This attribute is the cost metric for the trunk. This value is assigned
by the network administration to represent the network cost of using
this trunk. It can be related to distance, speed, dollars, or any other
factor that could be taken into consideration. If the
trunkAttributeToMinimize is set to trunkCost, PORS finds a route
with the smallest sum of the PathAdmin trunkCost attribute over all
trunks. The trunk cost can be increased or decreased without
disrupting the service to the link. If it is increased and the PORS
optimization feature is enabled calls will move off this link to lower
cost links when possible. If the cost is decreased new calls will be
attracted to this link.