setting up ISDN as backup to serial connection

[ash786]

We have setup a cisco router at a remote location with an ethernet interface and a serial interface which connects to our LAN via a kilostream connections. We have just installed ISDN at the remote site and would like to configure the CISCO router to dial the ISDN as backup to the serial connection. Unfortunately I have never setup ISDN on CISCO and would appreciate some pointers

Thank in advance

 

[Saeed42]

interface SerialXX/XX
backup delay X XX
backup interface BRI0/0
ip address XXX.XXX.XXX.XXX XXX.XXX.XXX.XXX.
encapsulation frame-relay IETF
no ip mroute-cache
frame-relay interface-dlci XXX
frame-relay qos-autosense
!
interface BRI0/0
no ip address
encapsulation ppp
dialer rotary-group XX
dialer-group XX
no fair-queue
no cdp enable
!
!
interface Dialer0
ip unnumbered SerialXX/XX
encapsulation ppp
dialer in-band
dialer idle-timeout XXXX [ You can use the persistent command so the line stays online]
dialer string 12334455
dialer load-threshold XX outbound
dialer-group XX
ppp authentication pap callin
ppp pap sent-username XXXXXXX password XXXXXXX
ppp multilink

ip route 0.0.0.0 0.0.0.0 sxx/xx 241
ip route 0.0.0.0 0.0.0.0 Dialer0 254

Hope that helps