I have a cisco 1841 router which has a WIC-1B S/T interface.There is an ISDN line terminated here.The telco has given a number for this connection. Now users from another country would be dialing this number and gaining access to a server in the LAN behind 1841. I am familiar with the concept of router dialing a number using username,password,dial-string and dialer-remote name. But how can the router be configured for only accepting dial up calls? I mean the router needs to do no dialing, but only accept incomming calls from a remote location.