3Com 3C17709 Getting Started Manual

Also see for SWITCH 4050: Product guide Quick reference guide Datasheet Datasheet

Contents

3Com 3C17709 Getting Started Manual Manual pdf 27 page image

The Power-up Sequence 27If there is evidence of a problem, see “Solving Problems Indicated byLEDs” on page 52 for a list of suggested solutions.CAUTION: The Switch has no ON/OFF switch; the only method ofconnecting or disconnecting mains power is by connecting ordisconnecting the power cord.Choosing the Correct10/100/1000 CablesThe 10/100/1000 ports on the front of the Switch 4050 and 4060 areAuto-MDIX, that is they have a cross-over capability. These ports canautomatically detect whether to operate in MDI or MDIX mode. Thereforeyou can make a connection to one of the ports with a straight-through(MDI) or a cross-over cable (MDIX).The Auto-MDIX feature only operates when auto-negotiation is enabled.If auto-negotiation is disabled, all the Switch ports are configured asMDIX (cross-over). If you want to make a connection to another MDIXport, you need a cross-over cable. Many ports on workstations andservers are configured as MDI (straight-through). If you want to make aconnection to an MDI port, you need to use a standard straight-throughcable. See Table 7.3Com recommends that you use at least Category 5 twisted pair cable —the maximum segment length for this type of cable is 100 m (328 ft).Table 7 Cables required to connect the Switch 4050 and 4060 to other devicesif auto-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-45Cross-over Cable Straight-through CableSwitch to Switch(MDIX to MDIX) ✓ ✕Switch to Hub(MDIX to MDIX) ✓ ✕Switch to PC (NIC)(MDIX to MDI) ✕ ✓