Method of providing 911 service to a private branch exchange

• US 6,650,733 B2
• Filed: 10/23/2002
• Issued: 11/18/2003
• Est. Priority Date: 03/08/2002
• Status: Expired due to Fees

• Current Assignee: SBC Properties, L.P. (AT&T, Inc.)
• Original Assignee: Ameritech Corp. (AT&T, Inc.)
• Inventors: Savaglio, John Joseph, Fowier, Richard Bruce
• Primary Examiner(s): CHAN, WING F
• Application Number:
  US10/278,602
• Publication Number:
  US 20030169855A1
• Time in Patent Office: 391 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
• CPC Class Codes: H04M 2242/22 Automatic class or number identification arrangements
• 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 3/51 Centralised call answering arrangements requiring operator intervention , e.g. call or contact centers for telemarketing
• 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 to a private branch exchange, comprising the steps of:

a) grouping a first plurality of private telephone numbers into a first set;

b) grouping a second plurality of telephone numbers into a second set; and

c) assigning an outgoing telephone line for a 911 call to the first set.

2. The method of claim 1, wherein step (a) further includes the step of:

a1) selecting the first plurality of private telephone numbers by an origination location.

3. A method of providing 911 service to a private branch exchange, comprising the steps of:

a) determining a dialing telephone number;

b) looking up an associated outgoing telephone line; and

c) placing the 911 call over the associated outgoing telephone line.

4. The method of claim 3, wherein step (a) further includes the step of:

a1) receiving the 911 call at the private branch exchange.

5. The method of claim 3, further including the steps of:

d) routing the 911 call to a public safety answering point;

e) sending a location query to a location database.

6. A method of providing 911 service to a private branch exchange, comprising the steps of:

a) grouping a plurality of private telephone lines according to their location to form a set;

b) assigning a public telephone line to any 911 call from the plurality of private telephone lines;

c) informing a location database of a location information associated with the public telephone line;

d) when a 911 call is received at the private branch exchange, determining the public telephone line assigned to a private line initiating the 911 call;

e) routing the 911 call to a service switching point;

f) forwarding the 911 call to a switch at a public safety answering point;

g) triggering on the 911 call and forming a location query at the switch;

h) sending the location query to the location database; and

i) forwarding the location information to one a plurality of operators at the public safety answering point.