Multi-Tech Systems MT2834BA manuale d’uso

MT2834BA/MT2834BL Series Intelligent Data/Fax Modems User Guide[...]

User Guide S000300B Revision B MultiModem II Models: MT2834BA, MT2834BAI, MT2834BL, MT2834BLI This publication may not be reproduced, in whole or in part, without prior expressed written permission from Multi-Tech Systems, Inc. All rights reserved. Copyright 2004©, by Multi-Tech Systems, Inc. Multi-Tech Systems, Inc. makes no representations or wa[...]

Contents Chapter 1 - Introduction and Description ......................................................................... 5 1.1 Introduction ................................................................................................................ ...................... 6 1.2 How T o Use This Manual .........................................[...]

5.4.1 Dialing Action Commands ................................................................................................... ...... 33 5.4.2 Dial Modifier Commands .................................................................................................... ....... 34 5.4.3 Phone Number Memory Commands ..................................[...]

Chapter 1 - Introduction and Description[...]

Chapter 1 - Introduction and Description Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 6 1.1 Introduction Welcome to the world of data communications. You have acquired one of the finest intelligent desktop data/fax modems available today, the MultiModem II BA/BL series modem, from Multi- Tech Systems. Your MultiModem provides data communi[...]

Chapter 1 - Introduction and Description Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 7 Chapter 6 - S-Registers Chapter 6 covers the modem's S-Registers, which enable the user to establish, read, and modify various modem options. All of the S-Registers are charted and explained, followed by instructions on accessing the S-Registers a[...]

Chapter 1 - Introduction and Description Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 8 1.3.1 MT2834BA/BL Series Features Your MT2834BA/BL modem meets the proposed Enhanced V.34 ITU standard for data signalling rates as high as 33.6/31.2K bps in full duplex mode. Enhanced V.34 is an extension of V.32/V.32bis/ V34 standards, and supports a[...]

Chapter 1 - Introduction and Description Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 9 1.5 T echnical Specifications Your data/fax modem meets the specifications listed below: Tradename MultiModem IITM Model Numbers MT2834BA, MT2834BAI, MT2834BL, MT2834BLI Data Rates (modem) 33,600, 31,200, 28,800, 26,400, 24,000, 21,600, 19,200, 16,800,[...]

Chapter 1 - Introduction and Description Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 10 Fax Modulations V.21CH2 FSK at 300 bps, V.27ter DPSK at 4800 and 2400 bps, V.29 QAM at 9600 and 7200 bps, V.17 TCM at 14400, 12000, 9600, and 7200 bps Transmit Level -11dBm (dial-up), -9 or -15 dBm (leased-line); dBm level selectable with DIP-Switch #[...]

Chapter 1 - Introduction and Description Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 11 1.7 Modem LED Indicators The MultiModem diagnostic LED indicators are shown in Figure 1-1 and Figure 1-2. FX EC TR OH 24 96 14.4 19.2 24.0 28.8 CD RD SD MT2834BA Series Intelligent Modem V oice/ Data Answ Orig Fax V .42 Rdy 2400 9600 14.4K 19.2K 24.0K[...]

Chapter 1 - Introduction and Description Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 12 1.8 Controls on PC Board The MultiModem is designed on a single printed circuit (PC) board. This board contains one 16- position DIP-Switch (numbered 1-16). The DIP-Switches are accessible through a cut-out on the side of the modem. There is also a kn[...]

Chapter 2 - Installation and Connection[...]

Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 2 - Installation and Connection 14 2.1 What Is in Y our Modem Package? Your MultiModem is made up of many components. Make sure you have them all before trying to operate your modem. Your package should include: · MT2834BA or MT2834BL data/fax modem · RJ-11 telephone cord or BS-6312 p[...]

Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 2 - Installation and Connection 15 2. Verify that the ON/OFF switch at the rear of the modem to the OFF (Down) position. 3. For BA: Connect the modem to a dial-up line by attaching the RJ-11 telephone cord (provided with your unit) to the LINE connector on the modem and to a dial-up wal[...]

Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 2 - Installation and Connection 16 2.3 Installing PhoneT ools, the Data Communications Software Data communications software is designed to send and receive messages. Multi-Tech includes a data communications software program, PhoneTools, with your modem. However, the modem will work wi[...]

Chapter 3 - Software Configuration and Modem Basics[...]

18 Chapter 3 - Software Configuration Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 3.1 Introduction Chapter 2 described the installation of PhoneTools, a communications software. If you are using a different software package, there are some points you should take into consideration. Since your communications software configuration is affe[...]

