Holding the SFP module by its sides, insert the SFP module into the port on the switch. Whether you're upgrading bandwidth, replacing a faulty unit, or reconfiguring your topology, knowing. SFP (Small Form-factor Pluggable) transceiver modules are widely used for connecting network devices such as switches, routers, and servers. In. how to connect fiber cable to switchhow to connect fiber module to switch how to use sfp ports on switchtimestamp0:05 – Product 10:10 – Product 20:20 – Tip. Where needed, notes applying specifically to these switches are provided. The Catalyst 4948 switches have four ports that can be. You can add or remove SFP modules in your switch without powering off the system.