Any hints to get SIP calls into a meeting?

I have looked at a few articles about getting inbound calls working but only having partial success. Meetings connect to my Asterisk server and calls show up as incoming call and show caller ID but meetings never answers the call. Seeing this in the logs. Not sure if this indicates an incorrect or missing Codec or something else:

ERROR net.java.sip.communicator.impl.protocol.jabber.CallPeerMediaHandlerJabberImpl - Offer contained no media formats or no valid media descriptions.

Anyway, if anyone has inbound calls working and would like to share some hints I would really appreciate it.

Thanks,

John K