3Com 3C16710 manual Positioning the OfficeConnect Hub, Hub Connections

16710.bk : CREYRNET.FRM Page 5 Tuesday, October 7, 1997 11:38 AM

In order to comply with the 10BASE-T standard, ports designed for workstation connections have been marked with the graphical symbol ‘x’. This denotes a crossover in the port’s internal wiring, for example 1x, 2x, 3x...

Hub Connections

If you have additional hubs you want to connect using 10BASE-2 (Coax), you need:

■One 10BASE-2 50 Ohm cable for each additional hub. The minimum cable length you can use is 0.5 meters (1.6 feet). The maximum segment length you can have is 185 meters (607 feet).

■One 10BASE-2 ‘Y’ piece for each hub. You can use ‘T’ pieces but ‘Y’ pieces provide adequate clearance of the other ports.

■Two 10BASE-2 50 Ohm terminators (end pieces).

If you have additional hubs you want to connect using 10BASE-T, you need:

■One ‘Straight-through’ 10BASE-T cable for each additional hub.

Positioning the OfficeConnect Hub 2-5

Positioning the OfficeConnect Hub

When installing your OfficeConnect hub, ensure:

■It is out of direct sunlight and away from sources of heat.

■Cabling is away from power lines and fluorescent lighting fixtures, and sources of electrical noise such as radios, transmitters and broadband amplifiers.

■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. We recommend you provide a minimum of 25.4 mm (1 in) clearance.