JPH03270458A - User velocity switching system for facsimile for dealing with isdn - Google Patents

Abstract

PURPOSE:To enable communication without any burden on an operator by preparing call set information by setting velocity information corresponding to the facsimile of an ISDN, controlling velocity change at the time of transmission and executing reception at the time of reception corresponding to velocity set by a called party. CONSTITUTION:A line control means 14 transmits the call set information including the velocity information set to a velocity setting means 12 to an ISDN network by a D channel. At such a time, the picture data of the facsimile is converted to the set operational velocity by a velocity converting means 13 and outputted from the line control means 14. Next, in the case of reception, when the user velocity set to the call set information is not designated, the reception is executed at the original velocity of this terminal. When the specified velocity is set as the user velocity, the set velocity information is supplied to the velocity converting means 13 and controlled so as to execute correspondent velocity conversion. Thus, the communication can be executed without any burden on the operator.

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] This invention relates to a user speed switching method by a factor ξ that is compatible with ISDN.

without the operator having to judge the speed of the user on the other end.
The object of the present invention is to provide a user speed switching method for an ISDN-compatible facsimile machine that automatically operates in a mode according to the user speed of the other party.

For facsimiles that make and receive calls in circuit-switched mode using an ISDN international connection, call settings are performed using a dial identification means that identifies that the dialing information used to call the other party's facsimile represents a specific area at the time of a single call, and an identification output of the specific area by the dial identification means. 8. The speed converting means comprises a speed setting means for setting a user speed of information to a user speed of the specific area, and a speed converting means controlled to convert a transmission speed of facsimile data to the user speed of the specific area. is configured to be controlled by the user speed included in the received call setup information.

[Industrial Application Field] The present invention relates to a factor ξ user speed switching system compatible with ISDN.

In recent years, ISDN (Integrated
5 services Digital Network)
The corresponding network is expected to be used in a wide range of fields. This ISDN network can be interconnected as an international link.

Multimedia communications such as voice, facsimile, and data are carried out. A high-speed facsimile called 04 has been developed to perform facsimile communication on ISDN.
Generally, in Japan and many European countries, 64Kbps (kilobyte per second) is used as the ISDN user speed (speed of the terminal device used by the user), while in some countries such as the United States, country is 56Kb
A user speed of ps is adopted.

For this reason, when performing facsimile communication using ISDN, it has been impossible to successfully connect facsimiles of different user speeds due to this difference in speed.

[Prior Art] In ISDN, a channel for transmitting information (called a B channel) and a channel for transmitting control information (called a D channel) are generally separated.

In Japan, communication is performed using at least one line using 28+D multiplexing, consisting of two 64 Kbps B channels and one 16 Kbps D channel. The B channel is used to transfer various types of digital information such as voice (telephone) and facsimile. The B channel is used in circuit switching mode, packet switching mode, and leased line mode.

The D channel is used in circuit switching mode to transfer control information such as call setup response and disconnection, and can also be used as a user packet information channel.

FIG. 5 shows a facsimile communication procedure in the conventional ISDN circuit switching mode.

A in Figure 5 shows the user speed when the communication speed of the own terminal is 64KbpS. Does it include an item for setting (declaring user speed), but does not specify anything for that item (user speed specification L)? When you put it into ISDNlil,!
In SDNw4, the terminal on the other end of the network is captured as is, and its call setup information is transmitted (via the D channel).

If the other party's terminal that receives this call setting information is able to receive the call, it returns a response to the ISDN indicating that it can receive the call.
The DN cable notifies the two calling terminals of the response from the other party's terminal, and notifies the other party's terminal of a response confirmation confirming that the response has been received. Thereafter, data transfer is performed between the own terminal and the other terminal via the B channel.

When this data transfer is completed, the own terminal (calling terminal) notifies the lsDNw4 of disconnecting one line (via the D channel), the ISDIIM notifies the other terminal as is, and when the other terminal releases the line, the ISDIIM sends a notification to the lsDNw4 to disconnect the line. to notify your terminal. After this, when the release of the own terminal is completed, the communication is notified to the ISDN network and the other terminal.

