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Welcome to Cisco Support Community. We would love to have your feedback.

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New Member

null Username & Password

I want no authentication to some users dial in to a specific telephone number in my AS5200.


Re: null Username & Password

Since there has been no response to your post, it appears to be either too complex or too rare an issue for other forum members to assist you. If you don't get a suitable response to your post, you may wish to review our resources at the online Technical Assistance Center ( or speak with a TAC engineer. You can open a TAC case online at

If anyone else in the forum has some advice, please reply to this thread.

Thank you for posting.

New Member

Re: null Username & Password

Hi, take a look at new feature ISDN Preauthentication and Radius. there you will find your solution! don´t know ecactly if feature is suppoertet in IOS for AS5200, but shure for AS5300.

kind regards

Michael Friedl (Datakom Austria)

New Member

Re: null Username & Password

Hi my name is Leonardo, and i am working with Preauthentication on a telco with ios 12.1(3)T, and AS5300.

I have some problems with it

Have you any experience of it?, can you give some config examples of it?,

Really Very thanks.


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