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US 6,205,210 B1Granted
Method for improved automatic message accounting in telephony
AssigneeNortel Networks Limited
InventorsGordon L. Rainey, Allan Melnyk
Life of this patent
Estimating the term…
Abstract
A method for improved automatic message accounting in telephony systems and the like, wherein actual call routing set-up is stored at the time of a call being answered by a called subscriber station; and the data conveying the actual call routing set-up is packaged in a data field of a message for upstream transmission through the actual call routes.
Claims4
A method for automatic message accounting in a telephony system, comprising:
- (a) receiving, by a switch, an initial address message (IAM) requesting connection by an incoming trunk to a ported subscriber that is currently residing on the switch;
- (b) decomposing the IAM to obtain call data in order to recover a called number and at least one of a generic address parameter (GAP) and a location routing number (LRN);
- (c) establishing a connection to a called party and monitoring for an answer by the called party;
- (d) when the monitoring step determines that the called party has answered, formulating an answer message that is sent in a direction towards a preceding switch that incorporates the GAP or the LRN in call data, and storing actual call routing set-up at time of a call being answered by a called subscriber station;
- (e) sending the answer message out on a link associated with an incoming trunk connected to the called party, and packaging data conveying said actual call routing set-up in a data field of a message for upstream transmission through actual call routes;
- and
- (f) when the connection is finished, taking down the connection between the incoming trunk and the called party.
4 more elements
Dependencies are inferred from the claim text.