JPS59122078A - Facsimile terminal equipment - Google Patents

Abstract

PURPOSE:To use a facsimile terminal equipment for an analog a digital network in common by providing a network controller equipped with a digital signal processor and a microprocessor, and a communication controller which follows a transmission control procedure. CONSTITUTION:When a picture signal is transmitted by using a telephone network, a transmission control signal D21 outputted by the communication cotroller 4 and the signal SD of a scanner after encoding 3 are convered by the signal converter 5e of the network controller 5 into analog signals, which are sent out to the telephone network. Further, transmission control data returned from the opposite station is applied to the converter 5e, which converts the signal into a digital signal and sends it to the controller 4. When picture information is transmitted by using a digital network, the controller 4 is put in operation to follow a transmssion procedure for the digital network. Transmit data D11 outputted by the controller 4 during said period is sent out to the opposite station through interface circuits 5e and 5h of the controller 5 and response data D12 from the opposite station is sent out to the controller 4 through circuits 5h and 5a.

Description

[Detailed description of the invention] Technical field] The present invention relates to a facsimile device.

[Prior art]

Typically, facsimile machines use either an analog line network such as a telephone line network or a digital line network as their transmission line. However, data communication between these line networks, such as data transmission from a facsimile machine using an analog line network to a facsimile machine using a digital line network, is not possible.

Furthermore, since a facsimile device that can be shared by both line networks has not been realized in the past, a problem has arisen in that data cannot be transmitted between facsimile communication systems using analog line networks and facsimile communication systems using digital line networks. Ta.

〔the purpose〕

The present invention has been made in view of the above-mentioned circumstances.
The purpose of this invention is to provide a facsimile device that can be used in both analog and digital networks.

〔composition〕

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a schematic configuration of an embodiment of the present invention.

In the figure, 1 is a scanner that performs two-dimensional scanning and photoelectric conversion of a transmitted document, 2 is a printer that records received images as dot images, and 3 is a DCR (code converter) that encodes transmitted image signals and decodes received data. equipment), 4
5 is a CCU (communication control unit) that executes transmission control for the telephone line network (that is, analog line network) and digital line, and 5 is an NCU that connects this facsimile machine F with the analog line network and the digital line network.
(network control device), 6 is the scanner 1. Blink 2, D
An SCU (supervisor control unit) and 7, which control the operation mode and timing of the CR3, CCU 4, and NCU 5, are operation panels that form a man-machine interface between the operator and the facsimile machine F. Further, B is the system path line in the facsimile machine F.

FIG. 2 shows how transmission information (image information) and transmission control signals are exchanged between the DCR 3, CCU 4, and NCU 5. DCR3 to CCU 4 and N
The signal SD applied to the CU 5 is a transmission image signal obtained by encoding the output signal of the scanner 1 by the DCR 3, and is
The signal Dll applied from the CU 4 to the NCU 5 is transmission data in which the CCU 4 frames the signal SD and a control signal according to a transmission control procedure related to a digital line network, for example, according to an HDLC procedure. NCU 5 to CCU
The signal D1□ added to the signal D1□ is data transmitted from the other station via the digital line network, and is a signal formed by processing the encoded image signal and transmission control signal into frames in the same way as the signal Dll. be.

Signals D21 and D22 are transmission control signals when a telephone network is used as a transmission line, that is, CCITT recommendation T.
This is a signal based on the G37 axis control procedure referred to in G.-30. The image signal received from the analog line network and the image signal included in the signal D12 are still added to the DCR3 as the received image signal RD.

This figure shows DCR3, CCU4 and NCU5.
The connection between the line and the system path line B is omitted.

FIG. 3 shows details of the NCU 3. In the figure, 5a is the above-mentioned signal Dll + D12 r D21
rD22 + Interface circuit j'L5b is an interface circuit for connecting this NCU3 and system path line B, 5c is an internal path line, and 5d is a transmission image signal SD and signal D2.
10FSK modulation calculation, received image signal RD and signal D2
5e is a digital/analog converter that converts the output data of DSP 5d into an analog signal, and an interface circuit for the telephone line network (hereinafter referred to as telephone I).
/F) 5f is a signal converter consisting of an analog/digital converter that converts the received signal input into a digital signal, and 5g is a data memo that stores individual data such as dial data corresponding to a speed dial number! 7.5b
An interface circuit (hereinafter referred to as X21 I/F) for data transmission with a digital line network via it (DCE C data line termination equipment according to χITT Recommendation X21)
) and 51 are CPUs (Central Processing Units) that control the respective units constituting the NCU 5.

The telephone I/F 5f includes a DC connection circuit, an incoming call detection circuit (not shown) that detects a 16 Hz ringing signal output from the exchange, and a tone signal (push button signal) corresponding to dial data. ) is provided with a multi-frequency signal generator (not shown).

FIG. 4 illustrates the operation panel 7. As shown in FIG. In the figure, 7a is a line selection key for selecting a digital line network or a telephone line network as a transmission line, and 7b is a line selection key 7a.
This lamp lights up to indicate that the digital line network has been selected. 7C is a transmission start key, 7d is a linear density changeover switch, 7e is a power switch, and 7f is a display device for making various displays.

