Selecting an optical module requires consideration of transmission speed, environment, connector type, fiber type, transmission distance, wavelengths, transceiver type, MSA and IEEE compliance, and vendor support. Selecting the right optical transceiver module is vital to ensure optimal network performance. Its primary function is to achieve optoelectronic conversion by converting electrical signals into optical signals and vice versa. An. These small modules determine how your uplinks operate: the speed, the distance supported, and whether your Cisco or Huawei switch will even recognize the module at all.