JP2002218100A - Communication terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent generation of communication error in ordinary G3 communication and super G3 communication. SOLUTION: An outside line connection number is registered and a dial number is delivered at the time of facsimile transmission (ST11), the head character string of the dial number is extracted (ST12), a decision is made whether the extracted head character string matches the registered outside line connection number or not (ST13), and ordinary G3 transmission is effected for a call originating from an extension line unless they match each other (ST15) and if otherwise, Super G3 transmission is effected for a call originating from an outside line (ST14).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a communication terminal device such as a facsimile machine.

[0002]

2. Description of the Related Art Generally, in a company office or the like, facsimile machines are provided at various places in the office, and communication is performed between the devices in the office via an internal exchange, and each facsimile machine is connected via an internal exchange. Also communicates with the outside world. In a conventional facsimile machine,
G3 transmission at normal transmission speed and super at high transmission speed (S
upper) Many models can select G3 transmission.

[0003]

In the above-mentioned conventional facsimile apparatus, when a low-cost extension exchange is used and a SuperG3 transmission is performed using an extension, a communication error occurs, and further an error retransmission is performed. There was a problem that an infinite error retransmission state might occur due to the function being activated. This is SuperG3 communication,
It uses a voice band between 300Hz and 3400Hz,
This is because a communication error occurs when transmission is attempted on a line such as an extension line that can transmit only a voice band that does not hinder ordinary conversation for cost reduction.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a communication terminal device which does not cause a communication error depending on a method of selecting normal G3 communication or SuperG3 communication. And

[0005]

A communication terminal device according to the present invention has a line connection unit connected to an extension exchange, and is capable of transmitting an extension and an external line. And a control unit for performing communication control using the first image communication method and using the second image communication method when an external line is connected.

In this communication terminal device, when a call for communication is made, if the call is a call between extensions, a first image communication method, for example, a normal G3 communication method (modulation method: V27ter, V29, and V17), and when the call is an outside line call, communication is performed by a second image communication method, for example, a SuperG3 communication method (V34 method as a modulation method).

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to embodiments. FIG. 1 is a block diagram showing a schematic configuration of a facsimile apparatus with a copying function according to the present invention. This facsimile machine 2 with a copying function
Reference numeral 1 denotes an MPU (control unit) 1, a ROM 2, a RAM 3, an image memory (DRAM) 4, an operation panel (operation unit) 5, a display unit 6 for displaying various data, a bus 7, an NCU 8, a modem 9, a scanner 10, Printer (output unit) 11, COD
An EC 12 and a LAN I / F 13 are provided. Here, RO
M2, RAM3, and image memory 4 constitute a storage unit.
CU8, modem 9, CODEC12, LAN1 / F13
The communication unit is constituted by.

[0008] The MPU 1 controls each unit constituting the device 21, receives data from an external information source through the communication unit, stores the data in the storage unit, and displays the data stored in the storage unit on the display unit 6. It has a function to make Also, from the operation panel 5, a function for taking in an external line connection number, when performing facsimile transmission, check the dial number and determine whether it is an external line transmission or an internal line transmission. It has a function of selecting SuperG3 communication. The ROM 2 stores a program for controlling the device 21. The RAM 3 temporarily stores data and the like. The image memory 4 temporarily stores the image data when transmitting the received image data or the image data read by the scanner 10. The operation panel 5 is for the user to instruct facsimile transmission / reception, printing, and the like. The outside line connection number is also entered here for registration.

The NCU 8 has functions for controlling connection with the telephone line (PSTN) 14 and detecting transmission and reception of a dial signal corresponding to a telephone number (including a FAX number) of a destination. . The modem 9 is an ITU-
Recommendation T. 30 based on a facsimile transmission control procedure according to V.30. 17, V.I. 27ter, V.I. Modulation and demodulation of transmission / reception data according to 29 or the like. In addition, it performs modulation and demodulation of the V34 system. The scanner 10 reads image data of a document when performing fax transmission and copying.
The printer 11 records received image data and image data of a document read by the scanner 10 in a copy operation on a recording sheet. The CODEC 12 encodes (reads) the read image data by MH, MR, MMR, or the like in order to transmit the image data, and decodes (decodes) the received image data.

[0010] The LAN I / F 13 is connected to a LAN network 15 for performing communication via the Internet.

In the facsimile apparatus of this embodiment, FIG.
The external line connection number is registered by executing the processing shown in FIG. In the initial stage of use of the facsimile apparatus (at the time of installation), an outside line connection number registration routine is entered. In step ST1, it is determined whether the outside line connection number registration setting button has been pressed. When the external line connection number registration setting button is pressed, the process proceeds to step ST2.
In step ST2, the display section 6 displays "Please enter the outside line connection number". And step ST
Move to 3. In step ST3, it is determined whether or not an outside line connection number has been input. When an external line connection number, for example, “0” is input, the process proceeds to step ST4.
On the other hand, if not input, the process stands by in this step ST3 until input. In step ST4, the input external line connection number is registered, and the process ends.

Next, a process for transmitting image data from the facsimile apparatus of this embodiment to another apparatus will be described with reference to FIG.
This will be described with reference to the flowchart shown in FIG.

In step ST11, first, a dial signal is transmitted. Next, the process proceeds to step ST12. In step ST12, the leading character string of the dial number is extracted. Then, the process proceeds to step ST13. In step ST13, it is determined whether or not the leading character string of the extracted dial number matches the registered outside line connection number. If the numbers match, it is determined that the call is to an outside line, and the process proceeds to step ST14. On the other hand, if the numbers do not match, it is determined that the call is for an extension, and the process proceeds to step ST15.

In step ST14, Super
Transmission is performed in G3. On the other hand, in step ST15, transmission is normally performed using G3. S for an outside line with a wide frequency band
Since the upper G3 is normally transmitted by G3 for an extension to which a frequency band is divided and a plurality of lines are allocated, no communication error occurs in the extension.

[0015]

According to the present invention, at the time of extension transmission, communication control is performed by the first image communication method, for example, normal G3, and at the time of external call transmission, by the second image communication method, for example, SuperG3. The communication error is small because the method is selected by.

According to the second aspect of the present invention, since the extension is automatically determined by the calling dial, the operation becomes easy.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a facsimile apparatus in which the present invention is implemented.

FIG. 2 is a flowchart illustrating a process of registering an outside line connection number in the facsimile apparatus of the embodiment.

FIG. 3 is a flowchart illustrating a communication method selection process at the time of transmission in the facsimile apparatus of the embodiment.

[Explanation of symbols]

 1 MPU 2 ROM 3 RAM 4 Image memory 5 Operation panel 6 Display unit 7 Bus 8 NCU 9 Modem 10 Scanner 11 Printer 12 CODEC 13 LAN I / F 14 Internal line 15 LAN

Claims (2)

[Claims] 1. A line connection unit connected to an extension exchange, capable of making an extension call and an outside call, and at the time of an extension call and an outside call, a first image communication system is used when the extension is connected.
A communication terminal device comprising: a control unit that performs communication control by a second image communication method when an external line is connected. 2. The system according to claim 1, wherein the line connection unit has an automatic dial function, and the control unit selects the first image communication system and the second image communication system based on outside line identification dial information. The communication terminal device according to claim 1, wherein: