US 5,642,396 AGranted

Release cause table for failed calls in SS7/ISDN Networks

AssigneeMCI, Inc.

InventorGeorge A. Cowgill

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Abstract

A plurality of release action tables are maintained in the switching nodes of a telecommunication network, e.g SS7, ISDN, one table for each trunk group. The table indicates desired actions or treatments to be taken for failed calls, each identified by a cause condition. Upon receiving a cause condition expressed as a code at a switching node, a release action table index is accessed to identify the release action table for the trunk group experiencing the cause condition. The cause code is compared against entries in the release action table by a control program included in the switching node. Based upon such comparison, the table indicates to the network the corrective action to be taken to remedy the failed call condition. Changes to the network for failed call conditions are accomplished by altering the data in the release action table rather than changing network.

Claims5

Dependent claims

In a telecommunications network including a plurality of switching nodes, a plurality of communication links, and a central control/diagnostic facility wherein said network includes means to propagate information backward along a call path in response to a network event, an improved method for processing failed calls at a switching node in response to network events comprising:

placing at said switching node at least one Release Action Table and a control program capable of utilizing said Release Action Table, wherein said Release Action Table indicates the appropriate action to be performed at said switching node as a result of a network event;
obtaining cause information at said switching node relating to said network event;
using said control program to compare said cause information against entries in said Release Action Table to locate a match;
reading from said Release Action Table corresponding action information relating to the appropriate action to take at said switching node in response to said network event;
and
performing the action specified by said action information.

3 more elements

Dependencies are inferred from the claim text.