Instruction/ maintenance manual of the product MT3334HD8 Multitech
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MT3334HD8 Modem User Guide.
MT3334HD8 User Guide P/N 82063701, Revi sion B Copyri ght © 1997 by Multi-T ech Syste ms, Inc. All right s reserved. This publicat ion may not be repr oduced, in whole or in par t, without pri or expressed writte n permissi on from Multi-Tech Syst ems, Inc.
CommPlete Communic ations Se rver iii Federal Communic ations Commiss ion S t ateme nt This equipment has b een tested and fou nd to comply with the limits for a Class A d igital device, pursua nt to Part 15 of the FCC Rules .
iv CommPlete Communic ations Se rver FCC Fax W arning The Te lepho ne Consum er P rote ction Act of 1991 m akes it un lawful f or any perso n to use a co mpute r or other e lectr onic device to send a.
CommPlete Communic ations Se rver v T able of Content s 1 Introduction Introduction ...................................................................................................................................................... 2 LED Indicators .
vi CommPlete Communic ations Se rver 5 Testing the MT3334HD8 Introduction ................................................................................................................... .................................. 54 Local Analog Loopback Test (V.
CommPlete Communic ations Se rver 1 1 Introduction.
MT 3334HD8 User Guid e 2 CommPlete Communic ations Se rver Introduction The Mul ti-Tech MT3334HD8 is a hi gh speed, h igh densi ty mo dem card f or t he Co mmPlete Commun icatio ns Server . Each MT3334HD8 car d contai ns eight integr ated 33,600 bp s modem s.
1 Introduction CommPlete Communic ations Se rver 3 Chapter 2 Installat ion This chap ter de scribes h ow to in stall the MT3334H D8 into t he CC9600 chassis.
MT 3334HD8 User Guid e 4 CommPlete Communic ations Se rver T echnical Specifications Model Number MT3334HD8 Data Rates (Modem) Eight indep endent modem s (Modem A, B , C, D, E, F, G, H), each o perat .
1 Introduction CommPlete Communic ations Se rver 5 (2400 & 1200 bps) Recei ve answer: 1200 Hz Carrier Frequencie s: Bell 103/113 (300 bps) Transmit origina te: Receive originate: Transmit answer: .
MT 3334HD8 User Guid e 6 CommPlete Communic ations Se rver Pow er Requirements 5 VDC at 0.95 A ±16 VDC at 0.1 A Power Consumption Approximately 6 watts Dimensions 23.
CommPlete Communic ations Se rver 7 2 Inst allation.
MT 3334HD8 User Guid e 8 CommPlete Communic ations Se rver Introduction This chap ter de scribes h ow to in stall the MT3334H D8 modem card int o a Co mmPlete Communication Server CC9600 chassis. Thi s equipm ent sho uld be in stall ed only by a qualif ied ser vice per son.
2 Installatio n CommPlete Communic ations Se rver 9 Pre-Inst allatio n Notes Warning: In terconnection direc tly, or by wa y of other appara tus, of ports marked “ SAFETY WARNING see instructions for u se ” with ports marked or not s o marked may prod uce haz ardous c onditions on the network.
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CommPlete Communic ations Se rver 11 3 A T Commands.
MT 3334HD8 User Guid e 12 CommPlete Communic ations Se rver W orking w ith A T Commands The MT3334H D8 ’ s modems ar e controll ed by instr uctions call ed AT command s , so called because th e attent ion char acters AT precede each command or command string (sequence of commands).
3 A T Commands CommPlete Communic ations Se rver 13 A parameter after a command (0, 1, 2, etc. ) tells the modem which option to us e. If you do not specify a parameter, the mod em assu mes the 0 (z ero) option.
MT 3334HD8 User Guid e 14 CommPlete Communic ations Se rver Table 1. AT Co mmands by Funct ion Topic Command Description Page Dialing Action D Dial 16 A: Continuous redial H On-hook/off-hook Dial Modi.
3 A T Commands CommPlete Communic ations Se rver 15 Error Correction & &E0 Non-error correction mode 31 Data Compression &E1 Auto-reliable mode &E2 Reliable mode &E14 Data compression disabled &E15 Data compression enabled #L V.
