I recall this was an issue on the Polycom settings but don’t remember exactly which. It may have had something to do with enabling direct sip dialing on the phone’s configuration. Sorry I can’t be more help - other than I’m about 90% sure it was something that changed with a Polycom config and that has to be addressed there.
Philippe Lindheimer - FreePBX Project Lead
http//freepbx.org - IRC #freepbx