This read-write DisplayString specifies the preferred path for the connection, in the same Nodename{Trk} format as parConnRoute, with a null string meaning no preferred route is set. An administrator sets this to steer PAR's routing engine toward a specific desired path rather than whatever route it would otherwise compute as least-cost, for instance to keep a connection off a satellite hop. For example, pinning a delay-sensitive voice PVC's preferred route through a known low-latency terrestrial path helps ensure it isn't rerouted onto a higher-delay satellite trunk during network changes.