3Com 5108M-TP manuale d’uso

ONline Et her net 10BAS E-T Module User’ s Guide Doc u men t Number 17-0 0 1 4 1-3 Print ed March 1 995 Model Numb er: 5108M-TP 3Co m Corpo ration 118 T ur npike Road South borough , MA 0 1772- 1886 U.S.A. (5 0 8) 46 0- 8 90 0 F A X ( 5 0 8) 460-8 950 ®[...]

ii O Nline Ethern et 10BASE-T M odule User’s Guid e Federal Commun ication s Co m mission Notice Th i s equipment has bee n t este d and f o und to com ply with the limits for a Class A digital device, pursu ant to P art 15 of the FCC Rules. These limits are designed t o p r ovide re asonable protection against ha r m f ul in t e rf e r ence when[...]

ONli ne Ethern et 10BA SE-T Module U ser’s Gui d e iii XNS is a trade m a rk a nd Ethernet is a r egis t e r ed t r ademark of Xerox Corporat ion. 3ComFacts, Ask 3Com, CardFact s , NetFa cts, and CardBoard ar e service mar k s of 3Co m Corporation. 3Com, LANplex, Bou ndar yRouting, L anSca nner , L i nkBui lder , NETBuilder , NETBui lder II, P a [...]

iv O Nline Ethern et 10 BASE- T M odule U ser ’s Guide[...]

Contents ONline Ethernet 10BASE-T Mo dule U se r’s G uide v How to Use This Gu id e Audien ce . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii Structu r e o f This Gui de . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiv Docum ent Conv entio ns . . . . . . . . .[...]

vi ON line Ethernet 10BASE-T Mo dule U ser’s Guide Chapter 3 — In stalli ng a n d Op eratin g t he Mod u le Precautionary Proc edu res . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Unpackin g Procedu res . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Installation Proced ures . . . .[...]

ONlin e E t hern et 10BASE-T M odule User’s Guid e vii Fig ures Figure 1- 1 . 10BAS E -T Module Fac eplate and ONline System Co nc entrato r . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Figure 1-2. 10 BA S E-T Module and Dip Switc h Lo catio n s . . . . . . . . . . 1-5 Figure 2-1. Sam ple Conf iguratio n Dist ance Calc ulati on . . .[...]

viii ONline Ethernet 10BASE-T Module User’s Guide[...]

ONli ne Ethern et 10BA SE-T Module U ser’s Gui d e ix Ta bles Table 1-1. Interpretation of the 10BASE-T Modu le LEDs . . . . . . . . . . 1-4 Table 1-2. Dip Switch SW1 Settings and Interpret ations . . . . . . . . . . 1-6 Table 1-3. Dip Switch SW3 Settings for Switches 1 and 4 . . . . . . . . . 1-7 Table 1-4. Dip Swit ch SW3 Setting s an d Interpr[...]

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ONli ne Ethern et 10BA SE-T Module U ser’s Gui d e xi How to Use This G uide The ONli ne ™ Ethernet 10 BA SE-T Module User’ s Guide descr ibes the features , in dicat ors, a nd in stallation proced ure s fo r the ON line Eth ernet 10BA SE-T Module. Inform a tion o n trou bleshooting and diagno s tics is includ ed fo r verify ing o peration . [...]

xii ONline Ether net 10 BASE-T Mo dule U s e r’s Guide Structu re of This Gui de This guide co ntains the fol lowing chap ters: Chapt er 1 , Introducti on – Intr o duces the prin cipal featu r es of the O Nline Ethern et 1 0 B ASE-T Module and provides views and descripti ons of the fr o nt panel an d the dip swi tches on the m odule. Chapt er [...]

