6.3. ISDN Diagnostic Program

The ISDN Diagnostic program (isdiag) is an interactive tool used to help verify ISDN line operation and to assist in troubleshooting the network trunk. When your application is ready for final installation, running this diagnostic program can help in determining what the network carrier is expecting first.

With the ISDN Diagnostic program running, a trace on the inbound call will detect what the network sent. A trace on a failed outgoing call will show the cause of the failure.

When the ISDN Diagnostic Program is first started, users identify the specific board, channel number (time slot), bus type (SCbus), and board type (T-1 or E-1) on which outgoing calls will be made. Incoming calls may be received on any time slot. For a Linux application, you can use the F1 key to bring up the help screens and for a description of the menu items.

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