3Com 3C17205 - SuperStack 3 Switch 4400 PWR Getting Started Manual

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3Com 3C17205 - SuperStack 3 Switch 4400 PWR Getting Started Manual Manual pdf 33 page image

The Power-up Sequence 33Table 7 Cables required to connect the Switch 4400 to other devices ifauto-negotiation is disabledCAUTION: If you want to install the Switch using a Category 5E orCategory 6 cable, 3Com recommends that you briefly connect the cableto 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 aUTP cable to an earth ground point, and the other end to a female RJ-45connector located, for example, on a Switch rack or patch panel. TheRJ-45 connector is now a grounded port.Choosing the CorrectCables(Switch 4400 FX)All of the ports on the front of the Switch 4400 FX are 100BASE-FXMT-RJ multi-mode ports. The MT-RJ port is a small form factor fiber-opticport with the transmit and receive fibers in the same cable. Unlike manyfiber-optic systems, only one MT-RJ cable is needed to connect twoMT-RJ ports together.To connect a front-panel port to another 100BASE-FX MT-RJ multi-modeport, or to a patch panel, a single MT-RJ multi-mode pinless jumper cableis required. Since standard MT-RJ cables are cross-over cables, noAuto-MDIX sensing is required. The maximum cable length is2 kilometers (1.24 miles).CAUTION: Do not connect pinned MT-RJ connectors into any port on theSwitch 4400 FX as this may damage the unit. The ports have locator pinsfitted and are designed for standard (pinless) connectors.To connect a front-panel port to a 100BASE-FX single mode port, or to aport that does not have an MT-RJ connector, an adaptor will be required.It is not possible to connect a front panel port to a 1000BASE-FX port.Cross-over Cable Straight-through CableSwitch to Switch(MDIX to MDIX) ✓ ✕Switch to Hub(MDIX to MDIX) ✓ ✕Switch to PC (NIC)(MDIX to MDI)✕ ✓DUA1720-3AAA06.book Page 33 Thursday, June 5, 2003 4:01 PM