Instruction/ maintenance manual of the product MTA128ST-USB AC International
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Model MT A128ST -USB External ISDN T erminal Adapter User Guide.
User Guide Model MT A128ST -USB P/N 8831 1703 Revision D Copyright ©1999, by Multi-T ech Systems, Inc. All rights reserved. This publication may not be reproduced, in whole or in part, without prior expressed written permission from Multi-T ech Systems, Inc.
iii Contents Chapter 1 - Introduction and Description Introduction ................................................................................................................... .............................. 6 Product Description ...............
Channel Bundling Flag Dialing .................................................................................................. ........... 7 2 Canceling a Call .........................................................................................
Chapter 1 - Introduction and Description.
6 MultiModemISDN User Guide Introduction Welcome to the world of data communications. Y ou have acquired one of the finest ISDN terminal adapters (T A) available today from one of America’ s oldest and most respected modem manufacturers: Multi-T ech Systems, Inc.
7 Chapter 1 - Introduction and Description Manual Organization This manual is divided into six chapters and two appendixes: Chapter 1: Introduction and Description —Summarizes product features, lists technical specifications, and provides an overview of the manual’ s organization.
8 MultiModemISDN User Guide Features The MT A128ST -USB communicates over public ISDN telephone lines. Features include: • Compatibility with EuroISDN (ETSI/DSS1/NET3), French VN4, and Japanese INS6.
9 Chapter 1 - Introduction and Description T echnical Specifications Y our MT A128ST -USB terminal adapter meets the following specifications: T rade Name MultiModemISDN Model Number MT A128ST -USB (International) Network Interface Four-wire S/T interface Switch Compatibility EuroISDN (ETSI/DSS1/NET3), VN4, INS64, U.
Chapter 2 - Hardware Installation.
11 Chapter 2 - Hardware Installation Introduction This chapter details the contents of the MT A128ST -USB shipping container , describes each cable connection, and describes the LED indicators.
12 MultiModem ISDN User Guide Assembling the MT A128ST -USB The only assembly required is to mount the feet on the bottom of your unit (See Figure 2-2). Peel the four self-adhesive plastic feet off the backing strip and press them into the recesses on the bottom of the MT A128ST -USB.
13 Chapter 2 - Hardware Installation Connecting to Y our Computer 1. Plug the 4-pin flat end (T ype A) into a USB port connector on your computer or laptop. Note: Do NOT plug the D-shaped end (T ype B) of the USB cable into the USB connector on the back panel of the MT A128ST -USB at this time.
14 MultiModem ISDN User Guide LED Indicators The ten LED indicators on the front panel (see Figure 2-4) of the MT A128ST -USB report status and line activity . TD RD LS B1 B2 TR OH 128 P1 P2 USB ISDN Modem with Analog Port Figure 2-4: Front Panel TD T ransmit Data Flashes when data is being transmitted (on for a space, off for a mark).
15 Chapter 2 - Hardware Installation P1 Data Protocol Lights in combination with P2 and 128 LEDs to indicate which data protocol (V .1 10 [build MT A128ST-USB only] , V .120, X.75, PPP , MLPPP) is in use as shown in the table below . P2 Data Protocol Lights in combination with P1 and 128 LEDs to indicate which data protocol (V .
Chapter 3 - Software Installation and Configuration.
17 Chapter 3 - Software Installation and Configuration Introduction This chapter describes how to install the MT A128ST -USB driver software and discusses how to configure the unit to match your ISDN service and remote terminal adapter (T A).
18 MultiModemISDN User Guide 6. The Locate Driver Files dialog box displays. V erify that the “ Floppy disk drives ” option is selected and click Next > . 7. If the Digital Signature Not Found dialog box displays, click Ye s to continue. 8. The Found New Hardware Wizard asking you to insert the installation diskette displays.
19 Chapter 3 - Software Installation and Configuration 9. The Driver Files Search Results dialog box displays. Windows indicates it has found the device drivers and is ready to copy them to your computer . Click Next > . 1 0. Windows copies the files to your computer and then displays the Completing the Found New Hardware Wizard dialog box.
20 MultiModemISDN User Guide Changing the Modem Descriptor (Windows 2000) The following procedure describes how you can change the description of the terminal adapter . The default descriptor is MT A128ST -USB CDC ML-PPP . Note : If you need assistance, contact Multi-T ech s T echnical Suppor t gr oup.