MT 3334HD8 User Guid e 16 CommPlete Communic ations Se rver Dialing Commands Dialin g comman ds are used t o dial an d to hang up . Ds Dial s = phone number Default: none The letter D in a command c auses the modem to dial the telephone numb er immediately following it.
3 A T Commands CommPlete Communic ations Se rver 17 pauses in the dial sequence, automati c redials i f a number i s busy, and reverti ng to comm and mode or switching to a nswer mode a fter dialing.
MT 3334HD8 User Guid e 18 CommPlete Communic ations Se rver Rn Reverse Originate/ A nsw er Mode n = 0 or 1 Default: R0 The R comman d lets you rev erse the modem ’ s mode of opera tion from originate to an swer, or from answer to orig inate; for example, if you need the modem to an swer the phone but then g o into originate mode.
3 A T Commands CommPlete Communic ations Se rver 19 @ Q uiet Answer Use the @ command to access a sy stem t hat does n ot pr ovide a dial tone . The @ command causes the modem to wait before proces sing the next chara cter in the dialing s tring. The wait is for one or more rings back foll owed by fi ve seconds of si lence.
MT 3334HD8 User Guid e 20 CommPlete Communic ations Se rver You can au tomatically dia l a telephone number that is stored in the modem ’ s number memory by typing ATN n , where n = 0 or 1. For exam ple, y ou can dial a number stor ed at N0 by t yping ATN0 in terminal mode and pressing E NTER .
3 A T Commands CommPlete Communic ations Se rver 21 &Fn Load Default Configurati on n = 0, 8, or 9 Default: &F8 MT3334HD8 mode ms stor e facto ry def ault AT com mand set tings and S-r egiste r value s in read-o nly memo ry (ROM); t hey stor e your custom AT command an d S-regist er value s in nonvo latil e rando m access memor y (NVRAM).
MT 3334HD8 User Guid e 22 CommPlete Communic ations Se rver En Echo Command Mode Characters n = 0 or 1 Default: E1 Normally, wh en you type commands on the keyb oard, the modem echoes the characters ba ck to the computer or terminal, which d isplays them on the monitor.
3 A T Commands CommPlete Communic ations Se rver 23 &Qn Result Codes ( Multi -Tech or Standard A T) n = 0 or 1 Default: &Q0 The MT3334HD8 gi ves you a cho ice betwe en Mult i-Tech r esult co des and standar d AT comm and set responses.
MT 3334HD8 User Guid e 24 CommPlete Communic ations Se rver &A n Answerback n = 0 or 1 Default: &A0 The &A command co ntro ls the MT3334HD8 ’ s answer back feat ure. Answer backs are used in so me onl ine real ty appl icati ons and el sewher e as a securi ty m easure.
3 A T Commands CommPlete Communic ations Se rver 25 %DC n A T Command Control n = 0 or 1 Default: %DC0 The %DC command allows you t o disable the m odem ’ s abi lity to respond to AT commands.
MT 3334HD8 User Guid e 26 CommPlete Communic ations Se rver #F n Fallback Modes n = 0, 1, or 2 Default: #F2 The #F command controls w hether the modem will fa ll back to a lower s peed beca use of a n unac ceptab le error rate.
3 A T Commands CommPlete Communic ations Se rver 27 &P1 sets a pul se dial rati o of 67 m s break t o 33 ms m ake. &RD n Square Wave Ring Detect n = 0 or 1 Default: &RD0 (U.
MT 3334HD8 User Guid e 28 CommPlete Communic ations Se rver Y n Long Space Disconnect n = 0 or 1 Default: Y0 When two modems a re connected in reliable mode, a link disconnect reques t packet is sent to request a disconnect. In non-error corr ection mode, there is no “ polite ” way to request a disconnect.
3 A T Commands CommPlete Communic ations Se rver 29 RS-232 Interface Command s These co mmands de fine h ow an MT3334HD8 m odem wi ll use and resp ond to st andard RS-232 si gnals. &C n Carrier Detect Control n = 0, 1, 2, or 4 Default: &C1 The &C command lets yo u contr ol th e Carri er Det ect (CD) sign al on th e RS-232/V.
MT 3334HD8 User Guid e 30 CommPlete Communic ations Se rver &R n Clear to Send Control n = 0, 1, or 2 Default: &R1 The &R command l ets yo u contr ol th e state of the Clear to Send (CT S) signal o n pin 5 of the R S-232/V.24 interface. Norma lly, CTS follow s RTS when the mod em is online.