ON lin e Ethern et 10B ASE-T Mod ule User’s G uide xii i Docu ment C onventi ons The follow ing doc u m ent con vention s are us e d in this manual: Con v entio n Indic ates Exam ple Couri er t ext User input In th e Agen t Infor mation F orm, enter MI S i n the New Contac t field. System ou tput After pressing the Ap ply button, the system disp [...]

xiv ONline Eth e r net 10 BASE-T Modu le User’s Guide Related Doc uments This section provi des in formation on suppo rtin g d ocumen tation , inclu ding: ❑ 3Com Doc ument s ❑ Reference D ocuments Note: A Note . The inform at ion i s impo rtant Note: Use STP lobe cables f or your system . Caution: A Caution. A condi tion m ay dama ge software[...]

ONlin e E t hern et 10BASE-T M odule User’s Guid e xv 3Com D ocumen ts The follow ing doc u m ents provid e ad dition al info rmation on 3Com products: 17-Sl ot ONlin e Syste m Conce ntra tor Installa tion a nd Opera tion Guid e – Explains how to in stall, oper ate, and manage th e 3Com O Nli ne 17-Slot System C o ncentrato r (Models 5017C -LS [...]

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Introd uction 1 - 1 1 Introduction This chapter d escribe s the featu r es, in dicators , and di p switch sett ings on the O Nline™ Eth ernet 10BASE-T Modul e. The ONl ine Ethe rnet 10BASE-T M odule The ONline™ Eth er net 10BASE-T Module is an eight-port IEEE 802 .3 r epeater module that com plies with the 10BASE-T standard. This module works w[...]

1 - 2 ONl ine Ethernet 10 BASE-T Mod ule User’s G ui de twisted pair connectio ns while po rts 3, 4 , 5, and 7 are shielded t wisted pair connec tions . In additio n to comply ing with the 10 BA SE-T standard, e ach port p r o vides support fo r features that ar e b eyond t h e scope of the 1 0BASE-T standard: ❑ suppo rts shield ed twisted pai [...]

Introd uction 1 - 3 Figure 1-1. 1 0 BASE-T M odule Faceplate and ONline System Con ce ntrato r[...]

1 - 4 ONl ine Ethernet 10 BASE-T Mod ule User’s G ui de Dip Switch es The 10BA SE-T Module has th r ee d ip switch es located on th e modu le: ❑ 8-swi tch d ip switch (SW1 ) ❑ 4-swi tch d ip switch (SW3 ) ❑ 8-swi tch d ip switch (SW6 ) T able 1-1. I nterpreta ti on o f the 10BASE-T Module LEDs LED Nam e Colo r State Indicates Activit y (Por[...]

Introd uction 1 - 5 Confi gure the swit ches to the s etting s you want if dif ferent than the default valu es. (Refer to T able 1-2 , T able 1-3, T abl e 1-4, an d T able 1-5 fo r an explanatio n of t h e dip switch s e t tings.) Figure 1-2 sho ws the lo cation of the dip s w itches. Figure 1-2. 10BASE-T Module and Dip Switch Locat i ons Dip Swit [...]

1 - 6 ONl ine Ethernet 10 BASE-T Mod ule User’s G ui de On po s i tion, therefore, all ports are initially enabled . T abl e 1 -2 desc ribes the settin gs and fu nction s for switch es 1 th roug h 8. If you have an ONline Ethern e t Network Manag ement Mo d ule in stalled in your concent rator , yo u can rem otely overrid e the se switch s et tin[...]

Introd uction 1 - 7 T able 1- 3 explains crossov er mode a nd sq uelch mod e switch settin gs and the sectio ns follo wing the table explain these features in more detail. The channel selecti on switch e s are discussed in T ab l e 1-4. Crossover M ode Sw itch All eight ports on the 10BASE-T Module are internally crossed over as per 10BAS E - T sta[...]

1 - 8 ONl ine Ethernet 10 BASE-T Mod ule User’s G ui de The Of f posit io n s et s the Squ elch level to low . When the Squelch level is set to low , the ports ar e able to r eceiv e weaker signals. Note that Lo w Squelch mode does no t con form to the 10B ASE-T stand ar d. If you ch ange the module's Squelch l e vel to lo w , yo u must chan[...]

