Poly VVX 230 outgoing but no incoming calls

Hello,

I am using a fusionPBX and have Poly phones both VVX 500 and VVX 230

The VVX 500 work fine.  The VVX 230 will place outgoing calls, are registered but will not accept incoming.  Looking at the logs there will be an Invite a Trying and then a 436 Busy.

Attached is a copy of the config template that was used for autoprovision.  All phone are on the same network.

Any help/suggestions would be appreciated.

Thanks,
David