21 Chapter 3 - Software Installation and Configuration 9. The Install Hardware Device Drivers dialog box displays. Select “ Display a list of the known drivers for this device ... ” and then click Next > . 1 0 . The Install New Modem dialog box displays.
22 MultiModemISDN User Guide 1 2 . If the Digital Signature Not Found screen displays, click Ye s to continue the installation. 13.The Completing the Upgrade Device Driver W izard dialog box displays. Click Finish . 1 4 . The Properties dialog box displays.
23 Chapter 3 - Software Installation and Configuration 5. The Add New Hardware W izard dialog box displays. V erify that the “ Search for the best driver for your device. (Recommended) ” option is selected and click Next > . 6. The Add New Hardware W izard dialog box displays.
24 MultiModemISDN User Guide 8. Windows proceeds to copy the files to the system and then displays the Add New Hardware Wizard dialog box, indicating that Windows has finished installing the software. Click Finish to complete the installation and exit the wizard.
25 Chapter 3 - Software Installation and Configuration Changing the Modem Descriptor (Windows 98) The following procedure describes how you can change the description of the terminal adapter . The default descriptor is MT A128ST -USB ML-PPP . Note : If you need assistance, contact Multi-T ech s T echnical Support group.
26 MultiModemISDN User Guide 8. The Update Device Driver W izard dialog box displays. Select “ Display a list of all the drivers in a specific location, ... ” and then click Next > . 9. The Upgrade Device Driver W izard dialog box displays. Select the appropriate descriptor (e.
27 Chapter 3 - Software Installation and Configuration 1 1 . The Update Device Driver Wizard dialog box displays indicating that it is ready to install the selected driver .
28 MultiModemISDN User Guide Installing in Windows 95 Only certain versions of Windows 95 (OSR2.1, Revision C) offer support for USB peripherals. If you are unsure if your Windows 95 system supports USB, a free USB evaluation utility is available from the Shopping Bag page at http://www .
29 Chapter 3 - Software Installation and Configuration Configuration Run the ISDN MT A128ST -USB configuration utility for North American customized ISDN settings. Note : For Europe, run the configuration utility to customize the settings of the terminal adapter such as configuring Multiple Subscriber Numbers (MSNs).
30 MultiModemISDN User Guide Data MSN ___________________________________ The Data MSN (Multiple Subscriber Number) allows a caller to specify an individual MT A128ST -USB when more than one unit is connected to your network terminator . If you don ’ t assign a value to the MSN, the unit accepts all incoming calls.
31 Chapter 3 - Software Installation and Configuration Data Protocol ________________________________ The data protocol, also known as the B-channel protocol and the rate adaption protocol, is the language spoken over each 64 Kbps channel between two ISDN devices.
32 MultiModemISDN User Guide ISDN MT A128ST -USB Configuration Utility Use the ISDN MT A128ST -USB Configuration Utility with computers running W indows 2000/98/95 operating systems only . Because it is a software utility , you can use it to create and store as many different configurations as you wish.
33 Chapter 3 - Software Installation and Configuration Windows 2000 Dial-Up Networking The following instructions describe all Dial-Up Networking connection options under Windows 2000 as well as guide you through setting up a Dial-up Networking connection to an Internet Service Provider (ISP).
34 MultiModemISDN User Guide The process for completing your Dial-Up Networking connection will vary based on the connection type selected in the previous step. If you select Dial-up to private network and have only one modem installed: a . The Phone Number to Dial dialog box is displayed.
35 Chapter 3 - Software Installation and Configuration f . The Step 2 of 3: Internet account logon information dialog box is displayed. Enter the user name and password you will use for your Internet account. Click Next> . g . The Step 3 of 3: Configuring your computer dialog box is displayed.
36 MultiModemISDN User Guide The Allowed Users dialog box is displayed. Select the check box next to the name of each user you want to allow to connect to this computer . Click Next> . c. If you select Guest , the Select a Device dialog box is displayed.
37 Chapter 3 - Software Installation and Configuration Windows 98/95 Dial-Up Networking Windows 98/95 includes a remote-node client called Dial-Up Networking (DUN). Before beginning, make certain Dial-Up Networking and TCP/IP are installed on your computer .
