JPS61287367A - Control system for line folding - Google Patents

Abstract

PURPOSE:To attain effective troubleshooting by providing a means for identify ing whether a line in connection is another line in a terminal controller or not, operating a selection means when the line in connection is another line of the said controller to connect an output line of the other line to an input circuit section of the own line. CONSTITUTION:A host processor 1 controls a network controller (NCU) 3 at first to call an exchange 4. The exchange 4 calls a line having a designated number and when the line is another line of the own device, since a call display signal is informed from the NCU 3, an incoming line sends an attribute signal of a facsimile equipment for reply. When the attribute signal is received at the incoming side, the information (ID) inherent to a caller is checked and when the ID belongs to the other line of the own device, a switch signal of an analog switch is generated and the connection of the corresponding output line to the input circuit is conducted.

Description

[Detailed Description of the Invention] [Summary] A terminal control device accommodates a plurality of lines for making exchange connections with a plurality of terminals, and when the connected line is another line within the terminal control device. A configuration is shown in which, if it is determined, the output line of the other line is connected back to the input circuit section of the own line.

[Industrial application field]

The present invention relates to a terminal control device located between a host processing device and a terminal device connected to a public communication line, and controlling data transmission between the host processing device and the terminal device.

[Prior art and problems to be solved by the invention] Conventional line loopback technology includes a loopback method via a switchboard, but in this method, if a failure occurs in the public line or switchboard after the loopback route is set, , there was a problem that callback data could not be entered correctly. .

There is also a method of directly connecting the call back without using a public line, but in this case there is a problem in that it is not possible to call back while the system is in operation and requires manual intervention.

[Means for solving problems]

The present invention provides a terminal control device with a plurality of lines that independently perform connection operations with a host processing device and a terminal device, and a terminal control device that is equipped with an input circuit corresponding to each line to control the public line or the terminal. Provided with selection means for selecting and inputting an output line group of other lines in the device, and means for identifying whether the connected line is another line in the terminal control device,
If the currently connected line is determined to be another line within the terminal control device, the selection means is operated to connect the output line of the other line to the input circuit of the own line. It is characterized by

[Effect]

The present invention provides a terminal control device, such as a facsimile connection device, that connects a terminal device, for example, a facsimile device, and a host computer, which has a function of connecting multiple lines, and first transmits command information from a line connected via an exchange. If the input signal is from another line within the device itself, it controls the input signal selection circuit installed in the receiving circuit, switches the route from via the switched line, and outputs the signal directly from the transmitting circuit. It is designed to receive the following information.

In this way, by supporting loopback operations between self-devices in the operational state without external control,
Obstacle isolation can perform the operation effectively.

〔Example〕

FIG. 2 is a diagram showing a system configuration of an embodiment to which the present invention is applied.

In the figure, 1 is a host processing device, which transmits character code information, image information, and vector information to the facsimile connection device 2, and inputs image data from the facsimile connection device 2. Furthermore, the host processing unit 1 connects to the network control unit (NCU) 3 and controls the network control unit 5, via the exchange 4.
AX can be selected. As a result, the facsimile connection device 2 and the facsimile 5 are physically connected on a 1:1 basis.

FIG. 3 is a diagram showing a block configuration of a facsimile connection device according to an embodiment of the present invention. In the figure, reference numeral 11 indicates a line connection section of a facsimile connection device, and a plurality of these are installed. 12 is an image data conversion section. The converted data input from the host is passed to the image data converter 12 via the line connection unit 11, and the converted data is
It is returned to the line connection unit 11 and sent from there to the FAX 5 via the NCU 3.

FIG. 4 is a detailed diagram of the line connection section 11 shown in FIG. 3. Each line connection section 11 has a buffer memory (MEM), an image processor interface section (IPIF), a host interface 1 (HI
TF), facsimile interface section (FITF),
It is composed of a modem section (Modem) and an LSW (line switch) section common to each line.

Data input from the host processing device is buffered in the MEM via the HITF, and sent via the IPIF to the image processing section 12 shown in FIG. 3. Information converted into image data by the image processing unit 12 is stored in the MEM via the IPIF, and the information is stored in the FITF.
, Modem to the line. Conversely, image data input from the line follows a completely opposite route,
Sent to host processing device.

FIG. 1 is a diagram showing a characteristic part of the present invention, and shows the inside of the LSW shown in FIG. 4 in detail. The output signal from the modem is sent to the FA via the NCU via the transformer T.
Sent to X. On the other hand, the input signal from the FAX is sent to the NCU.
The configuration is such that the signal is input to the modem via an analog switch SW via a transformer. Furthermore, output lines of other lines are input to the analog SW, and the analog SW is configured to be able to select and output an input signal by inputting a control signal from the FITF section.

Line switching control will be explained based on the sequence diagram shown in FIG. First, the host processing device 1 controls the NCU 3 to place a call to the exchange 4. The exchange 4 makes a call to the line with the specified number, but if that line is another line of its own device, the NCU 3 notifies the call indication signal, so the called line calls the facsimile to answer. The attribute signal N5F-DIS signal is transmitted. N.S.
The F signal is a non-standard attribute notification command, and the DIS is a standard attribute notification command, and both are transmitted as continuous frames. Note that the NSF frame is a non-standard frame and may have device-specific information in its data field.

Commands from the called party are input to the calling party's line. The calling side recognizes the input command and issues an NSS command. The NSS command is a non-standard attribute setting command and may have device-specific information. Using this, caller-specific information (ID, etc.) is added to the data field.
Add and send. When the called side receives an NSS frame, it checks the ID and if it determines that the ID belongs to another line of its own device, it generates an analog switch switching signal via the FITF section and switches the corresponding output line. Performs the operation of connecting to the input circuit. The transmitting side transmits a training signal following the transmission of the NSS command, but the signal is immediately looped back, becomes an input signal of the incoming line, and is sent to the input circuit. The subsequent operation is that the calling line and the called line exchange procedure signals and information according to the sequence of known facsimile procedures, so that the information from the calling line is input to the called line, and the host processor will be sent to.

〔Effect of the invention〕

According to the present invention, it is possible to return the line without going through an exchange only by controlling the dial destination from the host processing device without any external control, so high-quality return data can be obtained, and it is possible to disconnect the line in the event of a system failure. minutes can be effectively used as a means.

Furthermore, this device can be positioned as, for example, an image data converter for a host processing device, which has the effect of increasing the degree of freedom in system configuration.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the main parts of one embodiment of the present invention, FIG. 2 is a diagram showing the system configuration of one embodiment in which the present invention is commonly used, and FIG. 3 is a diagram showing the facsimile connection of one embodiment of the present invention. FIG. 4 is a diagram showing details of a line connection section; FIG. 5 is a diagram showing an example of an operation sequence in the embodiment. In Figure 2, 1 is a host processing device, 2 is a facsimile connection device, 3 is a network control device, 4 is a switch, and 5 is a FAX
It is.

Claims (1)

[Scope of Claims] A terminal control device located between a host processing device and a terminal device connected to a public communication line, and controlling data transmission between the host processing device and the terminal device, comprising: a host processing device and a terminal device; It is equipped with a plurality of lines that perform the connection operation with the equipment independently, and for each line, the output line group provided in the input circuit section of the public line or other line in the terminal control device is selected. Provide a selection means for inputting and a means for identifying whether the connected line is another line within the terminal control device, and when it is determined that the connected line is another line within the terminal control device. The line return control system is characterized in that the selection means is operated to connect the output line of the other line to the input line section of the own line.