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Multitech DataTalker DT101 Owner's Manual

Data/voice/fax concentrator
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Data/Voice/Fax Concentrator
Desktop Models: DT101, DT102, DT101/xx, DT102/xx
Rack-Mount Models: DT101R, DT102R, DT101R/xx, DT102R/xx
Owner's Manual

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  • Page 1 Data/Voice/Fax Concentrator Desktop Models: DT101, DT102, DT101/xx, DT102/xx Rack-Mount Models: DT101R, DT102R, DT101R/xx, DT102R/xx Owner’s Manual...
  • Page 2 Furthermore, Multi-Tech Systems, Inc. reserves the right to revise this publication and to make changes from time to time in the content hereof without obligation of Multi-Tech Systems, Inc. to notify any person or organization of such revisions or changes.

  • Page 3: Table Of Contents

    Chapter 1 - Introduction and Description Introduction ... 8 About This Manual ... 8 Product Description ... 10 System Features ... 12 1.4.1 Voice/Fax ... 12 1.4.2 Data Channel ... 12 1.4.3 Composite Link ... 12 1.4.4 Flow Control ... 12 1.4.5 Parameter Memory ...
  • Page 4 Chapter 4 - Unpacking and Configuration Introduction ... 44 Unpacking ... 44 Configuration Summary ... 45 Data Port Configuration Considerations ... 45 Voice/Fax Channel Configuration Considerations ... 46 Composite Link Configuration Considerations ... 47 Configuration Procedure ... 48 Chapter 5 - Installation Introduction ...
  • Page 5 Appendixes Appendix A - ASCII Conversion Chart ... 118 Appendix B - RS-232C Interface Specification ... 119 Appendix C - Cabling Diagrams ... 120 Appendix D - Flow Control Background ... 124 Appendix E - MMH2834 Modem S-Registers ... 125 Appendix F - MMH2834 Modem Commands ...

  • Page 7: Chapter 1 - Introduction And Description

    Chapter 1 - Introduction and Description...

  • Page 8: Introduction

    DataTalker Owner’s Manual 1.1 Introduction Congratulations! Your new Multi-Tech DataTalker™ is one of the finest data/voice/fax concentrators on the market today. The DataTalker optimizes wide area network (WAN) links by simultaneously transmitting voice and/or fax with LAN or computer data over a single phone line, digital service, or ISDN service.
  • Page 9 Chapter 1 - Introduction and Description Chapter 4 - Unpacking and Configuration This chapter describes the contents of the shipping container; provides a customizeable configuration summary; discusses configuration considerations for the data port, voice/fax channel, and the composite link; and provides a detailed configuration procedure. The configuration procedure simplifies the process by asking questions about your application, which allows you to glide through the configuration process by configuring only the items that need to be changed.

  • Page 10: Product Description

    DataTalker Owner’s Manual 1.3 Product Description The DataTalker series of multiplexers has a single synchronous or asynchronous data channel, a command port, one or two voice/fax channels, and a single synchronous composite link with an internal data service unit (DSU), modem, ISDN terminal adapter, or an external synchronous link device.
  • Page 11 To set up the DataTalker for voice or fax operation, connect the VOICE/FAX CHANNEL 1 FXS connector on the back panel to a telephone or fax machine, connect the FXO connector to a PBX station circuit, or connect the E&M connector to a PBX E&M trunk. The FXS (Foreign eXchange Station) circuitry in the DataTalker allows a telephone or fax machine to be directly connected to the DataTalker.

  • Page 12: System Features

    The DataTalker provides three types of telephone circuits (FXS, FXO, and E&M) that allow a telephone, a fax machine, a PBX station card, or a PBX E&M trunk to be directly connected to it. In one configuration, these telephone circuits cause the telephone at a remote location to ring when you pick up the handset on the local telephone.

  • Page 13: Diagnostics

    1.4.6 Diagnostics Diagnostics in a network are of considerable importance. That is why the DataTalker is equipped with several diagnostic modes that will test every aspect of the network. The diagnostics include easy-to-execute tests for the data channel, voice/fax channel, composite link, and various components of the DataTalker unit itself.

  • Page 14: Fcc Regulations For Telephone Line Interconnection

    7. No repairs are to be made by you. Repairs are to be made only by Multi-Tech Systems or its licensees. Unauthorized repairs void registration and warranty.

  • Page 15: Canadian Limitations Notice

    Chapter 1 - Introduction and Description 1.6 Canadian Limitations Notice Notice: The Canadian Department of Communications label identifies certificated equipment. This certification means that the equipment meets certain telecommunications network protective, operational and safety requirements. The department does not guarantee the equipment will operate to the user’s satisfaction.

  • Page 16: Specifications

    DataTalker Owner’s Manual 1.7 Specifications 1.7.1 Async Data Channel Number of Channels Maximum Speed Channel Speed Data Format Parity Local Echo Flow Control Pacing Interface 1.7.2 Sync Data Channel Data Format Channel Speed Protocol Error Correction Interface 1.7.3 System Control (Command Port) Local Access Device Menus...

  • Page 17: Internal Modem

    1.7.5 Internal Modem Modulation ITU-T V.34; AT&T V.32 terbo; ITU-T V.32bis, V.32, V.22bis, V.22; Bell 212A and 103 (North America) or V.23 and V.21 (international) Speeds 300 bps to 33.6K bps Commands Fully AT command compatible Usage Synchronous full duplex over unconditioned 2-wire or 4-wire leased line;...

  • Page 18: Electrical/Physical

    DataTalker Owner’s Manual 1.7.9 Electrical/Physical Desktop Models: Power Supply Input Power Supply Output Power Consumption Dimensions Weight Rack-mount Models: Power Supply Input Frequency Power Consumption Dimensions Weight 100 to 250 VAC +5v@5A, +12v@1A, -12v@0.5A 20 watts 2.3" high x 9" wide x 12.8" deep 5.7 cm high x 22.9 cm wide x 32.7 cm deep 7 pounds (3.2 kg) 100 to 250 VAC...

  • Page 19: Chapter 2 - Configuration

    Chapter 2 - Configuration...

  • Page 20: Introduction

    DT102R/IS Description Any phone or fax machine connected to the PBX at one site can call any phone or fax machine connected to the PBX at the other end. No number must be dialed. If the phone or fax machine on one end goes off hook, the phone or fax machine on the other end rings.

