We have an ADSL WIC in a 3640 with a T1 which is normal mode of use unless the T1 fails. We cannot seem to bring up a connection with the ADSL line and see this all the time. 00:19:59: Vi1 CHAP: I CHALLENGE id 241 len 38 from "RASI1NRP2.Ilford2" 00:19:59: Vi1 PPP: Sent CHAP SENDAUTH Request to AAA 00:19:59: Vi1 PPP: Received SENDAUTH Response from AAA = FAIL 00:19:59: Vi1 CHAP: Unable to authenticate for peer 00:19:59: Vi1 PPP: Authorization NOT required 00:20:01: Vi1 PPP: Authorization NOT required 00:20:05: Vi1 CHAP: I CHALLENGE id 16 len 38 from "RASI1NRP2.Ilford2" 00:20:05: Vi1 PPP: Sent CHAP SENDAUTH Request to AAA 00:20:05: Vi1 PPP: Received SENDAUTH Response from AAA = FAIL 00:20:05: Vi1 CHAP: Unable to authenticate for peer 00:20:05: Vi1 PPP: Authorization NOT required 00:20:07: Vi1 PPP: Authorization NOT required We are a UK based company connecting through BT, so some settings will be different from the US. When T1 is up we see Interface IP-Address OK? Method Status Protocol ATM0/0 unassigned YES NVRAM up up FastEthernet0/0 213.214.215.1 YES NVRAM up up Serial0/1 213.214.215.1 YES unset up up Virtual-Access1 unassigned YES unset up down Dialer0 unassigned YES NVRAM up up When T1 is own we see Interface IP-Address OK? Method Status Protocol ATM0/0 unassigned YES NVRAM up up FastEthernet0/0 213.214.215.1 YES NVRAM up up Serial0/1 213.214.215.1 YES unset up down Virtual-Access1 unassigned YES unset up down Dialer0 unassigned YES NVRAM up up SO Dialer is coming up OK, but does not get an IP from our ISP's radius server ? Config below. interface ATM0/0 no ip address no ip mroute-cache atm vc-per-vp 256 no atm ilmi-keepalive pvc 0/38 encapsulation aal5mux ppp dialer dialer pool-member 1 ! dsl operating-mode auto no fair-queue hold-queue 224 in ! interface FastEthernet0/0 description Handoff to Internal Network ip address 213.214.215.1 255.255.255.0 no keepalive duplex auto speed auto ! interface Serial0/1 ip unnumbered FastEthernet0/0 no ip route-cache no ip mroute-cache no fair-queue ! interface Dialer0 no ip address ip nat outside encapsulation ppp dialer pool 1 dialer-group 1 no cdp enable ppp pap sent-username [email][/email] password 0 password ! ip nat inside source list 1 interface Dialer0 overload ip classless ip route 0.0.0.0 0.0.0.0 Serial0/1 ip route 0.0.0.0 0.0.0.0 Dialer0 230 no ip http server ip pim bidir-enable dialer-list 1 protocol ip permit We do not see any authentication attempts on the radius server at all ? Any help appreciated. Gary