RU2297106C1 - Terminal-equipment data-to-communication-channel interfacing device - Google Patents

Abstract

FIELD: message exchange between data terminal equipment over various communication channels.

SUBSTANCE: newly introduced in prior-art device is digital signal-processing unit that implements modem function and enhanced reception reliability and executes extended communication program. Device for interfacing terminal data equipment and communication channel has interface, communication channel 9, memory unit 3, interface circuit 1, codec 8, digital processing unit 5, random-access memory 6, program processing memory 7, controller 3, and data/voice switching unit 13. Such device affords interaction between any data terminal equipment and channel-forming equipment of various communication channels.

EFFECT: enlarged functional capabilities.

9 cl, 1 dwg

Description

The communication channel interface device is intended for exchanging messages between data terminal equipment via various communication channels.

A device is known that connects a modem to one of the common telephone networks without damaging the data transfer. The device includes a first encoder-decoder connected to a modem, a plurality of second encoder-decoders, each of which is connected to a respective one of the telephone lines, and a time delay relay connected between the first encoder-decoder and the second encoder-decoder. The first encoder-decoder converts the analog output signal from the modem to a digital signal for transmission to telephone lines and converts the digital output signal from the telephone lines to an analog signal for transmitting the converted analog signal to the modem. Each of the second encoder-decoders converts the analog signal from the telephone line into a digital signal for transmitting the converted digital signal to the first encoder-decoder and converts the digital output signal of the first encoder-decoder into an analog signal for transmitting the converted analog signal to the telephone line. The time delay relay transmits a digital output signal from the first encoder-decoder to one of the second encoder-decoders and transmits a digital output signal from one of the second encoder-decoders to the first encoder-decoder, which is a technical result (RF patent No. 2127492, H 04 M 11/00, published 1999.03.10).

The disadvantage of this device is its non-universality.

A device for interfacing a data terminal equipment (OOD) with a communication channel, including a communication channel interface, interfaced with a communication channel and designed to receive an input data signal from a channel and transmit an outgoing data signal to the channel; a storage device connected to the interface of the communication channel and storing arrays of digital data; a codec connected to the storage device and the communication channel interface, periodically sampling the incoming data signal to form a sequence of samples of the input data and writing it to the storage device, as well as to receive a sequence of outgoing digital data from the storage device and convert it to an outgoing data signal; an interface circuit connected to a storage device and an OOD for exchanging data between the OOD and the storage device (RF application for invention No. 98117709, H 04 M 11/00, publ. 2000.06.27).

The limited possibility of using such a device is due to the fact that in most existing types of data terminal equipment, especially compact and mobile specialized OOD, unlike, for example, a computer or workstation, the implementation of the functions of the modem and application communication program is not provided or impossible, and In these cases, the specified device is not applicable.

The basis of the invention is the task of creating a pairing device that interacts between any OOD and channel-forming equipment of various communication channels, by including in it a digital signal processing unit that implements the functions of a modem and improves the reliability of reception and performs an extended communication program.

The achievement of the above technical result is ensured by the fact that in the interface device of the data terminal with a communication channel, including a communication channel interface, interfaced with a communication channel and designed to receive an input data signal from a channel and transmit an outgoing data signal to the channel; first random access memory for storing digital data arrays; a codec for periodically sampling an incoming data signal for its subsequent recording in the first random access memory, as well as for receiving a sequence of outgoing digital data generated in the first random access memory and converting it into an outgoing data signal; an interface circuit connected to the first random access memory and data terminal equipment for exchanging data between the data terminal equipment and the first random access memory, a digital signal processing unit, a second random access memory, read only memory, a control controller, an intercom and call station are further included, a data / speech switch, while the digital signal processing unit is connected to the codec, the first random access memory TV, a second random-access memory and read-only memory; the control controller is connected to an interface circuit, a read-only memory, a first random access memory, a digital signal processing unit, a data / speech switch and a communication channel interface; the data / speech switch is connected to the interface of the communication channel, the codec and the intercom / call console; the communication channel interface is made in the form of a set of interfaces interfaced with the channel-forming equipment of various types of communication channels and selected by a signal from the control controller; The interface circuit is made in the form of a set of interfaces that are interfaced with data terminal equipment of various types and are selected by a signal from the control controller, which is made in the form of a programmable switching device that selects the operating mode as instructed by the operator.