  • Page 21: Configuration 1 - Dial-Up Link

    2.2 Configuration 1 - Dial-Up Link Configuration 1 is a dial-up link using a pair of DataTalkers to provide data communications between a home office PC and the main office host computer and telephone services through the main office telephone system. The data and telephone services are provided using a single line between the home office and the main office.
  • Page 22 DataTalker Owner’s Manual When you established communication, the Main Menu appeared. From the Main Menu you can configure the unit, display statistics, reset various functions within the DataTalker, and run diagnostic tests: Main Menu 1 - Configurations 2 - Statistics 3 - Reset Options 4 - Diagnostics 5 - Exit Command Mode...
  • Page 23 Enter S and press ENTER to store all configurations for the main office. Set up the home office unit the same way, except that you should switch the local and remote interface types (FXS for the local interface and FXO for the remote interface). After you select the home office options, enter S to store all configurations.
  • Page 24 DataTalker Owner’s Manual To connect the home office DataTalker to its PC, connect an RS232C cable between the DATA/ COMMAND connector on the DataTalker and an async port on the PC (typically, COM1 or COM2). Place DIP switch position 3 on the side of the DataTalker in the OPEN (up) position to enable the data channel.

  • Page 25: Configuration 2 - Mmh900 Series With Voice/Fax

    2.3 Configuration 2 - MMH900 Series with Voice/Fax Configuration 2 adds voice capability to an existing data-only network using the same composite link. The example shown in Figure 2-2 had an existing data-only network consisting of a MultiMux MMH904C multiplexer connected to a host computer at the local site and a second MMH904C connected to terminals and/or PCs and a shared printer at the remote site.
  • Page 26 DataTalker Owner’s Manual A series of configuration menus provides simple and complete configuration information for each aspect of the DataTalker. From the Main Menu, you can access menus to configure the unit, display statistics, reset various functions within the DataTalker, and run diagnostic tests: Main Menu 1 - Configurations 2 - Statistics...
  • Page 27 The data port in this configuration will be set up for synchronous operation. To configure the data port for sync operation, enter 1 (Aysnc/Sync) option and change the default Async to Sync. The data port configuration menu displays the sync parameters. Data Port Configuration 1 - Async/Sync: Sync...

  • Page 28: Configuration 3 - Lan To Lan

    DataTalker Owner’s Manual 2.4 Configuration 3 - LAN to LAN Configuration 3 is an example of a pair of DataTalkers providing the link between two LANs with the added benefit of voice or fax traffic over the same composite link. Bridging the LANs over a single high speed composite link expands the capacity of each LAN.
  • Page 29 To configure the DataTalker, enter 1 and press ENTER. The Configurations menu is displayed. From this menu you can configure the data port, voice/fax channel(s), or the composite link. You can also select various factory defaults and store your current configuration: Configurations 1 - Data Port Configuration 2 - Voice/Fax Channel(s) Configuration...
  • Page 30 DataTalker Owner’s Manual Data Port Configuration 1 - Async/Sync: 2 - Speed: 3 - Clocking: 4 - Idle Condition: 5 - NRZ/NRZI Encoding: 6 - CRC Preset: 7 - Inter-frame Timer: S - Store All Configuations M - Main Menu P - Previous Menu Selection : _ Press P to return to the Data Port Configuration menu, enter S to store all configurations, and...
  • Page 31 The DataTalker knows the type of link device being used by the way a DIP switch is set or by detecting a device installed on the main PC board. In this configuration, a 56K bps internal DSU is used for the composite link device, so when the Composite Link Settings menu is displayed, it is for a DSU: C o m p o s i t e L i n k S e t t i n g s - I n t e r n a l D S U 1 - S p e e d :...

  • Page 32: Configuration 4 - Pbx To Pbx

    DataTalker Owner’s Manual 2.5 Configuration 4 - PBX to PBX Configuration 4 is a data/voice/fax configuration that uses two DataTalkers to link two PBXs. Using a single ISDN composite link, they connect a minicomputer and a PBX E&M trunk at the local site to a remote PC on the data part of the network and a second PBX E&M trunk on the voice/fax channel.
  • Page 33 The Configurations menu is displayed. From this menu you can configure the data port, voice/fax channel(s), or the composite link. You can also select various factory defaults and store your current configuration. Configurations 1 - Data Port Configuration 2 - Voice/Fax Channel(s) Configuration 3 - Composite Link Configuration 4 - Factory Default Configuration Options 5 - Configure Remote Unit...
  • Page 34 DataTalker Owner’s Manual Composite Link Settings - Internal TA - On-Line XMT Rate: - Configure TA - DOD/DOI: - Store All Configurations - Main Menu - Previous Menu Selection : _ The terminal adapter menu displays the transmit rate and option 2 allows you to configure the terminal adapter.

  • Page 35: Chapter 3 - Front And Rear Panel Descriptions

    Chapter 3 - Front and Rear Panel Descriptions...

  • Page 36: Introduction

    DataTalker Owner’s Manual 3.1 Introduction This chapter describes the DataTalker front and back panels and switches. The front panel contains LED indicators for the data channel device, voice/fax channels, and the composite link. It also contains one or two switches, depending on whether it is a desktop or rack version. The back panel contains connectors for the data/command device, internal and external composite link devices, and the voice/fax channel devices.
  • Page 37 Chapter 3 - Front and Rear Panel Descriptions Voice/Fax Channels FXS (Foreign Exchange Station) This indicator lights when the voice/fax channel is configured for FXS operation. FXO (Foreign Exchange Office) This indicator lights when the voice/fax channel is configured for FXO operation. E&M (E&M Operation) This indicator lights when the voice/fax channel is configured for E&M operation (voice/fax channel 1 only).
  • Page 38 DataTalker Owner’s Manual 28.8/56 (28.8K bps/56K bps) This composite link speed indicator displays the baud rate of the internal modem (28.8) or DSU (56K). The type of composite link device is indicated by which of the EXT, MDM, DSU, or TA indicators lights. This indicator lights steadily when a DSU is installed.

  • Page 39: Connectors

    Use the FXS (Foreign eXchange Station) connector to connect the DataTalker to an analog station instrument (telephone, fax machine, or key telephone system). The FXS connector is an RJ-11 jack. If a second voice/fax channel is installed, it has an identical connector.

