Manage the call diversion settings for individual or all numbers associated to this VoIP account. Please note that it is not possible to forward calls international, premium or internal extension numbers.
First log into your control panel (you can use your mobile phone/ipad for this).
Select Telecoms -> VoIP -> select the Wrench (on the right) beside the relevant account.
Enter the number you wish the divert to go to and enable it.
Keep Original Caller Details should also send you the callers details to your mobile phone.