An integrated Multiplexer (MUX) and Demultiplexer (DMUX) system designed for high-speed data communication in potential localization applications is presented. Our proposed system integrates a 2:1 MUX and 1:2 DMUX on a single chip, leveraging SiGe-BiCMOS technology to achieve data rates exceeding 200 Gb/s. This integrated approach aims to optimize signal transmission efficiency and system integration for future optical communication networks. The paper concludes with plans for fabrication, measurement, and integration into practical communication systems, marking a significant stride towards realizing high-speed communication solutions.