JPH0832790A - G4 facsimile communication controller - Google Patents

Abstract

PURPOSE:To improve flexible connectivity and selectivity as to a G4 facsimile communication controller - a G4 facsimile relative device. CONSTITUTION:The G4 facsimile communication controller 11 which have a facsimile communication with a G4 facsimile equipment 14 connected to a domestic communication network 12 or a G4 facsimile equipment 15 connected to an international communication network 13 automatically decides the communication mode (communication speed and communication procedure) of the opposite facsimile equipment before having the communication. The G4 facsimile communication control automatically switches itself to the communication mode to make possible the automatic facsimile communication irrelevantly to whether the line is a domestic or international ISDN.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a G4 facsimile communication control device for exchanging data with a G4 facsimile related device such as a G4 facsimile.

[0002]

2. Description of the Related Art Transmission and reception of facsimile data by ISDN is generally performed by the G4 facsimile protocol, but since the communication speed is different between a domestic ISDN line and an international ISDN line, it is necessary to perform a switching operation during transmission and reception. is there.

Conventionally, in the G4 facsimile, the communication speed at the time of transmission is switched between 64 Kbps and 56 Kbps, and the ITU in the data communication procedure based on the switching.
-T recommendation T. 90 mode and T.I. Switching to the 70 NULL mode has been performed by setting from an operation panel provided in the apparatus.

[0004]

In such a conventional method, the communication speed and the data communication procedure are manually switched, or only the communication according to the preset data communication procedure can be performed, and the G4 facsimile related apparatus is used. There was a problem in the flexibility of switching the connection method.

An object of the present invention is to provide a G4 facsimile communication control device which can be connected to various G4 facsimile related devices and can flexibly switch arbitrary transmission speeds and data communication procedures.

[0006]

SUMMARY OF THE INVENTION The present invention comprises a host device and an S
In the G4 facsimile communication control device which is connected by the CSI interface and transmits / receives data via the ISDN basic interface according to the control instruction from the above-mentioned upper device, the data reception at the communication speed of 56 Kbps by the international ISDN or the data at the communication speed of 64 Kbps by the domestic ISDN is performed. A means for automatically determining the reception speed by judging whether it is reception or not, and a communication speed of 56 Kb according to the international ISDN when making a call.
ps data transmission or domestic ISDN communication speed 64K
means for discriminating whether the data is bps data and arbitrarily switching the transmission speed.

[0007]

With the above configuration, the communication speed and data communication procedure in the G4 facsimile protocol can be arbitrarily set, and
It becomes possible to switch automatically, and thus the user can perform the connection operation of the G4 facsimile or the G4 facsimile related apparatus without being aware of the line type or the like.

[0008]

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

FIG. 1 is a diagram showing a system configuration example of a G4 facsimile communication control apparatus of the present invention. 2 to 5
6 is a flowchart showing the operation of the G4 facsimile communication control device of the present invention. 6 to 11 show a G4 facsimile communication control device and a communication line (ISD) of the present invention.
It is a figure which shows the operation sequence between (N basic interface).

In FIG. 1, reference numeral 10 denotes a host device for controlling the G4 facsimile communication control device, which is composed of, for example, a personal computer, a workstation or the like. Reference numeral 11 denotes a G4 facsimile communication control device (hereinafter referred to as "this device") according to the present invention, which is provided with a protocol conversion function and an encoding function that enable mutual connection between the higher-level device 10 and the G4 facsimile. Is.
12 is a domestic ISDN basic interface communication network, 13 is a foreign ISDN basic interface communication network, and 14 is a G4 connected to the domestic communication network 12.
Facsimile and 15 are G4 facsimiles connected to the foreign communication network 13, respectively. The domestic communication network 12 and the foreign communication network 13 are interconnected,
It forms a network that can communicate with each other.

Next, the operation of the present invention will be described based on the flowcharts of FIGS. 2 to 5 and the sequences of FIGS.

FIG. 2 is a flow chart showing the operation when the device 11 detects an incoming call from the other party's G4 facsimile 14, 15 and determines the communication speed of the device 11.
FIG. 6 is an outline of the operation sequence in that case.

First, when the device 11 detects an incoming call (step 20), a call setting signal from the communication network 12 (see FIGS. 6 and 6).
0) is received. At this time, the communication speed parameter of the partner device included in the received signal is analyzed, and it is determined whether the content is the speed at which communication is possible (step 21). According to this determination, if the communication speed is the speed at which the device 11 is normally used (default value) (step 22), the incoming call is unconditionally accepted (step 24).

On the other hand, in step 22, in case of no,
It is determined whether the communication speed of the device 11 is set as the receivable speed (step 23), and if the communication speed is available, the incoming call is accepted (step 24), and then the call signal (FIG. 6, FIG. 6) is given to the communication network 12. 61) and the response signal (FIGS. 6 and 6)
2) is returned. At this time, the response signal (see FIG.
The communication speed designated by the call setting signal (60 in FIG. 6) is added to the parameter in 2). Further, in the determination of step 23, if it is recognized that communication is impossible, the incoming call is rejected (step 25).

FIG. 3 is a flow chart showing the operation when the communication speed is set when the device 11 makes a call to the other party G4 facsimiles 14 and 15, and FIG.
It is an outline of an operation sequence in that case.

There are four methods for arbitrarily setting the communication speed when transmitting from the device 11. That is, first, command parameter setting from the host, second, setting by a dip switch built in the device 11, and third, memory switch by a key panel (not shown) provided in the device 11. The fourth is the arbitrary switching according to the destination (FIG. 7, 70).

