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New Member

ISDN callback

I configured a router 1720 with two ISDN bri WIC's

When somebody calls to my router it accepts the call and wants to call back.

When this happens I get the message (debugging) can not bring interface up.

Can somebody help me ?

1 REPLY
Bronze

Re: ISDN callback

Hard to say without more details, like the specific debug message (I think it is "Could not bring up interface") and the version of code that you are using. Also not sure if the TEIs are being torn down after each call, or if they are up all the time (isdn tei powerup). It could be that we are attempting the callback too quickly after the first call was cleared. You might try increasing the "dialer enable-timeout" (It's 15 seconds by default) to see if that helps; otherwise, just to be safe you might ensure that you are using recent code.

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