Document Here (http://www.obihai.com/docs/OBiFeatureStarCodes.pdf)
OBi Star Code Enabled Features Apply to All Voice Services
*07 Redial
*69 Call Return
*81 Block Caller ID (Persistent Mode)
*82 Unblock Caller ID (Persistent Mode)
*67 Block Caller ID (One Time)
*68 Unblock Caller ID (One Time)
*72 Call Forward All (Enter Number + #)
*73 Disable Call Forward All
*60 Call Forward on Busy (Enter Number + #)
*61 Disable Call Forward in Busy
*62 Call Forward on No Answer (Enter Number + #)
*63 Disable Call Forward No Answer
*77 Block Anonymous Calls
*87 Unblock Anonymous Calls
*56 Enable Call Waiting
*57 Disable Call Waiting
*78 Do Not Disturb - Turn On
*79 Do Not Disturb - Disable
*05 Repeat Dial
*06 Disable Repeat Dial
*74 Speed Dial Set-Up (Enter SD No. [1-99] then Tel No. + #) +++
*75 Speed Dial Read-Back (Enter SD No.)
*4711 Use G711 For the Next Call (Enter *4711 then Tel No.)
*4729 Use G.729 For the Next Call (Enter *4729 then Tel No.)
*03 Called OBi will Loop-back Media
*04 Called OBi will Loop-back RTP
+++ Be careful with the Speed Dial Set-Up as this will conflict with the Speed Dials set-up on the OBiTALK portal. The Speed Dials that are set-up on the OBiTALK portal will always overwrite anything set-up via the phone connected to the OBi.