JPH03289755A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To enable connection both to a digital data exchange(DDX) network and an integrated services digital network(ISDN) to be performed by connecting a DDX interface to a G4 interface ordinarily and connecting an ISDN interface to the G4 interface by a switching means when incoming to the ISDN interface is detected at a switching control means. CONSTITUTION:Since the G4 interface 10 is connected to the DDX interface 12 ordinarily, image information is inputted to the G4 interface 10 via the switching means 13 when it arrives at the DDX interface 12. Meanwhile, when the image information arrives at the ISDN interface 11, the switching control means 15 controls the switching means 13 by detecting the information, and the G4 interface 10 is connected to the ISDN interface 11, therefore, the image information is inputted to the G4 interface 10 via the switching means 13. Therefore, data from the DDX network 17 and the one from the ISDN 16 can be surely inputted to the G4 interface. In such a way, it is possible to perform the connection to both the DDX network and the ISDN.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a facsimile machine, and in particular, to a facsimile machine used in an integrated service digital network.
Digital Network: ISDN
network) and digital data exchange network (Digital D
ATA Exchange: DDX network).

(Prior Art) The transmission paths of conventional facsimile machines have mainly been telephone networks and subscriber telecommunications networks, but recently, DDX networks for digital information have come into use.

In this DDX network, digital information from terminals is time-division multiplexed by a multiplex converter and digitally transmitted as a high-speed signal without being modulated.

Facsimile communication using a DDX network has an error rate that is about two orders of magnitude better than that of a telephone line, making highly reliable facsimile communication possible.

However, with the emergence of multiple line networks, for example, a user who wants to use both the telephone network and the DDX network will need to connect a subscriber line for the telephone network and a subscriber line for the DDX network. However, there were problems such as the basic charge being added up and being expensive, and the phone number and data network number being different.

Therefore, an I5DN network has been proposed as a solution to these problems.

The L5DN network is a line network that unifies information on various media such as telephones, facsimile machines, data, and video telex in digital format, and unifies communication services for these various media using the same number and under one subscription contract. It is.

Currently, services are provided by the DDX network and the I5DN network as digital communication networks, so users who wish to digitally transmit facsimile communications using a G4 facsimile device can use the DDX network or the I5DN network to operate the G4 mode. facsimile communication was carried out.

However, because the electrical specifications of the DDX network and the I5DN network are different, the user must use a G4 facsimile device equipped with an interface that can be connected to the line network to which the user subscribes, that is, the DDX network or the ISDN network. be.

(Issue 8 to be solved by the invention) In the above-mentioned conventional technology, since only one of the facsimile machine, DDX network interface, and L5DN network interface is provided, for example, a user subscribed to both lines However, there was a problem in that a dedicated facsimile machine had to be prepared for each line.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a facsimile device that can be connected to both a DDX network and an I5DN network.

(Means and effects for solving the problem) In order to achieve the above-mentioned object, the present invention provides a facsimile apparatus equipped with a facsimile communication function in G4 mode.
The G4 interface, the ISDN interface that controls the connection between the 15DN network and the 64 interface, the DDX interface that controls the connection between the DDX network and the 64 interface, and either the ISDN interface or the DDX interface selectively becomes the 64 interface. Switching means to connect and ISD
switching control means for detecting an incoming call to the N interface and controlling the switching means; the switching means normally connects a DDX interface to the G4 interface, and the switching control means detects an incoming call to the ISDN interface; When this happens, the ISDN interface 11 is connected.

According to such a configuration, since the G4 interface 10 and the DDX interface 12 are normally connected, when image information arrives at the DDX interface,
The image information is input to the G4 interface via the switching means.

On the other hand, when image information arrives at the ISDN interface, the switching control means detects this and controls the switching means,
Since the G4 interface and the ISDN interface are connected, image information is input to the G4 interface via the switching means.

Therefore, data from the DDX network and data from the ISDN network are reliably input to the 64 interface, making it possible to provide a facsimile device that can be connected to both the DDX network and the I5DN network.

(Embodiment) FIG. 1 is a functional block diagram showing the basic configuration of the present invention. Although the present invention relates to a facsimile device,
In order to make the explanation easier to understand, only the configuration related to the present invention is shown in the figure, and other configurations are omitted.

In the figure, a facsimile control section 14 collectively represents control means that performs various controls on the facsimile machine.

A G4 interface (I/F) 10 performs transmission control based on the 04 mode between the main body of the facsimile machine and the communication network. l5DN interface 11 is l5DN
The connection between the network 16 and the 64 interface 10 is controlled. The DDX interface 12 connects the DDX networks 17 and 64.
Controls the connection with the interface 10.

The switching control means 15 detects an incoming call on the ISDN interface 11 and controls the switching means 13. Switching means 1
3 normally connects the G4 interface 10 and the DDX interface 12, and when the switching control means 15 detects an incoming call of 15DN, the contact is switched to connect the 64 interface 10 and the ISDN interface 11.

