Chapter 5: ISDN Commands:
clear interface | Resets the hardware logic on an interface.
debug dialer | Shows such information as what number the interface is dialing.
debug isdn q921 | Displays data link-layer (Layer 2) access procedures that are taking place at the router on the D channel (LAPD) of its Integrated Services Digital Network (ISDN) interface.
dialer idle-timeout | Specifies the idle time before the line is disconnected.
dialer map | Configures a serial interface to call one or multiple sites.
dialer wait-for-carrier-time | Specifies how long to wait for a carrier.
dialer-group | Controls access by configuring an interface to belong to a specific dialing group.
dialer-list protocol | Defines a DDR dialer list to control dialing by protocol or by a combination of protocol and ACL.
encapsulation ppp | Sets PPP as the encapsulation method used by a serial or ISDN interface.
interface | Configures an interface type and enters interface configuration mode.
isdn spid1 | Defines at the router the service profile identifier (SPID) number that has been assigned by the ISDN service provider for the B1 channel.
isdn spid2 | Defines at the router the SPID number that has been assigned by the ISDN service provider for the B2 channel.
isdn switch-type | Specifies the central office switch type on the ISDN interface.
ping | Sends ICMP echo request packets to another node on the network. Checks host reachability and network connectivity. Diagnoses basic network connectivity.
ppp authentication | Enables Challenge Handshake Authentication Protocol (CHAP) or Password Authentication Protocol (PAP) or both, and specifies the order in which CHAP and PAP authentication are selected on the interface.
show dialer | Displays general diagnostics for serial interfaces configured for DDR.
show interfaces | Displays statistics for all interfaces configured on the router or access server.
show ip route | Displays the current state of the routing table.
show isdn active | Displays current call information, including called number, the time until the call is disconnected, AOC charging units used during the call, and whether the AOC information is provided during calls or at the end of calls.
show isdn status | Displays the status of all ISDN interfaces or, optionally, a specific digital signal link (DSL) or a specific ISDN interface.
show status | Displays the current status of the ISDN line and both B channels.