Cost-effective, multichannel digital logger

• US 8,116,449 B2
• Filed: 04/13/2009
• Issued: 02/14/2012
• Est. Priority Date: 04/19/2004
• Status: Expired due to Fees

• Current Assignee: Computer Performance Incorporated
• Original Assignee: Computer Performance Incorporated
• Inventors: Bodo, Martin J., Rosenbloom, Robert A.
• Primary Examiner(s): Nguyen, Joseph J
• Application Number:
  US12/386,070
• Publication Number:
  US 20090285368A1
• Time in Patent Office: 1,037 Days
• Field of Search: 379/219, 379/207.02, 379/88.2, 379/51, 379/93.02, 370/468, 370/485, 370/489, 370/503, 704/200
• US Class Current: 379/414
• CPC Class Codes: H04M 3/2281 Call monitoring, e.g. for law enforcement purposes; Call tracing; Detection or prevention of malicious calls

Abstract

A digital logger system includes a multichannel interface circuit that:

• • 1. concurrently and continuously-receives audio telecommunication signals for at least two telephone calls from a digital hybrid telephone line; and
  • 2. continuously transmits linearly encoded digital audio data representing the received audio signals.
    A Universal Serial Bus (“USB”) hub of the system receives the transmitted digital data for retransmission to a USB root hub. A USB root hub of personal computer (“PC”) receives transmitted digital data, and executes PC software which continuously monitors the digital data for embedded line status and signaling information including a telephone line “going off hook.” When a telephone line goes “off hook,” the software records both:
  • 1. an audio header that stores information about a telephone call; and
  • 2. an audio file that stores compressed digital data for the telephone call. Jul. 2, 2009.

Claims

1. A digital logger system adapted for receiving and recording audio telecommunication signals, the digital logger system comprising:

a multichannel interface circuit for concurrently and continuously receiving digital audio telecommunication signals for at least two telephone calls from a digital hybrid telephone line, and for transmitting digital audio data extracted from the received digital audio telecommunication signals received via the digital hybrid telephone line, the multichannel interface circuit including;

a. a line interface for electronically conditioning digital audio telecommunication signals received from the digital hybrid telephone line;

b. a framer which receives the conditioned digital audio telecommunication signals from the line interface, interfaces the physical layer of digital hybrid telephone line signals received from the line interface, and transmits digital audio data extracted from the received digital audio telecommunication signals; and

c. a peripheral controller for exchanging digital audio data with the framer and with a Universal Serial Bus (“

USB”

) hub;

a USB hub for receiving the digital audio data transmitted from the peripheral controller, and for transmitting the digital audio data to a USB root hub; and

a personal computer (“

PC”

) having a USB root hub that is coupled to the USB hub, and which PC;

receives the digital audio data transmitted from the USB hub; and

executes software that continuously monitors the received digital audio data for;

decoding line status and signaling information embedded in digital audio data to determine status of a telephone line including a telephone line “

going off hook;

” and

upon detecting a telephone line “

going off hook,”

recording both;

an audio header that stores information about a telephone call; and

an audio file that stores compressed digital audio data for the telephone call.

2. The digital logger system of claim 1 wherein software executed by the PC includes a search engine which upon detecting Dual-Tone Multifrequency (“

DTMF”

) signaling for a telephone call initiates a real-time reverse-lookup which accesses publicly accessible directories and business information.

3. The digital logger system of claim 1 wherein software executed by the PC includes a search engine which upon detecting Automatic Number Identification (“

ANI”

) {also known as Caller ID (“

CID”

)} for a telephone call initiates a real-time reverse-lookup which accesses publicly accessible directories and business information.

4. The digital logger system of claim 1 wherein software executed by the PC includes a search engine which upon detecting Automatic Location Identification (“

ALI”

) for a telephone call initiates a real-time reverse-lookup which accesses publicly accessible directories and business information.

5. The digital logger system of claim 1 wherein upon detecting a telephone line “

going off hook,”

software executed by the PC transmits digital audio data to the multichannel interface circuit which causes the multichannel interface circuit to transmit an audible announcement to a caller via that telephone line.

