A technique to perform virtualization of lanes within a common system interface link. In the pivoted-in position the support arm extends approximately parallel with the fastening surface and in the pivoted-in position extends perpendicularly with respect to the fastening surface. A trip hazard engaging mechanism automatically locates the saw blade’s position and angle relative to and above the upper slab to create appropriate transition surface between the upper and lower slabs as it cuts off the trip hazard. The Raman pump light may be used to make measurements on the spans of transmission fiber.