When your extension is linked to your cell phone and you answer an office redirected call on your cell phone, you may use the following quick reference card to know the available options for accepting, rejecting, parking or transferring calls back from your cell phone.   For example, if you answer a call on your cell phone and then want to transfer it back to  a colleague at the office at extension 201, then while on the phone you would press ##2201 and that would transfer the call off your cell phone and back to the office and to extension 201. 

To change your cell phone preferences on the PBX,  see the  steps on Linking Your Cell Phone