  • Page 40: Voice/Fax Channel 1 E&M Connector

    DataTalker Owner’s Manual 3.3.7 VOICE/FAX CHANNEL 1 E&M Connector Use the E&M connector to connect the DataTalker to the E&M connector on an analog PBX trunk when linking two PBXs together. The E&M connector is an RJ-48 jack. This connector is available on voice/fax channel 1 only.

  • Page 41: Switches And Shunts

    3.4 Switches and Shunts DataTalker switches include one or two switches on the front panel, a power switch on the back panel of the desktop version, and a DIP switch and shunt on the main printed circuit board (Figures 3-3 and 3-4). Power Switch RS-232...

  • Page 42: Dip Switch

    DataTalker Owner’s Manual 3.4.3 DIP Switch The eight-position DIP switch is accessible through a cutout in the left side of the DataTalker series enclosure; its location is shown in Figures 3-3 and 3-4. Position 1: Not used Position 2: OPEN (up) Closed (down) External composite link device selected Position 3: OPEN (up)

  • Page 43: Chapter 4 - Unpacking And Configuration

    Chapter 4 - Unpacking and Configuration...

  • Page 44: Introduction

    DataTalker Owner’s Manual 4.1 Introduction This chapter describes what to expect in your DataTalker shipping box, then describes how to configure the DataTalker. It provides a helpful configuration summary to give you a snapshot of how your unit is set up; summarizes options you should consider when configuring the data channel, router port, voice/fax channel, and composite link;...

  • Page 45: Configuration Summary

    4.3 Configuration Summary The following chart shows possible configurations for your DataTalker. Use it as a snapshot of how your unit is set up. Circle the parameters that apply to your unit. For example, if your unit has the data channel set up for asynchronous communications, circle “Async.” Data Port Optional Port Voice/Fax Channel(s)

  • Page 46: Voice/Fax Channel Configuration Considerations

    DataTalker Owner’s Manual 4.5 Voice/Fax Channel Configuration Considerations When configuring the voice/fax channels on your DataTalker, the first question you should ask yourself is what the voice/fax port is connected to. The possibilities are an in-plant telephone switch, or PBX, (Private Branch eXchange); a PBX E&M trunk; or a telephone. If the voice/fax channel is being connected to a PBX, use the FXO connector.

  • Page 47: Composite Link Configuration Considerations

    4.6 Composite Link Configuration Considerations The composite link configuration depends on the type of device used as the composite link device. The DataTalker knows the type of composite link device being used by the setting of a DIP switch and the sensing of conditions within the unit. In most cases you can use the default composite link configuration.

  • Page 48: Configuration Procedure

    DataTalker Owner’s Manual 4.7 Configuration Procedure Table 4-1. Configuration Procedure Step Procedure Review the configuration considerations for the data port, the voice/fax channel, and the composite link in the previous sections. Place DIP switch position 3 in the down (closed) position to enable the command port. DATA/COMMAND DIAL-UP LEASED...
  • Page 49 Apply power to the terminal or PC. Run your PC communications software in terminal mode. Press the ENTER key twice to establish communications with the DataTalker; the Main Menu then appears: Main Menu 1 - Configurations 2 - Statistics 3 - Reset Options 4 - Diagnostics 5 - Exit Command Mode 6 - QUICK SETUP...
  • Page 50 DataTalker Owner’s Manual Configure the data port to meet the conditions of your installation by selecting option numbers from the menus. Refer to Chapter 6 for a description of the Data Port Configuration menu options. For example, if you are setting up the data port as a sync data channel, enter number 1 and press ENTER.
  • Page 51 12 Configure voice/fax channel 1 to meet the conditions of your installation by selecting option numbers from the menus. • Accept the defaults for the first five options. • Select the local interface type (option 6). • Select the remote interface type (option 11). The remote interface option does not change the interface type on the remote unit;...
  • Page 52 DataTalker Owner’s Manual • Configure the internal MMH2834 modem to meet the conditions of your installation by selecting option numbers from the menus. • If you are setting up DTR dialing, select option 1, Enter AT Commands to 2834. Wait 5 seconds and then enter the following commands (press ENTER after each command): ATDT[Number Modem to Dial]N0 AT$D1 - DTR Dialing command...
  • Page 53 To verify and/or change the terminal adapter’s configuration, select option 2, wait 5 seconds, and enter AT!V to access the terminal adapter’s configuration menu. Refer to the ISDN Terminal Adapter Owner’s Manual for configuration commands. To exit the terminal adapter’s configuration menu, enter CTRL+X;...
  • Page 54 DataTalker Owner’s Manual...

  • Page 55: Chapter 5 - Installation

    Chapter 5 - Installation...

  • Page 56: Introduction

    DataTalker Owner’s Manual 5.1 Introduction This chapter describes how to connect the DataTalker to your system (Table 5-1) and how to move the RS232/V.35 shunt when a V.35 interface is used (Table 5-2). Then it describes how to power on your DataTalker, check that the unit is cabled and configured correctly, and what to do if you run into problems.
  • Page 57 MMH2834 Modem, Leased Line Connect the RJ-11 phone cable supplied with the DataTalker from the internal modem LEASED connector on the back panel to the leased line connection. RJ-11 Phone Cable VOICE/FAX CHANNEL 2 DATA/COMMAND DIAL-UP LEASED DIGITAL E&M RS232C/V.35 EXTERNAL COMPOSITE MODEM DSU/TA...
  • Page 58 Voice/Fax Channel If you are connecting the voice/fax channel to a station device (a normal telephone, a KTS telephone, or a fax machine), connect an RJ-11 phone cable from the VOICE/FAX CHANNEL FXS connector on the DataTalker to the station instrument.
  • Page 59 If you are connecting the voice/fax channel to the station side of a PBX, connect an RJ-11 phone cable from the VOICE/FAX CHANNEL FXO connector on the DataTalker to the station side of the PBX. Refer to the PBX manual for the station side connection. VOICE/FAX CHANNEL 2 DATA/COMMAND E&M...

  • Page 60: Shunt

    DataTalker Owner’s Manual 5.3 V.35 Shunt Table 5-2. V.35 Shunt Procedure Step Procedure Desktop version: Unplug the power supply from the back of the unit. Rack version: Remove the unit from the RackTalker rack. Go to step 4. Desktop version only: Turn the unit upside down and remove the two cabinet mounting screws from the middle of the cabinet.