In Figure 5B, the user speed of the own terminal is 56Kbps (such user speed is adopted in limited countries such as the United States), and the user speed of the call setup information is set to 56Kbps.
When set to bps and sent to the network, one communication partner receives 64Kb.
This is an example of a communication procedure when the terminal supports PS.

In this case, the other party's terminal compares the user speed included in the call setup information with its own user speed and, since they do not match, returns a disconnection response to the ISDN network as a terminal attribute mismatch.
The SDN network transmits this response as is to its own terminal (originating terminal). When the receiving terminal receives and identifies this, it sends a release message, and when the receiving terminal receives this, it returns a release completion message, and when the receiving terminal receives this from the ISDN network, it terminates the connection operation. do.

Next, C in Fig. 5 is similar to B above, when the own terminal is 56
Set the user speed of Kbps and connect to the other party's terminal (64Kbps).
The following describes the procedure when the other terminal detects an attribute mismatch and does not respond when call setting information is input for connecting to a user with a user speed of s.

In this case, the ISDN network waits for a response for a predetermined period of time, and if there is no response, a disconnection message is sent to the originating terminal.
Release procedures will be carried out.

Figures 5A to 5C are for the case where the user speed of the other party's terminal is 64 Kbps, but if the other party's user speed is 56 Kbps and the calling terminal is 64 Kbps, the user speed of the other party's terminal is 64 Kbps, similar to B or C in Fig. 5 above. communication cannot be executed.

[The problem that the invention seeks to solve! ] As described above, in the conventional ISDN circuit switching mode, a connection cannot be established unless the user speed declared by the originating terminal and the user speed of the other party's terminal match.

In particular, in the case of 2 international connections, the user speed is 64Kbps in Japan, Europe, etc., but 5 [1Kbps] in North America etc.
s has been adopted, so when making an international connection from Japan, there was a problem in that even if the destination country declared 64Kbps and made a call to a destination country that had 56Kbps, the connection would not be established.

As a solution to this, when the operator makes a call.

When making a call knowing in advance the user speed supported by the other party, there is a method of specifying the other party's user speed to the facsimile machine. However, when an operator makes a call to various countries, it becomes complicated to judge the user speed in each destination country, and there is a problem in that there is a possibility of making incorrect specifications.

SUMMARY OF THE INVENTION An object of the present invention is to provide a user speed switching system for an ISDN-compatible facsimile machine that automatically operates in a mode according to the user speed of the other party without the operator having to judge the user speed of the other party.

[Means to solve the problem] FIG. 1 is a schematic diagram of the principle of the present invention.

In FIG. 1, 10 is a dial information storage unit.

Reference numeral 11 denotes a dial identification means for identifying based on dial information that the destination terminal is in a specific area different from the user speed of the own terminal; 111 a table for identifying a specific area where the user speed differs; and 12, the identification means identifies the destination terminal. speed setting means for setting the speed information in the call setting information to a speed corresponding to the specific area based on an output identifying that the area is in the specific area;

I3 is speed conversion means 1 for converting the user speed of facsimile data transmitted and received into the user speed of the specific area based on the output of the identification means for identifying the specific area.
Reference numeral 4 denotes a line control means for controlling transmitted and received information.

The present invention identifies dialing information when making a call from a facsimile, detects that the user speed of the other party's terminal is different from that of the own terminal, sets the user speed in call setting information, and performs call setting. The user speed of the facsimile meeting information is changed to the user speed of the other party's terminal before transmission, and upon reception, the receiving speed is converted to the user speed designated by the other party's terminal.

[Operation] In FIG. 1, when making a call using an ISDN international connection, dial information specifying a destination terminal is stored in the dial information storage means IO. This dial information is checked by the dial identification means 11 against the dial information registered in the chiffle 111. This table consists of a specific region (or country) represented by a one to three digit number at the beginning of the dial, and the special user speed adopted in that region.

