Hi Robert,
You may refer to the following link:
http://www.cisco.com/c/en/us/td/docs/routers/access/vg350/software/configuration/guide/vg350_scg/scgpvdm3_config.html
NoteTranscoding, LMR and Conferencing features are not supported on Cisco VG310 and Cisco VG320 Voice Gateways.
It does not mention that VG350's are not capable of DSPfarm.
I have seen it implemented in VG350s using SCCP to register to CUCM, but there is no official documentation at the moment that talks about VG350 dspfarm capabilities for the moment.