Method for transferring dial tone in real time in computer communication system

• US 6,411,688 B1
• Filed: 10/14/1998
• Issued: 06/25/2002
• Est. Priority Date: 10/14/1997
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, In-Ho
• Primary Examiner(s): Chan, Wing F.
• Application Number:
  US09/172,192
• Time in Patent Office: 1,350 Days
• Field of Search: 379/93-6-, 379/93.01, 379/354, 379/355-1-3, 379/357.04
• US Class Current: 379/93.26
• CPC Class Codes: H04M 1/2473 Telephone terminals interfacing a personal computer, e.g. using an API (Application Programming Interface) details of API H04M7/0021
• CPC Class Codes: H04M 1/26 Devices for calling a subscriber H04M1/66 takes precedence
• CPC Class Codes: H04M 1/505 signals generated in digital form
• CPC Class Codes: H04M 1/6033 for providing handsfree use or a loudspeaker mode in telephone sets arrangements for preventing acoustic echo H04M9/08
• CPC Class Codes: H04M 11/06 Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors

Abstract

A method for transferring dual tone multifrequency (DTMF) signals in real time in a computer communications system for performing a telephone call via a modem. In the method, virtual connection with the modem is performed before a user inputs a connection number, wherein the modem is regarded as the external device to be connected. Then, when the virtual connection is achieved, a dual tone multifrequency (DTMF) signal corresponding to a number is transferred in real time through the modem whenever the user inputs the connection numbers one by one.

Claims

1. A method of communicating using a computer communications apparatus, comprising the steps of:

establishing a connection between a computer communications apparatus and a modem before a user inputs a number to said apparatus, said modem being disposed between said apparatus and a destination device, said apparatus being utilized to communicate with said destination device, said number being among a plurality of numbers corresponding to a telephone number of said destination device; and

transferring a control signal from said apparatus through said modem when said connection is established, said step of transferring being performed in response to the user inputting a selected number from among said plurality of numbers, wherein said control signal corresponds to said selected number.

2. The method of claim 1, wherein said control signal corresponds to a dual tone multifrequency signal.

3. The method of claim 2, wherein said dual tone multifrequency signal is transferred in real time in response to the user inputting said selected number.

4. The method of claim 1, wherein said modem corresponds to said destination device only during said step of establishing said connection.

5. The method of claim 1, wherein said plurality of numbers corresponds to 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, *, and #.

6. The method of claim 1, wherein said apparatus further comprises a mouse input unit and a display unit displaying said plurality of numbers, the user inputting said selected number to said apparatus utilizing said mouse input unit.

7. The method of claim 1, wherein said apparatus further comprises a keyboard including keys corresponding to said plurality of numbers, and the user inputs said selected number to said apparatus utilizing said keyboard.

8. The method of claim 1, further comprising:

a modem cable coupling said apparatus and said modem; and

a telephone cable coupling said modem with a central office.

9. The method of claim 8, wherein said step of establishing said connection further comprises the sub-steps of:

accessing said telephone cable to begin a communication session;

establishing said connection before said selected number is input, by providing a predetermined signal;

determining when said connection is established; and

terminating said communication session when said connection is not established.

10. The method of claim 1, wherein said step of transferring said control signal from said apparatus through said modem further comprises the sub-steps of:

determining when the user inputs said selected number; and

generating said control signal immediately in response to said selected number being input, and returning to said step of determining while said connection remains established.

11. A method of communicating using a computer communications apparatus, comprising the step of:

establishing a connection between a computer communications apparatus and a modem before a user inputs a selected number to said apparatus, said modem being disposed between said apparatus and a destination device, said modem being coupled to a telephone cable disposed between said modem and said destination device, said apparatus being utilized to communicate with said destination device, said selected number being among a plurality of numbers corresponding to a telephone number of said destination device, wherein said step of establishing said connection further comprises the sub-steps of;

accessing said telephone cable;

establishing said connection by providing a predetermined signal;

determining when the user inputs said selected number; and

generating a control signal corresponding to said selected number when said selected number is input, and then returning to said step of determining while said connection remains established.

12. The method of claim 11, further comprising the step of transferring said control signal from said apparatus through said modem.

13. The method of claim 11, wherein said control signal corresponds to a dual tone multifrequency signal.

14. The method of claim 13, wherein said dual tone multifrequency signal is transferred in real time in response to the user inputting said selected number.

15. The method of claim 12, wherein said modem corresponds to said destination device only during said step of establishing said connection.

16. A method of communicating using a computer communications apparatus, comprising the steps of:

establishing a connection between a computer communications apparatus and a modem before a user inputs a telephone number, said modem being disposed between said apparatus and a destination device, said apparatus being utilized to communicate with said destination device, said telephone number including a plurality of numbers and corresponding to said destination device, said modem being coupled to a telephone cable disposed between said modem and said destination device; and

transferring in real time a dual tone multifrequency signal from said apparatus through said modem when said connection is established, said step of transferring being performed in response to the user inputting a selected number from among said plurality of numbers, wherein said dual tone multifrequency signal corresponds to said selected number.

17. The method of claim 16, wherein said apparatus further comprises a display unit displaying said plurality of numbers, said display unit being selected from among a cathode ray tube, a liquid crystal display, a gas-plasma display, a light emitting diode display, an electro-luminescent display, and a field emission display.

18. The method of claim 16, wherein said apparatus further comprises a storage unit storing said telephone number, said storage unit being selected from among a floppy disk drive, a compact disc drive, a digital versatile disc drive, and a hard disk drive, said user inputting said selected number by utilizing said storage unit storing said telephone number.

19. The method of claim 16, wherein said step of establishing said connection further comprises the sub-steps of:

accessing said telephone cable to begin a communication session;

establishing said connection before said selected number is input, by providing a predetermined signal;

determining when said connection is established; and

terminating said communication session when said connection is not established.

20. The method of claim 19, wherein said step of transferring said dual tone multifrequency signal from said apparatus through said modem further comprises the sub-steps of:

determining when the user inputs said selected number; and

generating said dual tone multifrequency signal immediately in response to said selected number being input, and returning to said step of determining while said connection remains established.