The control controller provides functions for selecting the mode of voice communication with the correspondent; selecting a data terminal equipment interface, a communication channel interface, a program for a digital signal processing unit from read-only memory, corresponding to the selected type of communication channel; reading a message from the selected data terminal equipment interface into the first random access memory, transmitting a message from the first random access memory to the communication channel, receiving a message from the communication channel to the first random access memory, writing a message from the first random access memory to the data terminal.

The digital signal processing unit includes a line state determinant, dialing signal conditioners for establishing communication with a correspondent through an automatic telephone exchange in pulse and frequency modes, a modem and a processor that implements the function of increasing the reliability of reception.

When establishing communication with the correspondent through directly connected channel-forming radio facilities, pairing with them is performed through the connectors of their microtelephone headsets.

When establishing communication with the correspondent through remotely controlled channel-forming radio facilities, pairing with them was performed at their remote control inputs.

A voice masking device is connected to the data / speech switch, including means for supplying and indicating a call and a handset for conducting masked negotiations.

The transfer of the basic communication functions to the digital signal processing unit made it possible to create a compact, mobile universal device for interfacing any type of data terminal equipment with any type of communication channel without the use of computers and workstations not adapted for mobile applications, for example, in field conditions.

The presence of a control controller provides the ability to control the components of the device and indicate the status of the device, the status of the communication channel and the process of exchanging messages with the correspondent.

The presence of a call-and-call console, including call supply and indication tools and a telephone handset for negotiating communication, as well as a data / speech switch that switches the communication channel interface to the voice transmission mode using control signals from the control controller, provides open or masked speech conversations.

The presence of the interface of the communication channel, made in the form of a set of interfaces that are interfaced with the channel-forming equipment of communication channels of various types and switched to a predetermined mode of communication with the correspondent (data or speech), an interface circuit made in the form of a set of interfaces that are interfaced with terminal equipment of data of various types, and a control controller with controls and indications, made in the form of a programmable switching device that selects the operating mode, provides the main x device functions for the implementation of the choice of communication mode.

The presence in the control controller of the functions of reading a message from the data terminal equipment to the first random access memory, transmitting a message from the first random access memory through a digital signal processing unit, a codec and a data / speech switch to a communication channel, receiving a message from a communication channel through a data / speech switch , codec and digital signal processing unit to the first random access memory, recording messages from the first random access memory to terminal equipment d nnyh; choice of the mode of voice communication with the correspondent (masked or unmasked speech); selection of the data terminal equipment interface from among those available in the interface circuit, the communication channel interface from among those contained in it, the program of the digital signal processing unit from the read-only memory device corresponding to the selected communication channel type, and the presence of state determination functions in the digital signal processing unit lines and generating dialing signals to establish communication with the correspondent through an automatic telephone exchange ensure that the designing a technical task device.

The invention is illustrated by the drawing, which shows a block diagram of a device for interfacing data terminal equipment with a communication channel.

The interface device contains an interface circuit 1 with output to the data terminal equipment 2, a control controller 3, a first random access memory 4, a digital signal processing unit 5, a second random access memory 6, read-only memory 7, a codec 8, a communication channel interface 9 with an output on communication channels 10, a masking device for speech 11, intercom 12, the data / speech switch 13.

The digital signal processing unit 5 contains a line state determinant, dialing signal generators for establishing communication with the correspondent through the automatic telephone exchange in pulse and frequency modes, a modem and a processor that implements the function of increasing the reliability of reception.

The device operates as follows.

