NEC SV8100 page no voice

[Blake C]

I have an SV8100 and am setting up internal paging groups. I have the function key and page group setup, but when I page, it opens and tones the extensions, but no voice comes through. I have checked the mic as well as using the handset. I also created a special class of service and enabled everything to try. Please help

Thank You

 

[CoralTech]

Are the extensions in the right group? Are these digital or IP?

 

[Blake C]

They are IP and all in the same group. I can hear the beeps for the group call just no voice.
I the second is a mix of digital and IP. Both are the same.

 

[CoralTech]

Look at your setting for multicast vs unicast on your IP phones. Layer 2 switches can block that traffic.

 

[Blake C]

That was it! Thank you so much. I had to change my IP phones to Unicast, so my switches wouldn't filter.