Voice data exchange system

• US 6,658,020 B1
• Filed: 03/02/1999
• Issued: 12/02/2003
• Est. Priority Date: 03/05/1998
• Status: Expired due to Term

• Current Assignee: OKI Electric Industry Company Limited
• Original Assignee: OKI Electric Industry Company Limited
• Inventors: Matsunuma, Keiji, Isaka, Masazumi, Sekine, Yoshinori
• Primary Examiner(s): Kizou, Hassan
• Assistant Examiner(s): Odland, David
• Application Number:
  US09/260,513
• Time in Patent Office: 1,736 Days
• Field of Search: 370/352, 370/355, 370/356, 370/357, 370/359, 370/360, 370/389, 370/392, 370/419, 370/420, 370/422, 370/425, 370/426, 370/466, 370/467, 370/474, 375/220, 379/93.01, 379/93.05, 379/93.14, 379/93.15, 379/93.18, 379/93.26, 379/224, 379/229
• US Class Current: 370/466
• CPC Class Codes: H04M 3/42314 in private branch exchanges
• CPC Class Codes: H04M 7/006 Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP) , including next generation networks with a packet-switched transport layer H04L65/00 takes precedence; aspects not specific to the type of network H04M3/00; special services in those networks H04M3/42

Abstract

A trunk carries out mutual exchange of voice data and MAC frames used in a public telephone circuit. A SLIC carries out mutual exchange of voice data and MAC frames used by PBX telephone devices. Internet protocol telephone devices conduct communications using MAC frames. A LAN switch houses a trunk, SLIC, and Internet protocol telephone devices, and switches ports in accordance with the destination address contained in a MAC frame. A main CPU executes communications protocols for call origination processing, call reception processing and disconnection processing, by communicating with the trunk, SLIC and Internet protocol telephone device.

Claims

1. A voice data exchange system comprising:

first connecting means for carrying conversion between a voice data format of a public telephone network and that of a MAC frame;

second connecting means for carrying out conversion between a voice data format of a private telephone network and that of a MAC frame;

data network telephone device for executing voice communication using MAC frames;

switching means provided with a port for accommodating said first connecting means, a port for accommodating said second connecting means and a port for accommodating said data network telephone device, for carrying out switching of the ports in accordance with destination addresses contained in the MAC frames received from said first connecting means, said second connecting means or said data network telephone device; and

main control means for executing a first call establishment protocol and a first call disconnection protocol toward said first connecting means on behalf of said second connecting means and said data network telephone device, executing a second call establishment protocol and a second call disconnection protocol toward said second connecting means on behalf of said first connecting means and said data network telephone device, and executing a third call establishment protocol and a third call disconnection protocol toward said data network telephone device on behalf of said first and second connecting means.

2. The voice data exchange system according to claim 1, wherein said first connecting means comprises interfacing means for transmitting and receiving voice data and control signals with said public telephone network;

codec means for encoding voice data which is input from said interfacing means and decoding voice data which is output to said interfacing means;

disassembling and assembling means for dissembling MAC frames received from said switching means and outputting voice data to said codec means, and assembling MAC frames containing voice data input from said codec means and transmitting said MAC frames to said switching means; and

internal control means for executing communications protocols for call origination processing, call reception processing and disconnection processing, by communicating with said main control means on the basis of said control signals received by said interfacing means.

3. The voice data exchange system according to claim 2, wherein said first connecting means comprises means for generating a ring back tone and means for generating a ringing tone.

4. The voice data exchange system according to claim 2, comprising media access control means for assembling and disassembling the MAC frame, located between said first connecting means and said switching means.

5. The voice data exchange system according to claim 4, wherein said first connecting means and said media access control means are connected by a local area network connection line.

6. The voice data exchange system according to claim 1, wherein said second connecting means comprises subscriber means for transmitting and receiving voice data and control data;

codec means for encoding voice data which is input from said subscriber means and decoding voice data which is output to said subscriber means;

disassembling and assembling means for disassembling MAC frames received from said switching means and outputting voice data to said codec means, and assembling MAC frames containing voice data input from said codec means and transmitting said frames to said switching means; and

internal control means for executing communications protocols for call origination processing, call reception processing and disconnection processing, by communicating with said main control means on the basis of said control signals received by said subscriber means.

7. The voice data exchange system according to claim 6, wherein said second connecting means comprises means for generating a ring back tone and means for generating a ringing tone.

8. The voice data exchange system according to claim 6, comprising media access control means for assembling and disassembling the MAC frame, located between said second connecting means and said switching means.

9. The voice data exchange system according to claim 8, wherein said second connecting means and said media access control means are connected by a local area network connection line.

10. The voice data exchange system according to claim 1, wherein said Private Telephone Network is a network using a Private Branch Exchange System.

11. The voice data exchange system according to claim 1, wherein said data network telephone device comprises a multi-function telephone device for transmitting and receiving voice data and control signals;

codec means for encoding voice data input from said multi-function telephone device and decoding voice data output to said multi-function telephone device;

disassembling and assembling means for disassembling MAC frames received from said switching means and outputting voice data to said codec means, and for assembling MAC frames containing voice data input from said codec means and transmitting said MAC frames to said switching means; and

internal control means for executing communications protocols for call originating processing, call reception processing and disconnection processing, by communicating with said main control means on the basis of said control signals input from said multi-function telephone device.

12. The voice data exchange system according to claim 11, wherein said data network telephone device comprises means for generating a ring back tone and means for generating a ringing tone.

13. A voice data exchange system according to claim 11, comprising media access control means for assembling and disassembling the MAC frame, located between said data network telephone device and said switching means.

14. The voice data exchange system according to claim 13, wherein said data network telephone device and said media access control means are connected by a local area network connection line.

15. The voice data exchange system according to claim 1, wherein said data network telephone device is an Internet telephone.

16. The voice data exchange system according to claim 1, wherein said data network telephone device is connected to a terminal device which handles data other than voice data.

17. The voice data exchange system according to claim 16, wherein said data network telephone device has a voice priority control circuit which gives priority to process the voice data of said data network telephone device over said data of said terminal device.

18. The voice data exchange system according to claim 16, wherein said data network telephone device and said terminal device are connected by a local area network connection line.

19. The voice data exchange system according to claim 1, wherein said switching means comprises a port for accommodating a terminal device which handles data other than voice data.

20. A voice data exchange system according to claim 19, comprising media access control means for assembling and disassembling the MAC frame, located between said switching means and said terminal device.

21. The voice data exchange system according to claim 20, wherein said terminal device and said media access control means are connected by a local area network connection line.

22. The voice data exchange system according to claim 1, wherein said public telephone network is a network using a circuit switching system.

23. A voice data exchange system comprising:

a trunk for carrying out mutual conversion between a voice data format of a public telephone network and that of a MAC frame;

a subscriber line interface circuit for carrying out mutual conversion between a voice data format of a private telephone network and that of a MAC frame;

a data network telephone device for executing voice communication using MAC frames;

a LAN switch provided with a port for accommodating said trunk, a port for accommodating said subscriber line interface circuit and a port for accommodating said data network telephone device and, for carrying out switching of the ports in accordance with destination addresses contained in the MAC frames received from said trunk, said subscriber line interface circuit or said data network telephone device; and

a main CPU for executing a first call establishment protocol and a first call disconnection protocol toward said first connecting means on behalf of said second connecting means and said data network telephone device, executing a second call establishment protocol and a second call disconnection protocol toward said second connecting means on behalf of said first connecting means and said data network telephone device, and executing a third call establishment protocol and a third call disconnection protocol toward said data network telephone device on behalf of said first and second connecting means.