Integration of stimulus signalling protocol communication systems and message protocol communication systems

• US 6,470,020 B1
• Filed: 11/03/1998
• Issued: 10/22/2002
• Est. Priority Date: 11/03/1998
• Status: Expired due to Term

• Current Assignee: RPX Clearinghouse LLC (RPX Corporation)
• Original Assignee: Nortel Networks Limited (Nortel Networks Corporation)
• Inventors: Tubb, David John, Barker, Iain William, Jarvis, Peter Karel
• Primary Examiner(s): Nguyen, Chau
• Assistant Examiner(s): Lee, Andy
• Application Number:
  US09/185,361
• Time in Patent Office: 1,449 Days
• Field of Search: 370/260-261, 370/352, 370/385, 370/410, 370/401, 370/431, 370/433, 370/437-439, 370/522, 370/524, 709/204, 709/227, 709/230, 379/93.01, 379/202.01, 379/205.01, 379/207.02, 379/229
• US Class Current: 370/401
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04M 2207/203 composed of PSTN and data network, e.g. the Internet
• CPC Class Codes: H04M 7/0036 where the data service is an information service
• CPC Class Codes: H04M 7/125 Details of gateway equipment
• CPC Class Codes: H04M 7/126 Interworking of session control protocols
• CPC Class Codes: H04Q 2213/13093 Personal computer, PC
• CPC Class Codes: H04Q 2213/13096 Digital apparatus individually associated with a subscriber line, digital line circuits
• CPC Class Codes: H04Q 2213/13098 Mobile subscriber
• CPC Class Codes: H04Q 2213/13176 Common channel signaling, CCS7
• CPC Class Codes: H04Q 2213/13196 Connection circuit/link/trunk/junction, bridge, router, gateway
• CPC Class Codes: H04Q 2213/13204 Protocols
• CPC Class Codes: H04Q 2213/13222 PBX circuits in public exchange, centrex
• CPC Class Codes: H04Q 2213/1327 Release and resetting of connection
• CPC Class Codes: H04Q 2213/13298 Local loop systems, access network
• CPC Class Codes: H04Q 2213/13334 Key telephone systems
• CPC Class Codes: H04Q 2213/13375 Electronic mail
• CPC Class Codes: H04Q 2213/13377 Recorded announcement
• CPC Class Codes: H04Q 2213/13389 LAN, internet
• CPC Class Codes: H04Q 3/0025 Provisions for signalling

Abstract

Stimulus signalling protocols and message protocols are methods for transferring information over a communications network. Stimulus signalling protocols (e.g. P-Phone) are typically used for connecting simple terminals to a more powerful host whereas message protocols (e.g. H.323 standard) are typically used to connect between such hosts. Equipment has typically been developed and manufactured for use with either but not both systems and this has led to the need for protocol conversion devices which are complex and time consuming to develop and maintain. Voice data is sent via an H.323 channel over a data network and associated P-Phone signalling data is sent via a T.120 channel as part of the H.323 call. This enables stimulus signalling protocol equipment (e.g. business telephony handsets) to be used in message protocol systems without the need for protocol conversion.

Claims

1. A method of sending information between a message protocol compatible terminal in a message protocol communications network and a gateway to a stimulus signalling protocol communications network, comprising the steps of:

(i) establishing a first deactivated, two-way, communications channel between said terminal and said gateway;

(ii) opening a second two-way communications channel between said gateway and said terminal, said second two-way communications channel being associated with said first deactivated, two-way communications channel;

(iii) sending stimulus signalling protocol information over said second two-way communications channel;

(iv) detecting when information is about to be sent via said first, deactivated, two-way communications channel, on the basis of said stimulus signalling protocol information sent over the second, two-way communications channel and, if information is about to be sent via said first, deactivated, two-way communications channel, activating said first two-way communications channel; and

(v) sending information over said first, activated two-way communications channel.

2. A method as claimed in claim 1 wherein said information sent over said first, activated two-way communications channel is voice information.