3 A T Commands CommPlete Communic ations Se rver 31 Error Correction and Data Compression Command s You can configure a modem to any of three different V.42 modes of operation (each mode can be with or without compress ion). They are the non -error correction, a uto-reliab le, and relia ble modes.
MT 3334HD8 User Guid e 32 CommPlete Communic ations Se rver $E n V.42 Error Correction at 300 bps n = 0 or 1 Default: $E0 At 300 bps, err or cor rect ion is no t norm ally used.
3 A T Commands CommPlete Communic ations Se rver 33 $R n Retransmit Count n = 0 or 1 Default: $R0 If errors are receiv ed during a reliable c onnection, the mod em re-sends the block of data that conta ined an error. If another error occ urs, it re- sends the b lock aga in.
MT 3334HD8 User Guid e 34 CommPlete Communic ations Se rver $MB n Modem Baud Rate n = speed in bits per second Default: $MB33600 The $MB command s ets a mode m ’ s init ial tr ansmissi on spee d for origi nate m ode. In V.32 m ode (9600 bps), it also sets the transmi ssion speed for answer mode.
3 A T Commands CommPlete Communic ations Se rver 35 $SB300 300 bps $SB1200 1200 bps $SB2400 2400 bps $SB4800 4800 bps $SB9600 9600 bps $SB19200 19,200 bps $SB38400 38,400 bps $SB57600 57,600 bps $SB11.
MT 3334HD8 User Guid e 36 CommPlete Communic ations Se rver L8 List Onl ine Diagnost ics Default: none The L8 command d isplays the modem ’ s onlin e status. Y ou can pri nt thi s display and use it as a m odem status re port or as diagno stic i nform ation (such as when cal ling Te chnical Support ).
3 A T Commands CommPlete Communic ations Se rver 37 $EB0 enables a 10-bi t for mat It automat icall y detect s parit y when an AT command is issued. $EB1 enables an 11-bit fo rmat . &E3 F low Control Dis able The &E3 command complet ely disabl es data flow contr ol init iated by the mo dem.
MT 3334HD8 User Guid e 38 CommPlete Communic ations Se rver When two modems are connected in non-err or corre ction mode, XON/XOFF flow control can be used as a complement to XON/ XOFF pacing. &E10 disab les non-error c orrection mode flow control.
3 A T Commands CommPlete Communic ations Se rver 39 Escape Sequ ences Escape sequences a re also known as esca pe codes. They are used to caus e the modem to enter command mode from online mode without disconnecting the call.
MT 3334HD8 User Guid e 40 CommPlete Communic ations Se rver O Go Back Onli ne You can use the O command to bring the modem ou t of command mod e and ba ck into online mode.
3 A T Commands CommPlete Communic ations Se rver 41 #S yyyyyy Change Setup Passw ord yyyyyy = password Default: #SMODEMSETUP Use the #S command to ente r or change t he rem ote conf iguration se tup password. B efore yo u can use it, you must en ter th e login passwo rd using t he #I command.
MT 3334HD8 User Guid e 42 CommPlete Communic ations Se rver &RP Immediat e Line Probe Default: none This i mmedi ate acti on com mand in itiat es a ret rain t hat mak es the p roce ssor re ad line prob e info rmat ion for display u sing the L9 , L10 , and L11 commands.
3 A T Commands CommPlete Communic ations Se rver 43 U n Loopback Test Modes n = 0 – 3 Default: No ne Loopback tests s end data through the modem in su ch a way tha t it loops back to the termina l where it was entered, testing a ll the circuits along the w ay.
MT 3334HD8 User Guid e 44 CommPlete Communic ations Se rver.
CommPlete Communic ations Se rver 45 4 S-Registers.
MT 3334HD8 User Guid e 46 CommPlete Communic ations Se rver Introduction This chap ter descr ibes t he MT3334HD8 ’ s S-regist ers , which are sm all r egions of memor y where modem configuration information is stored. W hereas AT command s tell a modem what to do, S- registers tell the modem how or when to do it.
4 S-Regist ers CommPlete Communic ations Se rver 47 S3 defines the carriag e return character b y its decimal AS CII code. The defa ult setting is the ^ M charac ter (decimal 13), which is the code for the E NTER key on most keyboards. S3 may b e set for any AS CII character .
