I have an Allworx VOIP PBX system located at our central site. It uses multicast to allow a phone to page a group of phones. This works correctly on the local network. We have multiple remote sites with phones connecting back to the PBX. The remote sites are using EX2200 switches. The switch is connected to the central site with a 100mbps layer 2 Metro E line. The central site uses a Fortigate 200E. Each site has its own VOIP VLAN. Multicast traffic is enabled on the Fortigate between the appropriate VLANs. All phone functions work except for paging groups which use multicast. It seems like the problem is in the EX2200 configuration.
A trunked port carrying multiple VLANS is connected to the MetroE line. The Phones are on their own trunked ports. I need to allow for the multicast traffic to pass back and forth between the phones and the PBX. So, port 47 is the MetroE and the phones are on several ports all belonging to the same VLAN.
After a good amount of digging, I think I need help to go further.