RU79222U1 - SYSTEM OF INTER-OBJECT COMMUNICATION - Google Patents

Abstract

The in-house communication system belongs to the field of radio engineering and can be used to organize in-house speaker and telephone communications, as well as for data transmission. The technical result achieved is to expand the functionality and reduce the range of devices while reducing the linear cable network, which is achieved through an additional introduction to CC system, which connect fiber optic links between themselves, and switchboards and consoles, cabin and cut-off units are connected to them loudspeakers broadcast blocks and blocks of subscriber lines telephones. CCs contain N transceiver and subscriber modules connected to the main and backup control buses and other information and control buses, while the switches and consoles contain a microcontroller that is connected to a switching device, transceiver, indicator and control circuitry, which is connected to the keyboard and voltage converter to which the terminal amplifier is connected, and electro-acoustic transducers are connected to the amplifier output, and the output of the switch is connected to different CCs, and riemoperedatchik with bus "B2" .3 yl.

Description

This utility model relates to the field of electro-radio engineering and can be used to organize in-house speakerphone and telephone communications.

It is known "Device speakerphone two-wire duplex communication", A.S. USSR No. 568210, cl. H04M 9/08.

The device contains an electronic switch, a microphone, a loudspeaker, a transmission and reception amplifier, a control pulse shaper, a low-pass filter, a modulator, a demodulator, and other elements that form the receiving and transmitting paths.

However, a disadvantage of the analogue is the low noise immunity of the switches, the dependence of the quality of information transfer on the length of the subscriber line, and a large hardware and cable redundancy.

The prototype of the claimed system is "Unified marine equipment for loud-speaking communication and broadcasting" Rowan ", ID1.203.028TO, 1971. The equipment is designed to provide loud-speaking communications and broadcast command and broadcast transmissions on ships of the sea and river fleets. Instrumentation devices allow you to create various communication schemes, for example, a duplex speakerphone (GHS) scheme between switches in 1, 3, 5, 10 and 20 directions, a simplex GHS circuit, a circular communication circuit, etc. Duplex communication circuit includes switches with a capacity of 1 , 3, 5, 10 and 20 subscribers, interconnected in any combination without limiting the number. Communication is carried out by using a noise-resistant microphone and a built-in or external speaker. The subscriber is called by a light signal and voice. Switches are made of three types: mounted - for installation in interior rooms, waterproof - for installation on the upper deck and console - for installation in control panels of the facility.

The switches are interconnected by a cable of the KMPVE type and are equipped with cases and panels on which controls, commutations and indications are installed, as well as connectors to which electro-acoustic transducers, cables of external mounting and a secondary power source are connected.

This hardware complex, which is a prototype, is designed for use in communication systems having an arbitrary configuration. Each of the communication switches of this complex has the same interfaces, which allows you to design the connection of the switches without restrictions, regardless of their location or belonging to a specific communication scheme.

However, this complex has a significant drawback - each communication direction corresponds to a specific communication line, which

Most projects result in a significant need for line cables. In addition, the complex has significant hardware redundancy and a large range of devices (switches).

The purpose of the utility model is to expand the functionality, reduce the range of devices while reducing the linear cable network.

This goal is achieved by introducing into the well-known system of switching centers (CC) and connecting them together in series with fiber-optic communication lines (FOCL), to which the switches and remotes are connected, the block of cabin shutoff speakers, the broadcast unit and the subscriber line of telephone sets, at the same time, the control centers contain N transceiver and subscriber modules connected to the backup and main control buses, “B1”, “B2”, “E” buses, and the backup and main control device bus is connected to the system d documenting information, random access memory (RAM) channel "E", synchronizer, RAM channel "D" and the extender trunk. The line extender, in turn, is connected to the addressing bus and the data bus, to which both the backup and the main central processors and the reserve cell are connected, while the switches and consoles contain a microcontroller connected to the switch, transceiver, indicator, and control circuit. The control circuitry is connected to a keyboard and a voltage converter, to which a microphone and terminal amplifier are connected, and a speaker and a microphone are connected to the amplifier output, the switch output being connected to different switching centers, and the transceiver is connected to the B2 bus.

