Multi-Tech Systems BL-Series - Manuals

8 MultiModemBL User Guide 1.1 Introduction Welcome to the world of data communications. You have acquired one of the finest intelligentdesktop data/fax modems available today, the MultiModem II BL series modem, from Multi-Tech Systems. This User Guide covers various models within the BL series, and ...

9 Chapter 1 - Introduction and Description Chapter 5 - AT Command Mode Operation Chapter 5 may be the most important chapter of this manual. It begins with an introduction and discussion on Command Mode fundamentals. A flow chart is provided to illustrate Command Modeand On-Line Mode operation and t...

10 MultiModemBL User Guide 1.3 Modem Features The MultiModem BL Series modem connections can be made on Public Switched TelephoneNetworks (PSTNs) and/or point-to-point 2-wire and 4-wire leased telephone type circuits. Your modem offers interactive automatic dialing, as well as Command Mode option co...

11 Chapter 1 - Introduction and Description 1.3.3 1432 Series Features Your MT1432BL modem is designed according to the international CCITT V.32bis specification fordata signalling rates as high as 14.4K bps in full-duplex mode. The major application for the MT1432BL is in 4-wire leased line network...

12 MultiModemBL User Guide 1.5 Technical Specifications Your data/fax modem meets the specifications listed below: Tradename MultiModem IITM Model Numbers 2834 Series: MT2834BL, MT2834BLI, MT2834BLK 1932 Series: MT1932BL, MT1932BLI, MT2834BL-MAC 1432 Series: MT1432BL, MT1432BLI, MT21432BLK Data Rate...

16 MultiModemBL User Guide 1.6 Power Power is supplied through an AC power transformer terminated with a standard two-prong plug. Thetransformer supplies low voltage AC to the modem, and plugs into any conventional 115 volt AC, 60Hz, two-prong power outlet (240 volts AC, 50Hz, .3 Amp for Internation...

17 Chapter 1 - Introduction and Description (24.0) 24,000 bps. (2834 models only). This LED is lit when the modem is connected at 24,000 bps.Note: if the modem falls back to 21.6K bps while in V.34 mode, both the 24.0 and 19.2 LEDs light. (19.2) 19,200 bps. (2834 and 1932 models only) This LED is li...

20 MultiModemBL User Guide 2.1 What is in Your Modem Package? Your MultiModem is made up of many components. Make sure you have them all before trying tooperate your modem. MADE IN U.S.A MADE IN U.S.A Figure 2-1. Unpacking (MT2834BL shown) Your package should include: • MT2834BL, MT1932BL or MT1432B...

21 Chapter 2 - Installation and Connection 2.2 Installation The installation of the modem consists of making the physical connections necessary to render themodem functional with your computer. This includes making the proper serial, phone line, and powerconnections. Unless otherwise noted, these in...

24 MultiModemBL User Guide 2.3 Loading Trio DataFAX Software The following procedure will guide you through the installation of Trio DataFAX software. Theprocedure does not provide every screen or option in the process. The installation utility provides on-screen instructions for those elements that...

26 MultiModemBL User Guide 15 Click Next Dialog. The Phone Numbers and Prefixes dialog is displayed. 16 Follow the on-screen instructions and when you are finished, click Next Dialog. The following dialog is displayed: 17 Click OK, Exit the Installation Program. The Trio Applications program group i...

28 MultiModemBL User Guide 3.1 Introduction Chapter 2 guided you through the installation of Trio communications software. If you are using a different software package, there are some points you should take into consideration. Since yourcommunications software configuration is affected by the capab...

29 Chapter 3 - Software Configuration 3.2.2 The 16550 UART and Windows 3.1 Windows 3.1 may cause a loss of data when communicating at high speed, even with a 16550 UARTinstalled. Because Windows is multitasking—it switches between several programs running at thesame time—it can make the serial port ...

30 MultiModemBL User Guide 3.4 PC Initialization Strings We recommend the following initialization string for a MultiModem connected to a PC-compatiblecomputer when sharing a line with a telephone: AT &F X4 S0=0 ^M This string resets the modem to the factory default settings, selects extended re...

