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Chapter 8
Troubleshooting ISDN
Key Terms
Before you take the exam, be certain you are familiar with the following terms:
access lists
Challenge Handshake Authentication Protocol (CHAP)
dialer map statements
ISDN BRI
Layer 1 S/T Interface
Link Access Procedure Protocol(LAPD)
LT/ET
NT1
q.921
q.931
Command
Description
show dialer
Reports information regarding the
DDR connections, including the
number dialed, the success of the
connection, the idle timers that
control the duration of a DDR
connection without data packets,
and the number of calls that were
screened or rejected due to
administrative policy.
show interface bri n
Reports the B channel's status, as
well as spoofing on the interface.
show interface bri1 2 n
Displays a single B channel of the
BRI interface.
show isdn status
Reports the status of the interface, as
well as a breakdown of each layer.
show ppp multilink
Displays configuration settings for
PPP Multilink.
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