In this configuration, the contact point of the switching means 13 has been described as being normally connected to the DDX interface 12 side, but this is for the following reason.

That is, in the ISDN interface 11, as will be described in detail later, transmission control is performed with the transmitting station using the LAPD procedure or the like prior to transmitting and receiving data. and,
Since the incoming call is determined during this process, there is no problem in switching the contacts of the switching means 13 after that.

On the other hand, the DDX interface 12 is simply a level converter and does not have the ability to determine incoming calls like the ISDN interface 11 described above. Therefore, the DDX incoming call is determined by the DDX interface 12.
This must be performed at a subsequent stage, that is, the G4 interface 10 or the facsimile control unit 14.

As a result, in order to perform incoming call determination by DDX at the downstream stage of the DDX interface 12, it is necessary to always input data from the DDX network to the downstream stage, and the above-described configuration is adopted.

Below, in such a configuration, ■DDX reception, ■D
DX transmission, ■l5DN reception, and ■l5DN transmission will be explained in order.

■DDX reception DDXil to DDX interface 12! When the digital image information from 17 is input, since the switching means 13 connects the G4 interface 10 and the DDX ink face 12, the G4 interface 10 detects this and notifies the facsimile control section 14.

The digital image information is input to the facsimile control unit 14 via the switching means 13 and the G4 interface 10,
Here, the digital image information is recorded.

■DDX transmission The facsimile control unit 14 outputs a call request to the 04 interface 10, and the G4 interface 10 sends the DDX
A call is made to the other party's station via the interface 12. When the line with the other party is connected, the facsimile control section 14 reads the image information and sends out the digital image information.

■l5DN Reception I S D N A > 9 7 Ace 11 D I S
When digital image information from the DN network is input, the corresponding I
The SDN interface 11 detects this and performs connection processing with the transmitting station, and when the line is connected, the switching control means 1
5 of incoming call detection and line connection.

When the switching control means 15 receives the incoming call detection etc., the switching means 13
Switch the contacts of 64 interface 10 and IS
Connect with the DN interface 11. As a result, the digital image information is input to the facsimile control section 14 via the switching means 13 and the G4 interface 10, where the digital image information is recorded.

■I The SDN sending facsimile control unit 14 sends the l5DN to the switching control means 15.
Upon notification of transmission, the switching control means 15 controls the switching means 13 to switch its contact to the ISDN interface 11 side.

Thereafter, the facsimile control unit 14 outputs a call request to the G4 interface 10, and
makes a call to the other station via the ISDN interface 11. When the line with the other party is connected, the facsimile control section 14 reads the image information and sends out the digital image information.

FIG. 2 is a block diagram of a facsimile machine that is an embodiment of the present invention.

As is well known, a facsimile machine operating in G4 mode has a G4 interface 22 and a reading section 2 such as a scanner.
8. Equipped with a recording unit 27 such as a printer, an image processing unit 23 that compresses/expands image information, and a system control unit 21 that controls these, the control program is stored in the ROM 29, and the work area is provided in the RAM 30. .

Further, in this embodiment, an ISDN interface 25, a DDX interface 26, and a switching section 24 are provided to enable connection to both the ISDN network 16 and the DDX network 17.

Note that, for the reasons described above, the DDX interface 26 and the 04 interface 22 are normally connected by the switching unit 24.

The image information reception process and transmission process in the facsimile machine having such a configuration will be explained below using the flowcharts shown in FIGS. 3 and 4, respectively.

In the case of reception processing, in the flowchart of FIG. 3, in step SIO, it is detected whether there is an incoming call via the ISDN network or the DDX network. When an incoming call is detected, it is determined in step Sll which line network the incoming call is via.

Note that in an actual system, the determination of incoming calls by the I5DN network is performed at the ISDN interface 25, and the determination of incoming calls by the DDX network is performed by the G4 interface 22, so the determination process in the order of steps S10 and S11 is Either it doesn't exist, or it is written like this here to make the explanation easier to understand.

In step S12, LAP (Ljnk AccessPr) using the D channel is established between the ISDN interface 25 and the ISDN interface of the transmitting station.
Transmission control using the otocol (hereinafter abbreviated as LAPD) procedure is started.

Note that transmission control using LAPD and the LAPB procedure described later is well known, so a description thereof will be omitted.

In step S13, matching of the phases between the two is checked, and if the phases match, step S14
If there is a mismatch, the process ends.

In step S14, the ISDN interface 25 and the ISDN interface of the transmitting station are connected via the ISDN network, and in step S15, the system control unit 21 is notified of ISDN incoming call detection and line connection.

In step S16, the system control unit 21 that has received the notification controls the switching unit 24 to switch its contacts, and
SDN interface 25 and 64 interface 2
2 is connected.

