Terminating ISDN calls return a Q.850 Cause Code when they end. We can use these codes to determine whether or not to reroute the call to another signalling group via additional configured entries in the Call Route Table. A Cause Code Reroute table contains one or more Q.850 Cause Codes which, when matched, trigger a reroute. To use a table created here, select it from the Cause Code Reroute field in a Call Routing Table entry.
In the left navigation pane, go to Telephony Mapping Tables > Cause Code Reroutes.
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To delete an entry, select the checkbox next to the entry and then click the Delete () icon.