The number you have reached is not in service.
3 seconds sound clip from Darkwing Duck - Duck Blind (S1E8).
You can hear this line at 00:14:38.094 in the DVD version of the TV Series.
Quote context
[...]
- Wait! He's using his threat assessor on Megavolt's suit.
- But I thought you were blind. How did you do that?
- The number you have reached is not in service.
- Bad break, Darkwing, but if you can't stand the heat, tough!
- Launchpad, get the kids out to the Thunder... quack.
- Hey, if it's got a wing, we've got a prayer. Contact.
[...]