JPH04315367A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To obtain the facsimile equipment in which a type of B channel communication is discriminated at a receiver side and the result of discrimination is displayed on a display section at setup through a D-channel. CONSTITUTION:This facsimile equipment is provided with D-channel information management sections 7s, 7r setting a B-channel communication type identification data of one octet or 3 octets or over to an information element being a parameter of a setup signal in D-channel communication of an ISDN 1 and the type of B-channel communication is discriminated based on the B-channel communication type identification data at the reception of a setup signal and the result is displayed on display sections 6s, 6r. Facsimile equipments 2, 3 are realized in which the type of the B-channel communication is discriminated based on the B-channel communication type identification data of a received setup signal at the setup through a D-channel and the result is displayed on the display sections 6s, 6r.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Group 4 (hereinafter referred to as G4) facsimile machine connected to an integrated services digital network (hereinafter referred to as ISDN).

0002

[Prior Art] Figure 8 shows a G4 connected to a conventional ISDN.
FIG. 2 is a hardware block diagram showing only a communication interface section of the facsimile device. In the figure, 1 is IS
2 is a G4 facsimile machine on the sending side connected to ISDN1, and 3 is a G4 facsimile machine on the receiving side also connected to ISDN.

[0003] Furthermore, in the G4 facsimile machines 2 and 3 on the sending and receiving sides, 4s and 4r are ISDN
This is a communication control section that controls G4 facsimile communication using the D channel 1, and 5s and 5r are main control sections that perform overall control of this G4 facsimile machine 2 or 3. 6s and 6r are display units that display types of communication such as real-time communication, time-specified communication, sequential broadcast communication, relay request communication, confidential communication, reduced communication, expanded communication, and single/continuous sending.

Next, the operation will be explained. G4 on the sending side
In the facsimile machine 2, in response to a communication start instruction from the main control section 5s, the communication control section 4s sends a call setting signal SETUP to the ISDN 1 as shown in FIG. This call setting signal SETUP is transferred as is to the G4 facsimile machine 3 on the receiving side via the ISDN 1 exchange and relay station.

[0005] The format of the information element, which is a parameter of this call setting signal SETUP, is an information element identifier (information element identifier) as shown in FIG.
identifier ) 11, information element length (Len
gth of information element
t ) 12, and Contents 13
It consists of This information element includes the requested transmission function, the number of the communication partner, the channel number consistency confirmation information desired to be used, and the like.

[0006] ISD that received call setting signal SETUP
N1 confirms the call setting signal SETUP, and
A call setup acceptance signal CALL PROC for indicating the B channel to be used by the G4 facsimile machine 2 on the transmitting side is sent to the G4 facsimile machine 2 on the transmitting side. G on the receiving side
4 After receiving the call setup signal SETUP, the facsimile device 3 generates a response signal CONN and sends it to the ISDN 1.
This response signal CONN is directly transferred from the ISDN 1 to the G4 facsimile machine 2 on the transmitting side.

ISDN1 which received this response signal CONN
sends a response confirmation signal CONN ACK notifying completion of end-to-end path setting to the G4 facsimile machine 3 on the receiving side. On the other hand, the G4 facsimile machine 2 on the sending side, which has received the response signal CONN, next starts communication via the B channel.

[0008] After the B channel communication is completed, the G4 facsimile machine 2 on the sending side sends a disconnection signal DISC to the ISDN 1. After receiving this disconnection signal DISC, the ISDN 1 sends a release signal RE to the G4 facsimile machine 2 on the sending side.
At the same time as transmitting L, G4 facsimile machine 3 on the receiving side
The disconnection signal DISC is sent to

The G4 facsimile machine 2 on the sending side, which has received the release signal REL, sends the release completion signal REL COM to I
Send to SDN1. On the other hand, receiving the disconnection signal DISC, the G4 facsimile machine 3 on the receiving side sends a release signal REL to the ISDN 1. Thereafter, the G4 facsimile machine 3 on the receiving side receives the release completion signal RE from the ISDN 1.
Upon reception of L COM, call release via the D channel is completed.

[0010] Documents describing technology related to such a conventional G4 facsimile device connected to ISDN include, for example, Japanese Patent Application Laid-Open No. 206994/1994.

[0011]

[Problem to be Solved by the Invention] Since the conventional facsimile machine is configured as described above, the G4 facsimile machine 3 on the receiving side can determine the type of communication such as real-time communication or time-specified communication. It is not possible to determine the type of communication when setting up a call using the D channel, and the receiving side's G
Not only is there a delay in displaying the communication type on the display unit 6r on the G4 facsimile machine 3, but the receiving side G4 facsimile machine 3 is required to determine and display whether the received data is real-time transmission or time-specified transmission. There were problems such as the inability to set up a call using a channel.

