3Com 3C17203 Getting Started Guide - Page 28
CAUTION, Cross-over Cable, Straight-through Cable
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28 CHAPTER 2: INSTALLING THE SWITCH Table 8 Cables required to connect the Switch 4400 to other devices if auto-negotiation is disabled Cross-over Cable Switch to Switch (MDIX to MDIX) ✓ Switch to Hub (MDIX to MDIX) ✓ Switch to PC (NIC) ✕ (MDIX to MDI) Straight-through Cable ✕ ✕ ✓ CAUTION: If you want to install the Switch using a Category 5E or Category 6 cable, 3Com recommends that you briefly connect the cable to a grounded port before connecting network equipment. If you do not, the cable's Electrostatic Discharge (ESD) may damage the Switch's port. You can create a grounded port by connecting all wires at one end of a UTP cable to an earth ground point, and the other end to a female RJ-45 connector located, for example, on a Switch rack or patch panel. The RJ-45 connector is now a grounded port.