There is provided a method for connecting an insulator coated wire with a conductive member while keeping the electrical resistance low and enough joint strength at the joint section therebetween without removing the coating film of the insulator coated wire beforehand. The gateway device is configured to designate the first data port as a primary data port and the second data port as a secondary data port. A medical device system suitable for use in the method. Pixel brightness values are calculated using the duty cycles of the light-emitting blocks and brightness profile data in accordance with light-emitting regions of the light guide plate from which the light is emitted when a representative light-emitting block of the light-emitting blocks is driven. The laser may comprise a phase control section, gain section, a sampled grating DBR giving a comb-line spectrum and two tunable, chirped DBRs for broadband frequency training and a coupling section.