This dial identification means 11 includes a dial information storage section 10.
The dial numbers for the other party's area stored in Table 1
11, and if they match, the speed setting means 12 is set to a corresponding special speed. In addition, the speed conversion means 13
It generates an output that controls the operating speed so that it operates at a specific speed.

The line control means 14 transmits call setting information including the speed information set in the speed setting means 12 to the ISDN network via the D channel. After the call setup is transmitted, when the other party responds and the connection is completed, facsimile data is transmitted via the B channel. At this time, the facsimile image data is converted by the speed converting means 13 to the operating speed set above and output from the line control means 14. In that case.

Even though the transmission speed of ISDN is 64Kbps.

The transmission speed of facsimile data is 56 Kbps.

Next, in the case of reception, in the 9 line control means 14.

When receiving call setup information from the other party's facsimile terminal,
The user speed configured in that call setup information.

If not specified, the original speed of this terminal (64Kbps)
When specific speed information is set as the user speed, the set speed information is supplied to the speed conversion means 13 and controlled to perform the corresponding speed conversion. In this case, a reception operation corresponding to the speed of the other party is performed.

[Example 1 Figure 2 is a hardware configuration diagram of the example, Figure 3 (a),
FIG. 3(b) is a processing flow diagram of the embodiment, and FIG. 4 is a configuration example of a data table.

In FIG. 2, 20 is a microprocessor unit (
21 is a key for numerical values, etc., 22 is a key manual control circuit, 23 is a liquid crystal (LCD) display screen that displays key manual input, operation mode, etc., 24 is a display control circuit, and 25 is a memory for facsimile data files. , 26 is a communication control unit that is connected to the line to the ISDN network and controls the transmission and reception of information data and control signals, 27 is a speed conversion circuit provided according to the present invention, and 28 is a program ROM for controlling the MPU 20. , 29 is a program work memory (consisting of RAM) used in the program operation of the MPU 20, 30 is a data table memory (consisting of RAM) storing a table for identifying dial information according to the present invention, 31 is character image RO
M32 is a CG (character generator) expansion circuit that expands the image data and generates character data; 33 is a compression/decompression circuit that compresses facsimile data using various compression methods (MMR, MH, etc.) at the time of transmission and decompresses it at the time of reception; 34 is a recording control circuit that outputs the received and restored facsimile data to the printer 35, and 36 is a reading control circuit that scans the transmission document with the scanner 37 and generates a transmission signal.

Each part of the facsimile terminal is controlled by the program processing of the MPLJ 20, and the processing flow of this embodiment is shown in FIG. 3, and the contents of the data table used in this processing will be explained using FIG. 4.

FIG. 4A shows the structure of a data table, and FIG. 4B shows a correspondence table between codes representing user speeds and speeds.

In the data table, the number of registered numbers is first stored in hexadecimal format in ASCII code (H is added after the number). In this example, three numbers are registered.

After this, a total of three dial numbers from the 0th registered dial to the 2nd registered dial are stored in order, and the 0th registered dial is r(12H" (2 digits) as a 9-digit number, and the registered dial number is r30H, r31H, so the numbers ``0'' and ``rl'' represent 5, and the user speed at this time is ``OF'', which is 55 Kbps according to the table of B.

Below, the number of digits for the first registration dial is "3".

Registered dial number is r044J, user speed is r
OEHJ and 48Kbps. The second registered dial has two digits, the dial number is ro 2J, the user speed is ro 1 HJ, and the second speed is 0°6 Kbps.

Next, the processing flow of the embodiment shown in FIGS. 3(a) and 3(b) will be explained.

First, in FIG. 3(a), processing is started and it is determined whether or not signal data has been received (40 in FIG. 3(a)).
, which determines whether any signaling data (control information) has been received on the D channel, and if so, determines whether the signaling data is "call setup" information from the ISDN network. If it is a "call setup", the process moves to the reception process shown in Figure 3 (see 41) according to the route (■), but if the signal data is not received or the signal data is received and the "call setup" is not received. 2 Determine whether there is a call instruction (42
). If there is a 3 call instruction (information such as dialing of the other party's terminal is set), this facsimile
Processing for performing transmission via SDN is started.

