Approach for tracking internet protocol telephony devices in networks

• US 7,103,034 B1
• Filed: 05/09/2002
• Issued: 09/05/2006
• Est. Priority Date: 05/09/2002
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Shankar, Jagannathan Shiva, Srinivas, Muktevi, Patakolusu, Damodar
• Primary Examiner(s): Phunkulh, Bob A.
• Application Number:
  US10/143,648
• Time in Patent Office: 1,580 Days
• Field of Search: None
• US Class Current: 370/352
• CPC Class Codes: H04M 7/0078 Security; Fraud detection; Fraud prevention

Abstract

An approach for tracking IP telephony devices in a network generally involves detecting changes in physical connections of IP telephony devices to the network by evaluating address data for the IP telephony devices. Address data for the telephony devices is evaluated over time to detect changes that have occurred in physical connections. Status data is generated and provided to a network manager application that notifies administrative personnel of the changes. Other embodiments include verifying that a physical connection has changed after an initial detection by waiting a specified amount of time and then evaluating additional address data to determine whether the change still exists.

Claims

1. A method for tracking an Internet Protocol (IP) telephony device connected to a network, the method comprising the steps of:

receiving first address data that specifies a physical connection of the IP telephony device to the network at a first point in time;

receiving second address data that specifies a physical connection of the IP telephony device to the network at a second point in time that is after the first point in time;

determining, based upon the first address data and the second address data, whether the physical connection of the IP telephony device to the network has changed overtime; and

if, based upon the determining step, the physical connection of the IP telephony device to the network has changed over time, then generating status data that indicates that the physical connection of the IP telephony device to the network has changed over time.

2. The method as recited in claim 1, wherein the first address data specifies a first switch address for the IP telephony device and the second address data specifies a second switch address for the IP telephony device.

3. The method as recited in claim 1, wherein the first address data specifies a first port for the IP telephony device and the second address data specifies a second port for the IP telephony device.

4. The method as recited in claim 1, wherein the first address data specifies a first switch address and a first port for the IP telephony device and the second address data specifies a second specifies address and a second port for the IP telephony device.

5. The method as recited in claim 1, wherein the first address data and second address data are received from a network switch to which the IP telephony device is physically connected.

6. The method as recited in claim 5, wherein the first address data and the second address data are automatically provided by the network switch.

7. The method as recited in claim 5, further comprising requesting the first address data and the second address data from the network switch.

8. The method as recited in claim 5, wherein the status data further specifies how the physical connection of the IP telephony device to the network has changed over time.

9. The method as recited in claim 1, wherein if the second address data indicates that the IP telephony device is no longer physically connected to the network, then including in the status data, data that indicates that the IP telephony device is no longer physically connected to the network.

10. The method as recited in claim 1, wherein:

the method further comprises receiving third address data that specifies a physical connection of the IP telephony device to the network at a point in time that is after the second point in time, and

the status data that indicates that the physical connection of the IP telephony device to the network has changed over time is generated only if both the second address data and the third address data indicate, relative to the first address data, that the physical connection of the IP telephony device to the network has changed over time.

11. A computer-readable medium for tracking an Internet Protocol (IP) telephony device connected to a network, the computer-readable medium carrying one or more sequences of instructions which, when executed by one or more processors, cause the one or more processors to perform the steps of:

receiving first address data that specifies a physical connection of the IP telephony device to the network at a first point in time;

receiving second address data that specifies a physical connection of the IP telephony device to the network at a second point in time that is after the first point in time;

determining, based upon the first address data and the second address data, whether the physical connection of the IP telephony device to the network has changed overtime; and

if, based upon the determining step, the physical connection of the IP telephony device to the network has changed over time, then generating status data that indicates that the physical connection of the IP telephony device to the network has changed over time.

12. The computer-readable medium as recited in claim 11, wherein the first address data specifies a first switch address for the IP telephony device and the second address data specifies a second switch address for the IP telephony device.

