Hi I am using AS5300 with 4 PRIs for incoming dialup connection. My normal dialup connections through PSTN lines are working fine. But when we dial using ISDN bri channel, the connection gets established but it do not passes the traffic. The PC gets the IP assigned but could not ping even to the RAS. When we dial to other brand servers from the same PC and ISDN line, it works normally. Here is configuration of Serial interface for reference. interface Serial0:15 ip unnumbered FastEthernet0 no ip directed-broadcast encapsulation ppp dialer idle-timeout 3600 isdn switch-type primary-net5 isdn incoming-voice modem peer default ip address pool ippool fair-queue 64 256 0 no cdp enable ppp authentication pap ! Please point out what is missing. Thanks _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]