31 Chapter 3 - Software Configuration 3.5 Macintosh Initialization Macintosh computers cannot use RTS/CTS hardware flow control without a serial cable wired forhardware control. The Macintosh 128 and 512 models cannot use RTS/CTS flow control at all. Forthose Macintoshes turn off the default RTS/CTS...

32 MultiModemBL User Guide 3.6.3 File Transfer Protocols When you upload or download files with your modem, the host computer will ask which file transferprotocol you want to use. Most communications programs allow you to choose a default protocol.Your software’s documentation should list the ones i...

33 Chapter 3 - Software Configuration 3.8 Modem Basics You control your modem by issuing AT commands, setting S-Registers, and setting DIP-Switches.You can easily change the settings of your DIP-Switches, as they are located on the right side ofyour modem’s chassis. Right now your modem is set up fo...

37 Chapter 4 - Manual Dial and Automatic Answer 4.3 Automatic Leased Line Restoral Operation When the modem is in Dial Backup mode, it periodically checks the leased line to see if it'soperational and tries to restore the leased line if possible. S-Register S18 determines how oftenrestoral attempts ...

38 MultiModemBL User Guide 4.6 Dial-Up Operation When your modem is used as a dial-up modem (DIP-Switch #10 in the UP position), it can bothoriginate and answer calls. To originate calls, you use the automatic dialing capability of the modem'sCommand mode. To do this, use the computer or terminal ke...

39 Chapter 4 - Manual Dial and Automatic Answer 4.8 Automatic Answering The modem can be used as an automatic answering modem. No special modifications or settings arerequired other than making sure that the Auto-Answer select switch is set to Auto-answer enabled(DIP-Switch #5 UP). The modem, when i...

40 MultiModemBL User Guide 4.10 Handshaking Details This section briefly explains what happens between two modems in a normal call. We are assumingthat there are MultiModems at both the originating and at the answering end of the telephone line. (Ifother brands of modems are used with our modems, th...

43 Chapter 5 - Command Mode 5.1.2 Functional Modes The MultiModem can be in one of two functional states (see Figure 5-1). These are "Commandmode" and "On-line mode". (There is also an in-between state, "Wait-for-Carrier", where the modemis out of Command mode but not yet rea...

44 MultiModemBL User Guide 5.2 Summary of AT Commands A wide variety of autodial operations and modem options can be controlled when the modem is inCommand Mode. Remember, nearly all commands begin with AT. These commands are organized into several functional groups. An alphabetical summary ofcomman...

47 Chapter 5 - Command Mode 5.3 Result Codes The Command mode provides you with several responses, or “Result Codes”, that can aid you inCommand mode operation. These Result Codes are displayed on your video monitor. You can choose result codes that closely match those of the standard AT command set...

49 Chapter 5 - Command Mode 5.4 Dialing Commands 5.4.1 Dialing Action Commands Dial Command D The letter D in a command causes the modem to dial the telephone number immediately following it.For example, if you enter ATD5551212 and hit RETURN, the modem dials the number 555-1212. The D command is al...

50 MultiModemBL User Guide To activate DTR Dialing, enter AT$D1 and hit RETURN. The modem dials the phone number storedin the N0 location of memory when it receives a high DTR signal. DTR must remain high for theduration of the call, until disconnect. To deactivate DTR dialing, enter AT$D0 and hit R...

51 Chapter 5 - Command Mode Automatic Pauses in Dialing , You can cause the modem to pause during the dialing sequence by entering a comma characterwhere the pause is desired. This pause lasts two seconds. If a longer pause is desired, more thanone comma may be entered consecutively, with each comma...

52 MultiModemBL User Guide "Calling Card" Detect Tones $ The modem has the capability to detect AT&T "calling card" tones for the purpose of utilizing theuser's calling card number to originate an on-line connection. An $ symbol placed in the dialing stringcauses the modem to pau...

53 Chapter 5 - Command Mode 5.4.3 Phone Number Memory Commands Storing Phone Numbers D...N A telephone number and command line of up to sixty characters may be stored in the modem’snumber memory. As many as ten of these numbers may be stored. Each number will be given aname, using the codes N0, N1, ...