38 MultiModemISDN User Guide 5 . The Make New Connection dialog box displays indicating you have created a new Dial-Up connection. Click Finish . 6 . From the Dial-Up Networking folder , right click on the Dial-Up Connection just created and select Properties to open the Modem Properties dialog box.
39 Chapter 3 - Software Installation and Configuration 9 . The TCP/IP Settings dialog box displays. If your ISP provided you with an IP address for your computer , select Specify an IP address and enter the static address in the box provided.
Chapter 4 - A T Commands, S-Registers and Result Codes.
41 Chapter 4 - A T Commands, S-Registers, and Result Codes Introduction One of the ways you can communicate with and configure your MT A128ST -USB is to use A T commands. A T commands are so-called because, with only a few exceptions, each command string begins with the characters AT .
42 MultiModemISDN User Guide A T Commands by Function Command Implementation A T Attention code Return Command execution +++A T<cr> In-band escape code <break>A T<cr> Out-of-band esc.
43 Chapter 4 - A T Commands, S-Registers, and Result Codes Data Call Commands A Answer D Dial DS n Dial Stored telephone number &J n Channel Bundling H Hang up In Display product information O n R.
44 MultiModemISDN User Guide Switch Configuration Commands Use the following commands to select your network switch type (e.g., EuroISDN Net3) and to specify other information required to make an ISDN connection.
45 Chapter 4 - A T Commands, S-Registers, and Result Codes Command: !D3=n Function: SAPI-0 Data TEI V alues: n = 0 – 63, 240 (auto), 241 (disable) Default: !D3=240 (Auto TEI) Description: Use !D3= to set the terminal endpoint identifier (TEI) for the data channel.
46 MultiModemISDN User Guide Command: !EN=n Function: Enable Data DN/MSN V alues: n = 1 or 2 Default: All ports are enabled. Description: !ENn enables a Data DN/MSN which will put it back in service for accepting and originating data calls.
47 Chapter 4 - A T Commands, S-Registers, and Result Codes Command: !N2=n Function: Data DN/MSN 2 V alues: n=25-character string Default: Null string Description: Data DN/MSN 2 accommodates the functionality for handling acceptance of incoming data. Data DN/MSN 2 can be set to the same value as the V oice DN/MSN or Data DN/MSN 1.
48 MultiModemISDN User Guide !Z=6 V .1 10 protocol* !Z=9 ML-PPP protocol !Z=12 X.75 protocol * The MT A128ST -USB is manufactur ed in two builds. T o determine the build of your terminal adapter (T A), issue the A TI2 command in a terminal window . If the T A responds to the command with MT A128ST - USB , then it supports V .
49 Chapter 4 - A T Commands, S-Registers, and Result Codes Command: Sr=n Function: Set Register V alue V alues: r = S-register number; n varies Default: None Description: Use Sr=n to set value of an S-register , where r is the number of the S- register , and n is the value you want to set.
50 MultiModemISDN User Guide result is the same as turning the modem off and on. When you enter AT Z , the state of the &W command determines where the default values originate. The &W0 defaults come from the customized configuration in NVRAM, and &W1 defaults come from the factory default configuration in ROM.
51 Chapter 4 - A T Commands, S-Registers, and Result Codes &D4 Ignores DTR when answering a data call. If DTR is low when an incoming data call is present, the T A will answer the call.
52 MultiModemISDN User Guide Command: &Fn Function: Load Quick Setup Profile V alues: n = 0 – 4 Default: &F0 Description: For quick setup, the T A includes six Quick Setup Profiles, each contains configuration parameters for a specific type of port operation.
53 Chapter 4 - A T Commands, S-Registers, and Result Codes Description: Controls state of DSR (Data Set Ready) signal on RS232E/V .24 nterface. A high DSR signal indicates to the computer that T A is ready to transmit data. &S0 DSR is always high.
54 MultiModemISDN User Guide Command: $MBn Function: V .1 10 Network Rate* V alues: n = 600, 1200, 2400, 4800, 9600, 19200, 38400 Defa ult: $MB38400 Description: If S77=1, then the network rate of the V .1 10 connection will match that of $MB (S76). If a V .
