Multi Tech Equipment MT5634ZBA-V-V92 Modem Cannot Connect When Answering, Data Is Being Lost

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MultiModemZBA-V-V92 User Guide

8 Solving Problems

 

 

The Modem Cannot Connect When Answering

ÖThe default DTR Control command (&D2) inhibits autoanswer. To enable autoanswer, change DTR Control to &D0, and make sure &Q0, &Q5, or &Q6 is also set. For more information, see the &D command in Chapter 4. For information on changing the modem’s default configuration, see “Step 6: Install and Configure Your Software” in Chapter 2.

ÖAutoanswer might be disabled. Turn on autoanswer in your communications program or send the command ATS0=1 (ATS0=2 if you have Caller ID service) to your modem in terminal mode.

File Transfer Is Slower Than It Should Be

ÖIf you are using a slow transfer protocol, such as Xmodem, try Zmodem or Ymodem/G instead.

ÖIs your line noisy? If there is static on your line, the modem has to resend many blocks of data to insure accuracy. You must have a clean line for maximum speed.

ÖAre you downloading a compressed file with MNP 5 hardware compression enabled? Since hardware data compression cannot compress a file already compressed by an archiving program, the transfer can be marginally slower with data compression enabled than with it disabled.

ÖDoes your Internet service provider (ISP) use the same 56K protocol as your modem? The default setting of your modem is to connect using either the V.92 or the V.90 protocol, depending on which one the ISP’s modem is using. If your ISP uses the V.90 protocol, the maximum speed you will be able to upload at is 33,600 bps. Check with your ISP to see which protocols it supports.

ÖAre you trying to send a file to another client modem? If so, then your maximum possible connect speed is 33,600 bps. You can upload at speeds up to 48,000 bps only when connected to an ISP that supports the V.92 protocol.

ÖTry entering the I11 command in online mode or the &V command in command mode to display information about the last connection, making a screen print of the connection statistics, and checking for parameters that might be unacceptable.

Data Is Being Lost

ÖIf you are using data compression and a high speed serial port, set the serial port baud rate to two to six times the data rate.

ÖMake sure the flow control method you selected in software matches the method selected in the modem. If you are using the modem with a Macintosh, you might have the wrong cable for hardware flow control.

ÖTry entering the I11 command in online mode or the &V command in command mode to display information about the last connection, making a screen print of the connection statistics, and checking for parameters that might be unacceptable.