MT 3334HD8 User Guid e 48 CommPlete Communic ations Se rver S8 determines the length of the pau se caused by a comma in a dialing command . The default s etting is two seconds for the N orth American model, a nd four seconds for the International a nd U.
4 S-Regist ers CommPlete Communic ations Se rver 49 S24 PBX/CBX Disconnect Drop Time for DSR/CTS/CD Unit: 50 m s Range: 0 – 255 Default : 20 (1 second) Some PB X and CBX phone systems re quire th e modem ’ s DSR, CTS, and/o r CD signal s to dro p brie fly wh en calls ar e disconn ected.
MT 3334HD8 User Guid e 50 CommPlete Communic ations Se rver S36 sets the time between when DTR g oes inactive an d when the modem goes off-hook. The DTR busy -out feature is disabled w hen S36 is set to 0. Normally, when the DTR s ignal from the computer goes ina ctive, the modem goes on-hook after a time that is set b y S25 .
4 S-Regist ers CommPlete Communic ations Se rver 51 Reading and A ssigning S-Registe r V alues Use the S command t o assign a val ue to an S-regist er and t o read an S-regist er ’ s current valu e. To re ad an S-regi ster val ue, in term inal mode, t ype S, the S-register number, and a question ma rk ( ? ), and press E NTER .
MT 3334HD8 User Guid e 52 CommPlete Communic ations Se rver The &W0 (or &W ) command stores all current AT command and S-register values into nonvolatile random access m emor y (NVRAM) and confi gures the modem so that it reads your custom se ttings in NVRAM w hen the modem is turned on or w hen it is reset with the Z command.
CommPlete Communic ations Se rver 53 5 T esting the MT3334HD8.
MT 3334HD8 User Guid e 54 CommPlete Communic ations Se rver Introduction Each tim e you p ower up the MT3334H D8, it per for ms an auto matic se lf-te st to e nsure p rope r oper atio n. The MT3334H D8 also has th ree di agnostic tests: l ocal anal og loo pback, digi tal lo opback (remote/auto matic), and digit al loopback (local /manual).
5 Testin g the M T 3334HD8 CommPlete Communic ations Se rver 55 3. Note that the CD LED is on. If you ’ re set fo r 14,400 bps or higher , the Sp eed LED sh ould be o n. If th e CD LED is not on, there is a defect in your modem. 4. Enter characters from your keyb oard.
MT 3334HD8 User Guid e 56 CommPlete Communic ations Se rver 2. Open your communications s oftware and g o into terminal mode. Type AT and press E NTER ; you should get an OK message. Type AT&E0<C R> to disab le error correction. 3. Dial the remote modem and establish your online connection.
5 Testin g the M T 3334HD8 CommPlete Communic ations Se rver 57 Local Digit al Loopback T est (V .54 Loop 2) This test is identica l to the remote digital loopba ck test with one exception.
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CommPlete Communic ations Se rver 59 6 W arranty , Service, and T echnical Support.
MT 3334HD8 User Guid e 60 CommPlete Communic ations Se rver Limited W arranty Multi-T ech Syste ms, Inc. ( “ MT S ” ) warra nts that this prod uct will b e free from defects in materia l or workmanship for a period of two years from the date of purcha se, or, if proof of purchase is not prov ided, two years from da te of shipment.
6 Warra nty, S ervice, a nd Technical Support CommPlete Communic ations Se rver 61 T echnical Support Multi-Tec h has a n excellent sta ff of technical s upport personnel a vaila ble to help you get the mos t out of your Mul ti-Te ch product .
MT 3334HD8 User Guid e 62 CommPlete Communic ations Se rver The Multi-T ech BBS Multi-Tech m aintains a bul leti n board system (BBS) fo r its custo mers. Inf ormat ion availabl e from the B BS includes new prod uct information, prod uct upgra de data , and prob lem-solving tips.
6 Warranty, S ervice, and Technic al Support CommPlete Communic ations Se rver 63 6. Select a file trans fer protocol by typing the indica ted letter, such a s Z for Zmodem (the recommended protocol). 7. If you selec t Zmodem, the file wi ll transfer a utomatica lly.