The block diagram of the system is shown in figure 1. It contains: CC 1, interconnected FOCL 2. Switchboards 3 are connected to each CC 1, as well as cabin and cut-off speaker units, broadcast units and subscriber line units of telephone sets (not shown in FIG.). To the switches 3 are connected electro-acoustic transducers 4 (Mkf., Gr. And others).

The structural diagram of KC 1 is shown in figure 2. It contains: a control device 5 (i.e., a central processor) and a backup control device 6, a synchronizer 7, RAM channel “D” 8, RAM channel “E” 9, a line extender 10, a junction box with the documentation apparatus 11, four subscriber units modules 12 for 32 subscribers each, trunk transmitting 13 and receiving 14 modules for 16 communication directions, a control and backup cell 15, a backup bus 16 and a main bus 17 of the control device, control bus 18, address bus 19, data bus 20, and tires "B1", "B2" and "D". Each primary 5 and backup 6 CPUs include: RAM, ROM, and EEPROM. Subscriber module 12 consists of a switch for 32 subscribers, an adder, a group converter and subscriber sets. The composition of the main receiving module 14 includes: a line extender, a reception manager, and fiber optic receivers. A trunk transmitter module

15 consists of a line extender, transmission manager and FOCL transmitters.

In case of failure or failure of the main computer by the control and backup unit 15, the control functions of KC 1 are transferred to the backup computer and the emergency operation mode is indicated. The main clock signals that determine the operation of the CC 1 as a whole are generated by the synchronization cell 7.

The main part is a 125 μs switching frame.

To ensure frame synchronization, one of the CC 1 of the communication network is programmatically called "leading" and is the frame master for which the remaining CC 1 is adjusted. If there is no direct connection of any CC 1 with the "leader", a two-stage synchronization method is possible when for this CC 1 the secondary “leading” KC 1 is selected, which has direct connections with the main one. If the “leading” KC 1 fails, a new frame master is assigned by software and the network is automatically resynchronized, while information about all subscriber connections is saved.

As the data transmission medium between the CC 1, FOCL 2 is used with a physical speed in the line of 8192 kBit / s.

For data exchange between the processors of adjacent CC 1, the signaling channel “E” is allocated with a through speed of 64 kbit / s, and 120 channels “B” are allocated with the same speed for information transfer between system subscribers; the general structure of the trunk exchange is 120 V + E. The link between the control unit KC 1 and the channel-forming equipment during the organization of channel “E” is the RAM of channel “E” 9, which allows temporarily storing received data from incoming communication lines until it is read by the central processor KC 1, as well as buffering the information transmitted by the processor.

The transmission manager cell serves to form the flow of channel “B” of the trunk exchange.

The reception manager solves the inverse problem of extracting the required channels "B" from the total data stream from all communication directions. This principle of constructing the receiving and transmitting modules can allow you to vary the number of trunk lines from 2 to 16, changing the number of cells of the fiber optic receiver, fiber optic transmitter and transmission manager. A two-wire line with a physical speed in the line of 512 kBit / s serves as a data transmission medium between KTs 1 and switches 3.

For data exchange between CPU 5 of KTs 1 and the processor of switch 3, a synchronization channel “D” with a through speed of 64 kBit / s is allocated, channel “B1” for voice samples, channel “B2” at the same speed; the general structure of information exchange can be represented as 2 V + D.

The junction cell with the documentation system 11 allows for 4 program-selected subscribers to carry out the selection of voice samples “B1” from the bus and to convert all subscriber’s respondents to the analog signal form, including himself.

Figure 3 shows the structural diagram of the switch 3, it includes:

- switching device 20;

- transceiver 21;

- microcontroller switch 22;

- voltage converter 23;

- governing bodies 24;

- amplifier 26;

- indicator 27.

The switching device 20 performs automatic or manual switching from the main to the backup communication line, as well as the transition to automatic control of the switch 3. The functions of the transceiver 21 include coordination with the transformer of the galvanic isolation of the channel, receiving serial information in the Manchester II code, processing incoming information and sharing it through channels.

The task of the controller of the switch 22 includes controlling the keyboard, indicating devices and audible alarms, processing and forming the channel “D” indication, managing the information line, and managing the transition from the primary to the backup communication line.

