I have a Xircom Creditcard Isdn adapter and I cannot dial into a Cisco 1603 router. I can get as far as being authenticated and then the router drops the call
What operating system are you using? Do you get authenticated and is the connection then dropped, or is it being dropped during the authentication? Do you have access to the router (and it's config)? What is/are the authentication protocol/-s used? What does the debug output look like (debug ppp auth / debug ppp nego / debug isdn q931 / debug dialer ev ? etc.
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