83
[Router-Bri2/0] isdn spid service speech
[Router-Bri2/0] quit
# Configure a dialer interface.
[Router] interface dialer 1
[Router-Dialer1] link-protocol ppp
[Router-Dialer1] ppp pap local-user user password simple hello
[Router-Dialer1] dialer threshold 0 in-out
[Router-Dialer1] ppp mp
[Router-Dialer1] ip address ppp-negotiate
[Router-Dialer1] dialer enable-circular
[Router-Dialer1] dialer-group 1
[Router-Dialer1] dialer number 8810148
[Router-Dialer1] quit
# Configure the static route to segment 65.0.0.0 where the network access server is located.
[Router] ip route-static 65.0.0.0 255.0.0.0 Dialer 1 preference 60
To interoperate with the DMS 100, configure two commands: isdn two-tei and isdn
number-property 0. The isdn two-tei command allows each call on the BRI interface to use a
unique TEI. The isdn number-property 0 command sets the numbering plan and numbering type in
the called-party information element in ISDN Q.931 SETUP messages to unknown.
In addition, if the carrier allocates an LDN, you must configure it.
The dialer threshold 0 in-out command configured on interface dialer 1 allows the system to bring
up another B channel automatically after bringing up a BRI link. This can be done without a flow
control mechanism and the links that have been brought up will not be disconnected automatically.
Troubleshooting
Symptom
Two routers are interconnected through an ISDN PRI or BRI line and they cannot ping each other.
Analysis
The causes may be:
• The interface is not configured or activated.
• The dial-up configuration is wrong.
• The line is not well connected.
Solution
• Execute the display isdn call-info command. If no prompt appears in the system, it indicates
no ISDN PRI interface exists. It is necessary to configure interfaces. For a specified
configuration method, see the contents about configuration of CE1/PRI interface and CT1/PRI
interface in Interface module. If ISDN is not in multi-frame operation status on a PRI interface,
or if ISDN is not in TEI_ASSIGNED status on a BRI interface, it might not be physically
connected well.
• If Q.921 debugging has been enabled, and ISDN on PRI is in multi-frame creation mode and
that on BRI is in TEI configured mode, check whether dial-up configuration is correct. If the
maintaining information "Q921 send data fail (L1 return failure)." is output, it indicates that the
physical layer has not been activated. In this case, execute the shutdown or undo shutdown
command to disable or re-enable interfaces.
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