Computer-based method and apparatus for controlling, monitoring, recording and reporting telephone access

• US 6,611,583 B1
• Filed: 12/29/1998
• Issued: 08/26/2003
• Est. Priority Date: 04/19/1994
• Status: Expired due to Fees

• Current Assignee: Securus Technologies Incorporated (Securus Special Investments LLC)
• Original Assignee: T-Netix, Inc. (Cognizant Technology Solutions Corp.)
• Inventors: Gainsboro, Jay L.
• Primary Examiner(s): Tsang; Fan
• Assistant Examiner(s): Foster; Roland G.
• Application Number:
  US09/222,130
• Time in Patent Office: 1,701 Days
• Field of Search: 379/34,35,114,188,189,190,194,195,196-200,386,88.22,207.01,207.02,207.11
• US Class Current: 379/188
• CPC Class Codes: H04M 19/02 providing ringing current or supervisory tones, e.g. dialling tone or busy tone
• CPC Class Codes: H04M 2201/40 using speech recognition
• CPC Class Codes: H04M 3/2281 Call monitoring, e.g. for law enforcement purposes; Call tracing; Detection or prevention of malicious calls
• CPC Class Codes: H04M 3/36 Statistical metering, e.g. recording occasions when traffic exceeds capacity of trunks
• CPC Class Codes: H04M 3/38 Graded-service arrangements, i.e. some subscribers prevented from establishing certain connections queuing arrangements H04Q3/64
• CPC Class Codes: H04M 3/382 using authorisation codes or passwords
• CPC Class Codes: H04M 3/387 using subscriber identification cards
• CPC Class Codes: H04M 3/56 Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities video conference systems H04N7/15

Abstract

A telephone station interface is provided with apparatus for detecting when a called party has or is attempting to patch or bridge one telephone call with another telephone call. The detecting of such bridging or conferencing is accomplished through the detection of tones which are commonly associated with such activities, such as a ring signal, a busy signal, special information tones (SIT tones), dual tone multi-frequency (DTMF) tones or so-called Touch Tones, call progress tones, or other tones that occur when calls are placed. The present invention does not have the capability of sensing clicks, pops, or other audio signals associated with the conferencing of multiple communications circuits. The method and apparatus herein are for managing institutional telephone activity, and utilize a computer control unit to control a trunk management unit, which connects institutional telephones to outside telephone lines.

Claims

1. A method for detecting call bridging to a third party during a telephone conversation between a calling party and a called party, comprising:

detecting tones originated by the called party arising during the telephone conversation between the calling party and the called party;

comparing the tones to a predetermined call-bridging tone set to positively identify an attempt to bridge the telephone conversation between the calling party and the called party to include the third party; and

executing call-bridging prevention instructions in response to an identified call-bridging attempt;

wherein the call-bridging tone set includes at least one of dial tones, busy signal tones, ring signal tones, dual tone multi-frequency (“

DTMF”

) tones and special instruction tones (“

SIT”

).

2. The method of claim 1 wherein executing the call-bridging prevention instructions comprises:

terminating the telephone conversation.

3. The method of claim 1 wherein executing the call-bridging prevention instructions comprises:

inserting a warning message into the telephone conversation.

4. The method of claim 1 wherein executing the call-bridging prevention instructions comprises:

recording a telephone number of the third party.

5. The method of claim 1 wherein executing the call-bridging prevention instructions comprises:

comparing a telephone number of the third party against a list of authorized called parties; and

terminating the telephone conversation unless the telephone number of the third party appears on the list of authorized called parties.

6. A method for detecting call bridging to a third party during a telephone conversation between a calling party and a called party, comprising:

detecting tones arising during the telephone conversation between the calling party and the called party;

comparing the tones to a predetermined call-bridging tone set to identify an attempt to bridge the telephone conversation between the calling party and the called party to include the third party; and

executing call-bridging prevention instructions in response to an identified call-bridging attempt,

wherein executing the call-bridging prevention instructions comprises;

terminating the telephone conversation unless an authorization code is received from the third party within a predetermined time period;

wherein the call-bridging tone set includes at least one of dial tones, busy signal tones, ring signal tones, dual tone multi-frequency (“

DTMF”

) tones and special instruction tones (“

SIT”

).

7. A method for detecting call bridging to a third party during a telephone conversation between a calling party and a called party, comprising:

detecting by an answer supervision board tone frequencies originated by the called party arising during the telephone conversation between the calling party and the called party that match a predetermined tone set to identify tone matches;

determining by a computer control unit tone characteristics of tone matches received from the answer supervision board; and

positively identifying by the computer control unit call-bridging attempts by comparing tone matches and tone characteristics received from the answer supervision board with a predetermined call-bridging tone data set; and

executing call-bridging prevention instructions;

wherein the predetermined call-bridging tone data set comprises at least one of dial tones, busy signal tones, ring signal tones, dual tone multi-frequency (“

DTMF”

) tones and special instruction tones (“

SIT”

).

