Manuel d'utilisation / d'entretien du produit 5017C-LS du fabricant 3Com
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ONline 17-Sl ot System Concentrat or Insta llation and Operat ion G uid e Docu men t Nu mbe r 1 7-00 4 17-3 Printe d March 19 9 5 M o del Numbe rs: 50 17C-L S 50 1 7C 5 0 17C w ith lo ad sha ring 3Co m Corpo ration 1 18 T urnpike R oad Sout hbo r ou gh, M A 0 1 77 2-1 8 86 U.
i i ONli ne 17 - Slo t Sy st em C once ntra tor I nst al lat ion and Op erat io n Gu ide Feder al Comm unications Com mission Notice This equipment ha s b een t e sted and foun d to com p ly with the limits for a Cla ss A digit al device, pursua n t t o Part 1 5 of the FCC Rules.
ONli n e 17 -Slot System Con cent rator Ins talla t i on a n d O per a tio n Guide iii The Chipcom Multichannel Ar chitecture C o mmunications S y stem is registered un der U . S . Patent Nu mber 5,30 1 ,30 3. UNIX is a register ed trademark in the U.
i v O Nl ine 1 7-Sl ot Sys tem C oncent rat or I ns ta llati on an d O perat ion Gu id e.
Contents ONl ine 17 - Sl ot Sys tem C onc ent rato r Ins ta llati on an d Oper at io n Guide v How to Use T his Guide Au dien ce . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii i Structu re of Th i s Gu i de .
v i ONli ne 17 -S lot Sy st em C once ntra tor Ins tal lat ion and O per atio n Gu ide L oc ati on Requ ire ment s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 -4 Ve nti lat ion . . . . . . . . . . . . . . . . . . . . . .
ONl ine 17- Slot Sys tem C on centr ator Ins ta llati on and Oper atio n Guid e vi i Appen di x B — Slot Us a ge Chart Appen di x C — Techn ical Su pport On-lin e Tec hnical S uppo rt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
v ii i ONli ne 17 -Slo t Syst em Co nce ntr a t or I nst al lat io n and Ope rati on Gui de.
ON li ne Et herne t 10BA SE -FL Mo du le I nst al lat ion a nd O p erat ion Gu ide i x Figures Figu re 1-1 . Multip le 17 -Slot Conc entrator Envi ronmen t . . . . . . . . . . . . 1-2 Figu re 1-2 . ONli ne Sy stem Conce ntrator R ear V iew . . . . . .
x O Nl ine E ther net 1 0B ASE-F L Modul e In stall at ion an d Ope rati on Gui de.
ON li ne Et herne t 10BA SE -FL Mo du le I nst al lat ion a nd O p erat ion Gu ide x i Tab les Tabl e 2-1. Steps for Install ing th e ON l i ne Syst e m Con centra tor . . . . . . 2-6 Ta ble 2- 2. Ra ck M oun t S etting s . . . . . . . . . . . . . . .
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ONli ne 17 - Slo t Sy st em C once ntra tor Inst al lat ion and Op erat io n Gu ide x iii How to Use This Guide T his g u id e ex plai ns h ow to i nst all, ope rat e, and ma nag e t he f oll ow in g 3Com ONline ™ 17- S lot S ystem C o ncen trators .
ONl ine 17 - Slo t Sy ste m Conc ent rato r Ins tal la ti on and Oper atio n Guid e xiv Stru cture of Th is G uide This guide co ntain s the fol l owi ng chap ters: Chapte r 1 , I n tro du ctio n – Introd uces the princ ipal fea tures o f the ON line System Con centrato r a n d provid e s a fr ont and rear view of the un it.
ONli ne 17-S lot Sys tem Con ce nt rato r Instal l a tion and Op erat ion Gu ide x v Docu ment Conventi ons The fol lowing d ocumen t conve ntion s a re used in thi s ma nual: Con v entio n I ndica te s Ex ample Courie r te xt Use r inp ut In th e Age nt In formatio n F orm, enter MIS in the N ew Con ta ct fi eld.
x vi ONli ne 17 - Slo t Sy st em C once ntra tor I nst al lat ion and Op erat ion Gu ide Relat ed Doc u me nts This sec tion provi des i nforma tion on sup p ortin g do cume ntatio n, inc ludi n g: ❑ 3Co m Docu ment s ❑ Ref ere nc e Do cu ment s Note: A Note .
