Carl Prime

Hi guys I have a Varitas R8 and am attempting to wire an autodailer to the system ive wired it as v+ and v- to the communicator output on the main panel and linked v+ to contact 3 on the dailer but when i test to see if it calls out on activation I can't seem to get it to work. But when you set the system it calls out. Also I didn't know if it was best to connect the 3 to the bell output from the main panel as it does say R8 is a v- switch. Helllllp its doing my nut in. How should it be wired?