19 Chapter 3 - Software Configuration Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 3.3.1 Changing Default Parameters By default, the modem will answer after the first ring and try to communicate with a modem on the other end of the line. If you have one telephone line for voice, fax, and modem communications, the modem may attempt to answ[...]

20 Chapter 3 - Software Configuration Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 3.5 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 of your modem’s chassis. Right now your modem is [...]

Chapter 4 - Manual Dial and Automatic Answer[...]

22 Chapter 4 - Manual Dial and Automatic Answer Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 4.1 Introduction We’ll assume that yours is the very common application, where you are using a modem to dial up a remote computer. The modem has been factory preset for originating a call to a compatible 33,600 bps modem (also set up for hardwar[...]

23 Chapter 4 - Manual Dial and Automatic Answer Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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's operational and tries to restore the leased line if possible. S-Register S18 determines how often restor[...]

24 Chapter 4 - Manual Dial and Automatic Answer Multi-Tech Systems, Inc. MT2834BA/BL Series 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 both originate and answer calls. To originate calls, you use the automatic dialing capability of the modem's Command mode. To do this[...]

25 Chapter 4 - Manual Dial and Automatic Answer Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 4.8 Automatic Answering The modem can be used as an automatic answering modem. No special modifications or settings are required other than making sure that the Auto-Answer select switch is set to Auto-answer enabled (DIP-Switch #5 UP). The modem,[...]

26 Chapter 4 - Manual Dial and Automatic Answer Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 4.10 Handshaking Details This section briefly explains what happens between two modems in a normal call. We are assuming that there are MultiModems at both the originating and at the answering end of the telephone line. (If other brands of modems [...]

Chapter 5 - Command Mode[...]

28 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 5.1 Introduction AT commands are the means by which you, and your communications software, are able to communicate with and configure your modem. They enable you to establish, read, and modify parameters in addition to dialing. The following provides both a summary a[...]

29 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Dial ( D or A ) command, or incoming phone call Carrier detected HANG UP ON-LINE MODE W AIT FOR CARRIER COMMAND MODE AT 0 Command +++A T No carrier detected Carrier lost Figure 5-1. Functional Modes 5.2 Summary of A T Commands A wide variety of autodial operations an[...]

30 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide STORE MODEM &F Load Factory Defaults CONFIGURATIONS &W Store Configuration & S-Register AND DEFAULTS Parameters Z Reset Modem V Result Code Terse/Verbose $SP UNIX/ "Spoofing” &M Synchronous/Asynchronous Mode Select &X Synchronous Transmit C[...]

31 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide CONFIGURE DATA &E14 Data Compression Disabled COMPRESSION &E15 Data Compression Enabled CONFIGURE SPEED $BA0 Speed Conversion On CONVERSION $BA1 Speed Conversion Off $MB Set modem speed (e.g.,$MB14400) $SB Set serial port speed (e.g.,$SB57600) EXECUTE $ H Hel[...]

32 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 5.3 Result Codes The Command mode provides you with several responses, or “Result Codes” , that can aid you in Command mode operation. These Result Codes are displayed on your monitor. You can choose result codes that closely match those of the standard AT comman[...]

33 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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[...]

34 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide To activate DTR Dialing, enter AT$D1 and hit RETURN. The modem dials the phone number stored in the N0 location of memory when it receives a high DTR signal. DTR must remain high for the duration of the call, until disconnect. To deactivate DTR dialing, enter AT$D0 a[...]

35 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Automatic Pauses in Dialing , You can cause the modem to pause during the dialing sequence by entering a comma character where the pause is desired. This pause lasts two seconds. If a longer pause is desired, more than one comma may be entered consecutively, with eac[...]

36 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide "Calling Card" Detect Tones $ The modem has the capability to detect AT&T "calling card" tones for the purpose of utilizing the user's calling card number to originate an on-line connection. An $ symbol placed in the dialing string causes[...]

37 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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’s number memory. As many as ten of these numbers may be stored. Each number will be given a name, using the codes[...]

38 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series 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/write Random Access Memory (RAM) memory. The &[...]

39 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Unix UUCP Spoofing $SP The modem can be configured in a Unix environment that employs ACK flow control as a means of monitoring data integrity. The modem can do “UUCP spoofing” , where the modem is able to generate ACKs at the DTE interface. Data is transmitted m[...]

