Here is a screen capture of a Cisco IOS Command Center page for a Cisco AS5300 running Cisco IOS Software Release 12.0(7) T. This is meant to be an example, so the links are not active. For more information about any of these commands, copy the command and use the IOS Command Lookup Tool to display the appropriate command information.

|  Frequently used commands | System  |  Interfaces  |  CallState  |  Advanced Fault Isolation  | Telnet |

show running config	show caller	show int async ?
show version	show caller ip	show int virtual-access ?
show modem version	show caller ?	show int serial?
show file systems	show caller user?	show users
dir	show flash

The Interfaces 

show ip interface brief	show interface Fast Ethernet0	show isdn service
show interface Ethernet0	show controller t1	show isdn status

Call State

show int async ?	show modem	show dialer map
show int serial ?	show modem call-stats	show int dialer ?
clear counters	show modem ?	show ip route
show line	show modem oper ?	show ip route connected
show line ?	show dialer	show ip route static

Advanced Fault Isolation

show logging	show debug	debug isdn q931
clear logging	undebug all	debug modem
debug dialer	debug dialerpacket	debug modem csm
debug ppp negotiation	debug aaa authentication	debug aaa per-user
debug ppp authentication	debug aaa authorization	debug aaa accounting
debug vtemplate	debug vprofile

Telnet