ON line 1 7-S lot Sy stem C once ntrat or I nst allat ion a nd Opera tion Gui de xvi i 3Com Documents The fol lowi ng doc um ents provi de ad ditiona l inform atio n on 3 Com produ cts: 17-S lot ON li.
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I ntro ducti on 1 - 1 1 Int roduc tion This c ha pter b riefly de scribes the capab ilities and opera tion of t he 3Com ONli ne™ S y stem Co ncentra tor . Cha pter 2 pro vides im porta nt inform a tion for in stallin g mo dules and verify ing th eir operat i on.
1 - 2 ONl in e 17- Slot Sys tem C on centr ator I nsta ll atio n and O perat ion Guid e F igure 1 -1 shows a mod el syst em that i nclud es ea ch of thes e c able types. In this di agra m, an ON lin e Eth erne t Repe ater Modul e is co nne cted to a 1 0BASE5 seg ment v ia an AUI cable and a tran s c eiver .
I ntro ducti on 1 - 3 Back Panel A pow er supply an d DC fan uni t are installed w hen you re c eive y our conce ntrator . There i s an On/O f f s witch on the powe r sup ply . The po wer s uppl y sho uld be powe red do wn wh en you inst all or remo ve it.
1 - 4 ONl in e 17- Slot Sys tem C on centr ator I nsta ll atio n and O perat ion Guid e Figur e 1-3. ON line Syste m Co ncentrat or Front Vie w A cabl e tray is p rovided wi th the co ncentrato r so that c ables y ou attach to the me dia mod u les can be r u n unde r the unit an d out the back − where they will not be in the wa y .
I ntro ducti on 1 - 5 Modula r Design The ON line Co n ce ntrator' s modul ar des ign l ets yo u add d ifferent m e dia mo dule s (su ch a s f ib er , twi sted pai r , and co axi al) in an y co mbi na t io n to conn ect dif f eren t types of med i a se gm ents .
1 - 6 ONl in e 17- Slot Sys tem C on centr ator I nsta ll atio n and O perat ion Guid e TriChannel A rchitect ure The ONline Syste m Co ncentra tor's T riChann el arch itectu re lets you run Etherne t, Toke n Ring , and FDD I netw orks, al l in th e sam e conce ntrato r .
I ntro ducti on 1 - 7 Figur e 1-5 . ON line Syste m Co ncentrat or Using M ultiple N etwork s.
1 - 8 ONl in e 17- Slot Sys tem C on centr ator I nsta ll atio n and O perat ion Guid e Fault-T olerance Ca pabilities The ONline Syste m Co ncentra tor prov ides fault to lerance through redund ant f.
I ntro ducti on 1 - 9 Bac kup C o ntroller Module The c o ntrol ler i s vital to the syste m bec ause it perfo rms im port ant fu nctio ns in clu ding : ❑ syn chr onizi n g al l mod ules ❑ mo nitoring conce ntrator c onditio ns (tem pera ture, po wer su pp l y statu s, etc.
1 - 10 ONli ne 17-S lot Syst em Co nce ntrat or I nst al latio n and Op erat ion Gu ide Figur e 1-6 . Redund ant Cable Link Co nfigura ti on Backup Concentrator A seco n d con centrator o r 3Com Fi ber Ethe rnet Star Coup ler ma y be us ed to bac kup the prim ary co n cen trator in a star-wi red net work.
Int rod u ctio n 1 - 11 Figur e 1-7 . Ba ckup Concentr ator Co nfigura ti on Hot S w a pping of Me dia Modules Medi a mod u les c an be ad ded, re m oved , and reconfi gured withou t pow eri ng down the ONl i ne Sy stem Co ncentrato r or affecting the re st of the netw ork.
1 - 12 ONli ne 17-S lot Syst em Co nce ntrat or I nst al latio n and Op erat ion Gu ide Synchro nous Backplane The ONline Syste m Co ncentra tor bac kplane is d e signed wi th all pa ssive compo nent s to ach i eve the m axim um rel ia b ili t y .
Ins t alla t i o n and T roub les hoot in g 2 - 1 2 Ins tallatio n an d Tr ou ble sh oo ting This cha pter d e scri bes ho w to insta ll the ONlin e Sys tem Con centra tor , how to inst all ONl i n e mo du le s, a nd how to i nst all the op tio na l back up power supp ly in to yo ur ONline u nit.