40 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series 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 be configured to echo back characters entered while in the Command Mode in order for them to be disp[...]

41 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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 to select various response combinations related to these methods. You can choose to have certain res[...]

42 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 5.4.6 Phone Line Conditioning Commands Guard Tones (Not Used in BAI/BLI Models) &G The &G command is used to control the presence or absence of guard tones from the transmitter when in Answer mode, at either 1200 or 2400 bps. Guard tones are used in Europe an[...]

43 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Fallback Modes When On-Line #F If line conditions deteriorate, the modem automatically drops its transmission speed ( “fallback” ). The #F command controls the different ways the modem falls back. During operation, if the error rate becomes too great, the modem p[...]

44 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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,[...]

45 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series 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 the RS-232C interface. You have three choices. You can force the signal high, allow it to act normally, or set it to stay high until the mo[...]

46 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 5.4.8 Error Correction Commands You can use AT commands to place your modem one of three V.42 (error correction) modes of operation. These are the Normal, Auto-Reliable, and Reliable modes. Normal Mode &E0 In Normal mode of operation, the modem’s V.42 error cor[...]

47 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide V.42 Mode Select #L 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 modem uses for transmissions. The various #L command options are[...]

48 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Enable/Disable Auto Reliable Fallback Character $F 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[...]

49 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series 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 to and from each other. Flow control is necessary so that a device does not receive more data than it can handle. In the case of the MultiM[...]

50 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Xon/Xoff Pass-Through &E7 So far, you have had three choices to make regarding pacing: 1. You can set the modem to respond to Xon/Xoff pacing. 2. You can set the modem to respond to RTS pacing. 3. You can set the modem to ignore pacing completely. Well, we’re n[...]

51 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Normal Mode Modem Flow Control On &E11 When two MultiModems are connected in Normal mode (not using error correction), Xon/Xoff can be used to control the flow of data between the modems. Flow Control can be turned on or off with the Normal Mode Modem Flow Contro[...]

52 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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 [...]

53 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 5.4.1 1 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 modem to communicate at one speed [...]

54 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Serial Port Baud Rate $SB The $SB command presets the speed of the modem’s serial (RS-232C) 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 for 1932 and 2834 models, and 5[...]

55 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 5.4.12 Immediate Action Commands Help Screens $H The Help command is designed to give you short explanations on how to use each modem command. The Help command can be quite useful if your manual is not handy and you are in the middle of a communications session. Alth[...]

56 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Listing On-Line Diagnostics L8 The L8 command displays the current on-line CONNECT status of the modem. This display can be printed and used as a modem status report or as diagnostic information (such as when calling Tech Support). To activate this command first type[...]

57 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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 Command mode and into On-Line Answer mode, and causes it to transmit its carrier signal over th[...]

Chapter 6 - S-Registers[...]

59 Chapter 6 - S-Registers Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 6.1 Introduction Certain Command Mode configurations are stored in memory registers called, S-Registers. The S command is used to assign a value to, and to read the current value of an S-Register. To assign a value to an S-Register, enter the letter S , followed by th[...]

60 Chapter 6 - S-Registers Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide S4 Line Feed Character Unit: ASCII Character Range: 0-127 Default: 10 (^J) Description: S4 defines the character recognized as Line Feed. S3 may be set for any ASCII character. S5 Backspace Character Unit: ASCII Character Range: 0-127 Default: 8 (^H) Description: S5 d[...]

61 Chapter 6 - S-Registers Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide S9 Carrier Detect Response Time Unit: 100 mSec. Range: 1-255 Default: 6 Description: S9 sets the time delay between when the modem first detects a valid incoming carrier signal and when the modem turns on its Carrier Detect circuit. The default setting is 600 millisec[...]

62 Chapter 6 - S-Registers Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide S15 Callback Time Delay Unit: Seconds Range: 10-255 Default: 20 Description: S15 defines the time delay between Callback attempts after initial passwords have been exchanged between modems. S16 Callback Attempts Unit: 1 Attempt Range: 1-255 Default: 4 Description: S16[...]

63 Chapter 6 - S-Registers Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide S24 PBX/CBX Disconnect Drop Time for DSR/CTS/CD Unit: 50 mSec. Range: 0-255 Default: 20 Description: Some PBX and CBX phone systems require the modem’s DSR, CTS, and/or CD signal(s) to behave in a certain manner when calls are disconnected. The modem’s &R , &a[...]

