Some functions can be configured on an optical interface only after the interface connects to a transmission medium (such as an optical module or copper module). When you plan to replace a configured optical module with a different type of optical module, you must clear the configurations of the old module before you install the new module. For. Small Form-factor Pluggable modules (SFP module) are the workhorses of modern network connectivity, enabling flexible fiber optic or copper links between switches, routers, firewalls, and servers. Sometimes the installation and. Proper transport, storage, installation, assembly, commissioning, operation and maintenance are required to ensure that the products operate safely and without any problems. The information in the relevant documentation must be observed. Common types of optical modules include SFP, SFP+, SFP28, QSFP, QSFP28, etc.