First, in the call preparation state, the host device 1
Call activation is started from 0 to this device 11 (step 3).
0). Then, in order to set the communication speed for the communication network 12, the communication speed is set by one of the setting methods shown in FIGS. 7 and 70 (step 31), and the value is the default speed, or By determining whether it is other than (step 32), it is determined whether or not the transmission capacity is set for the communication network 12 (step 33).
The communication speed set to low layer compatibility is set for 2 (step 34), and the transmission process is performed for the communication network 12 (step 35).

FIG. 4 is a flow chart showing the connection processing of the B channel after this device 11 receives an incoming call from the other party's G4 facsimiles 14 and 15, and FIGS. 8 and 9 are the outline of the sequence at that time. .

After this device 11 detects an incoming call from the partner device (step 40), first the D channel is logically connected (step 41), and the link level connection processing of the B channel (FIGS. 8, 80 and 81). Is performed (step 42).

Then, it is determined whether or not the SI packet (82 in FIG. 8) is received from the partner device via the communication network 12 (step 43). As a result of this determination, if the SI packet is received, the T. Communication processing is performed according to the communication procedure in the 90 mode (step 46). Also, step 43
When it is recognized that the SI packet is not received, it is then determined whether the CN packet (82 in FIG. 8) is received (step 44). As a result of this determination, when the CN packet is received, the T. Communication processing is performed according to the communication procedure in the 90 mode (step 46).

When it is recognized in step 44 that the CN packet is not received, it is then determined whether the DT packet (TCR block) (FIG. 9, 93) is received (step 45), and the DT packet is received. If,
T. Communication processing is performed according to the communication procedure in the 70 NULL mode (step 47). On the other hand, if it is recognized in step 45 that the packet is not a DT packet, processing relating to incoming call rejection is performed (step 48). in this way,
Determine the communication processing mode according to the received packet,
According to the communication procedure in this mode, the B channel is connected and communication is performed (step 49).

FIG. 5 is a flow chart showing the operation in the case where the present apparatus 11 makes a call to the other party's G4 facsimiles 14 and 15 and sets a communication procedure and performs communication, and FIGS. Is an outline of the sequence of.

As described above, there are four types of communication procedure setting methods for making a call from the device 11 (FIGS. 10 and 104: FIGS. 11 and 115).

First, as a call preparation, the host device 10 activates the call to the device 11 (step 50).
After that, the D channel is connected to the partner device (step 51), and the communication procedure is set by one of the setting methods shown in FIGS. 10 and 104 or FIGS. 11 and 115 (step 5).
2). Next, in order to recognize the type of communication procedure, 7
It is determined whether the communication procedure is 0 NULL mode (step 5).
3). As a result, the T. If it is recognized that the communication procedure is in the 70 NULL mode, the T.70. The communication procedure of 70 NULL mode (FIGS. 11, 112 and 113) is executed (step 5).
5), T.S. If it recognizes that it is not in the 70 NULL mode, the T.70. Communication procedure in 90 mode (Fig. 10, 102,
103) is executed (step 54), and the facsimile communication is started (step 56).

[0025]

As described above, according to the present invention, in the G4 facsimile communication control device, it is possible to obtain a communication method in which the communication speed and the communication procedure are flexibly connected to the G4 facsimile related products of other companies and the selectivity is excellent. .

[Brief description of drawings]

FIG. 1 is a diagram showing a system example of a G4 facsimile communication control device of the present invention.

FIG. 2 is a flowchart showing an example of a processing procedure in the G4 facsimile communication control apparatus of the present invention.

FIG. 3 is a flowchart showing an example of a processing procedure in the G4 facsimile communication control apparatus of the present invention.

FIG. 4 is a flowchart showing an example of a processing procedure in the G4 facsimile communication control apparatus of the present invention.

FIG. 5 is a flowchart showing an example of a processing procedure in the G4 facsimile communication control apparatus of the present invention.

FIG. 6 is a diagram showing a sequence between a G4 facsimile communication control device and a communication line of the present invention.

FIG. 7 is a diagram showing a sequence between a G4 facsimile communication control device of the present invention and a communication line.

FIG. 8 is a diagram showing a sequence between a G4 facsimile communication control device of the present invention and a communication line.

FIG. 9 is a diagram showing a sequence between the G4 facsimile communication control device of the present invention and a communication line.

FIG. 10 is a diagram showing a sequence between the G4 facsimile communication control device of the present invention and a communication line.

FIG. 11 is a diagram showing a sequence between the G4 facsimile communication control device of the present invention and a communication line.

[Explanation of symbols] 10 ... Higher-level device (personal computer, workstation
Etc.) 11 ... G4 facsimile communication control device 12 ... domestic (ISDN basic interface) communication line 13 ... overseas (ISDN basic interface) communication line 14 ... G4 facsimile 15 ... G4 facsimile

Claims (1)

[Claims] 1. An ISD which is connected to a host device by a SCSI interface and which receives a control instruction from the host device.
In the G4 facsimile communication control device which transmits / receives data via the N basic interface, a means for automatically determining the reception speed by determining whether the data reception at the communication speed of 56 Kbps by the international ISDN or the data reception at the communication speed of 64 Kbps by the domestic ISDN is performed. At the time of transmission, a means for discriminating between data transmission at a communication speed of 56 Kbps by international ISDN and data at a communication speed of 64 Kbps by domestic ISDN, and means for arbitrarily switching the transmission speed
A G4 facsimile communication control device comprising: