Link Layer ProtocolChapter 4 ISDN Configuration Commands4.1 ISDN Configuration Commands4.1.1 debugging isdnSyntaxdebugging isdn { cc | q921 | q931 | qsig { alarm | call-state | error | information |message | all } } [ interface type number ]ViewAll viewsParameteralarm: To display alarm information.call-state: To display calling status and timeout information of timer.error: To display error information.information: To display general prompt information.message: To display description information of message.all: To display all debugging information.interface type number: Interface type and number. This parameter is used fordebugging ISDN signaling on a specified ISDN interface. If no interface is specified bythis parameter, ISDN signaling debugging on all the ISDN interfaces will be enabled.DescriptionUsing the debugging isdn command, you can enable ISDN signaling debugging.This command is used to enable the debugging of various types of ISDN signaling andcheck the status of different layers at the ISDN PRI interface on a router. You maylocate and solve the problems according to debugging information.ExampleNone4.1.2 dialer data2voiceSyntaxdialer data2voiceundo dialer data2voice29
