Hi AkekeSunday
In MMC 812. make sure MPs is set to on.
On your fire wall, you will need to open ports to the IP address of the phone system for this to work.
We Voip is a Sip extn
Open
UDP 5060
UDP 9000
UDP 30000 to 30031 ( All 32 Ports )
UDP 40000 to 40031 ( All 32 Ports )
UDP 45000 to 45015 (...
This may help.
The network switches need to support Multicasting
Generally only IP phones on the local LAN can use the Multicast feature.
IP Phones across a WAN network may still require an individual MGI resource.
Where the Routers that support the WAN are Multicast compliant,
the Multicast...
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