Method of providing 911 service

• US 7,436,938 B2
• Filed: 01/18/2005
• Issued: 10/14/2008
• Est. Priority Date: 08/21/2000
• Status: Expired due to Fees

• Current Assignee: AT&T Knowledge Ventures, L.P. (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Savaglio, John Joseph, Fowler, Richard Bruce
• Primary Examiner(s): Woo, Stella L
• Application Number:
  US11/037,524
• Publication Number:
  US 20050123103A1
• Time in Patent Office: 1,365 Days
• Field of Search: 379 37- 51
• US Class Current: 379/45
• CPC Class Codes: H04M 2207/12 intelligent networks
• CPC Class Codes: H04M 2242/04 for emergency applications
• CPC Class Codes: H04M 2242/14 with services dependent on location where the service is an information service H04M2242/15; services independent of location H04M3/42229
• CPC Class Codes: H04M 2242/22 Automatic class or number identification arrangements
• CPC Class Codes: H04M 2242/30 Determination of the location of a subscriber
• CPC Class Codes: H04M 3/42042 Notifying the called party of information on the calling party details within substation equipment H04M1/57, signalling details H04Q3/72
• CPC Class Codes: H04M 3/42059 Making use of the calling party identifier
• CPC Class Codes: H04M 3/42314 in private branch exchanges
• CPC Class Codes: H04M 3/51 Centralised call answering arrangements requiring operator intervention , e.g. call or contact centers for telemarketing
• CPC Class Codes: H04M 3/5116 for emergency applications
• CPC Class Codes: H04M 7/009 in systems involving PBX or KTS networks

Abstract

A method of providing 911 service to a private branch exchange, includes grouping a plurality of private telephone numbers into a set. An outgoing telephone line for a 911 call is assigned to the set. A location information for the outgoing telephone line is input into a location database.

Claims

1. A method of providing 911 service, comprising:

determining if a 911 call has been placed;

when the 911 call has been placed, inherently determining at a private branch exchange a location of a telephone placing the 911 call by looking up an outgoing telephone line associated with the telephone placing the 911 call; and

routing the 911 call to a service switching point after the location of the telephone has been determined.

2. The method of claim 1, further including:

routing the 911 call to a public safety answering point via the outgoing telephone line.

3. The method of claim 1, further including:

selecting an internal telephone line;

determining a location of a telephone associated with the internal telephone line;

assigning the outgoing telephone line to the internal telephone line for 911 calls.

4. The method of claim 3, further including:

entering location information in association with the outgoing telephone line in a location database to indicate the physical location of telephones placing 911 calls over the outgoing telephone line.

5. A method providing 911 service, comprising:

identifying a telephone placing a 911 call at a private branch exchange;

selecting an outgoing telephone line for the 911 call based on the identity of the telephone placing the 911 call; and

placing the 911 call via the outgoing telephone line to indicate a physical location of the telephone placing the 911 call.

6. The method as defined in claim 5 wherein an identity of the outgoing telephone line is inherently indicative of the physical location of the telephone placing the 911 call.