3Com 3C16702A manuale d’uso

OfficeConnect ® Ethernet Hub 16C (3C16702A) User Guide[...]

3Com Corporati on ■ 5400 Bayfr ont Plaza ■ Santa Clara, California ■ 95052-8145 Copyrig ht © 2002, 3Com T echnologi es. All rights reserve d. No part of this doc umenta tion ma y be reproduced in any form or by any mean s or used to make any derivati ve work (such a s translation , transf ormati on, or adapta tion) without written permissi o[...]

3 Intr oducti on 5 Crea ting Y our Networ k 6 Ethernet Hub 16C—Front 6 Ethernet Hub 16C—Rear 7 Be fo re Y ou Sta rt 8 Pro duct Regist rati on 8 Wo rksta tion Conne ctions 8 Hub Connect ions 8 Stack in g the Units toget her 9 The Ru bber Feet 9 The Stac king Cli p 9 Posi tioni ng Y our Offi ceCo nnect Hub 10 Secur ing t he Off iceConne ct Hub 10[...]

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5 I NTRODUCTI ON Welcome to the worl d of networking with 3Com ® . In the modern business env ir onment, communica tion and shar ing information i s crucia l. Computer networks hav e pr oved to be one of the fast est modes of communicati on but, until r ecently , only lar ge businesse s could af for d the ne tworking advantage. T he O f ficeConnec[...]

6 C RE A T I N G Y OU R N ET WOR K Ether net Hub 16C—Front Alert LED orange Alerts you to excessive network use or an isolated (partitioned) 10BASE-T port. Power LED green Indicates that the power supply to the hub is present. Network Utilization LEDs green/yellow/orange Indicates how much your network is being used. Collision LED yellow Flashes [...]

7 Ether net Hub 16C—R ear[...]

8 Before Y ou Start Y our Offic eConnect hub comes with: ■ One power adapter for us e with t he Of ficeC onnect hub. ■ Four rubber feet. ■ A st acki ng clip. ■ One Support and Safety Information She e t ■ One W arrant y Fl yer The extr a par ts mentioned i n the next s ection ar e not supplied with the hub. Pr oduc t Reg is tr at io n Y o[...]

9 If you want t o connect additional hub s using 10BASE-T , you need: ■ One ‘Straight-through’ 10BASE-T cable for each additiona l hub. St acki ng the Un it s toget h er The Ru bber Feet The four self-adhesi ve rubber feet pr event your hub f r om moving ar ound on your desk. S tick the feet t o the marked ar eas at e ach cor ner of t he unde[...]

10 Positio ning Y ou r OfficeConn ect Hu b When install i ng your OfficeConnec t hub, ensur e: ■ It i s out of dir ect sunlight a nd away fr om sourc es of heat. ■ Cabling is away f r om power lines , fluor escent lighting fixtur es, and sour ces of electri cal noise s uch as rad ios, transmit ters and br oadband amplifiers . ■ W ater or mois[...]

11 Conne cting Workstat ions and Othe r Equip ment to Y our Hub WARNIN G: Pleas e read the ‘Impor tant S afet y Inform ati on’ sh eet before yo u start. WARNHINWEIS: Bitte lesen Sie den A bschnitt ‘Wichtige Sicherhei ts informatione n’ sorgfälti g durch, bevor Sie das Gerät einschal ten. A VERTISSEMENT : V euillez lire attentiv ement la s[...]

12 Connecting Hubs Us ing 10BASE-2 ( Coaxial ) When using 10BASE- 2 ( Co ax ial ) c able, it is important that bot h ends of the segment are properly termi nated w ith 50 Ohm term inat ors (end pie ces ). Only use 50 O hm 10BASE- 2 ( Coa xia l ) cables and us e a ‘Y’ piece f or each hub. Y ou can use ‘T’ pieces but ‘Y’ pieces prov ide o[...]

13 Conn ect in g Hu bs Us ing 1 0 BASE- T Y ou ca n connect hubs togeth er with 10BASE-T in a number of ways, but for si mplicity we r ec ommend the f ollowing method: 1 Starti ng fr om the b ottom, connect port 16 of t he lower hub to port 15 of t he hub immediately above. Repeat for each hub (a s shown in F igure 4). 2 Set a ll Uplink /Normal s w[...]

14 P RO B L E M S OLVI NG The Of fic eConnect h ub has be en desig ned to aid you when detect ing and solving possible proble ms with your network. These proble ms are rar ely se rious; the ca use is usually a disconnected or damaged c able, or inc orrec t configurat ion. If this section does not solve your pr oblem, contac t your supplier f or i n[...]

15 Refer to Figur e 5 below to compar e the wiri ng of a strai ght-thr ough and a cr ossover cable. Fig ure 5 St rai ght- thr ough Ca ble/Cr ossover Cable 1 Normal port Pin Pin Uplink port Rx+ Rx- Tx+ Tx- Tx+ Tx- Rx+ Rx- 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 Normal port Pin Pin Normal port Rx+ Rx- Tx+ Tx- Rx+ Rx- Tx+ Tx- 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8[...]

16 N ETWORKI NG T ERMINO LO GY A Netw ork is a collec tion of works tations (f or example, IBM-compat ible PCs) and other equipme nt (for example, printers ), connected for the purpose of exc hanging information or sharing resour ces. Networks vary in size, some ar e within a si ngle r oom, others span cont inents. A Local Ar ea Netw ork (L AN) is [...]

17 D IMEN SION S AND S TAND ARDS Dim ensions a nd Opera ting Conditions Standa r ds Functiona l: ISO 8802/3 I EEE 802.3 Safet y: UL 1950 EN 60950 CSA 22.2 #950 IEC 60950 EMC: EN 55022 Class B † EN 55024 FCC Part 15 Class B † * I CES-003 Cl ass B VCCI Class B † CNS 13438 Clas s A Envir onmental: EN 60068 (IEC 68) V arious parts †Categor y 3 [...]

18 E NVIRONMENT AL S TAT EMENT S It i s the polic y of 3Com Corpor ation to be envir onmentally-friendly in al l operation s. T o uphold our po l ic y , we ar e c om m it t ed t o: ■ Establis hing envir onmental perf ormance sta ndards that comply wit h nationa l legisl ation and regu lations. ■ Conserving e nergy , materials and natural res ou[...]

19 R EGULA TORY N OTICES FCC S TAT EMENT This equip ment ha s b een te sted an d found to c omply wit h the limits for a C lass B digita l device , pursu ant to Par t 15 o f the FCC Rules , and the C anadian Departme nt of Commun icati ons Equipme nt Sta ndard s entit led, “Digi tal Appara tus,” I CES-003. T hese lim its are de signed to provid[...]

20 W all mounting screw hole guide 142m m (5.6in .)[...]

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Part No. DUA 16 70-2AA A04 Publ ished Apr il 20 02[...]