Remote activation of call trace

• US 6,320,955 B1
• Filed: 03/01/1999
• Issued: 11/20/2001
• Est. Priority Date: 03/01/1999
• Status: Expired due to Term

• Current Assignee: WSOU Investments, LLC (WSOU Holdings, LLC)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Bushnell, William Jackson
• Primary Examiner(s): Hong, Harry S.
• Application Number:
  US09/259,236
• Time in Patent Office: 995 Days
• Field of Search: 379/112, 379/113, 379/115, 379/116, 379/119, 379/120, 379/121, 379/122, 379/126, 379/127, 379/133, 379/134, 379/135, 379/142, 379/219, 379/242, 379/245, 379/246, 379/247, 379/249, 379/209, 379/265, 379/266, 379/309, 379/112.01, 379/115.01, 379/121.01, 379/221.08, 379/221.09, 379/221.1, 379/265.01, 379/32.05
• US Class Current: 379/246
• CPC Class Codes: H04M 1/56 Arrangements for indicating or recording the called number at the calling subscriber's set
• CPC Class Codes: H04M 1/57 Arrangements for indicating or recording the number of the calling subscriber at the called subscriber's set at the operator set in a manual exchange H04M5/20
• CPC Class Codes: H04M 3/2281 Call monitoring, e.g. for law enforcement purposes; Call tracing; Detection or prevention of malicious calls

Abstract

A method for identifying a route of a call in a telecommunication system (10) comprises the steps of routing the call from a telephonic calling device (12) via a telephonic switch (14) to a telephonic terminating device (56) and disconnecting the telephonic call. After the telephonic call is disconnected, a call trace is established to identify a called line number of a terminating line in response to a call trace request from the telephonic calling device (12) after the telephonic call is disconnected.

Claims

1. A method for identifying a route of a telephonic call in a telecommunication system having at least one telephonic switch, a telephonic calling device and a telephonic terminating device, comprising the steps of:

routing the telephonic call from the telephonic calling device via the telephonic switch to the telephonic terminating device;

disconnecting the telephonic call; and

establishing a call trace after the telephonic call is disconnected to identify a called line number of a terminating line in response to a call trace request from the telephonic calling device after the telephonic call is disconnected.

2. The method of claim 1 in which routing the telephonic call from the telephonic calling device via the telephonic switch to the telephonic terminating device includes the step of routing the telephonic call from the telephonic switch via another telephonic switch to the telephonic terminating device.

3. The method of claim 2 including the steps of recording an originating call record at an originating call record database of the telephonic switch,

maintaining the originating call record at the originating call record database of the telephonic switch for a predetermined set time,

recording data associated with a plurality of originating call records for a plurality of telephonic calls at the originating call record database of the telephonic switch, and

storing the plurality of originating call records in chronological order.

4. The method of claim 3 including the steps of determining that the telephonic terminating device has an associated 800 prefix telephone number,

transmitting a translation query from the telephonic switch to a signaling transfer point device,

transmitting the translation query from the signaling transfer point device to a signal control point device,

determining a ten digit code for the 800 prefix telephone number, and

recording the ten digit code in the originating call record.

5. The method of claim 3 in which the originating call record includes at least one of:

(a) a calling number of the telephonic calling device,

(b) a called number of the telephonic terminating device,

(c) a date of the telephonic call, and

(d) a time of the telephonic call.

6. The method of claim 3 including the steps of transmitting a calling number of the telephonic calling device and a called number of the telephonic terminating device from the processor of the telephonic switch to a signaling interface associated with the telephonic switch,

transmitting a data packet message carrying the calling number of the telephonic calling device and the called number of the telephonic terminating device from the signaling interface associated with the telephonic switch to a signal transfer point device,

determining at the signal transfer point device that the other telephonic switch that services the telephonic terminating device is able to receive the data packet message,

transmitting the calling number of the telephonic calling device and the called number of the telephonic terminating device from the signal transfer point device to another signaling interface associated with the other telephonic switch,

transmitting the calling number of the telephonic calling device and the called number of the telephonic terminating device from the other signaling interface associated with the other telephonic switch to another processor of the other telephonic switch, and

transmitting the calling number of the telephonic calling device and the called number of the telephonic terminating device from the other processor of the other telephonic switch to another terminating call record database of the other telephonic switch.

7. The method of claim 2 including the step of utilizing a call distribution algorithm to distribute the telephonic call to the telephonic terminating device, serviced by the other telephonic switch.

8. The method of claim 7 including the step of determining if a terminating line in a plurality of terminating lines is available to terminate the telephonic call to the telephonic terminating device.

9. The method of claim 2 including the step of recording a terminating call record at a terminating call record database,

maintaining the terminating call record at the terminating call record database for a predetermined set time,

recording data associated with a plurality of terminating call records for a plurality of telephonic calls at the terminating call record database, and

storing the plurality of terminating call records in chronological order.

10. The method of claim 9 in which the terminating call record includes at least one of:

(a) a calling number of the telephonic calling device,

(b) a called number of the telephonic terminating device,

(c) a date of the telephonic call

(d) a time of the telephonic call, and

(e) a called line number of the terminating line that serviced the telephonic terminating device.

