497Chapter 42 VoIP debuggingChapter contentsIntroduction ........................................................................................................................................................498Debugging strategy..............................................................................................................................................498Verifying IP connectivity .....................................................................................................................................499Debugging call signaling......................................................................................................................................499Debugging ISDN signaling ...........................................................................................................................500Verify an incoming call ...........................................................................................................................500Verify an outgoing call ............................................................................................................................502Verify ISDN layer 1,2,3 status ................................................................................................................503Debugging FXS Signaling .............................................................................................................................504Verify an incoming call ...........................................................................................................................504Verify an outgoing call ............................................................................................................................505Debugging H.323 Signaling .........................................................................................................................506Verify an incoming call ...........................................................................................................................507Verify an outgoing call ............................................................................................................................508Debugging SIP signaling ...............................................................................................................................510Verify an incoming call ...........................................................................................................................511Verify an outgoing call ............................................................................................................................511Using SmartWare’s internal call generator .....................................................................................................512Debugging voice data ..........................................................................................................................................513Check system logs .........................................................................................................................................515How to submit trouble reports to Patton ......................................................................................................515