Normally 3 leading digits (area code) out of 9 dialed digits are deleted when the call is directly routed to the desired office (sub route) where the call is terminated to a called party connected to that desired office. In the case that if the direct route (sub route) is busy or link fall down, the call is to be rerouted to a transit office as a second choice (sub route) with all 9 dialed digits sent to that second choice (sub route) transit office.
How we can perform sending all 9 dialed digits to the transit office of the second choice (sub route)?