System and method for facilitating emergency calling from a remote terminal

• US 8,537,974 B2
• Filed: 10/05/2006
• Issued: 09/17/2013
• Est. Priority Date: 10/05/2005
• Status: Active Grant

• Current Assignee: Intrado Life & Safety Incorporated
• Original Assignee: Intrado Incorporated (West Corporation)
• Inventors: Montoya, Alex
• Primary Examiner(s): Gauthier, Gerald
• Application Number:
  US11/538,868
• Publication Number:
  US 20070121802A1
• Time in Patent Office: 2,539 Days
• Field of Search: 379/32.04, 379/33, 379/45, 379/88.2, 379/142.06, 379/266.02, 379/9.05, 379/14, 379/14.01, 379/15.02, 379/15.03, 379/15.04, 379/112.02, 379/221.04, 379/244, 379/279, 379/221.03, 455/127.1, 709/223, 709/228, 725/78
• US Class Current: 379/37
• CPC Class Codes: H04M 3/5116 for emergency applications
• CPC Class Codes: H04Q 2213/1302 Relay switches
• CPC Class Codes: H04Q 2213/1304 Coordinate switches, crossbar, 4/2 with relays, coupling field
• CPC Class Codes: H04Q 2213/13091 CLI, identification of calling line
• CPC Class Codes: H04Q 2213/13097 Numbering, addressing
• CPC Class Codes: H04Q 2213/13102 Common translator
• CPC Class Codes: H04Q 2213/13103 Memory
• CPC Class Codes: H04Q 2213/13106 Microprocessor, CPU
• CPC Class Codes: H04Q 2213/13381 Pair-gain system, digital loop carriers
• CPC Class Codes: H04Q 3/66 Traffic distributors

Abstract

A system and method to expedite special number calls from a remote terminal that employs call control system comprising a control module and a translations database and is connected to the trunk group between the remote terminal and the local switching office. The translations database maintains translations for its associated remote terminal special number calls, including, but not limited to, 9-1-1 calls. When the call control system recognizes a special number call, it performs a look up in its translation database using the line ID as a key and substitutes a destination number for the special number and a calling line telephone number for the line ID. The call control system forwards the call to the local switching office, which treats the call as a trunk-to-trunk call. Advantageously, one (or more) trunk of the trunk group may be reserved solely for special number calls.

Claims

1. A system for expediting a special number call from a remote terminal via a network;

the system comprising;

a remote terminal connected with a controlling local switching office via a call control apparatus;

the local switching office being connected with the network;

the remote terminal supporting a plurality of telephone lines connected with a plurality of remote calling instruments;

each respective remote calling instrument of the plurality of remote calling instruments being situated beyond a range of acceptable wireline transmission from the local switching office; and

the call control apparatus being coupled with the remote terminal and coupled with the local switching office;

the call control apparatus including;

(1) a translations database configured to return a destination number and a calling line identification responsive to a query including a calling line identification received from a respective remote telephone;

(2) a controller configured to determine the calling line identification responsive to a respective remote telephone calling a special number; and

(3) an update interface unit coupled with said controller and with said local switching office;

said update interface unit substantially assuring that updates of at least one predetermined parameter provided to said local switching office are also automatically provided to said controller.

2. A system in accordance with claim 1 wherein the controller is further configured to forward the destination number and the calling line identification to the controlling local switching office.

3. A system in accordance with claim 1 wherein the update interface unit effects said assuring periodically.

4. A system in accordance with claim 1 wherein the translations database is configured to return one of a plurality of destination numbers.

5. A system in accordance with claim 1 wherein the special number comprises 9-1-1.

6. A system in accordance with claim 1 wherein the special number comprises 9-1-1 and the destination number comprises a routing number for a serving public safety answering point.

7. A method that expedites special number calling from a remote terminal via a network;

the remote terminal being connected with a controlling local switching office coupled with the network;

the remote terminal supporting a plurality of lines connected with a plurality of remote calling instruments;

each respective remote calling instrument of the plurality of remote calling instruments being situated beyond a range of acceptable wireline transmission from the local switching office;

the method comprising;

providing a call control system connected on a trunk between the remote terminal and the local switching office;

providing an update interface unit coupled with said call control system and with said local switching office;

said update interface unit substantially assuring that updates of at least one predetermined parameter provided to said local switching office are also automatically provided to said call control system;

intercepting at said call control system a call to 9-1-1 from a respective remote calling instrument comprising a line identification;

determining at said call control system a call delivery number responsive to the line identification employing at least one of said at least one of said at least one predetermined parameter;

determining at said call control system a calling line telephone number responsive to the line identification;

creating at said call control system a call origination comprising the delivery number and the calling line telephone number; and

forwarding the call origination from said call control system to the local switching office.

8. A method in accordance with claim 7 further including:

collecting at said call control system digits from a call origination until a special number is determined.

9. A method in accordance with claim 7 further including:

collecting at said call control system digits from a call origination only until a determination is made that no special number is being called.

10. A method in accordance with claim 7 wherein the call control system includes a translations database and wherein determining the call delivery number comprises applying the line identification to the translations database and wherein determining the calling telephone number comprises applying the line identification to the translations database.

11. A method in accordance with claim 10 further including:

employing said update interface unit for maintaining at said call control system the translations database in synchronization with a database in the local switching office.

12. A method in accordance with claim 11 wherein maintaining the translations database comprises monitoring an office administration and maintenance line connected to the local switching office for changes affecting any of the plurality of lines connected to the remote terminal and applying the changes at said call control system to the translations database.

13. A telephone network comprising:

an answering point configured to serve special number calls;

a local switching office connected to the answering point via a network;

a remote terminal connected to the local switching office and supporting a plurality of lines connected with a plurality of remote calling instruments;

each respective remote calling instrument of the plurality of remote calling instruments being situated beyond a range of acceptable wireline transmission from the local switching office;

a call control system connected between the local switching office and the remote terminal and configured to monitor the plurality of lines for special number calls and further configured to deliver the special number calls to the answering point without intervention by the local switching office; and

an update interface unit coupled with said call control system and with said local switching office;

said update interface unit substantially assuring that updates of at least one predetermined parameter provided to said local switching office are also automatically provided to said call control system.

14. A telephone network in accordance with claim 13 wherein the call control system is configured to send a call origination to the local switching office comprising a destination telephone number and a calling telephone number.

15. A telephone network in accordance with claim 14 wherein the local switching office is configured to treat the call origination as a trunk-to-trunk call.

16. A telephone network in accordance with claim 14 further including a selective router and wherein the destination telephone number causes the local switching office to direct the call to the selective router.

17. A telephone network in accordance with claim 16 wherein the answering point comprises a plurality of answering points and wherein the selective router is configured to determine an answering point responsive to the calling telephone number and further configured to deliver the call origination to the answering point.

18. A telephone network in accordance with claim 16 wherein the answering point comprises a plurality of answering points configured to serve a predetermined area and wherein the selective router is configured to determine an answering point that serves the area of the calling telephone number.

19. A telephone network in accordance with claim 13 wherein the special number comprises 9-1-1 and the answering point comprises a public safety answering point.

20. A telephone network in accordance with claim 13 further comprising:

said update interface unit being embodied in an office administration and maintenance (OA&

M) system configured to update the telephone network;

an OA&

M monitor configured to monitor the OA&

M system for updates that affect any of the plurality of lines and further configured to forward updates that affect any of the plurality of lines to the call control system.