  • Page 61: Power-On And Checkout

    5.4 Power-On and Checkout The desktop and rack-mounted versions of the DataTalker differ in how power is applied. The desktop version has a power switch that you must turn on. The rack version has no power switch; you apply power by inserting it into a powered-up rack. It is always on as long as the rack is powered up.
  • Page 62 DataTalker Owner’s Manual Verify that the voice/fax channel is connected at the remote site. One of the following conditions will apply depending on how your local and remote sites are set up: • If the local voice/fax channel is connected to a telephone switch in your facility (FXO connection) and the remote site has just a telephone (FXS connection), dial the number of the extension plugged into the FXO jack of the local DataTalker and listen for a ringing at the remote site.
  • Page 63 • The remote DataTalker does not match the remote interface type. See Chapter 4. • The telephone or fax machine is connected to the wrong connector. Verify the cable connection. • The telephone must be an analog phone. Check with your telephone people to ensure that the telephone is not a digital instrument.
  • Page 64 DataTalker Owner’s Manual...

  • Page 65: Chapter 6 - Menus

    Chapter 6 - Menus...

  • Page 66: Introduction

    DataTalker Owner’s Manual 6.1 Introduction The menu system for the DataTalker provides a set of user-friendly configuration menus that are accessible from a main menu. The Main Menu contains five options that allow you to configure your DataTalker, display statistics, reset options, run diagnostic tests, and exit the command mode.

  • Page 67: Data Port Configuration

    6.2.1 Data Port Configuration The Data Port Configuration menu allows you to configure the data channel for either asynchronous or synchronous operation, depending on the type of device connected to the channel. If the port is configured for synchronous operation, refer to Sync Data Port Configuration.
  • Page 68 DataTalker Owner’s Manual The Echo option enables data entered on the channel device keyboard to be returned to the channel device monitor. The purpose of this option is so that an operator will not experience undue delays in seeing entered data appear on their monitor. The default condition for the echo option is off.

  • Page 69: Sync Data Port Configuration

    6.2.2 Sync Data Port Configuration The Data Port Configuration menu allows you to configure the data channel for either asynchronous or synchronous operation, depending on the type of device connected to the channel. When the port is configured for synchronous operation, the following Data Port Configuration menu displays the default parameters: Data Port Configuration 1 - Async/Sync:...

  • Page 70: Voice/Fax Channel Configuration

    DataTalker Owner’s Manual 6.2.3 Voice/Fax Channel Configuration The Voice/Fax Channel Configuration menu is displayed only if the second voice/fax channel card is installed in the DataTalker. If only one voice/fax channel is installed in the DataTalker, this menu does not appear. If you select the Voice/Fax Channel(s) Configuration option from the Configurations menu when you have only one voice/fax channel, the Voice/Fax Channel 1 Configuration menu is displayed: Voice/Fax Channel Configuration...
  • Page 71 The output level attentuation needs to be set at the DataTalker that is receiving (hearing). Increasing the output level gain at the transmitting DataTalker will have no affect on the loudness heard by the person at the receiving DataTalker: DataTalker DataTalker PSTN Talk...
  • Page 72 FXS, FXO, or E&M interface. When the voice/fax channel is connected to a telephone set or fax machine, the local interface type must be FXS. When the voice/fax channel is connected to the station side of a PBX, the local interface type must be FXO. When the voice/fax channel is connected to a PBX E&M trunk, the local interface type must be E&M.

  • Page 73: Composite Link Configuration

    6.2.4 Composite Link Configuration The Composite Link Configuration menu that is displayed depends on whether an internal or external device is installed as well as on the position of DIP switch position 2. If DIP switch position 2 is in the up (OPEN) position and an internal MMH2834 modem installed, the Composite Link Settings menu for the MMH2834 modem is displayed.
  • Page 74 DataTalker Owner’s Manual The Dial/Leased option selects the type of connection to the telephone company. If the data line provided by the telephone company is a dial-up line, then you must select the dial option. The options are Dial and Leased with the default being Dial. The 2 or 4 Wire option selects how the MMH2834 modem is connected to the telephone line.
  • Page 75 Composite Link Settings - Internal 56K DSU The Composite Link Settings - Internal DSU menu allows you to configure the composite link for a DSU. The default parameters for an internal DSU are displayed in the following menu: C o m p o s i t e L i n k S e t t i n g s - I n t e r n a l D S U 1 - S p e e d : 5 6 k 2 - C l o c k i n g :...
  • Page 76 DataTalker Owner’s Manual The Dial On Demand (DOD)/Disconnect On Inactivity (DOI) option drops DTR to the terminal adapter to disconnect if the inactivity timer has expired and raises DTR to reconnect if the voice/ fax or data channel goes active. When this option is turned ON, a new menu is displayed. The default is to have the DOD/DOI option turned off.
  • Page 77 Composite Link Settings - External Device The Composite Link Settings - External Device menu allows you to configure the composite link for an external device. The default parameters for an external device are displayed in the following menu: C o m p o s i t e L i n k S e t t i n g s - E x t e r n a l D e v i c e 1 - On-Line XMT Rate: 56000 2 - Clocking:...

  • Page 78: Statistics

    DataTalker Owner’s Manual 6.3 Statistics The Statistics menu allows you display or clear the composite link statistics, or return to the previous menu or to the Main Menu. Statistics - View Composite Link Statistics - Clear Composite Link Statistics - Main Menu - Previous Menu Selection : _ To display or clear the composite link statistics, enter the corresponding option number and press...

  • Page 79: Reset Options

    6.4 Reset Options The Reset Options menu allows you to reset the unit, the data and voice/fax channels, each voice/fax channel, or just the data channel. Reset Options 1 - Reset Unit 2 - Reset Data and Voice/Fax Channels 3 - Reset Voice/Fax Channel 1 4 - Reset Voice/Fax Channel 2 5 - Reset Data Channel M - Main Menu...

  • Page 80: Loop Tests

    DataTalker Owner’s Manual 6.5.1 Loop Tests The Loop Tests menu provides either a voice loopback or a composite link loopback that depends on the type of link device. Loop Tests 1 - Voice Loopback 2 - Composite Link Loopback M - Main Menu P - Previous Menu Selection : _ The following messages are displayed, depending on the loopback test.

