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US 6,650,733 B2Granted
Method of providing 911 service to a private branch exchange
AssigneeAmeritech Corporation
InventorsJohn Joseph Savaglio, Richard Bruce Fowier
Life of this patent
Estimating the term…
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.
Claims6
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.
1 more element
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.
1 more element
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.
7 more elements
Dependencies are inferred from the claim text.