54 MultiModemBL User Guide 5.4.4 Configuration and Default Storage Commands Store Configuration & S-Register Parameters in Non-Volatile Memory &W The modem can store configuration parameters and S-Register values in its nonvolatile read/writeRandom Access Memory (RAM) memory. The &W comm...

55 Chapter 5 - Command Mode Unix UUCP Spoofing $SP The modem can be configured in a Unix environment that employs ACK flow control as a means ofmonitoring data integrity. The modem can do “UUCP spoofing”, where the modem is able to generateACKs at the DTE interface. Data is transmitted more time eff...

56 MultiModemBL User Guide 5.4.5 Command Response (Result Code) Commands Echo Command Mode Characters E If the modem is connected to a full-duplex computer, it may be necessary for the modem to beconfigured to echo back characters entered while in the Command Mode in order for them to bedisplayed. T...

57 Chapter 5 - Command Mode Result Codes (Basic and Extended) and Call Progress Selection X The X Command is used to select one of two possible dialing methods (“dumb” or “smart”), and toselect various response combinations related to these methods. You can choose to have certainresponses suppressed...

58 MultiModemBL User Guide 5.4.6 Phone Line Conditioning Commands Guard Tones (Not Used in BLI or BLK Models) &G The &G command is used to control the presence or absence of guard tones from the transmitterwhen in Answer mode, at either 1200 or 2400 bps. Guard tones are used in Europe and ot...

60 MultiModemBL User Guide Auto Speed Detect #A The function of the #A command is to detect and select the operational data rates (the “starting”speeds) with which the modem uses for initial handshake and speed selection. Remember, this command does not control the originating data rate of the modem...

61 Chapter 5 - Command Mode 5.4.7 RS-232C Interface Control Commands Carrier Detect Control &C The &C command allows you to control the status of the Carrier Detect signal (CD-Pin 8) on the RS-232C line. You have four choices. You can force the signal high, or allow it to act normally, or fo...

62 MultiModemBL User Guide Data Set Ready Control &S The &S command allows you to control the status of the Data Set Ready signal (DSR - pin 6) on theRS-232C interface. You have three choices. You can force the signal high, allow it to act normally, orset it to stay high until the modem disc...

63 Chapter 5 - Command Mode 5.4.8 Error Correction Commands You can use AT commands to place your modem one of three V.42 (error correction) modes ofoperation. These are the Normal, Auto-Reliable, and Reliable modes. Normal Mode &E0 In Normal mode of operation, the modem’s V.42 error correction ...

65 Chapter 5 - Command Mode Enable/Disable Auto Reliable Fallback Character $F In Auto-Reliable mode, the modem is given four seconds to establish a Reliable connection. If asingle CARRIAGE RETURN is received from the remote modem during this four second period, theAuto-Reliable modem assumes that t...

66 MultiModemBL User Guide 5.4.9 Flow Control Commands Flow control refers to the techniques used by computer devices to stop and restart the flow of data toand from each other. Flow control is necessary so that a device does not receive more data than itcan handle. In the case of the MultiModem, th...

68 MultiModemBL User Guide Normal Mode Modem Flow Control On &E11 When two MultiModems are connected in Normal mode (not using error correction), Xon/Xoff can beused to control the flow of data between the modems. Flow Control can be turned on or off with theNormal Mode Modem Flow Control comman...

69 Chapter 5 - Command Mode 5.4.10 Compression, Error Correction, Flow Control, Pass-Through and Pacing Commands The modem has a variety of commands to control its error correction and data compression options.These additional commands are listed below. (Remember to precede each command with the ATc...

70 MultiModemBL User Guide 5.4.11 Speed Conversion Commands Speed conversion is a necessary part of data compression since data must be presented to themodem faster than it can handle data, if data compression is to be effective. Speed conversion allows the modem to communicate at one speed over the...

72 MultiModemBL User Guide Serial Port Baud Rate $SB The $SB command presets the speed of the modem’s serial (RS-232C) port, in both Originate andAnswer modes. Speed conversion allows you to set this serial port baud rate at a fixed speed of up to115,200 bps for 1932 and 2834 models, and 57600 bps f...

73 Chapter 5 - Command Mode 5.4.12 Immediate Action Commands Help Screens $H The Help command is designed to give you short explanations on how to use each modemcommand. The Help command can be quite useful if your manual is not handy and you are in themiddle of a communications session. Although th...

