Hello
I use the following config with the 836er Cisco Routers.
I think it's more an generic problem then a product specific one... but:
interface BRI0 no ip address encapsulation ppp no ip route-cache no ip mroute-cache load-interval 30 dialer pool-member 6 isdn switch-type basic-net3 isdn tei-negotiation first-call no cdp enable ppp multilink
Regards Erich