
Chapter 2 Cabling the CSS
Cabling the CSS 11503 and CSS 11506 Modules
Table 2-3 describes the FEM LEDs and their indications.
Table
LED Name | Color | State | Indicates |
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Link | Green | Off | No link established |
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| On | Link established but no activity |
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| Blinking | Link established with transmit or receive |
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| activity |
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Duplex | Green | Off | Port is operating at half duplex |
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| On | Port is operating at full duplex |
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Note If all of the FEM Link and Duplex LEDs blink synchronously, the module has failed.
Gigabit Ethernet Module Connectors and LEDs
The Gigabit Ethernet Module (GEM), model
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Warning Because invisible radiation may be emitted from the aperture of the port when no fiber cable is connected, avoid exposure to radiation and do not stare into open apertures.
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