An optical waveguide type modulator with a decreased driving voltage and an improved return loss of a driving signal is provided which includes an optical waveguide having a Mach-Zehnder type optical waveguide portion and a signal electrode and a ground electrode modulating an optical wave guided in the optical waveguide. A board support portion 32 for supporting the control circuit board 18 in an erect state is provided in the housing 22. Specific embodiments provide users the capability to bring new resources on line, define pathways between resources and provide billing, payment and other accounting information based upon the configurations and connections established responsive to the user demands, for example. Both locking mechanisms can be unlocked simultaneously so as to allow the top portion to be retracted into the bottom portion within a cavity provided in the base. The pants garment can be formed primarily of two mirror image sections that are interconnected along the front and rear seams.