Enable the following trace option settings. These provide information about the ISDN line itself and any calls in progress.
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Tab
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Trace Options
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ISDN
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Layer 1, Layer 2, Layer 3, Layer 1 Send, Layer 1 Receive, Layer 2 Send, Layer 2 Receive, Layer 3 Send and Layer 3 Receive.
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Call
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Extension Send, Extension Receive, Extension TxP, Extension RxP, Line Send, Line Receive, Targetting and Call Logging.
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System
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Error, Print and Resource Status Prints.
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If the problem is with a specific ISDN line then the System Monitor can record info for a specific line by entering an ISDN line number in the Port Number field. ISDN line numbers range from 0 to 8. The line number is displayed in the Configuration Lines List. A blank entry indicates that all ISDN lines are monitored.