55 Chapter 4 - A T Commands, S-Registers, and Result Codes Command: DSn Function: Dialing a Stored T elephone Number V alues: n = 0 – 9 Default: n = 0 Description: T o dial a stored telephone number , type &DSn in terminal mode, where n is the location of the number you want to dial.
56 MultiModemISDN User Guide S-Registers S-registers are sections of memory in which values are stored that affect how the MT A128ST -USB operates. S-registers are so-called because each has a name that begins with the character S. Use the S command to assign a value or to read the current value of an S-register .
57 Chapter 4 - A T Commands, S-Registers, and Result Codes S7 5 Maximum V .1 10 Buf fer Size S7 6 V .1 10 Network rate S7 7 V .1 10 Network Rate Control S80 Persistent DTR Dialing Delay Note: V .
58 MultiModemISDN User Guide S-Register: S5 Function: Backspace Character Unit: Decimal ASCII code Range: 0 – 32, 127 Default: 8 (^H) Description: Specifies the character used by the T A to delete the previous character in the command line.
59 Chapter 4 - A T Commands, S-Registers, and Result Codes S-register: S30 Function: On-line Inactivity T imer Unit: 1 minute Range: n=0 Does not disconnect n=1 – 255 Default: 0 (does not disconnect) Description: Makes the T A disconnect a data connection if no data is transmitted or received for the specified time.
60 MultiModemISDN User Guide S-Register: S44 Function: POTS Port Ring Frequency Unit: Decimal ASCII code Range: 2 – 4 Default: 2 (25 Hz) Description: Controls the ring frequency from the POTS port. S44=n where: n = 2 25 Hz ring frequency n = 3 20 Hz ring frequency n = 4 16.
61 Chapter 4 - A T Commands, S-Registers, and Result Codes not define a means of conveying Calling Party information to the terminal for ISDN voice calls.
62 MultiModemISDN User Guide n=0 Disable n= 1 Detect n =2 Detect and Select Note: V .1 10 support is available in build MT A128ST -USB only . S-Register: S53 Function: Maximum X.75 Buffer Size Unit: 1 byte Range: n=64 - 2048 Default: 2048 (bytes) Description: S53 allows the maximum buf fer size of an X.
63 Chapter 4 - A T Commands, S-Registers, and Result Codes 6 4 Subscriber 9 6 Abbreviated Numbering Plan 0 Unknown 1 ISDN/telephony 3 Data 4 T elex 8 National standard 9 Private Default: 128 (disabled.
64 MultiModemISDN User Guide S-register: S58 Function: Client-side Authentication Protocol Negotiation Unit: Decimal ASCII code Range: n=1 P AP n = 2 P AP between T A and PC; CHAP MD5 between T A and .
65 Chapter 4 - A T Commands, S-Registers, and Result Codes scheme to drop a channel due to analog calls. Note: Using the DBA scheme on the host-side requires that you specify a Data Directory Number or MSN. Refer to your T A Owner ’ s Manual for information on how to specify a Data Directory Number or MSN.
66 MultiModemISDN User Guide S-register: S63 Function: Bandwidth-on-Demand Low Throughput Threshold Unit: Kbps Range: n= 0 – 64 (Kbps) Default: 26 (26 Kbps) Description: Sets BOD Low Throughput Threshold, which determines whether second channel should be disconnected due to low throughput.
67 Chapter 4 - A T Commands, S-Registers, and Result Codes 3 Austria 4 Belgium 5 Cyprus 6 Denmark 7 Finland 8 France 9 Germany 1 1 0 Germany 2 1 1 Greece 1 2 Iceland 1 3 Ireland 1 4 Italy 1 5 Luxembou.
68 MultiModemISDN User Guide Description: Sets the duration of the first active period of the ring signal. Any value given to this S-register is rounded down to the nearest 5 ms.
69 Chapter 4 - A T Commands, S-Registers, and Result Codes Globally Assigned MAC Address (S73=3) options currently generate a random value similar to the PPP Magic-Number Block, except that the length of the Endpoint Discriminator follows according to the specifications for the respective type.
70 MultiModemISDN User Guide Default: 2 (use $MB(S76) or Auto Sync on Answer) Description: The Network Rate for V .1 10 will be determined by S76 ($MB). If S77=1, then the network rate will be set to that of S76 ($MB) and if the network does not match that of the peer device, then the connection will fail.
