Method of providing 911 service to a private branch exchange

• US 20050123103A1
• Filed: 01/18/2005
• Published: 06/09/2005
• Est. Priority Date: 08/21/2000
• Status: Active Grant

• Current Assignee: AT&T Knowledge Ventures, L.P. (AT&T, Inc.)
• Original Assignee: AT&T Knowledge Ventures, L.P. (AT&T, Inc.)
• Inventors: Savaglio, John Joseph, Fowler, Richard Bruce
• Granted Patent: US 7,436,938 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 to a private branch exchange, comprising the steps of:

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

b) assigning an outgoing telephone line for a 911 call to the set; and

c) inputting a location information for the outgoing telephone line in a location database.

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

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

3. The method of claim 1, wherein step (b) further includes the step of:

b1) programming a private branch exchange to select the outgoing telephone line, when the 911 call is received from one of the plurality of private telephone numbers.

4. The method of claim 1, further including the step of:

d) when the 911 call is dialed from one of the plurality of private telephone numbers, sending the 911 call out over the outgoing telephone line.

5. The method of claim 4, further including the steps of:

e) triggering on the 911 call at a service switch point;

f) transmitting a routing query to a switching control point;

g) receiving a routing instruction from the switching control point.

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

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

i) querying a location database for a location associated with a telephone number of the outgoing telephone line.

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

a) receiving a 911 call at a private switch;

b) determining a dialing telephone number;

c) looking up an associated outgoing telephone line; and

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

8. The method of claim 7, wherein step (a) further includes the step of:

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

9. The method of claim 7, further including the steps of:

e) receiving the 911 call at a service switching point;

f) triggering on the 911 call and sending a query to a switching control point;

g) receiving a response including a routing instruction.

10. The method of claim 9, wherein step (g) further includes the step of:

g1) receiving the response including a number of the associated outgoing telephone line.

11. The method of claim 9, further including the steps of:

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

i) sending a location query to a location database.

12. The method of claim 11, further including the steps of:

j) forwarding the 911 call to an operator;

k) transmitting a location information to the operator.

13. The method of claim 7, wherein step (a) further includes the steps of:

a1) grouping a first plurality of private telephone numbers into a first set;

a2) grouping a second plurality of private telephone numbers into a second set;

a3) assigning one of a plurality of outgoing telephone lines to the first set;

a4) assigning a second of the plurality of outgoing telephone lines to the second set.

14. The method of claim 13, further including the step of:

a5) programming a location database to include a location for the one of the plurality of outgoing telephone lines.

15. The method of claim 14, further including the steps of:

a6) programming the location database to include a second location for the second of the plurality of outgoing telephone lines.

16. 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 private telephone numbers into a second set;

c) assigning one of a plurality of outgoing telephone lines to the first set;

d) assigning a second of the plurality of outgoing telephone lines to the second set;

e) programming a location database to include a location for the one of the plurality of outgoing telephone lines;

f) programming the location database to include a second location for the second of the plurality of outgoing telephone lines;

g) receiving a 911 call at a private switch;

h) determining a dialing telephone number;

i) determining if the dialing telephone number belongs in the first set or the second set; and

j) when the dialing telephone number belongs in the first set, placing the 911 call over the one of the plurality of outgoing telephone lines.

17. The method of claim 16, further including the step of:

k) when the dialing telephone number belongs in the second set, placing the 911 call over the second of the plurality of outgoing telephone lines.

18. The method of claim 16, further including the steps of:

k) receiving the 911 call at a service switching point;

l) triggering on the 911 call and sending a query to a switching control point;

m) receiving a response including a routing instruction.

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

i) sending a location query to the location database

j) forwarding the call to an operator; and

k) transmitting a location information to the operator.