64 Chapter 6 - S-Registers Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide S30 Inactivity Timer Unit: 1 min. Range: 0-255 Default: 0 Description: S30 causes the modem to disconnect if no data is transmitted or received for a specified time. This timer runs during both Reliable and Normal error correction connections. The timer restarts any t[...]

65 Chapter 6 - S-Registers Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide S48 Program V.34bis Connect Speeds Unit: N/A Range: 33, 31, 28, 26, 24, 21,19,16,14,12, 96 and 48 Default: 0 Description: Defines which speed modem connects within the scope of Enhanced V.34 mode (e.g., S48 = 26 means maximum connect speed is 26.4K). This register com[...]

66 Chapter 6 - S-Registers Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 6.2 Reading and Assigning S-Register V alues The S command is used to assign a value to, and to read the current value of, an S-Register. To read an S-Register value, enter the letter S followed by the S-register number and a question mark ( ? ), then hit RETURN. For [...]

67 Chapter 6 - S-Registers Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 6.3 A T Command and S-Register Summary The vast majority of installations are similar, with the modem being used to dial up a remote installation where the call is automatically answered. Your modem has a default configuration to dial another modem that supports error[...]

Chapter 7 - Callback Security and Remote Configuration[...]

69 Chapter 7 - Callback Security and Remote Configuration Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 7.1 Introduction This chapter describes how the MultiModem’s Callback and Remote Configuration features operate. These features use a multilevel security system, which involves the use of LOGIN Passwords, Setup Passwords and Remote Esc[...]

70 Chapter 7 - Callback Security and Remote Configuration Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 7.3 Remote Configuration Description The Remote Configuration feature is a network management tool that allows you to configure modems remotely. This means you could configure modems anywhere in your network from one location without hav[...]

71 Chapter 7 - Callback Security and Remote Configuration Multi-Tech Systems, Inc. MT2834BA/BL Series 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 and hit RETURN. You must turn on Callback Security to be able to enter dial back [...]

72 Chapter 7 - Callback Security and Remote Configuration Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide The + and/or - characters entered before the phone number are optional. The + (Deposit Number) code allows a caller to enter the number he or she wishes the Callback modem to call back when the caller uses a particular password (Step 3 o[...]

73 Chapter 7 - Callback Security and Remote Configuration Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 7.3.2 Remote Configuration Procedures The procedures for using the Remote Configuration features are the same whether or not a call originates from the remote modem. Once the modem is on-line, perform the procedures in Table 7-4. Table 7[...]

74 Chapter 7 - Callback Security and Remote Configuration Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 7.4 Remote Configuration and Callback Security A T Commands When you have callback security enabled for the modem, anyone trying to connect with the modem will be required to furnish a password. The #CBN command allows you to enter passw[...]

75 Chapter 7 - Callback Security and Remote Configuration Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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 escap[...]

Chapter 8 - DIP-Switch Settings[...]

77 Chapter 8 - Dip-Switch Settings Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 8.1 Introduction There are several DIP-Switch options on the modem’s printed circuit (PC) board. The DIP-Switches are accessible through a cut-out on the side of the modem. This chapter explains the modem’s printed-circuit board options. Sixteen DIP-Switch[...]

78 Chapter 8 - Dip-Switch Settings Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 8.2 DIP-Switch Option Settings Switch #1 Forced 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 the terminal or computer to which it is attach[...]

79 Chapter 8 - Dip-Switch Settings Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Switch #3 dB Transmission Levels (Asynchronous/Synchronous Mode/Leased Line) DIP-Switch #3 adjusts dB transmission levels required by some phone carriers. Place DIP-Switch #3 in the DOWN position to enable -9 dB transmission. Place DIP-Switch #3 in the UP posi[...]

80 Chapter 8 - Dip-Switch Settings Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Switch #5 Originate/Answer Mode (Asynchronous/Synchronous Mode/Leased Line) The modem functions in either Originate mode or Answer mode. Place DIP-Switch #5 in the DOWN position to enable Originate mode. Place DIP-Switch #5 in the UP position to enable Answer [...]

81 Chapter 8 - Dip-Switch Settings Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Switch #8 Enable/Disable Command Mode -- "Com" (Asynchronous/Synchronous Mode/Leased/Dial-Up) In some applications you may want to disable the modem's Command mode so that the modem does not recognize or react to AT or V.25 bis commands. This ma[...]

82 Chapter 8 - Dip-Switch Settings Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Switch #11 Internal/External Clocking (Synchronous Mode/Leased Line/Dial-Up) In Synchronous mode, the transmit clock can be supplied by the DTE on pin 24 of the RS-232C/V.24 interface by placing DIP-Switch #11 UP. Place DIP-Switch #11 in the DOWN position to e[...]