Introd uction 1 - 9 10BA SE-T Mod ule is ini tially conf igured to channel 1. T o recon fig ur e the module to a di ffer en t ch annel, r efer to the in form a t ion in T able 1 -4. If you have an ONline Ethern e t Network Manag ement Mo d ule in stalled in your co ncentrato r , yo u can re m otely override these swit ch settings. Dip Swit ch SW6 ([...]

1 - 10 ONline Eth ernet 10B ASE-T Mo dule User’s Guide If you enabl e a port and disable Lin k In tegrity , the Statu s LED is o n for 10 seconds and b links off for 4 00 msecs to ind icate that L ink Integrit y is disable d. T able 1- 5 lists the settings and f un ctions for sw itc hes 1 throu gh 8 . If you have an ONline Ethern e t Network Mana[...]

Intro ductio n 1 - 11 assigned. The channel check sequence re peats f ive ti m es. T ab le 1 -6 exp lains the chann el check co des. The LED/Chan nel C h eck b u t ton and the Controller Module are explained in more detail in the ON line C ont roller M odul e In stallation Gu ide . The ONli ne E ther net Network Manage me n t Module The ONline Netw[...]

1 - 12 ONline Ethernet 10BASE-T Mo dule User’s Guide ❑ chang e channel selectio n (per m odule) (SET MOD ULE 4 CHANNEL 2) The O Nlin e Eth ernet Manageme nt Mo dule allows yo u to set redundan cy between the ports. Refer to R edundant Link s in Chap ter 2 for an example of setting redun danc y between co nc e n trat ors using 10 BASE-T Mo dules[...]

Designin g and Expand ing the Net work 2 - 1 2 Designing a nd Expanding the Network This appen di x contain s co nfigu ratio n informa t ion that w ill help you to design your networ k. Install all e quip ment u sing o nly ap proved cables for proper operation . Refer to A ppendix A in the T wisted Pair Conn ectors an d Cabl e s section fo r in for[...]

2 - 2 ONl ine Ethernet 10 BASE-T Mod ule User’s G ui de Unders tand ing the Gen eral R ules As part of yo ur netwo rk d esign, it is imp ortant to c on sider your n e t wo rk size. For instance, is the network (end-to-end) 100 met ers, 1000 meters, 4000 meters, or m o re? What are your plans for expansion? Y o ur answers play a role in ho w yo u [...]

Designin g and Expand ing the Net work 2 - 3 T able 2-1 outli nes the seven basic rules to keep in mind w hen you c ons truct your net wor k . T able 2-1. Seven B asi c Netw or k Rules Rule Definition Rec omme ndat ion s/ Notes 1 If pos s ible, use 10BAS E - FB as the backbon e me dium. Use 62.5 m icron cable to c onform with th e I EEE 10BA SE-F a[...]

2 - 4 ONl ine Ethernet 10 BASE-T Mod ule User’s G ui de 4 Certain LA N devices on th e netw ork shrin k the maxi mum Fibe r Ethern et network diamet er to less than 42 00 me ter s. Many L A N products delay the sign a l that goes through them. This is known as equivalent distance . Every microsecond delay reduces th e maximum lin k distanc e. In [...]

Designin g and Expand ing the Net work 2 - 5 6 The fiber li nk distances must not exc eed the limits imposed by the optical pow er budget. In g eneral, on 62.5 m icr on cabl e, you can g o up to 4000 m eters poin t-to-po int using the ON core or ONline Fiber Modules. If you h ave poor qualit y cable or cros s m any patch panels, you may h ave to sa[...]

2 - 6 ONl ine Ethernet 10 BASE-T Mod ule User’s G ui de LAN E q uiv alence LAN equ ivalence i s the sum of both t he inc oming and outgo ing modu le port signals. Differe n t modules, however , h ave d if f er ent equival e nt distances. T a b le 2-2 lists the LAN product equ ivalent distances. T able 2-2. LA N P roduct Equiv alent D istan ces LA[...]

Designin g and Expand ing the Net work 2 - 7 Fib er Bac kbo n e, T wisted Pai r T o-The- D esk Wh en yo u configure a network wit h unshield ed or shiel ded twisted p air cabling to -the-desk an d fib er for the backbon e , there are only thr ee additi onal rules you need to be awa re of: ❑ Ther e can be no mor e t h an eight 10BASE-T Mod ules (5[...]

