERM.EXE program.

The types of communication provided in the proposed PBX include:

1) intra-office communication;

2) outgoing external communication;

3) incoming external communication;

4) transit communication;

5) data transmission;

6) organization of an exchange point for documentary information and electronic correspondence;

7) additional types of services.

Intra-office communication is carried out between subscribers included in the proposed automatic telephone exchange. In this case, the connection is established through the stage of the subscriber search of the switching system 2 of the station.

Outgoing and incoming external communications are carried out between subscribers included in the proposed automatic telephone exchange and subscribers of other stations of the public communication network, including via a digital connecting line from external automatic telephone exchange 32. In this case, the connection is established through the stages of subscriber and group search of the switching system 2 of the station.

A feature of transit communication is that it is carried out through the stages of subscriber and group search of several interacting stations, including the proposed automatic telephone exchange and similar stations of the public telephone network.

The procedure for establishing a connection and maintaining these connections may be different depending on the category of interacting subscribers, on the type of terminal means of communication used (the type of subscriber devices and subscriber telephone terminals used) [2, 3].

Additional types of services in the station include: loudspeaker communication using a broadcast amplifier, output to a dictaphone, radio communication through a radio station, search signaling.

Along with the basic services for establishing a connection between subscribers, the proposed multifunctional automatic telephone exchange has a number of additional services, such as basic access to an integrated service digital network (ISDN), in which communication is carried out via digital channels at a rate of 64 kbps and channels at a rate of 16 kbps. , operator services (reference and information services, manual connection establishment, operator assistance, etc.), abbreviated dialing, connection without dialing a number (direct communication), repeated calls without dialing a number, prohibition of incoming and outgoing communications, access to a long-distance network via code-password, call forwarding, notification of a new call, inquiry during a call, conference call of three subscribers, identification of the calling subscriber's number at the request of the called subscriber, selection of a long-distance / international operator.

The proposed multifunctional automatic telephone exchange also provides the following types and modes of operation for organizing the exchange of data and electronic correspondence:

1) organization of an exchange point for documentary information according to the "client-server" scheme with the provision of interaction with automated workstations (AWS) of the administrator 23 of the electronic document management system (EDMS) and the operator of the 24 EDMS and subscriber telephone terminals of 19 officials via the Optical Ethernet and El interfaces with using the TCP / IP stack;

2) implementation of a secure interaction scheme between client and server equipment (server 25 of the EDMS) of the electronic document management system of point-to-multipoint (or “star”) topology using the second 26 Ethernet switch and a firewall software and hardware complex (27);

3) deployment of a subscriber network of documentary data exchange using the second Ethernet switch 26 and the automated workstation 23 of the EDMS administrator;

4) data transmission according to the "client-server" scheme with the possibility of binding through optical distribution frame 29, multiplexer 30, digital connecting line 31 and external automatic telephone exchange 32 to the public telephone network 33 based on aggregation of Ethernet frames into STM-1 streams of a synchronous digital hierarchy with speed up to 155 Mbit / s;

5) data transmission via channels 34 of the PD network with the possibility of output through the optical distribution frame 30 and channels 34 of the data transmission network to the digital network 35 of the integrated service (ISDN) and through the latter to the public telephone network 33;

6) multiplexing, channeling and switching digital channels using a digital transmission multiplexer 30;

7) routing and firewalling of packets using a DIONIS-NX type firewall 27 and a router 28 with a border gateway function based on the Juniper SRX-240 BGP protocol;

8) provision of documented communication services, including electronic correspondence exchange services and electronic document management services;

9) exchange of electronic correspondence between officials and / or applied processes of information in electronic form, pre-arranged in the form of one or more information objects (documents, files).

In this case, the process of electronic document management is organized as follows.

Information in electronic form is generated in the form of a message (document, file) by the user of the AWS of the operator 24 of the EDMS and / or the subscriber telephone terminal 19. The generated message is transmitted to the server 25 of the EDMS via the Ethernet interface with a Fiber Channel interface in a single local area network (LAN) built using a second 26 Ethernet switch. Pre-processing of electronic messages before sending and updating the database is carried out by the server 25 EDMS. The formed aggregated stream from the line output of the second Ethernet switch 26 via the Ethernet interface is fed to the border router 28. The functions of protection against external destructive software influences are implemented by the firewall 27, which filters the IP packet traffic according to the configuration. The binding of the organized local area network of the EDMS to the public telephone network 33 is carried out using a router 28 based on the dynamic routing protocol (BGP) and a multiplexer 30 of a synchronous digital hierarchy (SDH) with the possibility of circuit switching, aggregation of low-level E1 channels of the plesiochronous digital hierarchy (PDH) and Ethernet frames into STM-1 transport containers.

The technical effect of the proposed invention is to expand the functionality of the station in terms of conducting telephone communications, ensuring data transmission, exchanging electronic correspondence, increasing the volume and improving the quality of services provided to subscribers, increasing the reliability of the station, achieved by maintaining constant automatic monitoring of the state of the station equipment, measurement and control of parameters of subscriber and trunk lines, data network channels connected to the automatic telephone exchange, the use of a decentralized modular structure, centralized technical operation of the station and automation of maintenance functions, which ensure reliable operation of the station throughout its long term of operation.

In addition, the proposed multifunctional automatic telephone exchange provides for operation both on analog subscriber lines and digital communication lines using telephones with pulse dialing (disk or keypad with line power), telephones with frequency dialing, payphones, telephones for remote subscribers. , modems and fax modems for dial-up lines, facsimile machines and terminals of the integrated service digital network (ISDN), as well as improving the quality of communication services provided to subscribers, including reducing connection setup time, providing information about the arrival of a new call during communication, pointing inquiries during a conversation, conference calls of three subscribers, identification of the calling subscriber's number at the request of the called subscriber, as well as the organization of a document exchange point with the ability to access the public telephone network and the digital integrated service network (ISDN).