The voltage Converter 23 generates the voltage necessary for the operation of the switch 3. The control circuit of the keyboard 24 receives messages about pressing a key, buffering the code of the pressed button and issuing the button code to the controller.

The amplifier 25 serves to amplify the signals of both the microphone and the terminal. Indicator 26 provides an indication of the numbers of the called (outgoing call) subscriber, an indication of the results of control.

The system is as follows.

The program is built on the principle of polling all subscribers, starting from zero, on channel “D”. Then a sequential survey of channel “E” is performed for all CC 1.

The poll of each RAM is carried out before receiving a "blank" message. A confirmation byte is sent to any signal received on channel “D” at the address of the interrogated subscriber. Messages received on the D channel can be either single-byte or multi-byte. Each message ends with a confirmation byte, the absence of which indicates incomplete reception.

The absolute number of the subscriber is determined by the place of connection of his communication line to KC 1. Therefore, switches 3 connected to two KC 1 can work according to one of the numbers - primary or backup.

When organizing communications, exchanges over service information channels are carried out with the primary number of the subscriber. The current number is used when determining the direction of broadcasting call signals and when recording in conference RAM.

When a subscriber switches from one line to another, all established connections must be cross-routed to his new number. Switching indicator is switch 3. It forms

a special team informing KC 1 about the start of work through it, and then transmits information about all established connections and sent call signals. Upon receipt of a special command, KC 1 cleans the RAM of the subscriber's conference and processes the signals for establishing a connection using the usual algorithm, where the subscriber changes his current number, upon receipt of which correction is made in the central libraries of KC 1.

In the switch, 3 buttons are arranged in a matrix. In the initial state, the entire matrix is zero, when the button is pressed, the corresponding matrix element goes into the “Log.1” state. In each cycle, the entire matrix is read. The status of the subscriber is indicated by various modes of burning of the button LED. Each button corresponds to a RAM cell into which the state is written in the format. Information from the cells of the highlighting mode is extracted in each program cycle and based on it, as well as based on the status of the time stamp counter, bytes are compiled for distribution to the ports that control the LEDs on.

The transceiver of the switch 3 when working with KTs 1 is in slave mode. The first half of 125 μs of the messaging cycle is reserved for receiving information from CC 1, the second half - for transmission to CC 1. The exchange is continuous, in the absence of meaningful information empty (zero) messages are sent. This constantly supports the synchronization mode of KTs 1 and switch 3.

Using the inventive system allows you to:

- expand the functionality of the equipment and increase the efficiency of network use by combining several types of services (GGT transmission and broadcasting, transmission of control signals, etc.), as well as the organization of telephone communications in a single switch;

- reduce the number and weight of linear cables by 5 times;

- reduce the number of terminal devices at the facility;

- increase the reliability and survivability of the system.

Claims (1)

An intra-site communication system, comprising switches and consoles located in different rooms and equipped with cases and panels on which controls and displays are installed, subscriber switches and a subscriber kit circuit, as well as N connectors to which electroacoustic transducers and external cables are connected installation and secondary power sources, characterized in that the system additionally includes switching centers (CC), connected in series with each other by fiber optic communication links to which the switches and consoles, the broadcast unit and the subscriber line unit of telephone sets are connected, while the CCs contain N subscriber modules connected to the primary and backup control bus, channels “B1”, “B2” and “E”, and the bus the backup and main control device is connected to the information documentation system, random access memory (RAM) of channel “E”, with a sync generator, RAM of channel “D” and a line extender, which, in turn, is connected to the control bus, addressing bus and bus data transmission, which are connected to both the backup and the main central processors and the reserve cell, while the switches and consoles contain a microcontroller, a switching device, a transceiver, an amplifier, a converter, a keyboard control circuit and an indicator, the switch being connected to the CC and duplicating devices by the first input KC, the second input is connected to the transceiver, while the first input transceiver is connected to an amplifier to which a loudspeaker and microphone are connected, the second input - to the channel "B2", the third an input - with a microcontroller, the first output of which is connected to the switch, the second - with an indicator, and the third output - with the keyboard control circuit to which the keyboard is connected, the voltage converter with the first output connected to the transceiver, the second output - with the microcontroller, the third output - with an amplifier, the fourth output with a switch, and the fifth output with a keyboard control circuit.