Cisco 877 with Demon Broadband - Help

I am trying toget a Cisco 877 router working on my Demon B'band connection.
The Broadband works when I use a BT Voyager 220V so I know the service
itself is OK. The configuration on the router works quite happily when
attached to a standard BT B'band connection at another site.

The ATM0 link comes up and then drops a few moments later. The CD led lights
up followed by a limited amount of activity on both RXD and TXD leds and
then the whole cycle appears to repeat itself,

I am not au fait with debugging as ar as the adsl link goes.

Can anyone help/advise.

Many Thanks,


Config is shown below


version 12.4

no service pad

service timestamps debug uptime

service timestamps log uptime

service password-encryption

!

hostname nnnnnnnn

!

boot-start-marker

boot-end-marker

!

logging buffered 40960 debugging

enable password password

!

no aaa new-model

!

resource policy

!

ip subnet-zero

ip cef

!

interface ATM0

no ip address

no atm ilmi-keepalive

pvc 0/38

encapsulation aal5mux ppp dialer

dialer pool-member 1

!

dsl operating-mode auto

!

interface FastEthernet0

!

interface FastEthernet1

!

interface FastEthernet2

!

interface FastEthernet3

!

interface Vlan1

description #Connection to Home LAN#

ip address 192.168.n.n 255.255.255.0

ip nat inside

ip virtual-reassembly

ip tcp adjust-mss 1452

!

interface Dialer1

ip address negotiated

ip nat outside

ip virtual-reassembly

encapsulation ppp

dialer pool 1

ppp chap hostname nnnnnnn@xxxxxxxxxxxxxxxxxxxxx

ppp chap password nnnnnnnn

!

ip classless

ip route 0.0.0.0 0.0.0.0 Dialer1

!

no ip http server

no ip http secure-server

ip nat inside source list 1 interface Dialer1 overload

!

access-list 1 permit 192.168.0.0 0.0.0.255

!

control-plane

!

line con 0

no modem enable

line aux 0

line vty 0

password nnnnnnn

login

line vty 1 4

login

!

scheduler max-task-time 5000

end




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