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Contents MT5634ZBA-V-V92 Record of Revisions Table of Contents AT Commands, S-Registers, and Result Codes Introduction Upgrade Overview Chapter Introduction MultiModemZBA-V-V92 User Guide Introduction Product DescriptionYou Supply We SupplyChapter Installation Safety Warnings MultiModemZBA-V-V92 User Guide InstallationMount the Feet Opening the Modem Change the Internal JumpersChanging the Voice Jumper MultiModemZBA-V-V92 User Guide2 InstallationLocation of the Jumpers Changing the Dial-Up/Leased-Line JumpersConnect the Modem to the Telephone Line Connect the Two-Wire Leased LineConnect the Modem to Your System Connect the Modem to You PCConnect the Microphone Connect the Modem to the AC Power OutletConnect the Modem to a Phone Optional Connect a Microphone and/or Speakers OptionalSurge Protectors and Lightning Install the Modem DriverPower-On Test Installing the Modem DriverClick Initial Setup and Country Selection Configure the Modem for Your CountryUsing the Global Wizard to Configure Your Modem Using AT Commands to Configure Your ModemInstall and Configure Your Software Chapter Operation MultiModemZBA-V-V92 User Guide Operation Front PanelPhoneTools Features Configuring the ModemLeased Line Operation SetupOperation Connecting to the InternetSending a Fax Dial-Up NetworkingChapter ATCommands,S-Registers,and ResultCodes Answer AT CommandsRepeat Last Command Communication Standard SettingEcho Online Data Characters Echo Command Mode CharactersNumber ATDT1028806127853500$123456789 DS=n Dial Stored Telephone NumberModulation Handshake Monitor Speaker ModeReturn Online to Data Mode Result Codes Enable/DisableResult Code Options Modem ResetTone Dialing Result Code FormatXON/XOFF Pacing Control Load Factory SettingsAsynchronous Communications Mode Data Terminal Ready DTR ControlStore Dialing Command Test CommandsDisplay Current Settings Store Current Configuration\Kn Break Control \Bn Transmit Break\V n Protocol Result Code \Nn Error Correction Mode Selection\Tn Inactivity Timer \Qn Flow Control SelectionView Numbers in Blacklist Adaptive Answer Result Code EnableDC n AT Command Control Data Calling Tone$Dn DTR Dialing Direct Connect EnableCisco Configuration Command Speed ResponseCommand +DCS=x,y Select V.44 Data Compression Command +DS44=n V.44 Data CompressionData Compression Reporting Subparameters Enable Synchronous Buffered ModeMod Modulation SelectionMod value Valid maxrate values bps Command +PCW= n Call Waiting EnableModem Hook Flash Modem on Hold EnableCommand +PMHR=n Modem on Hold Initiate PCM Upstream IgnoreCommand +PMHT=n Modem on Hold Timer Quick Connect ControlS109 Callback Attempts Command +VCID=n Caller ID SelectionCommand +VDR=x, y Distinctive Ring Report Command #CBDn Callback DelayCommand #CBNy=x Store Callback Password Command #CBF? Callback Failed Attempts DisplayCommand #CBFR Callback Failed Attempts Reset #CBIn Local Callback Inactivity TimerCommand %%%ATCR Remote Configuration Escape Sequence #Sx Enter Setup Password#S=x Store Setup Password Command +++ATCR Escape SequenceRegisters Value Rate S38S108 S42S48 S89Terse Verbose Description Result CodesBlacklist Full Remote Configuration MultiModemZBA-V-V92 User Guide Remote Configuration Basic ProcedureSetup To Change the Setup PasswordTo Change the Remote Escape Character Callback Security MultiModemZBA-V-V92 User Guide Callback Security CallbackSecurityTo Set the Parity of the Callback Security Messages To Turn Callback Security On and OffTo Assign Callback Passwords and Phone Numbers Number-Entry Callback Calling ProceduresPassword-Only Callback PasswordExtension-Entry Callback Command #CBD n Callback Delay Callback Security CommandsCommand #CBIn Local Callback Inactivity Timer #S= x Store Setup Password #S x Enter Setup PasswordDT, or DP. Example AT&Z0=+-ATM0D5551212,??? Command &Zy=+-x,???Store Dialing CommandMultiModemZBA-V-V92 User Guide6 Callback Security Callback Assignments FormModem on Hold Operation What Is Modem on Hold? Modem on Hold ProgramMultiModemZBA-V-V92 User Guide Modem on Hold Operation Enable Caller ID Modem on Hold SettingsDisable Modem on Hold Enable Modem on HoldCheck Modem Status About MTMohExit MTMoh Answering a Voice Call Using Modem on HoldResuming a Data Call Solving Problems MultiModemZBA-V-V92 User Guide Solving Problems None of the Indicators LightModem Does Not Respond to Commands Modem Cannot Connect When Dialing Modem Disconnects While Online Modem Cannot Connect When Answering File Transfer Is Slower Than It Should BeData Is Being Lost There Are Garbage Characters on the Monitor Modem Doesn’t Work with Caller IDFax and Data Software Can’t Run at the Same Time Appendixes MultiModemZBA-V-V92 User Guide Regulatory Compliance FCC Part 68 TelecomFax Branding Statement FCC PartCanadian Limitations Notice Industry CanadaInternational Modem Restrictions New Zealand Telecom Warning Notice EMC, Safety, and R&TTE Directive ComplianceSouth African Notice Intelligent Features MultiModemZBA-V-V92 User Guide Technical SpecificationsError Correction Mode of OperationIndicators Command BufferConnectors DiagnosticsUpgrade Overview IntroductionIdentify the Modem Firmware Clear Your Stored Parameters Download the Upgrade FileExtract the Upgrade Files Identify the Current Firmware VersionRestore Your Parameters Upgrade the Modem’s FirmwareInstallation Using the Terminal Program Minicom to Verify OperationStandard Linux Serial Port Definitions Answering Calls Using the Modem to Call the InternetSelect Dialup Configuration Tool Calling the ISPMultiModemZBA-V-V92 User Guide Connecting to a Cisco Router Connecting to a Cisco Router Console PortConfigure the Modem for your Country Configure for Callback Security in Direct Connect ModeConsole Port Final Setup Cable Pin-outs and Cabling Guide Console Modem Remote ConfigurationSignal RJ-45 pin DB-9 pin DB-25 pin Console Port ConnectionsMultiModemZBA-V-V92 User Guide Connecting to a Cisco Router Multi-Tech Systems, Inc. Warranty & Repairs Policies WarrantyRepair Procedures for U.S. and Canadian Customers Repair Procedures for International Distributors Attn Repairs, Serial # Online Warranty Registration ServiceCanadian Customers International Customers outside U.S.A. and CanadaInternational Distributors Replacement PartsTechnical Support Internet SitesIndex Index MultiModemZBA-V-V92 User Guide Index 103104

MT5634ZBA-V-V92 specifications

The Multi Tech Equipment MT5634ZBA-V-V92 is a versatile and reliable modem designed for various data communication applications. As a part of the MultiTech line of products, this modem is engineered to provide seamless connectivity in both dial-up and broadband environments. Its robust feature set ensures compatibility with a wide array of devices, making it a great choice for businesses and individuals alike.

One of the main features of the MT5634ZBA-V-V92 is its ability to operate at V.92 speeds, allowing for data transmission rates of up to 56 Kbps. This makes it suitable for sending and receiving large amounts of data quickly, a significant advantage for businesses that require efficient communication. The modem is also backward compatible with previous V.90 technologies, ensuring that it can connect with older systems without any issues.

Another notable aspect of the MT5634ZBA-V-V92 is its built-in error correction and data compression capabilities. These technologies significantly enhance data integrity and transmission speed, resulting in fewer dropped connections and faster downloads. The modem uses state-of-the-art compression algorithms to optimize data flow, making it ideal for applications that require reliable and swift data exchange.

In terms of connectivity, the MT5634ZBA-V-V92 supports various interfaces, including RS-232, which allows for easy integration with a wide range of computer systems and other devices. Its flexibility in interfacing options makes it suitable for diverse environments, from industrial applications to home office setups.

The modem's design is also focused on user-friendliness. It comes equipped with LED indicators that provide real-time status updates on power, data transmission, and network connection, allowing users to monitor their connections effortlessly. Additionally, the device includes a simple installation process, which minimizes downtime and helps users get up and running quickly.

The MT5634ZBA-V-V92 is built to last, with a sturdy construction that ensures durability in demanding conditions. Its compact design allows for easy mounting and placement, making it an excellent choice for both stationary and mobile applications.

Overall, the Multi Tech Equipment MT5634ZBA-V-V92 is a powerful modem that merges speed, reliability, and flexibility. With its advanced features and technologies, it stands out as a dependable solution for anyone in need of high-performance data communication. Whether for business or personal use, this modem meets the connectivity needs of today's digital landscape with ease.
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