When I enable Call Forward Unconditional, my cell phone rings. However, if I don't answer the call the missed call notification goes to my Desk Phone as well as a voicemail if one is left by the caller. Is there a way to route all calls to my cell phone without having them loop back to the desk phone if I don't pick up? I want to know if someone called and hear their voicemail if I am out of the office. My setup is five Obi1062's connected to an Asterisk server locally. I'd prefer to use the Obihai's built in Call Forwarding if possible versus the star keys I can use in Asterisk.