KTI Networks KS-2240 - Manual (Page 18)

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The Gigabit Ethernet module supports auto-negotiation although it
only operates on 1000M full-duplex mode. This function makes sure
the system operates with maximum performance when it is connected
to an auto-negotiation capable Gigabit Ethernet device.
Duplex Mode Full duplex
Fiber cable MM 50/125mm, 62.5/125mm recommended
Module Installation
1. Turn off the power to the switch unit.
2. Open the cover of Gigabit slot.
3. Insert the module into slot until it is seated properly.
4. Screw the module onto the chassis securely.