User manual 3COM 3COM_SUPERSTACK II ENTRY HUB_24 PORT TP (3C16441)

[. . . ] 1 *Category 5 screened cables must be used to ensure compliance with this standard. The use of unscreened cables complies with the Class A requirements. 5lb) free standing, or 19" rack or wall mounted using kit supplied Environmental Operating Temperature Humidity 0-50 °C (32-122 °F) 0-90% (non-condensing) DUA1644-0AAA01 1 SAFETY INFORMATION Please read the following safety information carefully before installing the Entry Hub. WARNING: Installation and removal of the unit must be carried out by qualified personnel only. [. . . ] If it is not lit, and: None of the ports work There is a problem with the fuse within the power cord’s plug. The Transceiver Module The internal fixed fuse for the power port does not work, but the supply to the Transceiver Module port has twisted pair ports work blown.
CAUTION: When installing the Entry Hub in a stack of different size units, the Entry Hub must be installed below the narrower units. When deciding where to position the Entry Hub ensure: s s It is accessible and cables can be connected easily. Cabling is away from: s Rear Panel Connections 8 Power Supply s s sources of electrical noise such as radios, transmitters and broadband amplifiers. power lines and fluorescent lighting fixtures. S Water or moisture cannot enter the case of the unit. Air flow around the unit and through the vents in the side of the case is not restricted (3Com recommend that you provide a minimum of 25mm (1 inch) clearance). Never stack units more than six high if free standing, and ensure that cables are supported so that they do not cause the stack to fall over. Do not place objects on top of any unit or stack. Do not obstruct any vents at the sides of the case. The Entry Hub automatically adjusts to the supply voltage. Only use the power cord that is supplied with the Entry Hub. 9 Socket for Redundant Power System s Only connect a 3Com SuperStack II Advanced RPS (Redundant Power System) to this socket. For details, follow the installation instructions in the guide accompanying the Redundant Power System. To prolong the operational life of your units: 10 Transceiver Module Slot A variety of 3Com plug-in Transceiver Modules or the Bridge MicroModule can be installed in the Entry Hub (see “Products and Bulletin Boards”). transceiver Modules provide direct network connections to different media. S s Ensure that SQE test is disabled on the Transceiver Module that you are using. To install a Transceiver Module, refer to the guide that accompanies it. If you subsequently remove the Transceiver Module, you must replace the blanking plate to aid the circulation of cooling air and prevent the entry of dust and debris.
Rack or Wall Mounting The Entry Hub can be mounted in a 19 inch equipment rack, or wall-mounted using the Mounting Kit. see “Mounting Kit Instructions”. [. . . ] These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference to radio communications, in which case the user will be required to correct the interference at their own expense. Information To The User If this equipment does cause interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: s s s s If necessary, the user should consult the dealer or an experienced radio/television technician for additional suggestions. [. . . ]