1. After connecting the cable, allow a few seconds for the Ethernet link to come up before treating it as a failure.
2. Try a known-good Ethernet cable and another switch port.
3. Check the switch for Energy Efficient Ethernet (EEE) or “green Ethernet” behaviour. Temporarily disabling that feature on the relevant port can help identify a compatibility issue.
4. Check the SB1000 network settings and confirm whether it received the expected address from DHCP.

If the link still does not appear, record the switch model, port configuration, SB1000 firmware version, and LED state before contacting support.