2 - 8 ONl ine Ethernet 10 BASE-T Mod ule User’s G ui de ❑ There is an equivalent fi b e r distance for the 1 0BASE-T Modules (see Rule 4). The equivalence is: – 420 meters for signals that exter n ally enter a 10BASE-T Mod ule port – 165 meters f or signals t hat inter nally e nter a 10 BASE-T Mod ule vi a th e O Nline Concen trator backpla[...]

Designin g and Expand ing the Net work 2 - 9 . Figure 2-1. Sam pl e C onf iguration D i st ance Calculati on Use the following steps to deter mine whether your netwo rk con figuration is legal: 1. Begin with 4.2 km (4200 m ) since thi s is the max i m u m networ k diameter fo r a pur e fib er netw or k (Rule 3). 2. Subtract 10 0 m for the signal ex[...]

2 - 10 ONline Ethernet 10BASE-T Mo dule User’s Guide For the co nfigur a t ion show n in Figure 2-1 to work, the fib er equivalent distance betw een transceiver A and transceiver B must be less than 4200 meters. As you c a n see in the calculation , there ar e still 15 10 meters left fo r expansion in this conf iguratio n. Be awar e th a t the li[...]

Des igni ng and E xpa ndi ng t he Net work 2 - 11 T wisted Pair B ackb o ne, T wisted Pair T o-Th e-Des k In con structin g a twiste d pair b ackbo ne, one add itional con figurati on rule must b e co nsid er ed: ❑ There can be no mo r e than eight 1 0BA S E- T Modules in the path between an y t w o transceivers due to the Ethern et fou r -repeat[...]

2 - 12 ONline Ethernet 10BASE-T Mo dule User’s Guide Whi le there is no fiber in this co nfigu ration, t he fib e r equiv alent di s tanc e can be cal cul at e d a s follo w s: T o tal lin k distance: 15 0 m + 100 m + 1 00 m + 50 m + 20 m = 420 m T otal equ ivalent distan ce of 10 BA SE-T Mo dul e s : 4 * 420 m + 4 * 1 65 m = 234 0 m (signal e xt[...]

Des igni ng and E xpa ndi ng t he Net work 2 - 13 T o set r edundancy betwe e n two 10 BASE-T M o dules, con nect t w o links between the mo d ules. The redundant link must be connected to a p ort on the same 1 0 BASE-T Module as the prim a ry link. Use a crossover adapter between each lin k unle ss you ch oo se to uncross port 8 on on e o f the mo[...]

2 - 14 ONline Ethernet 10BASE-T Mo dule User’s Guide Patch Panel s Patch panels weaken sign als, thereby reducing achievable lin k distance s . 3Com includes the use of one patch panel in t he 1 50 m e ter link distan ce calculatio n. Howev er , each addi tional patc h pan el in the link redu ces the 150 meter lin k d istance b y app r ox i matel[...]

Installing an d Operat ing the Mo dule 3 - 1 3 Installing and Operati ng the Mod ule This chapter descr ibes the precautionary , unpackin g, and installati on procedures for the Ether n et 10BA S E -T Mod ul e . Pr ecau tionary Pro c ed ur es Electrostatic discharge (ESD) can damag e static-sensitiv e devices o n circuit boar ds. Foll ow t hese pre[...]

3 - 2 ONl ine Ethernet 10 BASE-T Mod ule User’s G ui de Unpac king Pr oced ures Use the follow ing proced ure when u np acking you r 10 BAS E -T Mod ule. 1. V eri fy th at the 10BA SE-T Mo dul e is the correct mod el by matc hin g the m odel numb er listed o n the side of the ship pin g carton t o the model number y o u ordered (5108M-TP). Note t[...]

Installing an d Operat ing the Mo dule 3 - 3 1. Set the dip sw itch es on the board to the settin gs you want , if different than the default valu es. (Refer to T able 1-2, T able 1-3, T ab le 1-4 , and T ab le 1-5 for an explan ation o f the dip s witch setti ngs. ) 2. Locate a blank slot in the conc entrator . If there is no blan k slot, you mu s[...]

