3Com 3C16791C User Guide - Page 9

3C number Region 3C12VUS or 3C5VHEUS US 3C12VUK or 3C5VHEUK UK 3C12VME or 3C5VHEME ME 3C12VAA or 3C5VHEAA AA 3C12VSA SA 3C12VKR KR 3C12VRA RA United States United Kingdom Mainland Europe Australasia South Africa South Korea Argentina Only use the power adapter supplied with the Switch or a replacement OfficeConnect power adapter. Do not use any other power adapter. Port Status LED not lit for a port that has a TP cable connected. After connection, it may take several seconds for the Port Status LEDs to illuminate. The Port Status LED should turn, Green for each port that is connected. Please refer to 'About Your Switch' for a full description of the LEDs. If the Port Status LED is not lit after several seconds, ensure that the connected device is powered on, that the TP cable is not damaged and that it is correctly inserted at both ends. You may find that a TP cable works when connected to the Switch, but that it does not if disconnected from the Switch and connected to another device. This may be because the other device does not have the automatic MDI/MDIX feature. The Port Status LED is lit but the network performance of the switch is poor. The switch supports full-duplex autonegotiation. If the connected device does not support autonegotiation, ensure it is configured for half duplex operation only. 16 Support and Safety Information 17