[0012] This invention was made to solve the above-mentioned problems, and when setting up a call using the D channel,
It is an object of the present invention to provide a facsimile machine that can determine the type of B channel communication in a G4 facsimile machine on the receiving side and display it on a display unit.

[0013]

Means for Solving the Problems A facsimile apparatus according to the invention as set forth in claim 1 includes information elements that are parameters of a call setting signal in ISDN D channel communication.
D to set the B channel communication type identifier in octets
A channel information management section is provided, and when receiving this call setup signal,
The B channel communication type is determined based on the B channel communication type identifier and displayed on the display unit.

[0014]Further, the facsimile apparatus according to the invention described in claim 2 is a D-channel communication device in which a B-channel communication type identifier of 3 or more octets is set in an information element that is a parameter of a call setting signal in ISDN D-channel communication. An information management section is provided, and when receiving this call setup signal, the B
The type of B channel communication is determined based on the channel communication type identifier and displayed on the display unit.

[0015]

[Operation] The D channel information management unit in the invention as claimed in claim 1 sets a 1-octet B channel communication type identifier in an information element that is a call setting signal parameter in ISDN D channel communication, and By enabling the G4 facsimile machine on the receiving side to determine the B channel communication type based on the communication type identifier, the B channel communication type can be determined at the time of D channel call setup and displayed on the display. To realize a facsimile device that can display images.

[0016] Furthermore, the D channel information management unit in the invention according to claim 2 sets a B channel communication type identifier of 3 or more octets in an information element that is a parameter of a call setting signal in ISDN D channel communication. , based on the B channel communication type identifier, the receiving side G
To realize a facsimile device which can discriminate the type of B channel communication at the time of setting a call by D channel and display it on a display part by making it possible to discriminate the type of B channel communication by the four facsimile devices.

[0017]

【Example】

Example 1. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a hardware block diagram showing only a communication interface section of a facsimile machine according to an embodiment of the invention.

In the figure, 1 is an ISDN, 2 is a G4 facsimile machine on the sending side, 3 is a G4 facsimile machine on the receiving side, 4s and 4r are communication control units, 5s and 5r are main control units, and 6s and 6r are display units. Since these parts are the same as or equivalent to those in the conventional system denoted by the same reference numerals in FIG. 8, detailed explanation will be omitted.

In each G4 facsimile machine 2 and 3, 7s and 7r are input by the communication control unit 4 at the time of call setting.
This is a D channel information management unit that sets a 1-octet B channel communication type identifier in an information element as a call setup signal parameter sent to the SDN D channel.

Next, the operation will be explained. Here, the format of the information element which is the call setting signal parameter is shown in FIG. In the figure, 11 to 13 are the same information element identifiers, information element lengths, and information contents as those given the same reference numerals in FIG. Channel communication type identifier (B-ch communication type
identifier).

The coding format of the data at this time is classified in bit units representing the type of communication function of the G4 facsimile machine 2 on the transmitting side, as shown in FIG. That is, bits 1 to 7 in FIG. 3 are bits that indicate each communication type: real-time communication, time-specified communication, sequential broadcast communication, relay request communication, confidential communication, reduced communication, and enlarged communication, and are turned off when set to 0. , "1" turns it on. Bit 8 is a bit indicating single/continuous sending, and is “0”.
"1" means single delivery, "1" means continuous delivery.

A flowchart of the coding of this B channel communication type identifier 14 is shown in FIG. For example, in the case of continuous transmission by time-specified sequential broadcast communication, step ST1,
“No” in ST4 to ST7, step ST2, ST
3. In order to pass to the “Yes” side in ST8, step ST
Only 10, ST11, and ST16 are executed and bit 8
~1 are coded as "1, 0, 0, 0, 0, 1, 1, 0", respectively. This data is set in the B channel communication type identifier 14 described above.

After setting data in this B channel communication type identifier 14, the main control section 5s of the G4 facsimile machine 2 on the sending side instructs the communication control section 4s to start communication. Upon receiving the communication start instruction, the communication control section 4s reads out the information elements of the call setting signal shown in FIG. 2 from the D channel information management section 7, and as shown in FIG. IS the setting signal SETUP
Send to DN1.

[0024] The sent call setting signal SETUP is
It is received by the G4 facsimile machine 3 on the receiving side via DN1. Upon receiving this call setup signal SETUP, the communication control section 4r of the G4 facsimile machine 3 on the receiving side notifies the main control section 5r of the incoming call, and at the same time sends the call setup signal SETUP to the D channel information management section 7r. Send information elements.

