Dual-protocol dual port telephone and method to connect another dual-protocol dual port telephone via IP network directly and without installation

• US 20070160034A1
• Filed: 01/06/2006
• Published: 07/12/2007
• Est. Priority Date: 01/06/2006
• Status: Abandoned Application

• Current Assignee: DSP Group Ltd. (Synaptics Incorporated)
• Original Assignee: DSP Group Ltd. (Synaptics Incorporated)
• Inventors: Koretsky, Victor
• Application Number:
  US11/326,463
• Publication Number:
  US 20070160034A1
• Time in Patent Office: Days
• US Class Current: 370/352
• CPC Class Codes: H04L 2101/65 Telephone numbers
• CPC Class Codes: H04L 61/103 across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]
• CPC Class Codes: H04L 61/106 across networks, e.g. mapping telephone numbers to data network addresses
• CPC Class Codes: H04L 61/2514 between local and global IP addresses
• CPC Class Codes: H04L 61/2567 for reachability, e.g. inquiring the address of a correspondent behind a NAT server
• CPC Class Codes: H04L 65/103 in the network
• CPC Class Codes: H04L 65/104 in the network
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1101 Session protocols

Abstract

A VoIP telephone call is seamlessly routed via an IP network between a dual mode, dual protocol source telephone and a dual mode, dual protocol target telephone both having two communication ports having respective first and second addresses for connecting to a non-IP network and an IP network, respectively. Upon dialing the first address of the target telephone, the first address of the source telephone is retrieved without requiring manual intervention and then used to retrieve the second address of the target telephone without requiring manual intervention. The call is then seamlessly directed over the IP network between the source telephone and the target telephone using their respective second addresses. The second address of the source telephone is retrieved by the target telephone in symmetrical manner.

Claims

1. A method of effecting seamless routing of a VoIP telephone call via an IP network between a source telephone and a target telephone both having two communication ports having respective first and second addresses for connecting to a non-IP network and an IP network, respectively, by dialing the first address of the target telephone, the method comprising:

(a) retrieving the first address of the source telephone without requiring manual intervention;

(b) using the first address of the target telephone input to the source telephone to retrieve the second address of the target telephone without requiring manual intervention; and

(c) seamlessly directing VoIP between the source telephone and the target telephone using their respective second addresses.

2. The method according to claim 1, wherein the second address of the source telephone is a unique public IP address, and retrieving the second address of the source telephone includes periodically accessing a public server for retrieving the unique public IP address of the source telephone.

3. The method according to claim 2, further including storing the unique public IP address of the source telephone in a memory of the source telephone so as to allow subsequent retrieval without accessing the public server.

4. The method according to claim 1, wherein the second address of the source telephone comprises a unique public IP address and a private IP address that is unique to a local area network that contains the source telephone but is publicly non-unique, and retrieving the second address of the source telephone includes:

i) periodically accessing a public server for retrieving the unique public IP address of the source telephone; and

ii) accessing a local repository to extract the private IP address of the source telephone.

5. The method according to claim 4, further including storing the unique public IP address of the source telephone in a memory of the source telephone so as to allow subsequent retrieval without accessing the public server.

6. The method according to claim 4, further including storing the private IP address of the source telephone in a memory of the source telephone so as to allow subsequent retrieval without accessing an external device.

7. The method according to claim 6, wherein accessing a local repository includes accessing a memory of the source telephone.

8. The method according to claim 4, wherein accessing a local repository includes accessing a DHPC server.

9. The method according to claim 4, further including:

i) accessing a list of phone book contacts to obtain respective second addresses of all phone book contacts having a telephone with two communication ports having respective first and second addresses for connecting to a non-IP network and an IP network; and

ii) notifying changes in the second address of the source telephone to said phone book contacts via IP communications between the second address of the source telephone and the respective second addresses of the phone book contacts.

10. The method according to claim 1, wherein using the first address of the target telephone to retrieve the second address of the target telephone includes:

i) effecting a non-IP call to the first address of the target telephone for receiving therefrom a message containing the second address of the target telephone; and

ii) storing the second address of the target telephone in a local repository that maps the second address of the target telephone to the first address of the target telephone so as to allow subsequent retrieval of the second address of the target telephone in response to its first address.

11. The method according to claim 10, including effecting a non-IP call via a PSTN and conveying said message using Central Office Call Waiting CallerID protocol.

12. The method according to claim 10, including effecting a non-IP call via a Cellular network and conveying said message using SMS.

13. The method according to claim 10, further including conveying in said message NAT traversal information.

14. The method according to claim 10, wherein storing the second address of the target telephone in the local repository includes storing the address in a memory of the source telephone.

15. The method according to claim 1, wherein using the first address of the target telephone input to the source telephone to retrieve the second address of the target telephone includes retrieving the second address of the target telephone from a local repository that maps the second address of the target telephone to the first address of the target telephone.

16. The method according to claim 15, wherein retrieving the second address of the target telephone from a local repository includes retrieving the second address of the target telephone from a memory of the source telephone.

17. A dual mode, dual protocol telephone, comprising:

a first communication port having a first address for connecting to a non-IP network,

a second communication port having a second address for connecting to an IP network,

a user interface for allowing entry or selection of the first address of a remote similar dual mode, dual protocol telephone with which VoIP communication is required between the respective second communication ports of both telephones, and

a processing unit adapted to retrieve the respective second addresses of both telephones and to seamlessly establish a VoIP communication therebetween.

18. The dual mode, dual protocol telephone according to claim 17, wherein:

a memory is coupled to the processing unit for storing first addresses of dual mode, dual protocol telephones to corresponding second addresses thereof, and the processing unit includes an address linking module coupled to the memory and being responsive to a first address for extracting the corresponding second address from the memory.

19. The dual mode, dual protocol telephone according to claim 18, wherein the processing unit includes:

a public and private IP discovery unit for obtaining a public IP address of the source telephone and a private IP address thereof if the source telephone is part of a LAN.

20. A dual mode, dual protocol source telephone according to claim 19, wherein the processing unit is adapted to:

access a public server periodically for retrieving or renewing the public IP address of the dual mode, dual protocol source telephone,

access a local repository to extract the private IP address of the dual mode, dual protocol source telephone,

access the memory to obtain respective second addresses of all phone book contacts having dual mode, dual protocol telephones, and

notify changes in the second address of the dual mode, dual protocol source telephone to said phone book contacts via IP communications between the second address of the source telephone and the respective second addresses of the phone book contacts.

21. The dual mode, dual protocol telephone according to claim 17, wherein the second addresses of the source and target telephones each include a private IP address, a public IP address and a port number of the router or NAT to which the telephone is connected.

22. A dual mode, PSTN/VoIP telephone according to claim 17, further including a Central Office Call Waiting Caller ID protocol emulator coupled to the processing unit for conveying the retrieved second address of the dual mode PSTN/VoIP telephone to a remote dual mode, PSTN/VoIP telephone.

23. A dual mode, Cellular/VoIP telephone according to claim 17, further including a SMS protocol emulator coupled to the processing unit for conveying the retrieved second address of the dual mode Cellular/VoIP telephone to a remote dual mode, Cellular/VoIP telephone.