Data redirection system and method using Internet protocol private branch exchange

Abstract

A multimedia redirection system and method using an IP PBX are provided. The PBX system allocates at least one channel for multimedia data transmission between a private IP terminal and a public IP terminal, maps between ports of the channels, and direction-transmits the multimedia data between the private IP terminal and the public IP terminal.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

A more complete appreciation of the present invention, and many of the attendant advantages thereof, will become readily apparent as the same becomes better understood by reference to the following detailed description when considered in conjunction with the accompanying drawings in which like reference symbols indicate the same or similar components, wherein:

FIG. 1 illustrates a system for redirecting voice/video data using an IP PBX according to an exemplary embodiment of the present invention;

FIG. 2 illustrates an example of media gateway interface (MGI) channel information according to an exemplary embodiment of the present invention; and

FIG. 3 is a flowchart illustrating a procedure for setting up a call from a video IP terminal of an IP PBX to a standard video session initiation protocol (SIP) terminal according to an exemplary embodiment of the present invention.

Claims

1. A private branch exchange (PBX) system, comprising a private branch exchange allocating at least one channel for multimedia data transmission between a private IP (Internet protocol) terminal and a public IP terminal, mapping between ports of the channels, and redirecting the multimedia data between the private IP terminal and the public IP terminal according to the mapped port.

2. The PBX system of claim 1, wherein the private branch exchange further comprises: a first channel allocation module for allocating a first Real-time Transport Protocol (RTP) port of a first media gateway interface (MGI) channel according to a call setup message received from the private IP terminal;a second channel allocation module for allocating a second Real-time Transport Protocol (RTP) port of a second media gateway interface (MGI) channel according to the call setup message having the first allocated Real-time Transport Protocol (RTP) port; anda redirection module for mapping between the first and second Real-time Transport Protocol (RTP) ports to redirect the multimedia data between the private IP terminal and the public IP terminal according to a call connect message received from the public IP terminal.

3. The PBX system of claim 2, wherein the call setup message received from the private IP terminal comprises at least one of information on an IP address, a voice port, and a video port of the private IP terminal.

4. The PBX system of claim 3, wherein information about the first allocated Real-time Transport Protocol (RTP) port comprises at least one of voice/video ports of the private IP terminal and voice/video ports of the first media gateway interface (MGI) channel, and information about the second allocated Real-time Transport Protocol (RTP) port comprises at least one of voice/video ports of the public IP terminal and voice/video ports of the second media gateway interface (MGI) channel.

5. The PBX system of claim 4, wherein the redirection module receives voice data from the voice port of the private IP terminal via the voice port of the first media gateway interface (MGI) channel and redirects the voice data to the voice port of the public IP terminal.

6. The PBX system of claim 4, wherein the redirection module receives video data from the video port of the private IP terminal via the video port of the first media gateway interface (MGI) channel and redirects the video data to the video port of the public IP terminal.

7. The PBX system of claim 4, wherein the redirection module receives voice data from the voice port of the public IP terminal via the voice port of the second media gateway interface (MGI) channel and redirects the voice data to the voice port of the private IP terminal.

8. The PBX system of claim 4, wherein the redirection module receives video data from the video port of the public IP terminal via the video port of the second media gateway interface (MGI) channel and redirects the video data to the video port of the private IP terminal.

9. A private branch exchange (PBX), comprising: a first channel allocation module for allocating a first Real-time Transport Protocol (RTP) port of a first media gateway interface (MGI) channel according to a call setup message received from a private IP (Internet protocol) terminal;a second channel allocation module for allocating a second Real-time Transport Protocol (RTP) port of a second media gateway interface (MGI) channel according to the call setup message having the first allocated Real-time Transport Protocol (RTP) port; anda redirection module for mapping between the first and second Real-time Transport Protocol (RTP) ports to redirect the multimedia data between the private IP terminal and a public IP terminal according to a call connect message received from the public IP terminal.

10. The PBX of claim 9, wherein the call setup message received from the private IP terminal comprises at least one of information on an IP address, a voice port, and a video port of the private IP terminal.

11. The PBX of claim 10, wherein information about the first allocated Real-time Transport Protocol (RTP) port comprises at least one of voice/video ports of the private IP terminal and voice/video ports of the first media gateway interface (MGI) channel, and information about the second allocated Real-time Transport Protocol (RTP) port comprises at least one of voice/video ports of the public IP terminal and voice/video ports of the second media gateway interface (MGI) channel.

12. The PBX of claim 11, wherein the redirection module receives voice data from the voice port of the private IP terminal via the voice port of the first media gateway interface (MGI) channel and redirects the voice data to the voice port of the public IP terminal.

13. The PBX of claim 11, wherein the redirection module receives video data from the video port of the private IP terminal via the video port of the first media gateway interface (MGI) channel and redirects the video data to the video port of the public IP terminal.

14. The PBX of claim 11, wherein the redirection module receives voice data from the voice port of the public IP terminal via the voice port of the second media gateway interface (MGI) channel and redirects the voice data to the voice port of the private IP terminal.

15. The PBX of claim 11, wherein the redirection module receives video data from the video port of the public IP terminal via the video port of the second media gateway interface (MGI) channel and redirects the video data to the video port of the private IP terminal.

16. A multimedia redirection method, comprising the steps of: allocating a first Real-time Transport Protocol (RTP) port of a first media gateway interface (MGI) channel according to a call setup message received from a private IP (Internet protocol) terminal to store first Real-time Transport Protocol (RTP) port information;allocating a second Real-time Transport Protocol (RTP) port of a second media gateway interface (MGI) channel according to the call setup message having the first allocated Real-time Transport Protocol (RTP) port to store second Real-time Transport Protocol (RTP) information; andmapping between the first and second Real-time Transport Protocol (RTP) ports to redirect the multimedia data between the private IP terminal and a public IP terminal according to a call connect message received from the public IP terminal.

17. The method of claim 16, wherein the call setup message received from the private IP terminal comprises at least one of information on an IP address, a voice port, and a video port of the private IP terminal.

18. The method of claim 17, wherein information about the first allocated Real-time Transport Protocol (RTP) port comprises at least one of voice/video ports of the private IP terminal and voice/video ports of the first media gateway interface (MGI) channel, and information about the second allocated Real-time Transport Protocol (RTP) port comprises at least one of voice/video ports of the public IP terminal and voice/video ports of the second media gateway interface (MGI) channel.

19. The method of claim 18, wherein the redirecting step comprises the step of receiving voice data from the voice port of the private IP terminal via the voice port of the first media gateway interface (MGI) channel and redirecting the voice data to the voice port of the public IP terminal.

20. The method of claim 18, wherein the redirecting step comprises the step of receiving video data from the video port of the private IP terminal via the video port of the first media gateway interface (MGI) channel and redirecting the video data to the video port of the public IP terminal.

21. The method of claim 18, wherein the redirecting step comprises the step of receiving voice data from the voice port of the public IP terminal via the voice port of the second media gateway interface (MGI) channel and redirecting the voice data to the voice port of the private IP terminal.

22. The method of claim 18, wherein the redirecting step comprises the step of receiving video data from the video port of the public IP terminal via the video port of the second media gateway interface (MGI) channel and redirecting the video data to the video port of the private IP terminal.