SV8500- overhead paging using a trunk port, tdm phones work fine, and ip phones access ok, but audio doesn't cut through. Any thoughts? :shrug:

Seems like I have read somewhere that multicast packets need to be enabled in the switch/router or a bit set to allow the phone to use unicast.

Hmmm, thanks. It appears that the newer DT-300 style IP phones are the problem. The older style (ITR?) can page.