74 MultiModemBL User Guide Listing On-Line Diagnostics L8 The L8 command displays the current on-line CONNECT status of the modem. This display can beprinted and used as a modem status report or as diagnostic information (such as when calling TechSupport). To activate this command first type +++AT&l...

75 Chapter 5 - Command Mode Force Answer Mode A You can force the modem into Answer mode with the modem’s A command. Entering ATA when in Command mode immediately brings your modem off-hook, out of Commandmode and into On-Line Answer mode, and causes it to transmit its carrier signal over the phone ...

85 Chapter 6 - S-Registers 6.2 Reading and Assigning S-Register Values The S command is used to assign a value to, and to read the current value of, an S-Register. To readan S-Register value, enter the letter S followed by the S-register number and a question mark (?),then hit RETURN. For example, e...

86 MultiModemBL User Guide 6.3 AT Command and S-Register Summary The vast majority of installations are similar, with the modem being used to dial up a remoteinstallation where the call is automatically answered. Your modem has a default configuration to dialanother modem that supports error correct...

89 Chapter 7 - Callback Security and Remote Configuration 7.3 Remote Configuration Description The Remote Configuration feature is a network management tool that allows you to configuremodems remotely. This means you could configure modems anywhere in your network from onelocation without having to ...

90 MultiModemBL User Guide To turn your modem's Callback Security feature on and off: 7. If you want Callback Security with both remote and local password security, enter AT#DB1 andhit RETURN. You must turn on Callback Security to be able to enter dial back phone numbers. 8. If you want Callback Sec...

91 Chapter 7 - Callback Security and Remote Configuration The + and/or - characters entered before the phone number are optional. The + (DepositNumber) code allows a caller to enter the number he or she wishes the Callback modem to callback when the caller uses a particular password (Step 3 of Table...

92 MultiModemBL User Guide 7.3.2 Remote Configuration Procedures The procedures for using the Remote Configuration features are the same whether or not a calloriginates from the remote modem. Once the modem is on-line, perform the procedures in Table 7-4. Table 7-4 Remote Configuration Operation Pro...

93 Chapter 7 - Callback Security and Remote Configuration 7.4 Remote Configuration and Callback Security AT Commands The following AT commands are used with Remote Configuration and Callback Security features. Assign Passwords for Callback Phone Numbers #CBN When you have callback security enabled f...

94 MultiModemBL User Guide Erase Callback Password #RCBNxx This command erases the single callback password specified by xx (0 through 29). Erase Callback Phone Number #RDNxx This command erases the single phone number specified by xx (0 through 29).

95 Chapter 7 - Callback Security and Remote Configuration 7.5 Remote Configuration/Callback Security S-Registers The following S-Registers are used with Remote Configuration and Callback Security features. Remote Configuration Character (S13) S13 defines the modem’s remote configuration escape chara...

103 Chapter 8 - Modem Testing 8.6 Synchronous Mode Testing The following tests must be run with your modem in Synchronous mode (DIP Switch #12 in the Up(OPEN) position), DIP Switch #9 controls the modem’s Synchronous mode testing function. (Refer to Chapter 9 for DIP Switch information.) The test pr...

109 Chapter 9 - DIP-Switch Settings 9.2 DIP-Switch Option Settings Switch #1Forced DTR -- "DTR"(Asynchronous/Synchronous Mode/Leased Line/Dial-Up) The modem must have a high DTR signal in order to operate. DTR is provided to the modem by theterminal or computer to which it is attached, throu...

114 MultiModemBL User Guide 1932 Series: 19200 bps Operation = Switch #13 UP and Switch #14 UP 14400 bps Operation = Switch #13 DN and Switch #14 UP 9600 bps Operation = Switch #13 UP and Switch #14 DN 2400 bps Operation = Switch #13 DN and Switch #14 DN Factory Default Setting = Switch #13 UP and S...

115 Chapter 9 - DIP-Switch Settings 9.4 Recording Option Configurations This section lets you record any changes you may have made to the DIP-Switch settings. Circle theappropriate setting and record the effect for future reference. DIP-Switches Switch Function Position Effect #1 Force DTR/DTR from ...

