http://blog.voipdiy.com/2013/06/obihai-obi100-how-to-update-firmware.htmlChecking Firmware Version Using the IVR
This is a strait forward procedure:
Take the phone Off-Hook and dial three stars, followed by digits 0, 1, # (i.e.: ***01# ).
The OBi100 IVR will read back to you your currently installed firmware version number.
Updating Firmware Using the IVR
The IVR code " ***6 " will check the Obihai web site directly for the latest version of firmware available and compare that version against the version installed in your OBi100.
Take the phone Off-Hook and dial three stars, followed by the number 6 (i.e.: ***6 ).
Now, the IVR will respond as follows:
- "Please wait...", followed by one of the following possibilities:
1) "Software Update Not Available".
OR
2) "Software Update Available. Press 1 to update software".