13. The computer-readable medium as recited in claim 11, wherein the first address data specifies a first port for the IP telephony device and the second address data specifies a second port for the IP telephony device.

14. The computer-readable medium as recited in claim 11, wherein the first address data specifies a first switch address and a first port for the IP telephony device and the second address data specifies a second specifies address and a second port for the IP telephony device.

15. The computer-readable medium as recited in claim 11, wherein the first address data and second address data are received from a network switch to which the IP telephony device is physically connected.

16. The computer-readable medium as recited in claim 15, wherein the first address data and the second address data are automatically provided by the network switch.

17. The computer-readable medium as recited in claim 15, further comprising one or more additional instructions which, when executed by the one or more processors, cause the one or more processors to perform the step of requesting the first address data and the second address data from the network switch.

18. The computer-readable medium as recited in claim 15, wherein the status data further specifies how the physical connection of the IP telephony device to the network has changed over time.

19. The computer-readable medium as recited in claim 11, wherein if the second address data indicates that the IP telephony device is no longer physically connected to the network, then including in the status data, data that indicates that the IP telephony device is no longer physically connected to the network.

20. The computer-readable medium as recited in claim 11, wherein:

the computer-readable medium further comprises one or more additional instructions which, when executed by the one or more processors, cause the one or more processors to perform the step of receiving third address data that specifies a physical connection of the IP telephony device to the network at a point in time that is after the second point in time, and

the status data that indicates that the physical connection of the IP telephony device to the network has changed over time is generated only if both the second address data and the third address data indicate, relative to the first address data, that the physical connection of the IP telephony device to the network has changed over time.

21. A computer system for tracking an Internet Protocol (IP) telephony device connected to a network, the computer system comprising a memory that includes one or more sequences of instructions which, when executed by one or more processors, cause the one or more processors to perform the steps of:

receiving first address data that specifies a physical connection of the IP telephony device to the network at a first point in time;

receiving second address data that specifies a physical connection of the IP telephony device to the network at a second point in time that is after the first point in time;

determining, based upon the first address data and the second address data, whether the physical connection of the IP telephony device to the network has changed over time; and

if, based upon the determining step, the physical connection of the IP telephony device to the network has changed over time, then generating status data that indicates that the physical connection of the IP telephony device to the network has changed over time.

22. The computer system as recited in claim 21, wherein the first address data specifies a first switch address for the IP telephony device and the second address data specifies a second switch address for the IP telephony device.

23. The computer system as recited in claim 21, wherein the first address data specifies a first port for the IP telephony device and the second address data specifies a second port for the IP telephony device.

24. The computer system as recited in claim 21, wherein the first address data specifies a first switch address and a first port for the IP telephony device and the second address data specifies a second specifies address and a second port for the IP telephony device.

25. The computer system as recited in claim 21, wherein the first address data and second address data are received from a network switch to which the IP telephony device is physically connected.

26. The computer system as recited in claim 25, wherein the first address data and the second address data are automatically provided by the network switch.

27. The computer system as recited in claim 25, wherein the memory further comprises one or more additional instructions which, when executed by the one or more processors, cause the one or more processors to perform the step of requesting the first address data and the second address data from the network switch.

28. The computer system as recited in claim 25, wherein the status data further specifies how the physical connection of the IP telephony device to the network has changed over time.

29. The computer system as recited in claim 21, wherein if the second address data indicates that the IP telephony device is no longer physically connected to the network, then including in the status data, data that indicates that the IP telephony device is no longer physically connected to the network.

30. The computer system as recited in claim 21, wherein:

the memory further comprises one or more additional instructions which, when executed by the one or more processors, cause the one or more processors to perform the step of receiving third address data that specifies a physical connection of the IP telephony device to the network at a point in time that is after the second point in time, and

the status data that indicates that the physical connection of the IP telephony device to the network has changed over time is generated only if both the second address data and the third address data indicate, relative to the first address data, that the physical connection of the IP telephony device to the network has changed over time.