8. The method of claim 7 wherein the call-bridging prevention instructions comprises:

terminating the telephone conversation by the computer control unit after identifying a call-bridging attempt.

9. The method of claim 7 wherein the call-bridging prevention instructions comprises:

introducing a warning message into the telephone conversation by the computer control unit after identifying a call-bridging attempt.

10. The method of claim 7 wherein the call-bridging prevention instructions comprises:

recording a telephone number of the third party by the computer control unit after identifying a call-bridging attempt.

11. The method of claim 7 wherein the call-bridging prevention instructions comprises:

terminating the telephone conversation by the computer control unit after identifying a call-bridging attempt unless a telephone number of the third party appears on a list of authorized called parties.

12. The method of claim 7 wherein the call-bridging prevention instructions comprises:

terminating the telephone conversation by the computer control unit after identifying a call-bridging attempt unless an authorization code is received within a predetermined time period.

13. The method of claim 7 wherein executing the call-bridging prevention instructions comprises:

storing at least one of a calling party calling history or a called party calling history by the computer control unit after identifying a call-bridging attempt.

14. A system for detecting call bridging to a third party during a telephone conversation between a calling party and a called party, comprising:

tone detection means for monitoring the telephone conversation to detect bridging tones originated by the called party arising during the telephone conversation between the calling party and the called party to include a third party and sending bridging tone reports to a computer control unit; and

the computer control unit configured to execute call-bridging prevention instructions upon receipt of a bridging tone report based on the comparison of the detected bridging tones to a predetermined call-bridging tone set;

wherein the tone detection means are configured to detect bridging tones comprising at least one of dial tones, busy signal tones, ring signal tones, dual tone multi-frequency (“

DTMF”

) tones and special instruction tones (“

SIT”

).

15. The system of claim 14 wherein the computer control unit terminates the telephone conversation between the first party an d the second party in executing the call-bridging instructions.

16. The system of claim 14 wherein the computer control unit introduces a warning message into the telephone conversation in executing the call-bridging instructions.

17. The system of claim 14 wherein the computer control unit records a telephone number of the third party in executing the call-bridging instructions.

18. The system of claim 14 computer control unit in executing the call-bridging instructions disconnects the telephone conversation unless the telephone number of the third party appears on a list of authorized called parties.

19. A system for detecting call bridging to a third party during a telephone conversation between a calling party and a called party, comprising:

a computer control unit configured to execute call-bridging prevention instructions upon receipt of a bridging tone report; and

tone detection means for monitoring the telephone conversation to detect bridging tones arising during the telephone conversation between the calling party and the called party and sending bridging tone reports to a computer control unit;

wherein the computer control unit in executing call-bridging prevention instructions terminates the telephone conversation unless an authorization code is received within a predetermined time period;

wherein the tone detection means are configured to detect bridging tones comprising at least one of dial tones, busy signal tones, ring signal tones, dual tone multi-frequency (“

DTMF”

) tones and special instruction tones (“

SIT”

).

20. A system for detecting call bridging to a third party during a telephone conversation between a calling party and a called party, comprising:

an answer supervision board configured to detect tone frequencies originated by the called party arising during the telephone conversation between the calling party and the called party that match a predetermined tone set to determine tone matches; and

a computer control unit configured to determine tone characteristics of tone matches received from the answer supervision board, to positively identify call-bridging attempts by comparing tone matches and tone characteristics with a predetermined call-bridging tone data set, and to execute call bridging prevention instructions after identifying a call bridging attempt,

wherein the answer supervision board is configured to detect tone frequencies comprising at least one of dial tones, busy signal tones, ring signal tones, dual tone multi-frequency (“

DTMF”

) tones, and special instruction tones (“

SIT”

).

21. The system of claim 20 wherein the computer control unit is further configured to terminate the telephone conversation between the calling party and the called party after identifying a call-bridging attempt.

22. The system of claim 20 wherein the computer control unit is further configured to introduce a warning message into the telephone conversation after identifying a call-bridging attempt.

23. The system of claim 20 wherein the computer control unit is further configured to record a telephone number of the third party after identifying a call-bridging attempt.

24. The system of claim 20 wherein after identifying a call-bridging attempt the computer control unit is further configured to compare a telephone number of the third party against a list of authorized called parties and disconnect the telephone conversation unless the telephone number of the third party appears on the list of authorized called parties.

25. The system of claim 20 wherein after identifying a call-bridging attempt the computer control unit is further configured to terminate the telephone conversation unless an authorization code is received within a predetermined time period.

26. The system of claim 20 wherein the computer control unit is further configured to process at least one of a first party calling history or a second party calling history.

27. The system of claim 20, further comprising:

a trunk management unit configured to provide telephony services between the calling party and the called party and further configured to contain the answer supervision board.