3Com 100 TX manual Interface Module, Cabling, Requirements

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4-2 CHAPTER 4: CABLING

Transceiver	The two transceiver interface modules provide downlink connectivity to
Interface Module	another hub or to a bridge, router, or switch. For transceiver interface
Cabling	module connections, the hub supports 100BASE-T functionality using the
Requirements	following media speciﬁcations:

■100BASE-TX: two pairs of Category 5 twisted-pair UTP wire

■100BASE-FX: two-strand ﬁber-optic cabling (62.5/125 ∝ multimode cable)

Topology Rules The key 100BASE-T topology rules are illustrated in this section.

Hub to Connected The maximum UTP cable length between the hub and connected Workstations workstations is 100 meters. (See Figure 4-1.)

FMS 100 LinkBuilder-TX Hub 100BASE

3C250

-TX/Ι

UNIT

					STATUS
											11	12	13
12x							7	8	9	10	11	12
12x				4	5	6	7	8	9
11x	1	2	3	4	5	6

10x 9x

100BT	8x
	7x

6x

5x

4x

3x

2x

1x

1 . . . . . . .8

Straight-through UTP cable (100 meters maximum)

Figure 4-1 Connecting the Hub to a Workstation

Image 40

Contents FMS 100-TX HUB 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Glossary Cispr a Compliance Page Figures Tables Port LEDs Hub Operation LEDsHow to Use This About this GuideIntroduction GuideConventions General IntroductionDescription Front Panel of LinkBuilder FMS 100-TX Hub Only one Management Unit can be attached to each stack Harming the network Unpacking InstallingHub Positioning Attaching a Bracket for Rack Mounting Installing a Hub Stack in a Rack Transceiver InstallingInterface Modules 100BASE-TX Power System UsingRedundant Connecting the Redundant Power System to Four Hubs Opening the Fuse-holder in the AC Receptacle Assembly Removing the Fuse Aking FMS 100-TX H UB ConnectionsTwisted-pair Cable Server RJ-45 Connector Pin Assignments Down expansion port UP expansion port Connecting a Hub Stack to a Management Unit Connecting Hubs to the Network Backbone Considerations ForMultisegmented NetworksLinkBuilder FMS Classiﬁcation RepeatersClass II Hubs LED FAN Fail Power-Up Disabled Option Switch EnabledPage Cabling Cabling Interface ModuleRequirements Connecting the Hub in a Network Span of 260.8 Meters Using an Internetworking Device to Extend the Network Span Specifications Page Services On-line TechnicalAccess by Isdn Your Network Support fromSupplier To ﬁnd your authorized service provider 3ComGlossary FMS Flexible Media Stack Com’s family of stackable hubs Glossary Glossary Index NumericsInstalling hub Desktop placement 2-5 positioning Index Page Limited Warranty FCC Class a Verification Statement Page Page Page Page Reader Comment Form Business Reply Mail