You can do overhead paging through an ATA, but you'll need more stuff hooked to it. All you can do to the ATA is make it ring. Connect the ATA to a device that answers the ring, then connects the audio through to the page in port/connection of you amplifier. Viking makes a RAD that handles this quite nicely.

You may also need to provide talk battery in the circuit. Viking or Val Com makes equipment for this.

Sometimes the thoughts in my head get so bored, they go for a stroll through my mouth. This is rarely a good thing.