I watched DeepDive module 6 video #55 "Traditional MoH". What Mark said and show there was that if Phones is directly connected to Route/SwitchModule
"we dont have to have 'multicast-routing' configured as well as 'ip pim dense mode' in the receiving router IF the phones are local onto the router/switch" which in the video is SB having HWIC-4ESW.
I tried to simulate this scenario, moh is playing, i can see that it uses multicast in rtmt but even after issuing 'no multicast-routing' command in SB (call originated from HQ and HQ phone is the one that hold tha call), moh went down. What could be wrong?