METHOD FOR DETERMINING TERMINATION OF AN EMERGENCY SERVICE CALL

• US 20110228911A1
• Filed: 03/19/2010
• Published: 09/22/2011
• Est. Priority Date: 03/19/2010
• Status: Active Grant

• Current Assignee: Intrado Life & Safety Incorporated
• Original Assignee: West Corporation
• Inventors: DeGraff, Anne Marie, Glass, Jodee Marie, Snapp, John Lawrence
• Granted Patent: US 8,559,602 B2
• Time in Patent Office: Days
• US Class Current: 379/45
• CPC Class Codes: H04M 2242/30 Determination of the location of a subscriber
• CPC Class Codes: H04W 4/90 Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
• CPC Class Codes: H04W 76/50 for emergency connections

Abstract

A method for determining termination of an emergency service call; the emergency service call being connected with an emergency service answering entity in an emergency service network employing a locating unit for ascertaining a geographic origin for the emergency service call; the method including: (a) presenting a query signal from the emergency service answering entity during the emergency service call soliciting a responsive signal from the locating unit relating to the geographic origin; (b) if the query signal relating to the geographic origin is received by the locating unit, considering that the emergency service call is not terminated; and (c) if no query signal relating to the geographic origin is received by the locating unit, considering that the emergency service call is terminated.

Claims

1. A method for determining termination of an emergency service call;

said emergency service call being connected with an emergency service answering entity in an emergency service network employing a locating unit for ascertaining a geographic origin for said emergency service call;

the method comprising;

(a) presenting a query signal from said emergency service answering entity during said emergency service call soliciting a responsive signal from said locating unit relating to said geographic origin;

(b) if said query signal relating to said geographic origin is received by said locating unit, considering that said emergency service call is not terminated; and

(c) if no said query signal relating to said geographic origin is received by said locating unit, considering that said emergency service call is terminated.

2. The method for determining termination of an emergency service call as recited in claim 1 wherein said query signal is presented periodically.

3. The method for determining termination of an emergency service call as recited in claim 1 wherein said query signal is a system signal associated with operation of said locating unit.

4. The method for determining termination of an emergency service call as recited in claim 1 wherein said query signal is associated with emergency service routing digits previously assigned in connection with said emergency service call.

5. The method for determining termination of an emergency service call as recited in claim 1 wherein said emergency service routing digits previously assigned in connection with said emergency service call are returned to a pool of emergency service routing digits for later reuse when said emergency service call is terminated.

6. The method for determining termination of an emergency service call as recited in claim 1 wherein said query signal is a system signal associated with operation of said locating unit, and wherein said emergency service routing digits previously assigned in connection with said emergency service call are returned to a pool of emergency service routing digits for later reuse when said emergency service call is terminated.

7. The method for determining termination of an emergency service call as recited in claim 6 wherein said query signal is a system signal associated with operation of said locating unit.

12. The method for determining whether a previously in-progress emergency service call is extant as recited in claim 1 wherein said emergency service routing digits previously assigned in connection with said emergency service call are returned to a pool of emergency service routing digits for later reuse when said emergency service call is no longer extant.

8. A method for determining whether a previously in-progress emergency service call is extant;

said previously in-progress emergency service call being connected with an emergency service answering entity in an emergency service network employing a locating unit for ascertaining a geographic origin for said previously in-progress emergency service call;

the method comprising;

(a) presenting a query signal from said emergency service answering entity soliciting a responsive signal from said locating unit relating to said geographic origin;

(b) if said query signal relating to said geographic origin is received by said locating unit, considering that said previously in-progress emergency service call is extant; and

(c) if no said query signal relating to said geographic origin is received by said locating unit, considering that said previously in-progress emergency service call is not extant.

9. The method for determining whether a previously in-progress emergency service call is extant as recited in claim 8 wherein said query signal is presented periodically.

10. The method for determining whether a previously in-progress emergency service call is extant as recited in claim 8 wherein said query signal is a system signal associated with operation of said locating unit.

11. The method for determining whether a previously in-progress emergency service call is extant as recited in claim 8 wherein said responsive signal is associated with emergency service routing digits previously assigned in connection with said emergency service call.

13. The method for determining whether a previously in-progress emergency service call is extant as recited in claim 8 wherein said query signal is a system signal associated with operation of said locating unit, and wherein said emergency service routing digits previously assigned in connection with said emergency service call are returned to a pool of emergency service routing digits for later reuse when said emergency service call is no longer extant.

14. The method for determining whether a previously in-progress emergency service call is extant as recited in claim 13 wherein said query signal is a system signal associated with operation of said locating unit.

15. A method for determining whether a routing expression associated with a respective emergency service call may be disassociated with said respective emergency service call;

said respective emergency service call being connected with an emergency service answering entity in an emergency service network employing a locating unit for ascertaining a geographic origin for said respective emergency service call;

the method comprising;

(a) presenting a query signal from said emergency service answering entity soliciting a responsive signal from said locating unit relating to said geographic origin;

(b) if said query signal relating to said geographic origin is received by said locating unit, considering that said routing expression associated with said respective emergency service call may not be disassociated with said respective emergency service call; and

(c) if no said query signal relating to said geographic origin is received by said locating unit, considering that said routing expression associated with said respective emergency service call may be disassociated with said respective emergency service call.

16. The method for determining whether a routing expression associated with a respective emergency service call may be disassociated with said respective emergency service call as recited in claim 15 wherein said query signal is presented periodically.

17. The method for determining whether a routing expression associated with a respective emergency service call may be disassociated with said respective emergency service call as recited in claim 15 wherein said query signal is a system signal associated with operation of said locating unit.

18. The method for determining whether a routing expression associated with a respective emergency service call may be disassociated with said respective emergency service call as recited in claim 15 wherein said responsive signal is associated with said routing expression;

said routing expression being comprised of emergency service routing digits previously assigned in connection with said emergency service call.

19. The method for determining whether a routing expression associated with a respective emergency service call may be disassociated with said respective emergency service call as recited in claim 15 wherein said routing expression associated with said respective emergency service call is returned to a pool of routing expressions for later reuse when said respective emergency service call is terminated.

20. The method for determining whether a routing expression associated with a respective emergency service call may be disassociated with said respective emergency service call as recited in claim 16 wherein said query signal is a system signal associated with operation of said locating unit, and wherein said routing expression associated with said respective emergency service call is returned to a pool of routing expressions for later reuse when said respective emergency service call is terminated.