If necessary, on the transmitting side to transmit to the correspondent an outgoing message prepared in OOD 2, the operator, using the control and indication bodies of the control controller 3, sequentially performs the following operations:

- sets the type of the OOD interface from those available in the interface circuit 1, corresponding to the type and operation mode of the data terminal equipment 2;

- reads the message data file intended for transmission over communication channel 10 from the OOD 2 through the interface selected in the interface circuit 1 to the first random access memory 4;

- sets the required type of channel interface from the available in the communication channel interface 9, the signal processing program number from the read-only memory 7, the operation mode of the digital signal processing unit 5, corresponding to the type and operation mode of the communication channel 10;

- sets the data / speech switch 13 to the mode of conducting open voice conversations, thereby connecting the intercom-remote control 12 to the selected interface of the communication channel 9;

- when working on a radio network or on a dedicated telephone line, calls the correspondent using the calling means from the intercom 12; when working on the PBX network, it dials and sends the subscriber's number in pulse or frequency mode, using the dialing tools from the intercom 12, as well as the line state determinant and the dialing signal generator in pulse or frequency modes from the digital signal processing unit 5;

- conducts open negotiations to establish communication with the correspondent, using the handset from the negotiation and calling station 12, during the negotiations notifies the correspondent of his intention to conduct masked negotiations or transmit a message;

- if necessary, conducting masked voice conversations sets the data / speech switch 13 to the mode of conducting masked negotiations, thereby connecting the voice masking device 11 to the selected interface of the communication channel 9, and negotiates with the correspondent using the handset of the voice masking device 11;

- making sure, based on the results of negotiations about the correspondent’s readiness to receive the message, sets the data / speech switch 13 to the data file transmission mode, thereby connecting the codec 8 to the selected interface of the communication channel 9, while the digital signal processing unit 5 executes the program selected from the read-only memory 7 modulation of the signals stored in the first random access memory 4, placing intermediate results of calculations in the second random access memory 6. The program executed by th digital signal processing 5, divides the transmitted message on the information blocks and each block complement checksum. Information blocks are alternately transmitted to the correspondent via communication channel 10 until the completion of the transmission of the entire outgoing message. After the last block has been transmitted, the device automatically enters reception mode and waits for receipt from the correspondent of a receipt on the reliable receipt of a message or a list of unaccepted blocks. In the presence of blocks not accepted by the correspondent, the device again automatically switches to transmission mode and sends the correspondent blocks that were not originally accepted by it to the correspondent, thereby performing actions according to the well-known request-repeat reliability method. The exchange process and channel status are displayed on the display organs of the control controller 3.

Upon completion of the transmission of the outgoing message, the data / speech switch 13 and the digital signal processing unit 5 are automatically set by the control controller 3 to the standby mode of the incoming call.

On the receiving side, to ensure readiness for receiving an incoming message from the correspondent, the operator, using the control and display elements of the control controller 3, sequentially performs the following operations:

- sets the required type of channel interface from the available as part of the communication channel interface 9, the signal processing program number from the read-only memory 7, the operation mode of the digital signal processing unit 5, corresponding to the type and operation mode of the communication channel 10;

- sets the type of the OOD interface from those available in the interface circuit 1, corresponding to the type and operation mode of the data terminal equipment 2;

- sets the data / speech switch 13 to the mode of conducting open voice conversations, thereby connecting the intercom-remote control 12 to the selected interface of the communication channel 9;

- when working on a radio network or on a dedicated telephone line, he receives a call from a correspondent, using the means of receiving a call from the intercom 12; when working on the network, the PBX receives a station call in a pulse or frequency mode, using the means from the intercom 12, as well as the line condition determiner from the digital signal processing unit 5;

- conducts open negotiations to establish communication with the correspondent, using the handset from the negotiation and calling console 12, during the negotiations notifies the correspondent of his willingness to conduct masked negotiations or receive a message;

- having received from the transmitting correspondent an instruction on conducting masked voice conversations, sets the data / speech switch 13 to the mode of conducting masked negotiations, thereby connecting the voice masking device 11 to the selected interface of the communication channel 9, and negotiates with the correspondent using the handset from the device masking speech 11;

