METHOD OF PROVIDING 911 SERVICE TO A PRIVATE BRANCH EXCHANGE

• US 20090034691A1
• Filed: 10/14/2008
• Published: 02/05/2009
• Est. Priority Date: 08/21/2000
• Status: Active Grant

• Current Assignee: Ameritech Corp. (AT&T, Inc.)
• Original Assignee: Ameritech Corp. (AT&T, Inc.)
• Inventors: Savaglio, John Joseph, Fowler, Richard Bruce
• Granted Patent: US 7,974,389 B2
• Time in Patent Office: Days
• 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.