3 - 4 ONl ine Ethernet 10 BASE-T Mod ule User’s G ui de 4. Fasten the sprin g - loaded scr ews on the front of the 10BASE-T M odule face-plat e to t he concen trator w ith yo ur fing e rs (do not overtigh ten). 5. Attach the twisted pair cable to the port o n the fro n t o f the 10BASE-T Module as shown in Figure 3-2. Then attach the other end of[...]

Troublesh ooting 4 - 1 4 T roubleshooting This chapt er describes troubleshooting procedures for the ON li n e Ethernet 10BA SE-T M odule. Inf or m ation o n trou bleshooti ng will assist you i n verifyin g operatio n . T ypical fault c on ditions are addressed in thi s chapt er . T r oub lesh ooti ng Diagno stic featu r es are covered in T able 1 [...]

4 - 2 ONl ine Ethernet 10 BASE-T Mod ule User’s G ui de T roublesho oting Wi th the Statu s LEDs A blinkin g Port St at us ind icato r may be a s i gn th at the p ort detects a potenti al problem. On ce a p ort detect s a problem, yo u can furth er analyze the problem by co unting th e n um b er of blinks. T ab le 4-1 provide s tr o ub leshooting[...]

Troublesh ooting 4 - 3 1 Blink Link Integ rity Err o r Ca bl e no t connec ted Connect cable. Cable broken Check cable with cab le tester . Repair or replace cable. Cabl e too long T ry a shorter cab le. Remote connectio n has Link Integ rity disabled Enable Link Integrity at r em ote c onnect ion o r if the remote l ink does not have Link Integ ri[...]

4 - 4 ONl ine Ethernet 10 BASE-T Mod ule User’s G ui de 2 Blinks Port Partitioni ng Faulty cable Check cable with cab le tester . Repair or replace cable. Networ k over loaded Reassign users to another ch annel to balance the load . Jabbe r condi tion T ransceiver attached to t h e port is jabber in g or has DTE jabbe r T ry another por t or r ep[...]

Troublesh ooting 4 - 5 T roublesho oting Wi th the Activity LEDs Ther e may be s ituatio ns w h er e a port's Acti vity L E D may not light. Use the tr o ub leshootin g sug gestions in T abl e 4-2 to help isolate wh y this has occur red. T able 4-2. T roubleshooting W ith the Port Activity LEDs L ED Na me LED State Poss ible P r oble m T roubl[...]

4 - 6 ONl ine Ethernet 10 BASE-T Mod ule User’s G ui de T echn ica l As si sta nce Y ou can receive as s istance fo r instal ling and t r ou bleshoot ing the 1 0BA SE-T Module b y calling eith er your 3Com reseller or 3Com T ech ni c al Support. Be pre p a red to s upp ly a r epre sen tative with t he foll owing info rmation: ❑ De s c riptio n [...]

Sp e c ification s A - 1 A Spec ifi cations ONli ne Eth e rn et 10BASE-T Modul e Spec ifi cati ons This append ix lists specific ations for the 1 0BASE-T Module. There a re five subsections : ❑ Electrical Spec ifications ❑ En vironmen tal Specificati ons ❑ Mech anical Specific ations ❑ Gen eral Specif icatio ns ❑ T wisted Pair Co nnector [...]

A - 2 ONl ine Ethernet 10BA SE-T Module User’s Gui de Enviro n mental S pecifications Operating T emp eratur e: 0° to 50° C (32° to 122 ° F) Storage T em perature: -30° to 65° C (-22° to 14 9° F) Humidity: less than 95%, no n-condensing BTU/hr : 30 Mechan ical Specificatio n s Dim ension s: 1.0" W x 10 .25" L x 8.5" H (2.54[...]

