I dialer is a list of commands to execute when a specific event or request is made.
Generally it permits multiple actions to be assigned to a single physical interface.
For example, you can put most / all of the same commands on the physical interface, but that's the only course of action that the interface will execute.
With a dialer interface, you can define several actions to be done (one set of actions per dialer)that reference the same physical interface.
If "this" happens, use dialer1, if "that" happens, do dialer 2 ... and so on. IT increases the possibilities of things you can do on a single interface.
Good Luck
Scott
