Method of operating a distributed call progress tone detection system

• US 20060159252A1
• Filed: 03/20/2006
• Published: 07/20/2006
• Est. Priority Date: 02/13/2002
• Status: Active Grant

• Current Assignee: Mitel Communications Inc. (Mitel Networks Corporation)
• Original Assignee: Aastra USA Incorporated (Mitel Networks Corporation)
• Inventors: Osborn, James G., Chambers, L. David, Dye, Steve E.
• Granted Patent: US 7,471,787 B2
• Time in Patent Office: Days
• US Class Current: 379/265.20
• CPC Class Codes: H04M 11/066 Telephone sets adapted for data transmision
• CPC Class Codes: H04M 2203/2027 Live party detection
• CPC Class Codes: H04M 3/5158 in combination with automated outdialling systems devices for signalling identity of wanted subscriber H04M1/26

Abstract

A method of operating a distributed call progress tone detection system. In one embodiment, the method includes: (1) receiving requests from an application over said packet network and transmitting transmit call and control processing commands to a switching partition via a main control unit, (2) providing an interface to corresponding access nodes via line interface modules, (3) generating a call on a first of said line interface modules, (4) employing an input-output distributor to interconnect a call progress tone detector and said first of said line interface modules to allow said call progress tone detector to perform a call progress tone detection analysis and generate an indication thereof with respect to said first of said line interface modules and (5) creating an interconnection between said first of said line interface modules and a second of said line interface modules based on said indication via said input-output distributor and notifying said application of said interconnection.

Claims

1. A method of operating a distributed call progress tone detection system couplable to a packet network, comprising:

receiving requests from an application over said packet network and transmitting transmit call and control processing commands to a switching partition via a main control unit;

providing an interface to corresponding access nodes via line interface modules;

generating a call on a first of said line interface modules;

employing an input-output distributor to interconnect a call progress tone detector and said first of said line interface modules to allow said call progress tone detector to perform a call progress tone detection analysis and generate an indication thereof with respect to said first of said line interface modules; and

creating an interconnection between said first of said line interface modules and a second of said line interface modules based on said indication via said input-output distributor and notifying said application of said interconnection.

2. The method as recited in claim 1 wherein said call progress tone detection analysis further includes performing energy detection.

3. The method as recited in claim 1 wherein said call progress tone detection analysis further includes performing energy detection with guard band elimination.

4. The method as recited in claim 1 wherein said call progress tone detection analysis further includes receiving at least one tunable parameter and adjusting said call progress tone detection analysis on a call-by-call basis thereof.

5. The method as recited in claim 4 wherein said at least one tunable parameter is selected from the group consisting of:

a software answer detect time,

a hardware answer detect time,

a ring no answer time,

a minimum call answer time,

a recorded human speech detect time,

a maximum resource wait time, and

a pause wait time after speech detected.

6. The method as recited in claim 1 wherein said indication is selected from the group consisting of:

a busy tone,

a reorder tone,

a ring back tone with no answer,

a human speech with answer quickly,

a human speech with pause detected after speech,

a recorded human speech,

a facsimile/modem,

a Telco Intercept, and

a no energy detected before answer detect time expired.

7. The method as recited in claim 1 wherein said line interface modules are dynamically configurable via program downloads.

8. The method as recited in claim 1 wherein said call progress tone detector may be embodied within at least one of said line interface modules.

9. The method as recited in claim 1 wherein said call progress tone detector may be embodied within software downloaded to at least one of said line interface modules.

10. The method as recited in claim 1 further comprising notifying said application of said indication.

11. The method as recited in claim 1 wherein said call and control processing commands are selected from the group consisting of:

a no answer supervision command,

a use network answer supervision command,

a best try full analysis command, and

a full call progress analysis command.

12. The method as recited in claim 1 further comprising auto-terminating a call on said first of said line interface modules if an access node coupled to said second of said line interface modules is unavailable.

13. The method as recited in claim 12 wherein said auto-terminating further includes elapsing a timeout period, associated with an availability of said access node, before said auto-terminating said call.

14. The method as recited in claim 1 further comprising said application and wherein said application is selected from the group consisting of:

a non-predictive dialer,

a predictive dialer,

an answering machine dialer, and

a call center.

15. The method as recited in claim 1 further comprising, upon receiving said notification, transmitting information associated with said request to a terminal coupled to a third of said line interface modules that is associated with said second of said line interface modules via said application.

16. The method as recited in claim 1 wherein said input-output distributor employs a circuit-switched matrix to control and selectively interconnect said line interface modules and said call progress tone detector.