Sources of information

1. Military switching systems and telephony. B.A. Gordienko, V.N. Filippov, L.P. Shcherbina / Ed. B.A. Gordienko. - YOU, 1984.

2. T.I. Ivanova. Subscriber terminals and computer telephony. -M .: Eco-Trends, 1999.

3. Switching equipment for office-production quasi-electronic automatic telephone exchanges "QUANT", decimal number PPO. 122.201 TU, 1983.

4. RU, patent No. 2676262 C1, IPC H04M 3/00, Bull. No. 36, 12/27/2018 (prototype).

Claims (1)

Multifunctional automatic telephone exchange, containing a block of subscriber lines (BAL), to the linear inputs-outputs of which subscriber lines with analog telephones at the end are connected, a switching system (CS), a control system of the station CS, a tone generator, a multifrequency signaling device, an access unit integrated service digital network (ISDN), a call processing unit, maintenance equipment, a local area network (LAN) concentrator, an electronic computer (computer) for maintenance, a modem, an Ethernet switch, two automated workstations (AWS) for operators on based on a personal electronic computer (PC), a printer, a device for checking subscriber lines (AL), a measuring device, subscriber telephone terminals, terminal station equipment, a clock pulse generator and a digital connecting line (DSL), characterized in that it additionally includes com mutation panel, automated workstation (AWS) of the administrator of the electronic document management system (EDMS), AWS of the EDMS operator, EDMS server, second Ethernet switch, firewall, router, optical distribution frame, digital transmission multiplexer, public telephone network, data transmission network channels ( SPD) and a digital integrated service network (ISDN), while the station inputs-outputs of the subscriber line unit are connected to the first inputs-outputs of the switching system (CS), to the first control inputs-outputs of which the first inputs-outputs of the CS control system are connected, the second inputs - the outputs of which are connected to the second control inputs and outputs of the CS, the third inputs and outputs of the CS control system are connected via the Ethernet interface to the first inputs and outputs of the LAN concentrator, the inputs and outputs of the tone generator are connected to the first signal inputs and outputs of the CS, the inputs and outputs of the device multifrequency signaling are connected to the second signal inputs-outputs of the COP, the second e inputs-outputs of which are connected to the station inputs-outputs of the access unit of the ISDS, to the linear inputs-outputs of which subscriber telephone terminals are connected, the third control inputs-outputs of the CC are connected to the control inputs-outputs of the call processing unit, the information inputs-outputs of which are connected to the information the inputs-outputs of the maintenance equipment, the control inputs-outputs of which are connected to the fourth control inputs-outputs of the CS, the first inputs-outputs of the maintenance equipment via the Ethernet interface are connected to the second inputs-outputs of the LAN concentrator, the second inputs-outputs of the maintenance equipment via the RS interface -232 are connected to the first inputs-outputs of the TO computer, the second inputs-outputs of which are connected via the Ethernet interface to the third inputs-outputs of the LAN concentrator, the linear inputs-outputs of the modem are connected to the third inputs-outputs of the TO computer, the fourth inputs-outputs of which are via the Ethernet interface connected to the first inputs-outputs of the first ko of the Ethernet switch, the second inputs-outputs of which are connected via the Ethernet interface to the station inputs-outputs of the modem, the third and fourth inputs-outputs of the first Ethernet switch via Ethernet joints are connected, respectively, to the first input-output of the PC AWS of the first operator and to the input-output of the PC AWS of the second operator, the second input-output of the personal computer AWS of the first operator is connected via the USB interface to the input-output of the printer, the station inputs-outputs of the switching system (CS) are connected to the station inputs-outputs of the terminal station equipment, to the signal inputs-outputs of which the generator inputs-outputs are connected clock pulses, the first inputs-outputs of the AL checking device are connected to the third inputs-outputs of the CC, the second inputs-outputs of the AL verification device are connected to the first inputs-outputs of the measuring device, the second and third inputs-outputs of which are connected to the inputs-outputs, respectively, of the subscriber measurement bus lines and buses of testing AL block of subscriber lines, line inputs dy-outputs of the block of subscriber lines are connected to the inputs-outputs of analog telephones, the inputs-outputs of the automated workstation (AWS) of the administrator of the electronic document management system (EDMS) are connected via the Ethernet interface to the first inputs-outputs of the second Ethernet switch, the second, third and fourth inputs - the outputs of which are connected via the Ethernet junction to the inputs-outputs, respectively, of the AWS of the operator of the electronic document management system (EDMS), the EDMS server and to the first inputs-outputs of the firewall, the second inputs-outputs of which are connected via the Ethernet junction to the first inputs-outputs of the router, the second inputs - the outputs of which are connected to the second inputs-outputs of the switching panel, the third and fourth inputs-outputs of which are connected to the first inputs-outputs, respectively, of the optical distribution frame and data transmission network channels, the third inputs-outputs of the router are connected to the second inputs-outputs of the optical distribution frame, the third and the fourth inputs-outputs of which are connected with Responsibly to the station inputs-outputs of the digital transmission multiplexer and to the second inputs-outputs of the data transmission network channels, the linear inputs-outputs of the digital transmission multiplexer are connected to the first inputs-outputs of the digital connecting line (DSL), the second inputs-outputs of which are connected to the first inputs- the outputs of the external automatic telephone exchange, the second and third inputs-outputs of which are connected, respectively, to the inputs-outputs of the public telephone network and to the first inputs-outputs of the digital integrated service network, the second inputs-outputs of which are connected to the third inputs-outputs of the data transmission network channels.

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