  • Page 81: Configure Remote Unit

    6.6 Configure Remote Unit Configuration menu option 5 is dependent on the position of DIP switch SW-5. If DIP switch SW- 5 is in the Open (Up) position (MMV8/16/32), the configuration menu allows for the DataTalker to set parameters to communicate with with other MultiMux products (i.e., MMV800, MMV1600, or MMV3200 series).

  • Page 82: Quick Setup

    DataTalker Owner’s Manual The Unit Source Node option specifies the node number of the local node. This number has to be unique and any number from 0 to 9. Remember that the node number will be used by other nodes. The Data Destination Node option specifies the node number of the remote node.
  • Page 83 Table 6-1. Main Office Installation Step Procedure Voice/Fax - Plug an analog PBX extension into the FXO jack on the back of the Data Talker. VOICE/FAX CHANNEL 2 DATA/COMMAND LEASED DIGITAL DIAL-UP RS232C/V.35 MODEM VOICE/FAX CHANNEL 1 EXTERNAL COMPOSITE VOICE/FAX CHANNEL 1 FXO Connector Table 6-1.
  • Page 84 DataTalker Owner’s Manual Data Port - Plug the host computer into the Data/Command port and put dip switch 3 up (located on the side of the Data Talker). DATA/COMMAND E&M DIAL-UP LEASED DIGITAL RS232C/V.35 EXTERNAL COMPOSITE MODEM DSU/TA VOICE/FAX CHANNEL 1 INTERNAL COMPOSITE DATA/COMMAND Connector...
  • Page 85 Table 6-2. Home Office Installation Step Procedure Voice/Fax - Plug your telephone into the FXS jack on the back of the Data Talker. RJ-11 Phone Cable VOICE/FAX CHANNEL 2 DATA/COMMAND E&M DIAL-UP LEASED DIGITAL RS232C/V.35 EXTERNAL COMPOSITE MODEM DSU/TA VOICE/FAX CHANNEL 1 POWER INTERNAL COMPOSITE VOICE/FAX...
  • Page 86 DataTalker Owner’s Manual Data Port - Plug your PC into the Data/Command port and put dip switch 3 up to exit command mode and enable data mode (located on the side of the Data Talker). DATA/COMMAND E&M DIAL-UP LEASED DIGITAL RS232C/V.35 EXTERNAL COMPOSITE MODEM...

  • Page 87: Chapter 7 - Troubleshooting

    Chapter 7 - Troubleshooting...

  • Page 88: Introduction

    DataTalker Owner’s Manual 7.1 Introduction The DataTalker is designed to be easy to operate and maintain. The procedures in this chapter will help isolate any problem to a specific network component, at which point you will be instructed to call the appropriate personnel or execute commands to adjust operating conditions. You are not expected to perform any specific repair procedures on the DataTalker besides command execution and switch settings.

  • Page 89: Test Cables

    7.3 Test Cables If you are using the DataTalker internal DSU or MMH2834 modem, there are three test cables you can use to check out your system. Two DataTalker back-to-back test cables allow you to connect your two DataTalkers locally before installing them on either end of a phone line. There is also a composite link loopback cable that you can use with the internal DSU to loop the DataTalker composite link signal back to itself.

  • Page 90: Troubleshooting Guide

    DataTalker Owner’s Manual 7.4 Troubleshooting Guide This troubleshooting guide is designed to help you pinpoint the cause of your problem and correct it as quickly as possible. Because equipment from different manufacturers is typically involved in multiplexer networks, you may encounter “finger pointing” as to who is at fault. Who is at fault is not as important as getting you back on line as soon as possible.
  • Page 91 Table 7-1. Command Port Troubleshooting Problem Command port device not communication with DataTalker Table 7-2. Composite Link Troubleshooting Internal DSU Problem Composite link down with CTS, XMT, and RD LED on Possible Causes Communications software not installed on command port PC Command port not enabled Bad cable or cable connection Possible Causes...
  • Page 92 DataTalker Owner’s Manual Table 7-2. Composite Link Troubleshooting Internal DSU Problem Composite link down with CD, CTS, XMT, RD and RCV LEDs Flashing RXT LED Possible Causes Composite link not configured correctly High error rate on communication line DSU clocking configured incorrectly Solution 1.
  • Page 93 Internal ISDN Terminal Adapter Problem Composite link down with CTS, XMT and RD LEDs on Composite link down with CD, CTS, XMT, RCV and RD LEDs Flashing RXT LED Possible Causes Terminal adapter not communicating with ISDN line Faulty communication line Composite link not configured correctly High error rate on communication...
  • Page 94 DataTalker Owner’s Manual Internal MMH2834 Modem Problem Composite link down with CTS, XMT, and RD LEDs on Composite link down with CD, CTS, XMT, RCV and RD LEDs Flashing RXT LED Possible Causes MMH2834 modem not communicating with communications line Faulty communications line Composite link not configured correctly...
  • Page 95 External Composite Link Device Problem Composite link down with CTS, XMT and RD LEDs on Composite link down with CD, CTS, XMT, RCV and RD LEDs Flashing RXT LED Composite link down with CD, CTS and RD LEDs on Possible Causes Composite link not communicating with communications line Faulty communications line...
  • Page 96 DataTalker Owner’s Manual Table 7-3 Data Channel Troubleshooting Problem Async Data Channel Channel Device not communicating with DataTalker; composite link up with CD,, CTS, XMT, RCV and RD LEDs Async Data Channel device losing data Sync Data Channel Channel Device not communicating with DataTalker;...
  • Page 97 Table 7-4. Voice/Fax Troubleshooting Problem Volume levels not sufficient on local voice/fax channel Local telephone goes off-hook and remote telephone does not ring (FXS to FXS configuration) Data throughput slows excessively when voice/fax channel is active FXO to FXO configuration - local telephone does not ring Parts of words are not being heard...
  • Page 98 (see Table 7-11). 1. Call phone company and verify communication line. 1. Verify that the phone cord for the voice or fax machine is connected to the correct interface connector.

  • Page 99: Composite Link Settings - Internal Dsu

    7.5 Composite Link Settings - Internal DSU Table 7-5. Composite Link Settings - Internal DSU Step Procedure Toggle DIP switch position 3 to the down (closed) position to enable the command port. Connect a terminal or PC running communications software to the DATA/COMMAND connector on the back panel of the DataTalker.

