Intercom ringer

Ok, I thought this was going to be easy and wouldn't have to ask for help. But I can't seem to get this to work...

When I intercom our Polycom phones, *80extension, then the phone will ring, then beep, then open the intercom channel. I want to erase the ring, and just have the beep, then intercom channel. I've made a number of changes to our sip.cfg, but it doesn't seem to effect the intercom ring/beep. I'm assuming that you have to edit the portion that I have below but maybe I'm wrong....

THANKS EVERYONE!