The correct way is to first unlink the optical module and the optical cable, and then connect the optical module. Align the SFP module with the optical port and insert it horizontally, pressing firmly until the bottom of the module engages with the locking spring of the optical interface. Figure 1 SFP Optical Module Installation. 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. Whether you're upgrading bandwidth, replacing a faulty unit, or reconfiguring your topology, knowing. When using the SFP module, you need to follow the correct steps strictly. The wrong operation will reduce the service life of the modules. Although the. SFP, SFP+, SFP28, QSFP, and QSFP28 are hot-swappable modules.