118 MultiModemBL User Guide 10.1 Introduction This chapter starts out with statements about your modem's 5-year warranty. The next section, TechSupport, should be read carefully if you have questions or problems with your modem. It includes thetechnical support telephone numbers, space for recording...

119 Chapter 10 - Warranty, Service and Tech Support 10.3 Tech Support Multi-Tech has an excellent staff of technical support personnel available to help you get the most outof your Multi-Tech product. If you have any questions about the operation of this unit, call 1-800-972-2439. Please fill out th...

120 MultiModemBL User Guide 10.5 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 pho...

121 Chapter 10 - Warranty, Service and Tech Support 10.5.1 Upgrading the MultiModem The MultiModem has a Flash PROM which contains firmware code for the hardware and DSP codefor the digital signal processor chips. At various times, Multi-Tech may add enhancements and/orfixes to the firmware. The fla...

122 MultiModemBL User Guide 10.8 About Ordering Accessories SupplyNet, Inc. can supply you with replacement transformers, cables and connectors for selectMulti-Tech products. You can place an order with SupplyNet via mail, phone, fax or the Internet at: Mail: SupplyNet, Inc.614 Corporate WayValley C...

124 MultiModemBL User Guide Appendix A - Troubleshooting Your modem was thoroughly tested at the factory before it was shipped. If you are unable to make asuccessful connection or if you experience data loss or garbled characters during your connection, itis possible that the modem is defective. How...

126 MultiModemBL User Guide The Modem Dials But Cannot Make a Connection There can be several reasons the modem fails to make a connection. Possibilities include • lack of a physical connection to the telephone line. • a wrong dial tone. • a busy signal. • a wrong number. • no modem at the other end...

127 Appendix A - Troubleshooting The Modem Disconnects While On-line • If you have call waiting on the same phone line as your modem, it may interrupt your connectionwhen someone tries to call you. If you have call waiting, disable it before each call. In mosttelephone areas, you can disable call wa...

128 MultiModemBL User Guide I Am Losing Data • If you are using data compression and a high speed serial port, set the serial port baud rate tofour times the data rate. • Your UART may not be reliable at serial port speeds over 9600 bps or 19,200 bps. Turn off datacompression, reset your serial port...

129 Appendix B - ASCII Conversion Chart Appendix B - ASCII Character Code/Hex/Decimal Conversion Chart CTRL CODE HEX DEC CODE HEX DEC CODE HEX DEC CODE HEX DEC @ NUL 00 0 SP 20 32 @ 40 64 60 96 A SOH 01 1 ! 21 33 A 41 65 a 61 97 B STX 02 2 “ 22 34 B 42 66 b 62 98 C ETX 03 3 # 23 35 C 43 67 c 63 99 D...

130 MultiModemBL User Guide Appendix C - Dial Pulse and Tone-Dial Frequencies Dial Pulses Closed Open B A Digit 2 Digit 1 In the example above, the digit 2 is pulse dialed, followed by the digit 1. Each pulse consists of an AmSec. open and a B mSec. closed, where A will be either 60 or 67 mSec and B...

131 Appendix D - AT Command Summary Appendix D - Command Summary Command Values Description AT Attention Code that precedes most command stringsexcept A/, A: and Escape Codes. RETURN Pressing RETURN key executes most commands. $ This symbol placed in dialing string enables themodem to detect AT&...

138 MultiModemBL User Guide Callback Security/Remote Configuration Command Summary Command Description #DBn #DB0 disables Callback Security and answering Yesto the prompt turns off Callback Security and erasesstored phone numbers and passwords. AnsweringNo to the prompt aborts the command. #DB1 acti...

139 Appendix D - AT Command Summary Password Command Summary Command Description #Ixxxxxxxxxx Login Password is any keyboard characters (x)(upper/lower case sensitive), minimum 6 andmaximum 10 characters. The default LoginPassword is #IMULTI-TECH. #Syyyyyyyyyy Setup Password is any keyboard characte...

140 MultiModemBL User Guide Appendix E - DIP-Switch Summary Asynchronous Mode DIP-Switch Condition Effect #1 UP* DTR dependent on interface Down DTR forced On at all times #2 UP* Hardware Flow Control Down Xon/Xoff Flow Control #3** 2834 Series: UP -15 dB Transmission (leased line) Down* -9 dB Trans...