2 - 2 ONl in e 17- Slot Sys tem C on centr ator I nsta ll atio n and O perat ion Guid e – 1 5 bl ank fa ceplate s ❑ Chass is ra ck mount kit ❑ Ca b le tray with ra ck mo un t kit ❑ ONl ine Fa .
Ins t alla t i o n and T roub les hoot in g 2 - 3 If an y o f t h es e it e ms ar e d ama ged or mi ss in g, c on ta ct your l oc al s up pl ier or a 3Co m serv ice rep res entati ve.
2 - 4 ONl in e 17- Slot Sys tem C on centr ator I nsta ll atio n and O perat ion Guid e Site Sele ction Co nside rat ions The co ncen trator ca n be pl a ced alm o st an ywhe re withi n your co mpa n y , includ ing of f ic e s a nd co m puter roo ms. I n gen eral, w e reco m mend insta l l ation in a wirin g clos et.
Ins t alla t i o n and T roub les hoot in g 2 - 5 Caution : The concen trator sh ould h a ve tw o fans runn i n g a t all time s to co o l the unit p roperl y . Y ou sh ould there fore have: (A) a p ower supp ly (with b uilt-in f a n) and a f a n unit in st alled or (B) two p o we r supplie s installed.
2 - 6 ONl in e 17- Slot Sys tem C on centr ator I nsta ll atio n and O perat ion Guid e T able To p Installa tion Requirements For table top or shelf moun t installa ti on of the ONline S ystem Con c entra tor you must m a ke s ure the table or sh elf can support 1 0 0 pound s (4 5 kg) for a fully load ed 17 -slot c onc entrato r .
Ins t alla t i o n and T roub les hoot in g 2 - 7 Installing the Cable Tray The cable tra y that c om es sta ndard with the conc entrato r helps to ma nage the cables that run from the front of the un it s o they are fed un d er the unit and out thro ugh the back .
2 - 8 ONl in e 17- Slot Sys tem C on centr ator I nsta ll atio n and O perat ion Guid e Cable Tray R ack Mounting To in stall th e conce ntrator i n a rack, firs t instal l the ca b le tray and then insta l l t he con c entrator abov e the tra y .
Ins t alla t i o n and T roub les hoot in g 2 - 9 Figu r e 2-2 . Rac k Mo unt Po sitio ns Foll ow the step s below to mount the cabl e tray in yo ur rack: 1 .
2 - 10 ONli ne 17-S lot Syst em Co nce ntrat or I nst al latio n and Op erat ion Gu ide Note: The function of t he clip is to hold the n ut in place be hind the rail. Be s ure to insta l l the clip on to the rai l so that the nut i s cente red b ehin d the hole throu gh which you plan to in ser t the scr e w .
I n sta llat io n an d Trou bl esh oot ing 2 - 11 Installing the ONline S ystem Conc entrator The ONli ne Sy stem Concen trator can be pla ced o n to p of a tabl e or a she lf, or mo unted i n a rack. Mak e sure th e cable tra y has b een insta lled f i rst on the tabl e or in the ra ck (or th at 1 3/4" (4.
2 - 12 ONli ne 17-S lot Syst em Co nce ntrat or I nst al latio n and Op erat ion Gu ide Caution : You must use t he supp lied 8-3 2 x 1/4" s crews to attac h the rack m ount fla ng es . A longer s crew ma y extend too far in to the ONline chassis an d disrupt the i ns tal la tion of mo dule s.
I n sta llat io n an d Trou bl esh oot ing 2 - 13 Figur e 2-5 . Ch assis M ounted in Rac k T able To p Mount ing the ONline Concentrato r You can se t the ONl i n e Con centra tor dire ctly on a table top or she lf that can s upp ort a t least 1 0 0 poun ds (4 5 kg ).
2 - 14 ONli ne 17-S lot Syst em Co nce ntrat or I nst al latio n and Op erat ion Gu ide Installing the Backup Powe r Supp ly (Option al) Insta ll the ba ckup pow er supply in the ON line Sy stem Concentra tor (i f ordere d). This power sup ply pro vides p o wer redu ndan c y if the prim ary pow er supply sh ould fa i l .
