Why Combo Ports 25-28 on GS2220 Are Not Linking Up?

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Zyxel_HsiuTe Posts: 61 image  Zyxel Employee
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Q:

Why do the copper ports of Combo Ports 25–28 on the GS2220 not link up when a GBIC module is inserted but no fiber cable is connected?

A:

The GS2220-28 features combo ports (ports 25-28), which prioritize GBIC (fiber module) connections over copper (RJ45) interfaces. If a GBIC module is inserted in the port, the copper interface will not activate, even if it is not linked via fiber.