Sp e c ification s A - 3 Cabl e propagation veloci ty: >.58 5c Host Interface: 3Com ONline System Concentrator b us interface standard Installat ion Attac hm ent: T wo th u m bscrews o n the mo unting brac ket T wi s ted Pair C onn ecto rs an d Cabl es Ther e are many types of cab les and co nnectors that yo u can u s e to link your 10BAS E -T M[...]

A - 4 ONl ine Ethernet 10BA SE-T Module User’s Gui de Refer to Figure A-1 for an exampl e of this co nnector and the cab le pin-o uts. Figure A-1. RJ45 Connector Pin-outs Some instal lations ma y have 50 -pin T elco c onnecto rs at the wiring c loset. We recomm end using a p atch pan el t hat converts from 50-pin to RJ4 5-type connec tors. T his [...]

Sp e c ification s A - 5 Connecting T wisted Pair Cab les We r eco mmend that yo u conn ect cables first a t the activ e c oncentr at or location , and conn ect transceivers second. Refer to the ONline System Con centrator I nstallation an d Operat ion Guid e f or more inform ation ab out the ON line System C oncentr ator c onnectio ns.[...]

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Technical Support B - 1 B T echnical Support 3Com prov ides easy acce ss to technical support in formation through a variety of servic es . This app endi x describes the following s ervices: ❑ On -line T ec hnical Sup port ❑ Su pport from Y our N etwork Sup plier ❑ Su pport from 3Com ❑ Retur nin g Produc ts f or Rep air ❑ Accessin g the 3[...]

B - 2 ONl ine Ethernet 10 BASE-T Mod ule User’s G ui de Email T ech nical S u p port Y ou can contact the Integ rated Systems Division (for merly Ch ipcom) on the Inter net for tech nical suppo rt using th e e-mail address techsu pp@c hipco m.com. World Wi d e Web S ite Y ou can acc ess the latest netwo rking info rm ati on on the 3 Co m Worl d W[...]

Technical Support B - 3 When y ou c ontact you r network sup plier for a ss istance, hav e the f ollow ing inform at ion re a d y: ❑ Diagn ostic error messages ❑ A list of system hardware and software, inclu ding r evisio n level s ❑ Details abou t r ecent con fig ur a tion chan ges, if ap plic able If you are unable to co ntact yo ur networ [...]

B - 4 ONl ine Ethernet 10 BASE-T Mod ule User’s G ui de For access to customer service for all 3Com p roducts, call (800) 87 6 -3 2 6 6. Y ou can also contact the Integrated Sy s t ems Division (ISD) on t he I n ternet by u sing t he e - mail add r ess techsup p@ch ipcom.co m. Retur ni ng P r od ucts fo r Repair A product sent directly to 3 C o m[...]

Technical Support B - 5 3. En ter you r full Inter net e-m ail add r ess as the passwor d (for exam ple, jdoe @com pany. com ). 4. Chan ge to th e m ib or schem a directo ry using th e cd /p ub/mi bs or cd /p ub/ mi bs /s ch em as command. 5. T o view t he 3Com MIB, O ID, or sch ema e ntries, enter the dir command. ❑ T o pause the d isplay , p re[...]

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Inde x 1 Inde x Numerics 3Com Bull etin Board Service (3C omBBS) , B - 3 A Audienc e of M anu al , x i B Backbone Fiber Medium , 2-2 bulletin board service , B-3 C Cable Typ es Shielded Twisted Pair , 1-1 Unshielded Twis t ed Pair , 1-1 Cabling Connectors , A-3, A- 4 Fiber Backbone , 2-7, 2-8, 2-1 0 Redundant Links , 2-13 Twisted Pair Backbo ne , 2[...]

2 Inde x M MIB , B - 4 N network suppli e r suppo r t , B - 2 O ONline Co nt roller Mo dule , 1-10 ONline Ethernet Management Module , 1 - 1 1 , 1-12 on-line techni cal servic es , B-1 P Patch Panels , 2-14 R Redundancy , 2 - 1 3 returning produc ts for repair , B-4 S Shielded Twisted Pair , 2-10, 2-1 2 SNMP Commands , B - 4 Star Topology , 2 - 3 T[...]