  • Page 100: Composite Link Settings - Internal Isdn Terminal

    DataTalker Owner’s Manual 7.6 Composite Link Settings - Internal ISDN Terminal Adapter Table 7-6. Composite Link Settings - Internal ISDN Terminal Adapter Step Procedure Toggle DIP switch position 3 to the down (closed) position to enable the command port. Connect a terminal or PC running communications software to the DATA/COMMAND connector on the back panel of the DataTalker.

  • Page 101: Composite Link Settings - Internal Modem

    7.7 Composite Link Settings - Internal Modem Table 7-7. Composite Link Settings - Internal MMH2834 Step Procedure Toggle DIP switch position 3 to the down (closed) position to enable the command port. Connect a terminal or PC running communications software to the DATA/COMMAND connector on the back panel of the DataTalker.

  • Page 102: Composite Link Settings - External Device

    DataTalker Owner’s Manual 7.8 Composite Link Settings - External Device Table 7-8. Composite Link Settings - External Device Step Procedure Toggle DIP switch position 3 to the down (closed) position to enable the command port. Connect a terminal or PC running communications software to the DATA/COMMAND connector on the back panel of the DataTalker.

  • Page 103: Composite Link Statistics

    7.9 Composite Link Statistics Table 7-9. Composite Link Statistics Step Procedure Toggle DIP switch position 3 to the down (closed) position to enable the command port. Connect a terminal or PC running communications software to the DATA/COMMAND connector on the back panel of the DataTalker. Note: Any cables connected to the computer should be shielded to reduce interference.
  • Page 104 DataTalker Owner’s Manual Comparing Data Blocks Transmitted with Data Blocks Retransmitted (the number of retransmits needed to get the data through) can indicate a line problem. Comparing Data Blocks Received with Receive Block Errors can indicate the same problem from the other end of the link.

  • Page 105: Data Port Configuration

    7.10Data Port Configuration Table 7-10. Data Port Configuration Step Procedure Toggle DIP switch position 3 to the down (closed) position to enable the command port. Connect a terminal or PC running communications software to the DATA/COMMAND connector on the back panel of the DataTalker. Note: Any cables connected to the computer should be shielded to reduce interference.
  • Page 106 DataTalker Owner’s Manual If the data port is set up as an asynchronous data channel, you should verify all 12 options. Data Port Configuration 1 - Async/Sync: 2 - Speed: 3 - Clocking: 4 - Idle Condition: 5 - NRZ/NRZI Encoding: 6 - CRC Preset: 7 - Inter-frame Timer: S - Store All Configuations...

  • Page 107: Voice/Fax Channel Configuration

    7.11 Voice/Fax Channel Configuration Table 7-11. Voice/Fax Channel Configuration Step Procedure Toggle DIP switch position 3 to the down (closed) position to enable the command port. Connect a terminal or PC running communications software to the DATA/COMMAND connector on the back panel of the DataTalker. Note: Any cables connected to the computer should be shielded to reduce interference.
  • Page 108 DataTalker Owner’s Manual Voice/Fax Channel 1 Configuration - Destination Channel - Digitizing Rate - Output Level Atten. - Input Level Gain - Silence Suppression - Local Interface Type Ground/Loop Start (FXS) : Loop 2 or 4 Wire (E&M) Dialtone/Wink (E&M) 10 - Wink Timer (E&M) 11 - Remote Interface Type...

  • Page 109: Diagnostic Testing

    7.12Diagnostic Testing Table 7-12. Diagnostic Testing Step Procedure Toggle DIP switch position 3 to the down (closed) position to enable the command port. Connect a terminal or PC running communications software to the DATA/COMMAND connector on the back panel of the DataTalker. Note: Any cables connected to the computer should be shielded to reduce interference.
  • Page 110 DataTalker Owner’s Manual...

  • Page 111: Chapter 8 - Warranty, Service And Tech Support

    Chapter 8 - Warranty, Service and Tech Support...

  • Page 112: Introduction

    CompuServe and the Internet. 8.2 Limited Warranty Multi-Tech Systems, Inc. (“MTS”) warrants that its products will be free from defects in material or workmanship for a period of two years from the date of purchase, or if proof of purchase is not provided, two years from date of shipment.

  • Page 113: Tech Support

    If your tech support specialist decides that service is required, your DataTalker may be sent (freight prepaid) to our factory. Return shipping charges will be paid by Multi-Tech Systems. Note: Before returning your DataTalker for service, record your data port configuration and voice/ fax channel configurations.

  • Page 114: The Multi-Tech Bbs

    DataTalker Owner’s Manual 8.4 The Multi-Tech BBS For customers who do not have Internet access, Multi-Tech maintains a bulletin board system (BBS) that mirrors its FTP site. Information available from the BBS includes new product information, product upgrade files, and problem-solving tips. The phone number for the Multi- Tech BBS is (800) 392-2432 (USA and Canada) or (612) 785-3702 (international and local).

  • Page 115: About The Internet

    6. Select a file transfer protocol by typing the indicated letter, such as Z for Zmodem (the recommended protocol). 7. If you select Zmodem, the file will transfer automatically. If you select another protocol, you may have to initiate the transfer yourself. (In most data communications programs, the PAGE DOWN key initiates the download.) 8.
  • Page 116 DataTalker Owner’s Manual...

  • Page 117: Appendixes

    Appendixes...

  • Page 118: Appendix A - Ascii Conversion Chart

    DataTalker Owner’s Manual Appendix A - ASCII Conversion Chart CTRL CODE HEX DEC CODE HEX “ & ‘ < > NUL Null, or all zeros Vertical tab SOH Start of header Formfeed STX Start of text Carriage return ETX End of text Shift out EOT End of transmission Shift in...

  • Page 119: Appendix B - Rs-232C Interface Specification

    Appendix B - RS-232C Interface Specification The DataTalker's RS232C interface circuits have been designed to meet the electrical specifications given in the EIA (Electronic Industries Association) RS232C and ITU-T (International Telecommunications Union) V.24 standards. All signals generated by the DataTalker are approximately 10 volts when measured across a load of 300 ohms or greater. The receiving circuits of the DataTalker will accept signals in the 3 to 25 volt range.