MT 3334HD8 User Guid e 64 CommPlete Communic ations Se rver A bout the Internet Multi-Tech is a commercial provid er on the Internet, and w e retrieve e-ma il messag es from the following mailbo xes on a pe riodic basis: tsupport@multitech.com Technical Support mtsmktg@multitec h.
6 Warranty, S ervice, and Technic al Support CommPlete Communic ations Se rver 65 Upgradin g the MT3334HD8 F irmw are The MT3334H D8 ’ s firm ware is cont ained in a f lash PROM. At various ti mes, Mult i-Tech may add enhance ment s and/or f ixes t o thi s fir mware.
MT 3334HD8 User Guid e 66 CommPlete Communic ations Se rver.
CommPlete Communic ations Se rver 67 Appendixes.
MT 3334HD8 User Guid e 68 CommPlete Communic ations Se rver Appendix A ASCII Conversion Chart CTRL CODE HEX DEC CODE HEX DEC CODE HEX DE C CODE HEX DE C @ NUL 00 0 SP 20 32 @ 40 64 ` 60 96 A SOH 01 1 .
B Dial Pulses and T ones CommPlete Communic ations Se rver 69 Appendix B Dial Pulses and T ones Dial Pulses When you p ulse di al, as when y ou make a cal l wit h a rot ary dial tel ephone , your t elep hone or mode m generates cod es in the form of pulses tha t simulate the opening and clos ing of old-fa shioned electric relays, or switches.
MT 3334HD8 User Guid e 70 CommPlete Communic ations Se rver Figure B -2. Standar d DTMF fre quencie s The ex tended DT MF character s (A, B, C, D) are the hi gh-end fr equenci es (1633 Hz) defi ned on som e telephone sets with a fourth vertical column of bu ttons.
C Result Code Summary CommPlete Communic ations Se rver 71 Appendix C Result Code Summary Multi-T ech Result Codes (&Q0) Terse Verbose Definition 0O K Command was ex ecuted without error; ready for nex t command. 1 CONNECT Modem has detected carrier and gone online.
MT 3334HD8 User Guid e 72 CommPlete Communic ations Se rver LAP-M Reliable Mode. If the modem conn ects us ing LAP-M error correction, the word LAPM or letter L is added to the CONNECT response s as f.
D S-Register Summary CommPlete Communic ations Se rver 73 Appendix D S-Register Summary Register Unit Range Default Description S0 1 ring 0, 1–255 1 Sets the number of rings until the modem answers. ATS0 =0 disables auto answer completely. S1 1 ring 0–255 0 Counts the rings that have occurred.
MT 3334HD8 User Guid e 74 CommPlete Communic ations Se rver Register Unit Range Default Description S43 decimal 33, 31, 28, 26, 24, 21, 19, 16, 14, 12, 96, or 48 0 Sets fixed V.34 connect speed. 28 = 28800 bps; 26 = 26400 bps;. . . 48 = 4800 bps. 0 default disables this feature.
E AT Command Summary CommPlete Communic ations Se rver 75 Appendix E A T Command Summary Command Values Description AT n/a Attention Code The attention code precedes all command lines except A/ , A: and escape codes. RETURN n/a RETURN Key Press the RETURN (ENTER) key to execute mos t commands.
MT 3334HD8 User Guid e 76 CommPlete Communic ations Se rver Command Values Description $BA n n = 0 or 1 Baud Adjust *** $B A0 Set baud adjust off, speed conversion on. (Serial port speed is independent of modem data rate.) $BA1 Set baud adjust on, speed conversion off.
E AT Command Summary CommPlete Communic ations Se rver 77 Command Values Description >DT n n = 0 or 1 DTMF De tection *** >DT0 Disable DTMF detection. >DT1 Enable DTM F detection when off-hook. E n n = 0 or 1 Echo Command Mode Characters E 0 Do not echo command mode characters.
MT 3334HD8 User Guid e 78 CommPlete Communic ations Se rver Command Values Description %E n n = 0–5 Escape Sequence Options %E0 Modem won’t escape. *** %E1 +++ method %E2 Break method. %E3 Either +++ or break methods. *** %E4 No OK response to +++.
E AT Command Summary CommPlete Communic ations Se rver 79 Command Values Description I n n = 0, 1, 2, Inquire Product Codes or 5 I 0 Request modem ID #. I1 Request firmware rev ision #. I2 Request modem description. I5 Request DSP version. #I x x = password Enter Login Passw ord Password is case sensitiv e.
