Communication Terminal Device, Communication Method, and Communication System

Abstract

A recipient communication terminal device, that can communicate in a V.34 communication mode, communicates with a transmitter communication terminal device, that cannot communicate in the V.34 communication mode. The transmitter device detects whether or not the recipient device includes V.8 communication mode capability in accordance with a received digital identification signal (DIS). When the transmitter device detects that the recipient device includes V.8 communication mode capability, the transmitter device generates a silent state for a prescribed period of time as a response to the received DIS, or stands by without responding to the received DIS until a second DIS is received.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram illustrating a configuration of a facsimile machine according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a procedure by which the facsimile machine transmits image data according to an embodiment of the present invention.

FIG. 3 is a flowchart illustrating a procedure by which the facsimile machine transmits image data according to an embodiment of the present invention.

Claims

1. A communication terminal device comprising: means for detecting a presence or an absence of a capability of an ITU recommendation V.8 communication mode in accordance with a received digital identification signal; andmeans for generating a silent state for a prescribed period of time as a response to the received digital identification signal when the means for detecting detects the presence of the capability of the V.8 communication mode.

2. The communication terminal device according to claim 1, further comprising means for setting a silent time lasting for the prescribed period until responding to the received digital identification signal.

3. The communication terminal device according to claim 1, further comprising means for standing by until receiving a next digital identification signal without responding to the digital identification signal received for a first time.

4. The communication terminal device according to claim 1, further comprising means for preventing communication in an ITU recommendation V.34 communication mode from being executed.

5. The communication terminal device according to claim 1, wherein facsimile communication is carried out via an Internet protocol network.

6. The communication terminal device according to claim 1, wherein the prescribed period of time is at least 400 ms.

7. The communication terminal device according to claim 1, wherein the means for detecting detects the presence or absence of the ITU recommendation V.8 communication mode capability by checking a No. 6 BIT of the received digital identification signal.

8. A communication system comprising: a recipient communication terminal device that can execute communication in an ITU V.34 communication mode, anda transmitter communication terminal device that cannot execute communication in the ITU V.34 communication mode,wherein the transmitter communication terminal device comprises: means for detecting a presence or an absence of a capability of an ITU recommendation V.8 communication mode in accordance with a received digital identification signal; andmeans for controlling to generate a silent state for a prescribed period of time as a response to the received digital identification signal when the means for detecting detects the presence of the capability of the V.8 communication mode in the recipient communication terminal device.

9. The communication system according to claim 8, wherein the transmitter communication terminal device further comprises means for standing by until receiving a next digital identification signal without responding to the digital identification signal received for a first time.

10. The communication system according to claim 8, wherein facsimile communication via an Internet protocol network is carried out between the transmitter communication terminal device and the recipient communication terminal device.

11. A facsimile communication method comprising: making a call to a recipient communication terminal device from a transmitter communication terminal device;transmitting a digital identification signal by the recipient communication terminal device;responding to the recipient communication terminal device by the transmitter communication terminal device after a prescribed period of silent time; andtransmitting image data to the recipient communication terminal device from the transmitter communication terminal device.

12. The facsimile communication method according to claim 11, further comprising: setting the transmitter communication terminal device to not execute a communication of V.34.

13. The facsimile communication method according to claim 11, further comprising: ignoring a digital identification signal received for a first time from the recipient communication terminal device at the transmitter communication terminal device; andresponding to a digital identification signal received for a second time from the recipient communication terminal device at the transmitter communication terminal device.

14. A facsimile communication method comprising: receiving a first digital identification signal;determining a presence or absence of ITU recommendation V.8 communication mode capability in accordance with the first digital identification signal; andwhen the ITU V.8 communication mode capability is present, executing either a first mode or a second mode of operation,wherein the first mode of operation comprises generating a silent state for a prescribed period of time, andwherein the second mode of operation comprises standing by until a second digital identification signal is received.

15. A method according to claim 14, wherein the presence or absence of the ITU recommendation V.8 communication mode capability is determined by checking a No. 6 BIT of the received digital identification signal.

16. A method according to claim 14, wherein the prescribed period of time is at least 400 ms.

17. A facsimile communication terminal device incapable of communicating in V.34 communication mode, comprising: a control unit that detects a presence or absence of V.8 communication mode capability in accordance with a received digital identification signal, and that executes either a first mode or a second mode of operation when V.8 communication mode capability is detected,wherein the first mode of operation comprises generating a silent state for a prescribed period of time, andwherein the second mode of operation comprises standing by until a second digital identification signal is received.

18. A facsimile communication terminal as claimed in claim 17, wherein: the controller detects the presence or absence of the V.8 communication mode capability by checking a No. 6 BIT of the received digital identification signal; andthe prescribed period of time is at least 400 ms.

19. A facsimile communication terminal as claimed in claim 17, wherein the terminal is incapable of communicating in a V.34 communication mode because it does not include a function of the V.34 communication mode.

20. A facsimile communication terminal as claimed in claim 17, wherein the terminal includes a function of a V.34 communication mode but is incapable of communicating in the V.34 communication mode due to a setting of the terminal.