Specifications

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Cisco 1700 Series Router Software Configuration Guide
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Chapter 9 Configuring X.25
X.25 over ISDN D Channel
Step 1 Enter the show isdn status command. You should see command output similar to
the following:
Router# show isdn status
The current ISDN Switchtype = basic-5ess
ISDN BRI0 interface
Layer 1 Status:
ACTIVE
Layer 2 Status:
TEI = 80, State = MULTIPLE_FRAME_ESTABLISHED
Layer 3 Status:
No Active Layer 3 Call(s)
Activated dsl 0 CCBs = 0
Total Allocated ISDN CCBs =
Step 2 Confirm that the “State = MULTIPLE_FRAME_ESTABLISHED” message
appears in the command output.
Step 3 If you do not see the message, follow these steps:
a. Make sure that the router is correctly cabled.
b. Make sure that any external NT1 is functioning correctly. Refer to the
documentation that came with the NT1.
c. Make sure the ISDN line is correctly configured by checking with the ISDN
service provider.
d. See the “Troubleshooting X.25 Problems” section on page 9-29 for additional
suggestions.
Configuring Security
Follow these steps to configure security measures.