DDR as backup. No idea how/when it should work

[webstd.design]

I'm checking some config with backup analogue line configured as DDR

Sh dialer shows dial string and status idle.

How can I check when this dialer trigger from idel to active?

There is no other interface looking external, but there is HSRP configred between other router which use FR to the same connection as primary.

I've checked all the config and no glue when dialer should call dial string

Please throw me some light on this

[vmiller]

take a look at any routes configured.Or Post both conifigs here after removing sensitive information.