3. A method as claimed in claim 1 wherein said terminal is a personal computer comprising an emulated business handset.

4. A method as claimed in claim 1 wherein said first two-way communications channel is an audio channel.

5. A method as claimed in claim 1 wherein said first two-way communications channel is an H.323 channel.

6. A method as claimed in claim 1 wherein said second two-way communications channel is a data channel.

7. A method as claimed in claim 4 wherein said second two-way communications channel is a T.120 channel.

8. A method as claimed in claim 1 which further comprises the step of deactivating said first two-way communications channel if information is not being sent over said first two-way communications channel.

9. A method as claimed in claim 1 which further comprises the step of providing information about a stimulus signalling protocol of said stimulus signalling protocol communications network to said terminal.

10. A method as claimed in claim 1 wherein said step (i) of establishing a first, deactivated, two-way communications channel between the terminal and the gateway comprises providing a signal to said gateway to indicate that a channel is requested and providing an authentication of said request by the gateway.

11. A gateway adapted to provide an interface between a message protocol communications network and a stimulus signalling protocol communications network, comprising:

(i) a processor arranged to establish a first, deactivated, two-way communications channel between the gateway and a message protocol compatible terminal in the message protocol communications network;

(ii) a second processor arranged to open a second two-way communications channel between the gateway and the terminal, said second two-way communications channel being associated with said first, deactivated, two-way communications channel;

(iii) a transmitter arranged to send stimulus signalling protocol information over said second two-way communications channel;

(iv) a detector arranged to detect when information is about to be sent via said first, deactivated, two-way communications channel, on the basis of said stimulus signalling protocol information sent over said second two-way communications channel;

(v) an activator arranged to activate said first two-way communications channel if information is about to be sent via said first, deactivated, two-way communications channel; and

(vi) a second transmitter arranged to send information over said first, activated two-way communications channel.

12. A gateway as claimed in claim 11 wherein said first two-way communications channel is an audio channel.

13. A gateway as claimed in claim 11 wherein said second two-way communications channel is a data channel.

14. A gateway as claimed in claim 13 wherein said second two-way communications channel is a T.120 channel.

15. A communications network comprising a message protocol communications network connected via a gateway to a stimulus signalling protocol communications network, said gateway comprising:

(i) a processor arranged to establish a first, deactivated, two-way communications channel between a message protocol compatible terminal in said message protocol communications network and said gateway;

(ii) a second processor arranged to open a second two-way communications channel between the gateway and the terminal, said second two-way communications channel being associated with said first, deactivated, two-way communications channel;

(iii) a transmitter arranged to send stimulus signalling protocol information over said second, two-way communications channel;

(iv) a detector arranged to detect when information is about to be sent via said first, deactivated, two-way communications channel, on the basis of information sent over the second two-way communications channel;

(v) an activator arranged to activate said first two-way communications channel if information is about to be sent via said first, deactivated, two-way communications channel; and

(vi) a second transmitter arranged to send information over said first, activated two-way communications channel.

16. A communications network as claimed in claim 15 wherein said first two-way communications channel is an audio channel.

17. A communications network as claimed in claim 15 wherein said first two-way communications channel is an H.323 channel.

18. A communications network as claimed in claim 15 wherein said second two-way communications channel is a data channel.

19. A communications network as claimed in claim 18 wherein said second two-way communications channel is a T.120 channel.

20. A program stored on a computer readable medium said program being intended for use on a gateway between a message protocol communications network and a stimulus signalling protocol communications network, such that said program causes said gateway to carry out the method steps of:

(i) establishing a first deactivated, two-way communications channel between a message protocol compatible terminal in said message protocol communications network and said gateway;

(ii) opening a second two-way communications channel between the gateway and the terminal, said second two-way communications channel being associated with said first, deactivated, two-way communications channel;

(iii) sending stimulus signalling protocol information over said second two-way communications channel;

(iv) detecting when information is about to be sent via said first, deactivated, two-way communications channel, on the basis of information sent over the second two-way communications channel;

(v) activating said first two-way communications channel if information is about to be sent via said first, deactivated, two-way communications channel; and

(vi) sending information over said first, activated, two-way communications channel.

21. A program as claimed in claim 20 which further provides the ability to interpret stimulus signalling protocol information received by said terminal.

22. A program as claimed in claim 20 which further provides a user interface via said terminal.