An apparatus and method for modulating a phase of optical beam independent of polarization. A control node such as an EPC node in an SAELTE PS-only network is modified to mimic the messaging functionality of a Serving GPRS Service Node. The mouthpiece includes a liquid storage portion and a capillary wick having a first end and a second end. The beamsplitter splits a beam of collimated broadband light into a reference beam and a measurement beam that are directed by the optical system to make multiple roundtrip passes from the optical system to the respective corner cubes and back. The first forearm has a first end effector depending therefrom. The user interface presents the user with a number of user-selectable settings that cause an adjustment in the position of the adjustable bed and at least one of the electronic appliances.