Method and apparatus for network telephony

• US 7,110,395 B1
• Filed: 10/31/2000
• Issued: 09/19/2006
• Est. Priority Date: 10/31/2000
• Status: Expired due to Fees

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Blair, Dana Lynn
• Primary Examiner(s): Nguyen, Steven
• Assistant Examiner(s): HAN, CLEMENCE S
• Application Number:
  US09/703,296
• Time in Patent Office: 2,149 Days
• Field of Search: 370351-356
• US Class Current: 370/356
• CPC Class Codes: H04L 12/6418 Hybrid transport

Abstract

A method for converting a public switched telephone network call to a data network call. In one approach, the method includes receiving the public switched telephone network call from an origination phone at a destination phone and then identifying a caller identifier for the public switched telephone network call. The call is then rejected and a call placed to a network service provider. Once connected to the network, the network address for the origination phone is determined and the call is completed across the data network. Alternatively, a PSTN call is placed from an origination phone to a destination phone. The origination phone detects a rejected call from the destination phone and places a call to a network service provider. Once connected to the network, the network address for the destination phone is determined and the call is completed across the data network. A network phone capable of acting as either a destination phone or an origination phone is also discussed.

Claims

1. A method for converting a public switched telephone network call to a data network call, the method comprising:

receiving the public switched telephone network call from an origination phone at a destination phone;

identifying a caller identifier for the public switched telephone network call at the destination phone as the identifier of a call capable of connecting over a data network;

automatically rejecting the public switched transmission call prior to alerting a user at the destination phone by transmitting a rejection signal generated by the destination phone to the origination phone;

placing a call to a network service provider from the destination phone;

determining a network address for the origination phone; and

completing a network call with the origination phone.

2. The method of claim 1 wherein the destination phone is a personal computer.

3. The method of claim 1 wherein the destination phone is a customized telephone.

4. The method of claim 1 wherein the call to the network service provider is made via PSTN.

5. The method of claim 1 wherein the call to the network service provider is made via a local area network.

6. A method for converting a public switched telephone network call to a data network call, the method comprising:

placing a public switched telephone network call from an origination phone to a destination phone such that the call includes a call identifier identifying the origination phone as capable of connecting over a data network;

detecting a rejected call from the destination phone at the origination phone prior to alerting a user at the destination phone by detecting a rejection signal generated by the destination phone;

automatically placing a call to a network service provider from the origination phone in response to the rejection signal;

determining a network address for the destination phone; and

completing a network call with the destination phone.

7. The method of claim 6 wherein the origination phone is a personal computer.

8. The method of claim 6 wherein the origination phone is a customized telephone.

9. The method of claim 6 wherein the call to the network service provider is made via PSTN.

10. The method of claim 6 wherein the call to the network service provider is made via a local area network.

11. A network phone, comprising:

a phone connector operable to connect to a public switched telephone network;

a transmitter operable to transmit signals corresponding to a phone number for a call destination and a call identifier identifying the other station as capable of connecting over a data network;

a detector operable to receive an incoming call from another station and detect supplementary signals associated with that call including the call identifier identifying the other station as capable of connecting over a data network;

a processor operable to;

generate and transmit a rejection signal to the other station prior to alerting a user;

place a public switched telephone network call to a service provider in response to the supplementary signals;

detect a network address for the other station; and

complete a network call between the network phone and the other station.

12. The network phone of claim 11, wherein the network phone is a personal computer.

13. The network phone of claim 11, wherein the network phone is a customized telephone.

14. A computer-readable medium containing software code that, when executed, causes a destination phone to:

receiving a public switched telephone network call from an origination phone;

identifying a caller identifier for the public switched telephone network call at the destination phone as a call capable of being completed over a data network;

rejecting the public switched transmission call prior to call completion, by generation and transmission of a rejection signal to the origination phone prior to alerting a user;

placing a call to a network service provider after transmission of the rejection signal;

determining a network address for the origination phone; and

completing a network call with the origination phone.

15. The computer-readable medium of claim 14 wherein the software code is executed by a personal computer equipped to place public switched telephone network calls.

16. The computer-readable medium of claim 14 wherein the software code is executed by a customized telephone.

17. A computer-readable medium containing software code that, when executed, causes an origination phone to:

placing a public switched telephone network call to a destination phone;

detecting a rejected call from the destination phone transmitting prior to alerting a user by detecting a rejection signal generated by the destination phone;

automatically placing a call to a network service provider in response to the rejection signal;

determining a network address for the destination phone; and

completing a network call with the destination phone.

18. The computer-readable medium of claim 17 wherein the software code is executed by a personal computer equipped to place public switched telephone network calls.

19. The computer-readable medium of claim 17 wherein the software code is executed by a customized telephone.

20. A network phone, comprising:

a means for connecting to a public switched telephone network;

a means for transmitting signals corresponding to a phone number for a call destination and a call identifier identifying the call as being capable of being connected over a data network;

a means for receiving an incoming call from another station and detect supplementary signals associated with that call including the call identifier identifying the call as being capable of being connected over a data network;

a means for generating and transmitting a rejection signal to the other station prior to alerting a user;

a means for placing a public switched telephone network call to a service provider in response to the supplementary signals;

a means for detecting a network address for the other station; and

a means for completing a network call between the network phone and the other station.