I n sta llat io n an d Trou bl esh oot ing 2 - 15 Figure 2-7 . Unplug ging th e Fan Unit Befo re you ins tal l the n ew pow er supply , chec k the la bel on the in side of th e power sup ply bay that explai n s where each of the seven p owe r leads from the po wer su pply are co nnected in the co ncentrat or chassis.
2 - 16 ONli ne 17-S lot Syst em Co nce ntrat or I nst al latio n and Op erat ion Gu ide Figure 2-8. P owe r Su pply Connecto rs 3. Hold the ba c kup po wer suppl y in one hand while us i ng your other hand to plug i n the s even (7) le ads from the pow er supp ly as show n in Fi gure 2 -9.
I n sta llat io n an d Trou bl esh oot ing 2 - 17 4. M a ke su r e the cable is push ed up to t he right side a nd the n slide the pow er sup p ly into the back o f the co ncentra tor as sh own in Figure 2-1 0 . Then faste n with the four (4) s crews you re moved earl ier from the fan unit.
2 - 18 ONli ne 17-S lot Syst em Co nce ntrat or I nst al latio n and Op erat ion Gu ide 2. Us e a fl at-bla de sc rewdri ver to m ov e the v oltag e sele ctor s witch so th e settin g that i s appro pria te for yo ur coun try's l ine vo ltage is sh ow ing: 1 00/ 1 2 0 V ol t s or 22 0/2 4 0 Volt s, a s sh own i n Fi gure 2 -1 1 .
I n sta llat io n an d Trou bl esh oot ing 2 - 19 War ning: D O NO T u s e a 3-to-2 p rong e d ad apter a t the outle t sinc e this m ay res ult in el e ctri cal sh o c k and do es no t pro vide adeq uate g round ing. Installing ON line Modules War ning: On ly s er vic e per son ne l sh ould ins tal l ONl ine modul es.
2 - 20 ONli ne 17-S lot Syst em Co nce ntrat or I nst al latio n and Op erat ion Gu ide Figur e 2-1 2. N etw ork Cable Co nnections Power Up and Verification This sectio n te lls ho w to pow er up the co nce ntrator a nd v erify t hat i t is work ing c orrectly .
I n sta llat io n an d Trou bl esh oot ing 2 - 21 Fan Operation Verification To ve rify that t h e fan uni t and the power s upply fan are func tio n ing correctl y yo u need to v i sual ly in spect the fa n un it(s) o n the rear of the conce ntrator to ma ke sure they a re turning a nd that no thing is block ing their pa th.
2 - 22 ONli ne 17-S lot Syst em Co nce ntrat or I nst al latio n and Op erat ion Gu ide If any o f these LED s are no t li t as sho wn in th i s chart, refer to T ab le 2 -4 to troubl e sho ot the pro blem.
I n sta llat io n an d Trou bl esh oot ing 2 - 23 Prima ry Po wer (cont. ) Stead y bl inki ng (cont. ) The pri mary pow er supply is no t pro perly i ns t al led. Rei n s ta ll the pri mary pow er supply a nd turn i t on. T wo bl in ks , then a pa use (i n un is on with Ba ckup Power LED) The po we r load -shari ng hardw are i s in an e rror state.
2 - 24 ONli ne 17-S lot Syst em Co nce ntrat or I nst al latio n and Op erat ion Gu ide Back up Po wer (cont. ) Stead y bl inki ng (cont. ) The ba ckup pow er supply has fai led. See Prim ary Pow er LED sug g estion s for same State and Po s sib le Prob lem (a bove).
I n sta llat io n an d Trou bl esh oot ing 2 - 25 Tech ni cal As sist anc e Yo u ca n re ceiv e ass ist ance for in stal lin g and tr oubl esh ooti ng the 17- Sl ot conce ntrator by c alling your d ea l er o r 3Com Cu sto m er Suppo rt.
2 - 26 ONli ne 17-S lot Syst em Co nce ntrat or I nst al latio n and Op erat ion Gu ide ❑ th e confi guratio n of yo ur concen trator ❑ th e screen info rmation reporti ng the SH OW DEVI CE co mma.
Mai nt ena nce 3 - 1 3 Mai nt enance This cha pter desc ribes routi ne ma inten ance d esi g ned to k eep y our ONli ne System Concentra tor wo rking at i ts best.