6. A signal processor adapted for use with a PC that includes a USB root hub, and that executes PC software for continuously monitoring digital audio data received via the USB root hub, the PC software:

decoding line status and signaling information embedded in digital audio data to determine status of a telephone line including a telephone line “

going off hook;

” and

upon detecting a telephone line “

going off hook,”

recording both;

an audio header that stores information about a telephone call; and

an audio file that stores compressed digital audio data for the telephone call;

the signal processor comprising;

a. a multichannel interface circuit for concurrently and continuously receiving digital audio telecommunication signals for at least two telephone calls from a digital hybrid telephone line, and for transmitting digital audio data extracted from the received digital audio telecommunication signals received via the digital hybrid telephone line, the multichannel interface circuit including;

i. a line interface for electronically conditioning digital audio telecommunication signals received from the digital hybrid telephone line;

ii. a framer which receives the conditioned digital audio telecommunication signals from the line interface, interfaces the physical layer of digital hybrid telephone line signals received from the line interface, and transmits digital audio data extracted from the received digital audio telecom- munication signals; and

iii. a peripheral controller for exchanging digital audio data with the framer and with a USB hub, and

b. a USB hub for receiving the digital audio data transmit- ted from the peripheral controller, and for transmitting the digital audio data to the USB root hub of the PC.

7. A digital logger system adapted for receiving and recording audio telecommunication signals, the digital logger system comprising:

a multichannel interface circuit for concurrently and continuously receiving digital audio telecommunication signals for at least two telephone calls from a digital hybrid telephone line, and for transmitting digital audio data extracted from the received digital audio telecommunication signals received via the digital hybrid telephone line, the multichannel interface circuit including;

a. a line interface for electronically conditioning digital audio telecommunication signals received from the digital hybrid telephone line;

b. a framer which receives the conditioned digital audio telecommunication signals from the line interface, interfaces the physical layer of digital hybrid telephone line signals received from the line interface, and transmits digital audio data extracted from the received digital audio telecommunication signals; and

c. a peripheral controller for exchanging digital audio data with the framer and with a USB hub;

a USB hub for receiving the digital audio data transmitted from the peripheral controller, and for transmitting the digital audio data to a USB root hub; and

a PC having a USB root hub that is coupled to the USB hub, and which PC;

receives the digital audio data transmitted from the USB hub; and

executes software that when a telephone line goes “

off hook,”

records both;

an audio header that stores information about a telephone call; and

an audio file that stores compressed digital audio data for the telephone call.

8. The digital logger system of claim 7 wherein software executed by the PC includes a search engine which upon detecting DTMF signaling for a telephone call initiates a real-time reverse-lookup which accesses publicly accessible directories and business information.

9. The digital logger system of claim 7 wherein software executed by the PC includes a search engine which upon detecting ANI {also known as CID} for a telephone call initiates a real-time reverse-lookup which accesses publicly accessible directories and business information.

10. The digital logger system of claim 7 wherein software executed by the PC includes a search engine which upon detecting ALI for a telephone call initiates a real-time reverse-lookup which accesses publicly accessible directories and business information.

11. The digital logger system of claim 7 wherein upon detecting a telephone line “

going off hook,”

software executed by the PC transmits digital audio data to the multichannel interface circuit which causes the multichannel interface circuit to transmit an audible announcement to a caller via that telephone line.

12. A signal processor adapted for use with a PC that includes a USB root hub, and that executes PC software for monitoring digital audio data received via the USB root hub, the PC software:

upon detecting a telephone line “

going off hook,”

recording both;

an audio header that stores information about a telephone call; and

an audio file that stores compressed digital audio data for the telephone call;

the signal processor comprising;

a. a multichannel interface circuit for concurrently and continuously receiving digital audio telecommunication signals for at least two telephone calls from a digital hybrid telephone line, and for transmitting digital audio data extracted from the received digital audio telecommu- nication signals received via the digital hybrid tele- phone line, the multichannel interface circuit including;

i. a line interface for electronically conditioning digital audio telecommunication signals received from the digital hybrid telephone line;

ii. a framer which receives the conditioned digital audio telecommunication signals from the line interface, interfaces the physical layer of digital hybrid telephone line signals received from the line interface, and transmits digital audio data extracted from the received digital audio telecom- munication signals; and

iii. a peripheral controller for exchanging digital audio data with the framer and with a USB hub, and

b. a USB hub for receiving the digital audio data transmitted from the peripheral controller, and for transmitting the digital audio data to the USB root hub of the PC.