11. The method of claim 1 in which the step of establishing the call trace includes the steps of establishing a dial-tone at the telephonic calling device, and

transmitting the call trace request from the telephonic calling device to the telephonic switch in response to receipt of a call trace activation code signal from the telephonic calling device.

12. The method of claim 11 including the steps of retrieving at a processor of the telephonic switch an originating call record for the telephonic call from an originating call record database of the telephonic switch,

determining from the originating call record a calling number of the telephonic calling device and a called number of the telephonic terminating device, and

transmitting a remote activation of call trace message carrying the call trace request and the originating call record from the processor of the telephonic switch that originated the telephonic call to a signaling interface associated with the telephonic switch.

13. The method of claim 12 including the steps of transmitting a data packet message carrying the remote activation of call trace message from the signaling interface associated with the telephonic switch to a signal transfer point device,

transmitting the data packet message from the signal transfer point device to another signaling interface associated with another telephonic switch, and

transmitting the remote activation of call trace message from the other signaling interface associated with the other telephonic switch to another processor of the other telephonic switch.

14. The method of claim 13 including the steps of retrieving at the other processor of the other telephonic switch the terminating call record of the telephonic call from the terminating call record database of the other telephonic switch, and

generating a call trace record at the other processor of the other telephonic switch.

15. The method of claim 14 in which the call trace record includes at least one of:

(a) the calling number of the telephonic calling device,

(b) the called number of the telephonic terminating device,

(c) a date of the telephonic call,

(d) a time of the telephonic call, and

(e) a called line number of the terminating line that serviced the telephonic terminating device.

16. The method of claim 14 including the step of transmitting the call trace record from the other processor of the other telephonic switch to a call trace record database.

17. The method of claim 1 in which the step of establishing the call trace includes the steps of establishing a dial-tone at the telephonic calling device,

transmitting the call trace request from the telephonic calling device to the telephonic switch in response to receipt of a call trace activation code signal from the telephonic calling device,

retrieving at a processor of the telephonic switch an originating call record for the telephonic call from an originating call record database of the telephonic switch,

retrieving at a processor of the telephonic switch a terminating call record for the telephonic call from a terminating call record database of the telephonic switch,

generating a call trace record at the processor of the telephonic switch, and

transmitting the call trace record from the processor of the telephonic switch to a call trace record database.

18. The method of claim 1 including the step of determining that another telephonic switch services a called number of the telephonic terminating device.

19. A telecommunication system for identifying a route of a telephonic call having at least one telephonic switch, a telephonic calling device and a telephonic terminating device, comprising:

at least one telephonic switch for routing the telephonic call from the telephonic calling device to the telephonic terminating device;

means for disconnecting the telephonic call; and

means for establishing a call trace after the telephonic call is disconnected to identify a called line number of a terminating line in response to a call trace request from the telephonic calling device after the telephonic call is disconnected.

20. The telecommunication system of claim 19 including means for sending the telephonic call to another telephonic switch that services the telephonic terminating device if the telephonic switch does not service a called number of the telephonic terminating device.

21. The telecommunication system of claim 20 including means for transmitting an SS7 message carrying a remote activation of call trace message that carries the call trace request and an originating call record from a signaling interface associated with the telephonic switch to a signal transfer point device, and

means for transmitting the SS7 message carrying the remote activation of call trace message that carries the call trace request and the originating call record from the signal transfer point device to another signaling interface associated with the other telephonic switch.

22. The telecommunication system of claim 20 in which the telephonic switch that originated the telephonic call includes an originating call record database for recording an originating call record, maintaining the originating call record for a predetermined set time, recording data associated with a plurality of originating call records for a plurality of telephonic calls and storing the plurality of originating call records in chronological order.

23. The telecommunication system of claim 22 in which the originating call record includes at least one of:

(a) a calling number of the telephonic calling device,

(b) the called number of the telephonic terminating device,

(c) a date of the telephonic call, and

(d) a time of the telephonic call.

24. The telecommunication system of claim 20 including a terminating call record database for recording a terminating call record, maintaining the terminating call record for a predetermined set time, recording data associated with a plurality of terminating call records for a plurality of telephonic calls and storing the plurality of terminating call records in chronological order.

25. The telecommunication system of claim 24 in which the terminating call record includes at least one of:

(a) a calling number of the telephonic calling device,

(b) the called number of the telephonic terminating device,

(c) a date of the telephonic call,

(d) a time of the telephonic call, and

(e) a called line number of the terminating line that serviced the telephonic terminating device.

26. The telecommunication system of claim 20 including means for generating a call trace record.

27. The telecommunication system of claim 26 in which the call trace record includes at least one of:

(a) a calling number of the telephonic calling device,

(b) the called number of the telephonic terminating device,

(c) a date of the telephonic call,

(d) a time of the telephonic call, and

(e) a called line number of the terminating line that serviced the telephonic terminating device.

28. The telecommunication system of claim 26 including a call trace record database for receiving the call trace record from a processor.