3Com 1000BASE-SX quick start You feel a slight resistance as the connectors engage

2-Port 1000BASE-SX and 2-Port 1000BASE-LX Gigabit Ethernet Interface Modules Quick Start Guide 13

7To engage the module connectors and the chassis backplane connectors, apply forward pressure to the module front panel.

You feel a slight resistance as the connectors engage.

CAUTION: If the resistance is too great, the module connectors and the backplane connectors may not be aligned. Forcing the module into place can damage the module connectors and backplane connectors. If necessary, remove and reinsert the module, ensuring that the connectors are properly aligned. Do not tighten the spring-loaded screws to seat the module.

If modules are already installed to the left of this module in a 16-slot chassis or installed beneath this module in a 7-slot chassis, you may need to apply sideways or downward pressure on that adjacent module to have your module line up correctly in its slot. Applying this pressure compresses the thin strip of rubber-like material (which exists for electromagnetic interference purposes) at the edge of the front panel of the adjacent module.

8Ensure that the module remains fully seated in the backplane connectors while you close the ejector handles.

Use one hand to hold the module in place, and use your other hand to close one ejector handle at a time until the handles are parallel with the front panel.

9To secure the module front panel to the chassis, tighten the spring-loaded screws to a torque specification of 3–5 inch-pounds.

CAUTION: To ensure adequate cooling air flow and continued product safety agency compliance, install blank faceplates over all empty slots.