288 CHAPTER 4: L INK LAYER PROTOCOLDescriptionUsing the isdn statistics command, you can have the system make statistics on theinformation received and transmitted at an ISDN interface.By default, no statistics is made on the information transmitted and received atinterfaces.You can input the isdn statistics start command in the view of an interface to startmaking statistics on the messages received and transmitted at the interface, isdnstatistics display command to view the statistic information, isdn statistics continueto continue the effort in making statistics, isdn statistics display flow to view thestatistics in the form of flow, and isdn statistics stop to stop making statistics.ExampleDisplay statistics information on the PRI interface.[3Com-serial0/0/0:15] isdn statistics displayQ.931 message received and sent out on current port:CALL_PROC Send(0) Recv(6)SETUP Send(6) Recv(13)CONN Send(13) Recv(5)SETUP_ACK Send(0) Recv(6)CONNECT_ACK Send(5) Recv(13)DISCONNECT Send(3) Recv(16)RELEASE Send(1) Recv(18)RELEASE_COM Send(18) Recv(1)SLIP ConfigurationCommandsdebugging slip Syntaxdebugging slip { event | error | packet | all }ViewUser viewParameterpacket: Enables packet debugging output switch.DescriptionUsing the debugging slip command, you can enable the debugging switch of theSLIP protocol.ExampleNone