71 Chapter 4 - A T Commands, S-Registers, and Result Codes Result Codes When the MT A128ST -USB (T A) receives an A T command from the computer or terminal, it attempts to execute the command, then sends a status message to the computer or terminal that reports the result of the command.
72 MultiModemISDN User Guide Using A T Commands to Operate the MT A128ST -USB Y ou can configure and operate the MT A128ST -USB entirely with A T commands if you like. But remember , you can issue A T commands only from a terminal or from a computer running a communications program in terminal mode.
73 Chapter 4 - A T Commands, S-Registers, and Result Codes Note: In W indows 2000 and W indows 98/95, if the Use Country Code and Area Code box is checked in the Properties window for dial-up connection, the bundling modifier (i.e., &, + or !) is r emoved from the dialing string when the user attempts to make a connection.
74 MultiModemISDN User Guide Hanging Up T o hang up a call, escape to online command mode ( +++A T< cr > ), then enter the H command ( A TH< cr > ). The escape sequence and hang up command can be combined into one command string: +++A TH< cr > .
Chapter 5 - T roubleshooting.
76 MultiModemISDN User Guide Introduction This chapter describes basic problems you may run into with your MT A128ST -USB and how to solve them. Y our MT A128ST -USB was thoroughly tested at the factory before it was shipped.
77 Chapter 5 - T roubleshooting the MT A128ST -USB from the DOS prompt.) • Make sure you are in terminal mode in your data communications program. Then type AT and press ENTER. If you get an OK response, your connections are good and the problem may be in your phonebook entry or session settings.
78 MultiModemISDN User Guide • No terminal adapter at the other end. • A faulty communications device, computer , or software at the other end. • Incompatibility between communications devices. • An improperly configured MT A128ST -USB. Narrow the list of possibilities by using extended result codes.
79 Chapter 5 - T roubleshooting The MT A128ST -USB disconnects while online • Check for loose connections between the MT A128ST -USB and the computer , the ISDN jack, and AC power . • The problem may have originated at the other end of the line. T ry again.
80 MultiModemISDN User Guide sending terminal adapter , then the packet size can be greater than 1024, and Zmodem transfers the data without bad packet errors. Note: The MT A128ST -USB is manufactur ed in two builds. T o determine the build of your terminal adapter (T A), issue the A TI2 command in a terminal window .
Chapter 6 - W arranty , Service, and T echnical Support.
82 MultiModem ISDN User Guide Introduction This chapter begins your MT A128ST -USB ’ s five-year warranty . If you have questions or problems with your unit carefully read the next section, T echnical Support . It includes the technical support telephone numbers and information on how to send in your terminal adapter should you require service.
83 Chapter 6 - W arranty , Service and T ech Support Please direct your questions regarding technical matters, product configuration, verification that the product is defective, etc., to our T echnical Support department nearest you. When calling the U.
84 MultiModem ISDN User Guide original for backup or archival purposes. Customer shall NOT copy, or translate into any language, in whole or in part, any documentation which is provided by MTS in printed form under this Agreement. 3. OTHER RESTRICTIONS.
85 Chapter 6 - W arranty , Service and T ech Support T echnical Support Multi-T ech provides free technical support for as long as your product remains in service. Before calling T echnical Support, please complete the Recording Modem Information section below .
86 MultiModem ISDN User Guide Ordering Accessories SupplyNet, Inc. supplies replacement transformers, cables and connectors for select Multi-T ech products. Y ou can place an order with SupplyNet via mail, phone, fax or the Internet at: Mail: SupplyNet, Inc.
87 Chapter 6 - W arranty , Service and T ech Support Upgrading the MT A128ST -USB with FlashWizard The MT A128ST -USB has a flash PROM, which contains firmware code for the hardware. At various times, Multi-T ech may add enhancements and/or fixes to the firmware.
Appendixes.
89 Appendixes Appendix A: Regulatory Compliance Class B Statement FCC Part 15 This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
90 MultiVOIP 200 User Guide Appendix B: Configuration Profiles Quick Setup Factory Profiles For quick setup, the MT A128ST -USB includes six Quick Setup Factory Profiles, each of which is configured for a specific type of port operation.
