Setup Cisco 836 isdn backup interface when ATM interface is down

How can i setup a Cisco 836 adsl Router to activate ISDN backup interfacce when ATM interface is down ?
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You can use a floating static route (default route if connecting to your ISP).

ip route <atm interface or atm next-hop-router>
ip route <isdn interface or isdn next-hop-router> 10 <---administrative distance

Using a higher administrative distance than the default (0 - interface, 1 - next hop router address), the route will only be used if the primary route (ATM) is removed from the routing table, i.e. the interface is down.

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hendai67Author Commented:
Thanks for reply to my question.
Is there someone with a configuration example ?

My posted comment was the configuration example.  Two "ip route" statements, one with a higher administrative distance (10).
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