MT 3334HD8 User Guid e 80 CommPlete Communic ations Se rver Command Values Description $MB n n = speed Modem Baud Rate $MB75 Select ITU-T V.23 mode. $MB300 Select 300 bps on line. $MB1200 Select 1200 bps on line. $MB2400 Select 2400 bps on line. $MB4800 Select 4800 bps on line.
E AT Command Summary CommPlete Communic ations Se rver 81 Command Values Description &R n n = 0, 1, or 2 Clear to Send Control &R0 Let CTS state follow RTS state w hen online. *** &R1 Force CTS high (on). &R2 Let CTS drop on disconnect for time set by S24, then go high again.
MT 3334HD8 User Guid e 82 CommPlete Communic ations Se rver Command Values Description &SF n n = 0 or 1 DSR/CD Interac tion Control *** &SF0 Select DSR to follow CD. &SF1 Select D SR to be independent. $SB n n = speed Serial Port Baud Rate Baud Adjust $SB300 Select 300 bps at serial port.
E AT Command Summary CommPlete Communic ations Se rver 83 Command Values Description #V n n = 0 or 1 V.32terbo Handshake *** #V0 Enable V.32terbo tones in answer mode. #V1 Disable V.32terbo tones in answer mode. W In dialing Wait for New Dial Tone command Causes modem to w ait for new dial tone.
MT 3334HD8 User Guid e 84 CommPlete Communic ations Se rver Command Values Description ; At end of dial command Return to Command Mode After Dialing Semi-colon; causes immediate return to command mode after dialing. ! In dial command Flash On-Hook Exclamation; causes modem to flash on-hook.
F Remote Configuration CommPlete Communic ations Se rver 85 Appendix F Remote Configuration Introduction Remo te conf igurati on, a fe ature o f Multi -Tech ’ s MT 3334HD8 modem s, is a ne twork managem ent t ool t hat allows yo u to configur e modem s anywhere in yo ur networ k from one lo cation.
MT 3334HD8 User Guid e 86 CommPlete Communic ations Se rver Changing the Passw ords 1. Establish a remote configuration link with the remote mod em as desc ribed abov e. 2. Type AT#IMULTI-TECH (or AT#I xxxxxx if you have replaced the MULTI-TECH password with xxxxxx ) and press E NTER .
CommPlete Communic ations Se rver 87 Index.
MT 3334HD8 User Guid e 88 CommPlete Communic ations Se rver A abort t ime r, 12, 19, 47, 51 Answer com mand, 12, 40 answer m ode, 18, 34, 40 Answer Tone com mand, 24 Answerback com mand, 24 answeri ng.
Index CommPlete Communic ations Se rver 89 %E, 39 %F, 28 >DT, 25 *H, 26, 51 ! (exclama tion mark), 18 , (comma), 18, 48 : (colon), 16, 18 ; (semicolon), 18 @, 19 +++AT<CR>, 39 <BREAK >A.
MT 3334HD8 User Guid e 90 CommPlete Communic ations Se rver busy-in time , 50 busy-out tim e, 50 control of, 29 disconnect drop ti me, 49 E Echo Canceler Frequency Offset Compensation comma nd, 28 Ech.
Index CommPlete Communic ations Se rver 91 O On-Hook/Off-Hook command, 1 6 onlin e connect ion com mands, 24 onli ne mode , 12, 40, 46, 54, 56 origi nate m ode, 18, 34, 54 origi natin g a call, 31, 34.
MT 3334HD8 User Guid e 92 CommPlete Communic ations Se rver S48, 50 S94, 26, 51 start bit, 3 7 stop bi t, 37 Store Configur atio n comm and, 20, 21, 22, 52 Store Phone Number co mmand, 19, 20 stori ng.
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P/N 82063701.
An important point after buying a device Multitech MT3334HD8 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Multitech MT3334HD8 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Multitech MT3334HD8 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Multitech MT3334HD8 you will learn all the available features of the product, as well as information on its operation. The information that you get Multitech MT3334HD8 will certainly help you make a decision on the purchase.
If you already are a holder of Multitech MT3334HD8, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Multitech MT3334HD8.
However, one of the most important roles played by the user manual is to help in solving problems with Multitech MT3334HD8. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Multitech MT3334HD8 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
