On the Brocade G720 Switch, you find 48 LEDs (green/amber) for the first 48 SFP+ ports and 8 tri-color LEDs (green/amber/white) for the last 8 SFP+ ports 48, 50, 52, 54, 56, 58, 60, and 62. The tri-color LEDs pulse once in white before indicating the FC. System activity and status can be determined through the activity of the LEDs on the switch. Insertion of non-compatible and/or third-party SFPs can. Those triangles between the ports light up when link is established. Also, you can test if fortiswitch support your modules, just plug both SFP port to the switch. Wat I mean just make a loop, then you can see if port will light up, if both port will light up then SFP modules work whit that switch. Switches have LEDs for indicating power status, port status,link status, error indication, troubleshooting and performance monitoring. The LED colors for the switch and their corresponding status indications are as follows ; To Select or change a mode, press the mode button until the desired mode. Before you blame the switch or replace the cable, you need to look at the invisible data: the light levels. For network engineers working with fiber optics (SFP, SFP+, QSFP), understanding TX (Transmit) and RX (Receive) signal strength is critical. It is the difference between a stable, high-speed. The Cisco Small Business Series Switches allow you to plug in a Small Form-factor Pluggable (SFP) transceiver in their optical modules to connect fiber optic cables.