3 - 2 ONl in e 17- Slot Sys tem C on centr ator I nsta ll atio n and O perat ion Guid e Routine Maint enance You shoul d insp e ct you r equ i pmen t to mak e s ure that all of the f ollowi n g are t .
Mai nt ena nce 3 - 3 Figur e 3-1 . Remo ving the Po wer Su ppl y 3. Careful l y pu ll the po w er supp ly o ut from the c oncentra to r and discon nect the seve n (7) power l eads from t he conne cto rs i nside the ba se of t he ONl in e un it as sh own i n Fig ur e 3-2 .
3 - 4 ONl in e 17- Slot Sys tem C on centr ator I nsta ll atio n and O perat ion Guid e Figur e 3-2. Unplugging the Po wer Su pply Note: Before you install the n ew pow er supp l y , ch e c k the l a .
Mai nt ena nce 3 - 5 Figur e 3-3. Powe r Supply Plug s in ONline System Conc entrator 5. M a ke s ure the c able is pus hed up to the ri ght si de an d slid e the pow er supply into the ba ck of the conce ntrator and fa sten it w ith the four (4) sc rews yo u remov e d f ro m the d efective uni t as sho wn in Fig ure 3-4.
3 - 6 ONl in e 17- Slot Sys tem C on centr ator I nsta ll atio n and O perat ion Guid e Figur e 3-4 . Bac kup Pow er Su ppl y Ins talled 6. Set the volta g e s e l e c t i on s w i tch on the b ack of.
Mai nt ena nce 3 - 7 Replac ing t h e Fan Unit A fan ins ta lle d in either the left or rig ht bays i s remov ed or insta l l ed in exactl y th e sa me m anne r as th e po wer s upply . Fo l l ow th e step s below to replace a fan unit: Caution : The concen trator m ust hav e two fans ru nning at all times to co o l the un it.
3 - 8 ONl in e 17- Slot Sys tem C on centr ator I nsta ll atio n and O perat ion Guid e 2. Careful l y pu l l th e fan u nit out from th e conc entrat or and disconn e ct th e wiring ha rness f rom the plug i n s ide the base of the ONli ne unit as sho wn in Fi g ure 3-6.
Mai nt ena nce 3 - 9 Figure 3-7 . Fan Unit Installed ONline Mod ule Mainte nance Refer to the ONline ins tallation guides that c o me w ith the modules for insta llati on and o perati on info rmati on.
3 - 10 ONli ne 17-S lot Syst em Co nce ntrat or I nst al latio n and Op erat ion Gu ide Vors icht : D i eses ge rät hat eine od er zwei netzv erbindu ngen.
Sp ecif ica ti ons A - 1 A Sp ecifi cati on s Ge ne ral Netw ork Pro to cols Sup porte d: Ethern et/IEEE 80 2.3 over vari ous m edia IEEE 8 0 2 .5 To ken Ring over v arious med i a A N SI FDDI Environ.
A - 2 ONl ine 17- Slot Sy st em Conc ent rato r I nst al la ti on and Op erat ion Gu ide Mechanic al Dime ns io ns: 17 .5" W x 18 .3"D x 8 .75"H (4 4.5 cm x 46 .5 c m x 22.2 c m) Weigh t: unloa ded, wi th one po wer s upply: 38 lb. (17 k g .
Sp ecif ica ti ons A - 3 Ac cesso ries Cable M ana ge ment Tray (5000CT): 17 .5"W x 18.3" D x 1 .75 "H (44. 5 cm x 46 .5 cm x 4.5 cm) 8 lb. (3 .6 kg .) Rack-M ount Kit (50 17RM): 2.5 lb. (1 .2 kg.) Backup Powe r Sup ply (50 17PS -3 2 5): 8 lb.
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Sl ot Usage Cha rt B - 1 B Slo t Us age Chart The ONline Syste m Co ncentra tor has seven teen s l ots, sixtee n of w hich are a vaila ble slot s for in st al lin g media modu les ( one s lot is oc cupi ed b y th e ONli ne Con trol ler M o dul e). The sl ot on the far left i s s lot numb er 1 and runs to s lot 17 on the far righ t.
B - 2 ONl ine 17- Sl ot Sy s tem Conc ent rato r Ins ta lla ti on and Oper at ion Gu ide 3 4 5 6 7 8 9 10 11 12 T a ble B -1 . Conc entrato r Sl ot U s ag e Chart (Co ntinue d ) Slot Modu le Type N et.