The main control unit 5r of the G4 facsimile machine 3 on the receiving side that receives the call notification reads out the information elements of the received call setting signal SETUP from the D channel information management unit 7r. Next, the main control unit 5r determines the type of each communication function based on the data of the B channel communication type identifier 14 included in the information element of this call setting signal SETUP, and sets the B channel communication type identifier 14. The display unit 6r is instructed to light up each display lamp corresponding to the data.

A flowchart of instructions to the display section 6r is shown in FIG. Now, the data of the B channel communication type identifier 14 is “1, 0” for bits 8 to 1, respectively.
,0,0,0,1,1,0'', step ST2
1. Step ST24 to ST27 to “No” side.
22, ST23, and ST28, only steps ST30, ST31, and ST36 are executed. Therefore, the main control section 5r issues a lamp lighting instruction to the display section 6r so as to turn on the time designation lamp, the sequential broadcast lamp, and the continuous transmission lamp, respectively.

Next, the main control unit 5r outputs the calling signal ALE.
RT and notifies the G4 facsimile machine 2 on the sending side via ISDN 1 that the lighting of the communication lamp has ended. The following communication procedure is the same as the conventional communication procedure, so a description thereof will be omitted.

Example 2. Note that in the above embodiment, the B channel communication type identifier is one octet in the information element of the call setup signal SETUP, but it may be three or more octets. FIG. 7 is an explanatory diagram showing an information element format of a call setup signal in ISDN D-channel communication, showing an embodiment of the invention as claimed in claim 2, and the same parts as in FIG. 2 are denoted by the same reference numerals. I have added this to avoid redundant explanations.

In the figure, 15 is a content section (Contents of BCTI) in which various information is set, and 16 is an information length section (Length of BCIT) in which the length of this B channel communication type identifier is set.
It is. Reference numeral 17 denotes a data portion (B-ch communication) in which data for identifying the type of B-channel communication is stored, as described in the embodiment of the invention according to claim 1.
cation type identifier)
It is.

Data for identifying the type of communication on the B channel is set in the data part 17, the number of continuous transmissions and additional communication information is set in the content part 15, and the total information length is set in the information length part 16. to form a minimum 3 octet B-channel communication type identifier 14 to send a call setup signal SE.
It is sent in the information content 13 of the TUP.

[0031] This makes it possible to notify the B channel information of the G4 facsimile machine 2 on the transmitting side to the G4 facsimile machine 3 on the receiving side before B channel communication is started.

[0032]

As described above, according to the present invention, the D channel information management unit is provided, and the information element of the call setting signal in ISDN D channel communication includes one octet or more than three octets for B channel communication. Since the configuration is configured to set a type identifier, when setting up a call using the D channel on the receiving side G4 facsimile machine, it is possible to determine the type of B channel communication based on the B channel communication type identifier of the call setting signal. Therefore, it is possible to obtain a facsimile machine that can display the determination result on the display unit.

[Brief explanation of the drawing]

FIG. 1 is a hardware block diagram showing a facsimile apparatus according to an embodiment of the invention.

FIG. 2 is an explanatory diagram showing the format of information elements of a call setup signal in the above embodiment.

FIG. 3 is an explanatory diagram showing a coding format of a B channel communication type identifier in the information element.

FIG. 4 is a flowchart showing the coding procedure of the B channel communication type identifier.

FIG. 5 is an explanatory diagram showing a communication protocol of the above embodiment.

FIG. 6 is a flowchart showing a procedure for decoding the B channel communication type identifier.

FIG. 7 is an explanatory diagram showing the format of information elements of a call setup signal in an embodiment of the invention as set forth in claim 2;

FIG. 8 is a hardware block diagram showing a conventional facsimile device.

FIG. 9 is an explanatory diagram showing the communication protocol.

FIG. 10 is an explanatory diagram showing the format of information elements of a call setup signal in a conventional facsimile device.

[Explanation of symbols]

1 ISDN 2 Facsimile device (G4 facsimile device on the sending side) 3 Facsimile device (G4 facsimile device on the receiving side) 4s, 4r Communication control section 6s, 6r Display section 7s, 7r D channel information management section

Claims (2)

[Claims] 1. A communication control unit that controls group 4 facsimile communication using a D channel of an integrated service digital network, and a call setting signal that is sent from the communication control unit to the D channel of the integrated service digital network at the time of call setup. A D channel information management unit that sets a 1-octet B channel communication type identifier in the information element of A facsimile machine equipped with a display section that displays. 2. A communication control unit that controls group 4 facsimile communication using a D channel of an integrated service digital network, and a call setting signal that is sent from the communication control unit to the D channel of the integrated service digital network at the time of call setup. A D channel information management unit that sets a B channel communication type identifier of 3 octets or more in the information element of A facsimile machine comprising a display section for displaying the type.