141 Appendix E - DIP-Switch Summary Synchronous Mode DIP-Switch Condition Effect #1 UP* DTR Dependent On interface Down DTR forced On at all times #2 UP* SDLC Mode On Down BSC Mode On #3 UP Command Mode Response Off Down* Command Mode Response On #4 UP* AS/400 Mode Off Down AS/400 Mode On #5 UP* Ans...

145 Appendix G - Result Code Summary Appendix G - Result Code Summary TERSE (Digit) VERBOSE (Words) Effect 0 OK Command was executed without error; ready fornext command. 1 CONNECT Modem has detected carrier and gone on-line. 2 RING Modem has detected ring caused by incoming call. 3 NO CARRIER No ca...

147 Appendix H - V.25bis Operation Appendix H - V.25bis Operation Chapter 5 described a set of commands which let the modem dial, hang-up, and be configured forvarious applications. However, these commands, the AT command set, are only functional when theDTE transmits data asynchronously. That is, t...

149 Appendix H - V.25bis Operation V.25bis Mode AT Commands The following commands will either alter standard V.25bis behavior (so you must be careful in theiruse) or they are not allowed, as indicated. All other commands can be used in V.25bis operation. A Not Allowed A/ Not Allowed A: Not Allowed ...

152 MultiModemBL User Guide ITU V.25bis Country Specific Information Due to the flexibility of the V.25bis standard, each country may establish specific regulationsgoverning the way operations are handled. The purpose of this document is to detail each country'sspecific regulations that affect opera...

154 MultiModemBL User Guide Appendix I - MultiModemBL Cables These cables connect your modem to your terminal or computer’s serial port. 25-PIN DTE Connector 25-PIN DCE Device 2 TD 3 RD 4 RTS 5 CTS 6 DSR 7 GND 8 CD 20 DTR 22 RI TD 2 RD 3 RTS 4 CTS 5 DSR 6 GND 7 CD 8 DTR20 RI 22 Figure I-1. RS232 Cab...

155 Appendix J - RS-232C Interface Specifications 25 POS MALE DSUB 8 POS. MINI-DIN TD 2 RCV3 RTS 4 CTS 5 GND 7 1 Handshake Out 2 Handshake In 4 GND 8 GND 3 TD 5 RCV 8 7 6 5 4 3 2 1 8 POS. MINI-DIN FEMALE Figure I-4. MAC Cable

157 Appendix J - RS-232C Interface Specifications Functional Description of RS-232C Signals: Transmitted Data - Pin 2, SD (BA) Direction: to modem Signals on this circuit are generated by the customer's terminal and transferred to the transmitter ofthe modem. A positive signal is a space (binary 0) ...

160 MultiModemBL User Guide Appendix K - Regulatory Information Compliance with BABT Requirements Approved for connection to telecommunications system specified in the instructions for use subject tothe conditions set out in them. Warning: Interconnection directly, or by way of other apparatus, of p...

161 Appendix K - Regulatory Information All other apparatus connected to this modem and thereby connected directly or indirectly to theBritish Telecom public switched telephone network must be approved apparatus as defined inSection 22 of the British Telecommunications Act 1984. The Approval Label i...

162 MultiModemBL User Guide International Modem Restrictions Some dialing and answering defaults and restrictions may vary for international modems. Changingsettings may cause a modem to become non-compliant with national telecom requirements inspecific countries. Also note that some software packag...

163 Appendix K - Regulatory Information FCC Regulations for Telephone Line Interconnection 1. This equipment complies with Part 68 of the Federal Communications Commission (FCC) rules.On the outside surface of this equipment is a label that contains, among other information, theFCC registration numb...

164 MultiModemBL User Guide Canadian Limitations Notice Notice: The ringer equivalence number (REN) assigned to each terminal device provides anindication of the maximum number of terminals allowed to be connected to a telephone interface. Thetermination of a interface may consist of any combination...

165 Index Index Symbols &E0 .................................................................... 32&E1 .................................................................... 32&E14 .................................................................. 32&T command ............................