The following steps will allow you to set up Multicast Paging on both the sender and receiver on Snom D785 phones. This will enable you to speak to receivers.

Configure Paging Sender via Override

1. Log onto the Portal
2. Go to Inventory > Phone Hardware
3. Select the Pencil Icon to edit the device you would like to set up. 
4. Navigate to Advanced > Overrides and enter the following:
   NOTE: These overrides are for soft key context 3 and will replace the help button on the LCD screen

multicast_listen="on"
mc_address1="224.0.1.116:5001,volmax=1,name=main"
context_key3="keyevent F_ZONES"

5. Click Save and Resync

Configure Paging Sender via Web GUI

1. Obtain the IP address of the phone and log onto the Web GUI
2. Go to Function Keys > Context-Sensitive Keys
3. Select Type as Key Event, Number as Multicast Zones