To set up redirection from office to mobile phones, you need to pick up the phone and dial the code:

To forward all calls:

* 7 1 2 2 8 0 7 7 7 [ your number is in 8] #

For forwarding only when there is no response (15 seconds) or a busy number:

* 7 1 2 5 8 0 7 7 7 [ your number is in 8] #
After the beep, hang up the phone.
Example: *71228077789151234567#

To disable forwarding, pick up the phone and dial the code:
*7120