91 Appendixes S0=1 Answer after 1 ring S2=43 Se t escape character to + (ASCII 43) S3=13 Se t c a rriage return character to CR (ASCII 13) S4=10 Set line feed character to LF (ASCII 10) S5=8 Set backs.
92 MultiModemISDN User Guide S53=2048 M aximum X.75 buffer size is 2048 characters &S1 DSR follows DCD V 1 Select verbose messages !Z=6 Enable V .1 10 data protocol Profile 2 (&F2 ) — V .
93 Appendixes & R1 CTS always high S0=1 Answer after 1 ring S2=43 Se t escape character to + (ASCII 43) S3=13 Se t c a rriage return character to CR (ASCII 13) S4=10 Set line feed character to LF .
Glossary.
95 Glossary Symbol 2B1Q (2 bits, 1 quarternary) — A line code at layer one for the BRI U interface. Two bits of data (2B) are mapped into one of four line values (1Q, or 1quarternary). This coding scheme allows a single copper pair to carry 160 Kbps of information bidirectionally and simultaneously at a distance of up to three miles.
96 MultiModemISDN User Guide BONDING Specification 1.1— The Version 1.1 BONDING specification (September 1993) incorporates changes to the 1.0 specification resulting from interworking tests among various vendors, and comments from the TIA standardization process.
97 Glossary device address : the address of a device on the Universal Serial Bus. The Device Address is the Default Address when the Universal Serial Bus device is first powered or reset. Hubs and functions are assigned a unique Device Address by Universal Serial Bus software.
98 MultiModemISDN User Guide hexadecimal — A base 16 numbering system in which one character represents a four-bit binary value. Hexadecimal notation uses the numbers 0 – 9 and the letters A – F, usually suffixed by an h (e.g., 4CF h). Host Controller : The host ’ s Universal Serial Bus interface.
99 Glossary MSN (Multiple Subscriber Number) - Allows a caller to specify an individual terminal adapter when more than one unit is connected to your network terminator.
100 MultiModemISDN User Guide packet mode — The switching of chunks of information for different users using statistical multiplexing to send them over the same transmission facility. ISDN packet mode capabilities are based on the ITU-TSS Recommendation X.
101 Glossary signaling — The process of establishing, maintaining, accounting for, and terminating a connection between two endpoints (e.g., the user premises and the telco CO). Central office signals to the user premises can include ringing, dial tone, speech signals, etc.
102 MultiModemISDN User Guide terminal — The screen and keyboard device used in a mainframe environment for interactive data entry. Terminals have no box , which is to say they have no file storage or processing capabilities. terminal adapter (TA) — An ISDN DTE device for connecting a non-ISDN terminal device to the ISDN network.
103 Glossary V.120 — One of the terminal rate adaptation protocols for the ISDN B-channel. V.120 is more software-intensive than the V.110 B-channel standard. Videotex — A two-way information-retrieval service that can be accessed by terminals and by a TV set (with installed decoder).
Index.
105 Index Index A Abort timer ...................................................... 5 8 Answering a call .............................................. 5 4 Automatically ............................................... 7 3 Manually ...................
106 MultiModemISDN User Guide Flow control .................................................. 5 1 Hang up ................................................. 5 5 , 7 4 Hook control ................................................. 5 5 List Active Profile .
107 Index I Initialization strings .......................................... 7 8 Installation, driver software Windows 2000 .............................................. 1 7 Windows 95 .................................................. 2 8 Windows 98 .
108 MultiModemISDN User Guide T erse/verbose command .............................. 4 9 Rings Count ........................................................... 5 7 Number before answering ............................. 5 7 Rings to answer option ......
An important point after buying a device AC International MTA128ST-USB (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought AC International MTA128ST-USB 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 AC International MTA128ST-USB - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, AC International MTA128ST-USB you will learn all the available features of the product, as well as information on its operation. The information that you get AC International MTA128ST-USB will certainly help you make a decision on the purchase.
If you already are a holder of AC International MTA128ST-USB, 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 AC International MTA128ST-USB.
However, one of the most important roles played by the user manual is to help in solving problems with AC International MTA128ST-USB. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device AC International MTA128ST-USB 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
