I have a Cisco 3600 with a Primary rate card, x21 leased line connection as well as an ethernet port. The x21 serves our Internet connection whilst the Primary ISDN is for dialling in to customers. I've setup dialer interfaces and IP routes and when I ping the remote router the correct number is dialled, CHAP takes place and is successful and the connection is made. But I don't get any response from the remote router. I know the remote router is working as I've dialled into it using another router and the pings work. What things do I need to check to see where the problem lies? There seems to be a sprinkling of access-list permit commands and 1 dialer-list permit command. What are these for? If I remove them all will the default mean that nothing will get through ? What sort of debugging commands can I turn on to aid the process? Any help gratefully received. Andy _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]