  • Page 120: Appendix C - Cabling Diagrams

    DataTalker Owner’s Manual Appendix C - Cabling Diagrams Channel Cables DCE to Channel Cabling (with EIA pass-through) PIN NO. DATA/COMMAND Connector DCE to Channel cabling (without EIA pass-through) PIN NO. DATA/COMMAND Connector DTE to Channel cabling PIN NO. DATA/COMMAND Connector PIN NO.
  • Page 121 Composite Link Cabling RS232C/V.24 Configured Composite Link* PIN NO. External Synchronous Modem/DSU/ Terminal Adapter Connector V.35 Adapter Cable Configured on a RS232C/V.35 Composite Link** V.35 34-PIN CONNECTOR (MALE) * The DataTalker RS232C interface circuits have been designed to meet the electrical specifications given in EIA (Electronic Industries Association) RS232C and ITU-T (International Telecommunications Union) V.24 Standards.
  • Page 122 DataTalker Owner’s Manual RJ-48 Cable for Internal DSU Receive Transmit RJ-48 Cable for Internal ISDN Terminal Adapter Back to Back Mux Cable DB-25 FEMALE CONNECTOR Frame Ground Transmit Data Receive Data Request To Send Clear To Send Signal Ground Data Set Ready Carrier Detect Transmit Clock Receive Clock...

  • Page 123: Voice/Fax Channel Connectors

    E&M Voice/Fax Channel Cable RJ45 Plug * Cable wire is solid 24AWG. If connecting to a punch block, spade lugs may be cut off. RJ45 Spade Lug Wire Color Green/White White/Green White/Orange 4-Wire Output White/Blue Blue/White Orange/White 4-Wire Output Brown/White White/Brown Voice/Fax Channel Connectors E&M...

  • Page 124: Appendix D - Flow Control Background

    DataTalker Owner’s Manual Appendix D - Flow Control Background Flow control refers to techniques used by computer devices and the DataTalker to stop and restart the flow of data between them. Flow control prevents a channel device or DataTalker from receiving more data than it can handle.

  • Page 125: Appendix E - Mmh2834 Modem S-Registers

    Appendix E - MMH2834 Modem S-Registers Introduction This section describes the MMH2834 memory locations called S-registers, where certain MMH2834 modem configurations are stored. Each S-register is assigned a number (S0, S1, S2, etc.). Use the S command to read and/or change the value stored in an S-register (ATSr? to read and ATSr= to change S-register values).
  • Page 126 DataTalker Owner’s Manual Tone Dialing: Tone Spacing and Duration Unit: 1 ms Range: 1–255, 80–255*, 80–255*** Default: 70, 80*, 80*** Description: S11 sets the speed of tone dialing (spacing and tone duration times). The default value is 70 units (Decimal 7) or 80 units, where each unit is one ms, meaning that each tone is on for 70 ms with a 70 ms pause between each.

  • Page 127: Appendix F - Mmh2834 Modem Commands

    Appendix F - MMH2834 Modem Commands F.1 Introduction Before you can enter commands for the MMH2834 internal composite link modem, you must access the modem using the composite link access enable command (#CLA1). When you have configured the MMH2834 modem, disable access from the command port to the composite link using the composite link access disable command (#CLA0).
  • Page 128 DataTalker Owner’s Manual TYPE COMMAND Configure Error Correction (Section F.9) Compression & &BS Block Size &E14 (Section F.10) &E15 Configure Speed $BA0 Conversion $BA1 (Section F.11) Execute Immediate Action Commands (Section F.12) Read and Assign Sr? S-Register Values Sr= (Appendix E) DESCRIPTION Negotiate V42 Mode During Handshake MNP On/LAPM Off...

  • Page 129: Dialing Action Commands

    F.2 Dialing Action Commands Dial Command The letter D in a command causes the MMH2834 to dial the telephone number immediately following it. For example, if you enter ATD5551212 and hit RETURN, the MMH2834 dials the number 555-1212. The MMH2834 gives you several choices of dialing methods. You can use tone or pulse dialing, by inserting a letter T or a P in the command string.

  • Page 130: Dial Modifier Commands

    DataTalker Owner’s Manual F.3 Dial Modifier Commands Pulse or Tone Dial The MMH2834 dials numbers using either pulse or tone dialing, or a combination of both methods. Pulse dialing is a method used by rotary-dial telephones, which involves the timed opening and closing of line relay.
  • Page 131 Wait for New Dialtone A W inserted in the dialing command causes the MMH2834 to wait for another dial tone, and not resume dialing until another dial tone is detected. It is not necessary to enter a W at the beginning of the dialing command to wait for a modem dial tone, because the modem will do that first (pause automatically).

  • Page 132: Phone Number Memory Commands

    DataTalker Owner’s Manual F.4 Phone Number Memory Commands Storing Phone Numbers A telephone number and command line of up to sixty characters may be stored in the MMH2834’s number memory. As many as ten of these numbers may be stored. Each number will be given a name, using the codes N0, N1, N2 up to N9.

  • Page 133: Configuration And Default Storage Commands

    Appendix F - MMH2834 Modem Commands F.5 Configuration and Default Storage Commands Store Configuration & S-Register Params. in Non-Volitile Memory &W The MMH2834 can store configuration parameters and S-register values in its non-volatile read/ write Random Access Memory (RAM) memory. The &W command does this, which prevents any reconfiguration from being lost on a power-down or Reset (ATZ) condition.

  • Page 134: Command Response (Result Code) Commands

    DataTalker Owner’s Manual F.6 Command Response (Result Code) Commands Echo Command Mode Characters If the MMH2834 is connected to a full-duplex computer, it may be necessary for the modem to be configured to echo back characters entered while in the command mode in order for them to be displayed.
  • Page 135 TERSE VERBOSE CONNECT RING NO CARRIER ERROR CONNECT 1200 NO DIALTONE BUSY NO ANSWER CONNECT 2400 CONNECT 4800 CONNECT 9600 CONNECT 14400 CONNECT 19200 CONNECT 21600 CONNECT 24000 CONNECT 26400 CONNECT 28800 * When error correction is used, the word RELIABLE (verbose) or the letter R (terse) is added to these responses.
  • Page 136 DataTalker Owner’s Manual The MMH2834 also can detect a distant busy signal, if after dialing, it reaches a busy number. This is useful because it allows the modem to immediately abandon a call, rather than wait 45 seconds for a carrier signal that will never come. The MMH2834 gives you a choice between the wait-for-dial-tone (“smart”) method we just described, and blind (“dumb”) dialing, where instead of detecting actual dial tones, the modem relies on timed pauses.

