6. Debugging Applications

This chapter describes the GlobalCall Diagnostic utilities (isdiag) used to test and debug ISDN applications by focusing on the connection between the application and the ISDN network. These utilities can help provide a better understanding of the effects of various ISDN configuration options on the application.

The diagnostic utilities included in the GlobalCall API ISDN software package comprise:

• ISDN Network Firmware (NT1 and NE1) - to provide network side emulation
• ISDN Diagnostic Program (isdiag) - to initiate calls, alter call set-up parameters, and initiate traces of the D channel activity on the trunk
• ISDTRACE Utility (isdtrace) - to easily convert the binary trace files (filename.log) of the D channel communications into a formatted text file (filename.res) that is easy to read and analyze. The binary trace file is generated using the gc_StartTrace( ) and gc_StopTrace( ) functions.

The ISDN Diagnostic utilities:

• aid in understanding the characteristics of an ISDN network trunk in real-time
• reduce the need for a live network trunk or international service connections
• simplify troubleshooting a connection

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