A catalytic method is provided for a ring-opening cross-metathesis reaction between a cycloolefinic substrate and a second olefinic reactant, wherein the catalyst used is a transition metal alkylidene complex substituted with an N-heterocyclic carbene ligand. The sensors have a change in detectable property, such as color, which occurs when said sensors are exposed to a particular stimulus such as an object or event to be detected. The replicated signals are provided to the additional components at substantially the same time as the control signal is provided to the first component. The communication server selectively couples a subscriber system, responsive to a request for service, to either a first modem pool or a second modem pool based on the availability guarantee value associated with the subscriber system.