  • Page 137: Phone Line Conditioning Commands

    F.7 Phone Line Conditioning Commands Enable or Disable Recognition of Remote Digital Loop Signal The MMH2834 has several self-test features (covered in Appendix G). The tests are activated with different U commands, such as ATU1, and so fortF. The &T command is a phone line conditioning command that enables or disables the modem's ability to recognize the Remote Digital Loop (RDL) test signal.

  • Page 138: Error Correction Commands

    DataTalker Owner’s Manual F.9 Error Correction Commands You can use AT commands to place your MMH2834 one of three V.42 (error correction) modes of operation. V.42 Mode Select The V.42 standard implements both MNP Class 3 & 4 and LAP-M error correction methods. The V.42 Mode Select command (#L) selects which type of error correction (MNP or LAP-M) your MMH2834 uses for transmissions.
  • Page 139 Enable/Disable Auto-Reliable Fallback Character In Auto-Reliable mode, the modem is given four seconds to establish a Reliable connection. If a single CARRIAGE RETURN is received from the remote modem during this four second period, the Auto-Reliable modem assumes that the remote modem is not in Reliable mode and drops to Normal mode.

  • Page 140: Data Compression

    DataTalker Owner’s Manual F.10 Compression and Maximum Block Size Commands Data Compression The data compression (&E14) command enables data compression. Maximum Block Size The maximum size of Reliable mode data blocks can be controlled with the &BS command. MNP 3 sends blocks of 1 to 64 characters. MNP 4 and 5 typically send blocks of 1 to 256 characters and LAP-M typically sends 128 characters.

  • Page 141: Speed Conversion Commands

    F.11 Speed Conversion Commands Speed conversion is a necessary part of data compression since data must be presented to the modem faster than it can handle data, if data compression is to be effective. Speed conversion allows the MMH2834 to communicate at one speed over the phone line, and at another speed at the RS232C interface.

  • Page 142: Serial Port Baud Rate

    DataTalker Owner’s Manual Serial Port Baud Rate The $SB command presets the speed of the MMH2834's serial (RS232C) port, in both Originate and Answer modes. Speed conversion allows you to set this serial port baud rate at a fixed speed of up to 115,200 bps, regardless of the modem’s transmission speed setting. In order for this command to be effective, the modem’s Speed Conversion feature must first be turned off with the $BA command.

  • Page 143: Immediate Action Commands

    Appendix F - MMH2834 Modem Commands F.12 Immediate Action Commands Help Screens The Help command is designed to give you short explanations on how to use each MMH2834 command. The Help command can be quite useful if your manual is not handy and you are in the middle of a communications session.
  • Page 144 DataTalker Owner’s Manual Listing On-Line Diagnostics The L8 command displays the current on-line CONNECT status status of the MMH2834. This display can be printed and used as a modem status report or as diagnostic information (such as when calling Tech Support).This report is given only when on-line. To activate this command first type +++AT<CR>...

  • Page 145: Glossary

    Glossary Glossary AC (Alternating Current): A power source whose signal crosses a reference voltage (usually called ground or zero). Alternating between a maximum and minimum voltage, AC may also be referred to as a bipolar signal. Contrast with DC. ACK (ACKnowledgement code) (pronounced "ack"): A communications code sent from a receiving modem to a transmitting modem to indicate that it is ready to accept data.
  • Page 146 DataTalker Owner’s Manual BSC (Binary Synchronous Communications): Also called "bisync", this communications protocol was the first synchronous data format used by IBM. It is still in use, but is rapidly being replaced by IBM's newer Synchronous Data Link Control (SDLC). Bisync is a byte-synchronous protocol that has longer delays and more overhead than the bit-synchronous SDLC.
  • Page 147 Glossary De facto standards: A de facto standard is one of two types of voluntary standards recognized by a given market. It is introduced by a single vendor and becomes a standard by its widespread use and acceptance by other vendors. AT&T's Bell 212A, IBM's Binary Synchronous Protocol or DEC's VT-100 terminal protocol are examples of de facto standards.
  • Page 148 DataTalker Owner’s Manual Flow control: The process of regulating the speed at which data enters or leaves a serial port. Software flow control is implemented by communications software or by the user sending predefined characters or packets which are recognized as "pause" and "resume" indicators.
  • Page 149 Glossary Leased Line: A private, dedicated communications channel that connects two locations. This connection lasts for the duration of the subscription. Leased lines may be conditioned to improve line quality over that of dial-up lines. Line Conditioning: An additional cost option offered by the telephone company for their leased, voice-grade lines. The service provides a careful balance of line enhancements to improve the frequency response and to reduce distortion.
  • Page 150 DataTalker Owner’s Manual PCMCIA (personal computer memory card international association): An organization of U.S. and Japanese companies set up to standardize memory cards and other architecture-independent expansion devices. These cards are typically used in laptop computers. Phase: The timing of a signal based upon the starting point of each cycle in another signal. To be detected phase requires the comparing of two signals.
  • Page 151 Glossary Synchronous Transmission: The transmission of data which involves sending a group of characters in a packet. This is a common method of transmission between computers on a network or between modems. One or more synchronous characters are transmitted to confirm clocking before each packet of data is transmitted.

  • Page 152: Index

    DataTalker Owner’s Manual Index Symbols 2 or 4 Wire (E&M) option ... 72 2 or 4 Wire option ... 74 Answer mode ... 138 Answer/Originate option ... 74 ASCII code ... 118 Async data channel ... 16 Async/Sync option ... 67, 69 Auto answer ...
  • Page 153 Dialtone/Wink (E&M) option ... 72 Digital data service (DDS) ... 10 Digital service unit (DSU) ... 10 Digitizing Rate option ... 70 DIP switch ... 42 DOC ... 15 DSU, internal ... 27 configuration ... 47, 51, 52 settings ... 75, 99 specifications ...
  • Page 154 DataTalker Owner’s Manual Remote Interface Type option ... 72 REN ... 14 Ringer equivalence number ... 14 Rings until modem answers ... 125 RS232C/V.24 interface ... 42 specification ... 119 RS232C/V.35 shunt ... 42 S-registers ... 125 S0 ... 125 S11 ...

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