1. Am I correct in assuming that I must apply for Intelligent call forwarding on the application form for each site?
You will need to fill in a form per PRI.
2. Are Calls going to be forwarded if on busy or no answer?
No calls are only forwarded on error.
3. On conditional ICF how will the exchange know when the line is down and when it is up?
The trigger on the system will go off, initiating the forwarding when there is a disaster.
For example: if cables are stolen the calls will automatical route without human intervention.
4. How will the customer activate this service on either side?
Regarding Conditional ICF activation of the service is done automatically in the case of a disaster.
Regarding Unconditional ICF, the request needs to come through from the customer on a company letterhead.