The service allows you, via compatible CPE, to configure the BT network so that it can forward incoming calls to another number. You should check with your equipment suppliers and ensure that your equipment would support Customer Controlled Call Forwarding before the service is provided.
There are various options available:
Call Forwarding Unconditional
All incoming calls (voice and data) are immediately forwarded to any telephone number capable of receiving the calls.
Call Forwarding on No Reply
The service automatically forwards all incoming calls (voice and data) to the programmed number if you do not answer the call within approximately 20 seconds.
Call Forwarding on Busy
The service automatically forwards all incoming calls (voice and data) to the programmed number if you are already engaged. The forwarding takes place when either all channels are in use or when an individual called number is busy (CPE supplies a 'User Determined Busy' signal to the network). | 