In step S17, the G4 interface 22 and the transmission 1
Transmission control using the LAP (hereinafter abbreviated as LAPB) procedure using the B channel is started with the 04 interface of the 'R station.

In step 81g, it is determined whether the phases match. If the phases match, reception of image information is started in step S19, and if they do not match, the process ends.

In step S20, the transmission speed of the received image information is
128 Kb/ at SDN interface 25
s to 64 Kb/s. In step S21, the received image information is expanded by the image processing section 23, and in step S22, the image information is recorded in the recording section 27.

When all image information has been received and recorded, step S
23 controls the system control section 21 or the switching section 24 to switch its contacts, and connects the DDX interfaces 26 and 04.
The interface 22 is now connected again.

Further, when an incoming call from the DDX network is detected in step S11, transmission control based on the LAPB procedure is started in step S24 in the same manner as described above, and step S2
In step 5, phase matching is determined by the LAPB procedure.

If the phases match, reception of image information is started in step S26, and if they do not match, the process ends.

In step S27, the signal level of the image information is shifted for 64 mode in the DDX interface 26,
In step 32g, the image information is expanded in the image processing section 23, and in step S29, the image information is recorded in the recording section 27.

On the other hand, in the case of transmission processing, in the flowchart of FIG. 4, in step S41, the presence or absence of a transmission request by the 15DN network or the DDX network is detected.

When a transmission request is detected, it is determined in step S42 which line network the transmission request is transmitted through.

If the request is for transmission via the 15DN network, transmission in G4 mode is specified in step S43, and in step S44, the ISDN interface 25 and the ISD of the receiving station are specified.
Transmission control using the LAPD procedure is started with the N interface.

In step S45, it is checked whether the phases match between the two, and if the phases match, step S46
If there is a mismatch, the process ends.

In step S46, the ISDN interface 25 and the ISDN interface of the receiving station are connected via the ISDN network, and in step S47, the system control unit 21 is notified of the line connection.

In step S48, the system control unit 21 that has received the notification controls the switching unit 24 to switch its contacts, and
SDN interface 25 and 64 interface 2
2 is connected.

In step S49, transmission control based on the LAPB procedure is started between the G4 interface 22 and the 64 interface of the receiving station.

In step S50, it is determined whether the phases match. If the phases match, the reading section 28 starts reading the image information in step S51, and if they do not match, the process ends.

In step S52, whether the read image information or the image processing unit 2
In step S53, the transmission speed of the image information is set to 64 in the ISDN interface 25.
It is converted from Kb/s to 128 Kb/s and then sent out in step S54.

When all image information has been read and exited, in step S55, the system control unit 21 controls the switching unit 24 to switch its contacts, and the DDX interface 26 and 64 interface 22 are reconnected.

Furthermore, when transmission via the DDX network is specified in step S42, transmission control using the LAPB procedure is started in step S56 in the same manner as described above, and step S5
In step 7, matching of phases is determined by the LAPB procedure.

If the phases match, reading of image information is started in step 55111, and if they do not match, the process ends.

In step S59, the read image information is compressed in the image processing section 23, in step S60, the signal level of the image information is shifted in the DDX interface 26, and in step S61, the image information is sent out.

According to the present invention, data from the DDX network and l5DN
Since data from the network is reliably input to the 64 interface, it becomes possible to provide a facsimile machine that can be connected to both the DDX network and the ISDN network.

(Effect of the invention) As is clear from the above explanation, according to the present invention, the IS
Either the DN interface or the DDX interface is configured to be selectively connected to the 64 interface, and normally the DDX interface is connected to the 64 interface, and when an incoming call from the ISDN network is detected, the connection is switched. I did it like that.

Therefore, data from the DDX network and data from the 15DN network are reliably input to the 64 interface,
It becomes possible to provide a facsimile device that can be connected to both the DDX network and the 15DN network.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram of the present invention, FIG. 2 is a block diagram of an embodiment of the present invention, FIG. 3 is a flowchart for explaining reception control according to the configuration of FIG. 2, and FIG. 3 is a flowchart for explaining transmission control according to the configuration of FIG. 2. FIG. 10...G4 interface, 11...I SD
N interface, 12... DDX interface, 13... switching means, 14... facsimile control section, 15... switching control means, 16... l5DN network,
17...DDX network

Claims (1)

[Claims] (1) A facsimile device equipped with a facsimile communication function in the G4 mode, which includes a G4 interface that performs transmission control based on the G4 mode, an ISDN interface that controls the connection between the ISDN network and the G4 interface, a DDX network and the G4 D that controls the connection with the interface
DX interface, switching means for selectively connecting either the ISDN interface or the DDX interface to the G4 interface, and switching control means for detecting an incoming call to the ISDN interface and controlling the switching means, The facsimile apparatus is characterized in that the switching means normally connects the DDX interface to the G4 interface, and connects the ISDN interface when the switching control means detects an incoming call to the ISDN interface.