When transmitting an image signal using the telephone line network with the above configuration, the receiver sets the transmission document on the scanner 1 without operating the line selection key 7a, then calls the other party's station and starts transmission. Press key 7c.

As a result, the 5CU 6 outputs an access line connection instruction signal to the NCU 5 via the system path line B, which causes the CPU 51 of the NCU 5 to activate the telephone I/'F 5f to close the DC path with the telephone line. 5C1J6
send it back to

Thereafter, the SCU 6 causes the CCU 4 to execute a transmission control procedure for the telephone line, and operates the scanner 1 based on a response signal from the CCU 4.

During this time, the transmission control signal D21 output by the CCU 4 and the signal SD in which the output data of the scanner 1 is encoded by the DCR 3 are applied to the DSP 5 d via the interface circuit 5 a of the NCU 5 and the internal path line 5 C, and are applied to the FS.
After being K-modulated and further converted into an analog signal by a signal converter 5e, it is sent to the telephone line network via the telephone I/i'' 5f and received by the other party's station.

In addition, the transmission control data returned from the other station is
/F 5 f to the signal converter 5e where it is converted into a digital signal, and further FSK demodulated by the DSP 5 d to be converted into a transmission control signal I)zz, which is sent to the internal path line 5C and the intern ace circuit 5a. CC via
Sent to U4.

For example, when the operator inputs the speed dial number of the other station using a numeric keypad (not shown),
It is also possible for the 5CU 6 to output a calling command to the NCU 5. In this case, the SCU 6 outputs the speed dial number data to the NCU 5 following the calling command, thereby causing the CPU 5 i of the NCU 5 to access the telephone I/17' 5
After closing the DC path by f, the data memory 5g
The dial data corresponding to the short dial number data is read out from the dial data and applied to the multi-frequency signal generator of the telephone I/F 5f. This allows the PB that corresponds to the dial data to
A doubled signal is output and the other station is called.

Further, among the modulation and demodulation functions of the DSP 5d, the CPU 51 may perform functions of a scrambler, a descrambler, a decoder, and an encoder, which are simply combinations of logical operations.

When a call is made from another station connected to the telephone line network, the 16Hz ringing signal output from the exchange is sent to the telephone ■/T.
It is detected by the incoming call detection circuit of 5 f and its output is sent to the CPU.
5 i. CPU 5 i is telephone I, /'F
5f closes the DC path and sends a signal indicating that a call has been made to the SCU 6 via the internal path line 5c, interface circuit 5b and system path line B.
Output to.

As a result, the 5CU 6 activates the CCU 4 to execute the transmission control procedure between the calling stations, and also causes the DCR 3 to decode the received image signal RD transmitted from the other station and output it to the printer 2. , output the received image.

When transmitting image information using a digital line network, the operator presses the line selection key 7a to select the digital line network, sets the original to be transmitted on the scanner 1, and then presses the transmission start key 7c. As a result, 5CU6 outputs a digital line network establishment signal to NCU 5, and the CPU of NCU3
5 i operates X 21 I/F 5 h, and each terminal T, C, I of this X 21 I/F 5 h.

Each R is controlled according to a predetermined procedure (according to X21) to establish a line with the digital line network, and then a line establishment signal is sent to the SCU 6.

The SCU 6 operates the CCU 4 to execute a transmission procedure for the digital line network, and operates the scanner 1 accordingly. During that time, the transmission data I)i output from the CCU4
t is sent to the other station via the interface circuit u 5a % internal path line 5b and the terminal T of the X 21 I/F 5 h, and response data I from the other station]
12 is the terminal R1 of the
Sent to U4.

In this way, image information is transmitted through the digital line network.

When receiving image information from a station connected to a digital line network, first, when an incoming call is detected at terminal R of X21I/11'5h, CPU S1 sends an SC
In addition to reporting to U 6, a line is established by controlling each terminal T, C, I, and R of X 21 The rear SCU 6 operates the CCU 4 to execute a predetermined transmission procedure, and accordingly operates the printer 2.
The image signal output from the DCR 3 is output to the link 2 to form a received image.

In this way, image information is transmitted through the telephone line network and the digital line network.

〔effect〕

As explained above, according to the present invention, it is possible to realize a facsimile device that can be applied to both an analog line network and a digital line network, and since modulation and demodulation are performed by a DSP installed in the NCU, transmission related to the analog line network can be realized. This has the advantage of not requiring a modem (modulator/demodulator), which is required when performing

[Brief explanation of drawings]

FIG. 1 is a block diagram schematically showing an embodiment of the present invention, and FIG. 2 is a block diagram showing how transmission signals (including transmission control signals) are exchanged between the DCR, CCU, and NCU. , FIG. 3 is a block diagram showing the detailed configuration of the NCU, and FIG. 4 is a front view showing the operation/f channel. 4-CCU, 5-NCU, 5 d-DSP, 5
e - Signal converter, 5f...Telephone ■shio, 5h...
X211 Shio, 5j...CPU. Figure 2

Claims (1)

[Claims] A digital signal processing device that modulates and demodulates transmitted and received data, an analog line network interface circuit, a digital line network interface circuit, and a network control device equipped with a microprocessor that controls these, and transmission related to each of the analog line network and digital line network. A facsimile machine equipped with a communication control device that performs control procedures.