Are you using GV or something else?
The star codes initially confused me. So, a few points:
- Under "Star Code Features" in the Admin Guide, it says "OBi Star Code Enabled Features Apply to All Voice Services."
- Then later under Google Voiceâ„¢ Service it says "Starting with firmware release 1.2, the following features are supported: ... Voice Service Features of the OBi Device."
I take point #1 to mean if your SIP provider both enables and supports the feature, then the Obi star codes will work. For example *81 Block Caller ID, and *56 Enable Call Waiting, these two features might have to be enabled via some control panel or dashboard (CellCentric) in your SIP account.
For GV, after a few months of use
I'm not completely certain which star codes are supported. I do know some that are not (*67/68, *81/82).
And, some of these are not dependent on the SIP provided but instead are implemented by the Obi device. Examples are *78/79, *66/86, *96, *98 and as I understand it all the Call Forward features (*60/61, *62/63, *72/73).