A method includes configuring a human-capital-management master taxonomy and a HCM language library. In response to receiving a local number portability request at a service control point, the SCP accesses one or more databases to determine whether or not to apply custom call routing to a call directed to a called telecommunications number. The mirror is operable to reflect light at a first interaction area to yield a first passband for an optical channel, and to reflect light at a second interaction area to yield a second passband for the optical channel. Accordingly, the signals can be squared and summed to determined a temperature compensation signal.