Multicast/Intercom

[jolouis]

You have your addresing confused. It looks like you're trying to use the address of the SIP server for your multicast page. Instead, you need to use a proper multicast address.

Basically it has nothing to do with your server, it's the address that when you start a page the phone will send the audio packets to. In order for all phones on the network to hear it, you use a special multi-cast address which tells the network equipment (switches, etc) to forward that traffic to all devices who might be listening.

Go back to the Yealink documentation and follow the steps there for setting up multicast paging.