Sl ot Usage Cha rt B - 3 13 14 15 16 17 T a ble B -1 . Conc entrato r Sl ot U s ag e Chart (Co ntinue d ) Slot Modu le Type N etwo rk (# or Isolated) Rema rks.
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Technic al Support C - 1 C Tec hn ic al Sup port 3Com prov i des e asy a ccess to techn ical sup port in forma tion thro ugh a va rie t y of ser vice s.
C - 2 ONl i ne 17_ Slot Sy s tem Conc ent ra tor I nstal la tion and O per atio n Guid e Email Technical Support You ca n conta ct the Integ rated Syste ms Divi s ion (formerly Chipcom ) o n the Intern et for techn i cal support us ing th e e-ma il ad dress te chsu pp@ chip com.
Technic al Support C - 3 When you contact your netwo rk supplier for ass i stance, ha v e the fo l lowing inform ation rea d y: ❑ Di agnos tic err or me ssag es ❑ A lis t of system hardw are an d .
C - 4 ONl i ne 17_ Slot Sy s tem Conc ent ra tor I nstal la tion and O per atio n Guid e For acc ess to c usto m er serv ice fo r all 3Co m pro ducts , call (800 ) 8 7 6-3 2 66. You can also co ntac t th e Integ rated S yste ms Div i sio n (ISD) o n the Inte rnet by us ing the e-m ail a ddress techsup p@c hipcom .
Technic al Support C - 5 3. Enter yo ur full I nterne t e-mai l add ress a s the p asswo rd (for exam ple, jdoe @com pany. com ). 4. Change to the mib or sc hema direc tory using the cd /p ub/m ibs or cd /p ub/ mi bs /s ch em as com man d. 5. To v i ew the 3Co m MIB, OID , or schem a entri es , enter the di r co mmand.
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Ind ex 1 Index Numer ics 3Com Bull e tin B oard Service (3C omBB S ) , C-3 A Audie nce of Ma nual , xiii B Back Pan el , 1-3 Ba c k up Powe r Su pply Insta lling , 2-1 4 bulle tin bo ard ser vice , C-.
2 Ind ex Power Sup ply Lo ad S har in g , 1-8 Repl acing , 3 - 2 Q Quick Inst a llat ion , 2 - 6 R Ra ck M ount ing , 2 - 1 1 Prepa ratio n , 2-5 Re gul ato ry Co mp lian ce , A-2 returning pro duct s.
Un point important après l'achat de l'appareil (ou même avant l'achat) est de lire le manuel d'utilisation. Nous devons le faire pour quelques raisons simples:
Si vous n'avez pas encore acheté 3Com 5017C-LS c'est un bon moment pour vous familiariser avec les données de base sur le produit. Consulter d'abord les pages initiales du manuel d'utilisation, que vous trouverez ci-dessus. Vous devriez y trouver les données techniques les plus importants du 3Com 5017C-LS - de cette manière, vous pouvez vérifier si l'équipement répond à vos besoins. Explorant les pages suivantes du manuel d'utilisation 3Com 5017C-LS, vous apprendrez toutes les caractéristiques du produit et des informations sur son fonctionnement. Les informations sur le 3Com 5017C-LS va certainement vous aider à prendre une décision concernant l'achat.
Dans une situation où vous avez déjà le 3Com 5017C-LS, mais vous avez pas encore lu le manuel d'utilisation, vous devez le faire pour les raisons décrites ci-dessus,. Vous saurez alors si vous avez correctement utilisé les fonctions disponibles, et si vous avez commis des erreurs qui peuvent réduire la durée de vie du 3Com 5017C-LS.
Cependant, l'un des rôles les plus importants pour l'utilisateur joués par les manuels d'utilisateur est d'aider à résoudre les problèmes concernant le 3Com 5017C-LS. Presque toujours, vous y trouverez Troubleshooting, soit les pannes et les défaillances les plus fréquentes de l'apparei 3Com 5017C-LS ainsi que les instructions sur la façon de les résoudre. Même si vous ne parvenez pas à résoudre le problème, le manuel d‘utilisation va vous montrer le chemin d'une nouvelle procédure – le contact avec le centre de service à la clientèle ou le service le plus proche.
