A method of transmitting visual data from a host computer to multiple displays across a computer network is disclosed. A sub-bit line SBL in a subarray 12 is connected via a first transistor PC1 to a power source voltage, and via a second transistor NC1 to a ground voltage. Another OSC processing unit acquires the SDH frame, containing wavelength information, from the switching unit and sets an OSC signal which is to be appended to the WDM signal to be transmitted, based on the wavelength information. The method further includes reducing the axial length of the string of casing to land a wellbore component in a subsea wellhead. The footing and vertical wall can be constructed monolithically utilizing this method. The device information is extracted from the human-readable file.