First, set register i (set in the program work memory 29 in FIG. 2) to O (43).

It is determined whether i is smaller than the number of registered data stored in the data table shown in FIG. 4 (the number of registered data is 3 in FIG. 4) (44).

i<Number of registered data, compare the i-th dial in the data table and the other party's dial from the beginning (45
), here, if the first dial in the data table and the beginning of the dial of the person receiving the call instruction do not all match, i is +1 and the same process is performed for the next registered dial (same 48) If there is a match, the i-th user speed that matches is specified and a "call setup" is sent (49).

If i≧the number of registered data, that is, if it does not match all the dials registered in the data table, "User speed is not specified" (in this case, 1 is usually 64K).
46).

After this transmission, it is determined whether or not signal data has been received from ISDN #i4, and if "response" information is received, it is determined that the other party's terminal has responded, and the speed conversion circuit ( Set 27) in Figure 2 (see 56).
, data transfer processing is executed via the B channel (same 5
7).

After this, when the transfer is completed, a "disconnect" is sent via the D channel, and then the signal data is monitored to see if it is received.
When the signal is received and the content is "release", "release completed" is sent (60 to 62), and the state returns to the initial state (40).

After sending the above "Call Setup", if you receive "Disconnect" without receiving "Response" from the other party, or if you send "Release" and then receive "Release Complete", the first Return to state (52-55).

Next, in FIG. 3(b), when call setting information is received from the other party, it is determined whether "user speed" is set therein (63 in FIG. 3(b)). If the speed has been set, the speed conversion circuit (FIG. 2, 27) is set to the specified speed, and if it is not set, the speed conversion circuit is set to 64 Kbps (FIG. 2, 65).

After this, a "response" will be sent to ISDN (66),
Wait for "response acknowledgment" to be received as signal data (
67.68), and when the receiver receives the "response confirmation," it performs facsimile data transmission processing via the B channel (69
), receive facsimile data. In this case, the received data is either to be stored in the file memory 25 shown in FIG. be exposed.

When the data transmission process is completed and "Disconnect" is received from the ISDN network, "Release" is sent and "Release Complete" is received (72.7376-7), facsimile data reception processing ends. and the first state indicated by ■ (
Return to 40) in FIG. 3(a). Also, step 68 above
``Release'' is received without receiving ``Response Acknowledgment'' in step 73, or ``Release'' is received without receiving ``Disconnect'' in step 73.
If received, "Release Complete" is sent and the state returns to the initial state indicated by ■.

[Effects of the Invention] According to the present invention, even if the operator does not know the user speed supported by the other party, when making a single call, ISDN factor calculation sets the corresponding speed information to create call setting information, and the speed Conversion is controlled, and reception is performed according to the speed set by the other party, so communication is possible without any burden on the operator.

[Brief explanation of drawings]

Figure 1 is a diagram of the principle configuration of the present invention, Figure 2 is a hardware configuration diagram of an embodiment, Figures 3(a) and 3(b) are processing flow diagrams of the embodiment, and Figure 4 is a data table. Configuration example, 5th
The figure shows a facsimile communication procedure in ISDN circuit switching mode. In Figure 1. 10: Dial information storage section 11: Dial identification means 111: Table 12: Speed setting means 13: Speed conversion means 14: Line control means

Claims (1)

[Scope of Claims] In a user speed switching system for ISDN-compatible facsimiles, facsimiles that make and receive calls in circuit-switched mode using ISDN international connections are provided with a dial that identifies that the dialing information for calling the other party's facsimile represents a specific region when making a call. an identification means (11); a speed setting means (12) for setting the user speed of the call setting information to the user speed of the particular region based on the identification output of the particular region by the dial identification means (11); and a transmission speed of facsimile data. speed converting means (13) controlled to convert the speed to the user speed of the specific area, and when receiving a call, the speed converting means (13) is controlled by the user speed included in the received call setting information. A user speed switching method for an ISDN compatible facsimile machine.