- making sure, based on the results of negotiations about the correspondent’s intention to transmit the message, sets the data / speech switch 13 to the data file reception mode, thereby connecting the selected communication channel interface 9 to the codec 8, while the digital signal processing unit 5 executes the program selected from the read-only memory 7 demodulating signals by writing an incoming message file to the first random access memory 4 and placing the intermediate calculation results in the second random access memory 6. Pr gram performed by the processor from the digital signal processing unit 5 calculates the checksums received information blocks, compares them with the received checksum and fixes the comparison results for each block. After receiving the last block, the device automatically enters the transmission mode and sends the correspondent a receipt about the reliable receipt of the message or a list of unaccepted blocks. In the presence of unaccepted blocks, the device again automatically switches to the reception mode and records repeated blocks, thereby performing actions according to the well-known method of increasing the reliability of “request-repeat”. The exchange process and channel status are displayed on the display organs of the control controller 3;

- records the received incoming message from the first random access memory 4 in the OOD 2 through the selected interface from those available in the interface circuit 1.

Upon completion of the reception of the incoming message and its recording in the OOD, the data / speech switch 13 and the digital signal processing unit 5 are automatically set by the control controller 3 to the standby mode of the incoming call.

When establishing a connection between correspondents through an automatic telephone exchange, the connection of the interface devices to the communication channel is performed through the standard subscriber's end of the exchange. When establishing a connection with the correspondent through directly connected channel-forming radio facilities, they are mated through the connectors of their micro-telephone headsets. When establishing communication with the correspondent through remotely controlled channel-forming radio facilities, they are coupled and the reception / transmission is controlled by their remote control inputs.

Claims (9)

1. A device for interfacing data terminal equipment with a communication channel, including a communication channel interface for receiving an incoming signal and transmitting an outgoing signal; a storage device for storing arrays of digital data; an interface circuit for exchanging data between the storage device and the data terminal equipment; codec sampling the incoming signal and converting the sequence of outgoing data into the outgoing signal; characterized in that the device further includes a digital processing unit for processing samples of the incoming signal and generating a sequence of outgoing data; a storage device, a random access memory for storing intermediate computation data, a memory of processing programs corresponding to the selected type of communication channel are connected to the digital processing unit; as well as a control controller; a data / speech switch that switches operating modes of the communication channel interface; wherein the interface circuit is made in the form of sets of interfaces corresponding to the type of data terminal equipment, the communication channel interface is made in the form of sets of interfaces that are interfaced with channel-forming equipment corresponding to the type of communication channel; the signals of the control controller select the type of communication channel interface, the type of data terminal equipment interface, select the program from the program memory, switch the data / speech switch. 2. The interface device according to claim 1, characterized in that the control controller is made in the form of a programmable switching device that selects the operating mode as directed by the operator. 3. The interface device according to claim 1, characterized in that the control controller provides functions for writing data to a storage device, reading data from a storage device; transmitting the outgoing signal to the communication channel; receiving incoming from the communication channel. 4. The interface device according to claim 1, characterized in that the digital signal processing unit includes a line state determinant, dialing signal conditioners in pulse and frequency modes, a modem and a processor that implements the function of increasing the reliability of reception. 5. The interface device according to claim 1, characterized in that when using channel-forming radio equipment, pairing with it is performed through the connectors of the mic-telephone headsets. 6. The interface device according to claim 1, characterized in that when using a remotely controlled channel-forming radio equipment, pairing with it is performed at the remote control inputs. 7. The interface device according to claim 1, characterized in that it comprises a masking device for speech, including means for supplying and indicating a call and a telephone handset. 8. The interface device according to claim 5, characterized in that the operating modes of the communication channel interface include receiving data, transmitting data, open voice conversations, masked voice conversations. 9. The pairing device according to claim 1, characterized in that it comprises a call station for negotiating communication.