You can use the "dialer redial" command to control redialing to the same phone number; so if the first call attempt (via ISDN or analog) fails, you can try that same number/interface again. You can also put the different interfaces in a hunt group (a dialer interface), and use "dialer rotor best" so that the interface used for the last successful call will be used again.
Btw this command is introduce in 12.2(4)T, my current router do not support that command.
What about if Frame-Relay, ISDN, 1st Analog failed, 2dn Analog will make a dial to other phone number(other router).--- have 4 interface, 1 serial, a ISDN BRI, 1 2-AS (this is connected with 2 analog modem).
Thank YOu very much I'm very very appreciate with you opinio. I'm waiting for you feed back to help me again.
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