83 Chapter 8 - Dip-Switch Settings Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Switch #16 (MT2834BA Only) (Reserved for Future Use) Switch #16 (MT2834BL Only) 2 Wire/4 Wire Operation (Asynchronous/Synchronous Mode) The modem works over either 2-wire or 4-wire leased lines. To select 4-wire operation, place Switch #16 DOWN (Default); and [...]

84 Chapter 8 - Dip-Switch Settings Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 8.4 Recording Option Configurations This section lets you record any changes you may have made to the DIP-Switch settings. Circle the appropriate setting and record the effect for future reference. DIP-Switches Switch Function Position Effect #1 Force DTR/DTR [...]

85 Chapter 8 - Dip-Switch Settings Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide DIP Switches #13-14 Note: The modem baud rate command ( $MBn ) overrides the setting of these speed selection switches (DIP switches #13 and #14). SWITCH CONDITION EFFECT #13/#14 UP/UP* 28.8 K bps Operation #13/#14 DOWN/UP 19.2 K bps Operation #13/#14 UP/DOWN [...]

Chapter 9 - W arranty , Service and T ech Support[...]

87 Chapter 9 - Warranty, Service, and Technical Support Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 9.1 Introduction This chapter starts out with statements about your modem's warranty and repair procedures. The next sections cover online warranty registration, replacement parts, and technical support. 9.2 Multi-T ech Systems, Inc. [...]

88 Chapter 9 - Warranty, Service, and Technical Support Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Please direct your questions regarding technical matters, product configuration, verification that the product is defective, etc., to our Technical Support department at (800) 972-2439 or email tsupport@multitech.com. Please direct your qu[...]

89 Chapter 9 - Warranty, Service, and Technical Support Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 9.4 Replacement Parts SupplyNet, Inc., can supply you with replacement power supplies, cables and connectors for selected Multi-Tech products. You can place an order with SupplyNet via mail, phone, fax or the Internet at the following addr[...]

Appendixes[...]

91 Appendix A - Upgrading Your Modem’s Firmware Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix A - Upgrading Y our Modem’ s Firmware Your modem is controlled by semi-permanent software, called firmware , which is stored in flash memory. Firmware is nonvolatile; that is, it remains stored in memory when the modem is turned off. [...]

92 Appendix A - Upgrading Your Modem’s Firmware Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 4. If the firmware version number matches the firmware version number found in “Step 1: Identify the Modem Firmware,” you have the current firmware version and do not need to be update. 5. If the firmware version number is greater than the f[...]

93 Appendix A - Upgrading Your Modem’s Firmware Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 4. Type AT&W1Z and press E NTER to clear your stored parameters and reset your modem to factory default. 5. Close the terminal program. Step 6: Upgrade the Modem’s Firmware Before you begin the following procedure, read the README.TXT file[...]

94 Appendix B - Troubleshooting Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix B - T roubleshooting Your modem was thoroughly tested at the factory before it was shipped. If you are unable to make a successful connection or if you experience data loss or garbled characters during your connection, it is possible that the modem is de[...]

95 Appendix B - Troubleshooting Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide · If you don’t get an OK , the problem may still be in the communications software. Make sure you have done whatever is necessary in your software to make a port connection. Not all communications programs connect to the COM port automatically. Some connect wh[...]

96 Appendix B - Troubleshooting Multi-Tech Systems, Inc. MT2834BA/BL Series 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[...]

97 Appendix B - Troubleshooting Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide The Modem Disconnects While On-line · If you have call waiting on the same phone line as your modem, it may interrupt your connection when someone tries to call you. If you have call waiting, disable it before each call. In most telephone areas, you can disable [...]

98 Appendix B - Troubleshooting Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide I Am Getting Garbage Characters on the Monitor · Your computer and the remote computer may be set to different word lengths, stop bits, or parities. If you have connected at 8-N-1, try changing to 7-E-1, or vice-versa, using your communications software. · You [...]

99 Appendix C - AT Command Summary Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix C - A T Command Summary Command Values Description AT Attention Code that precedes most command strings except A/, A: and Escape Codes. RETURN Pressing RETURN key executes most commands. $ This symbol placed in dialing string enables the modem to dete[...]

100 Appendix C - AT Command Summary Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Command Values Description D s N d s = phone # Store telephone number. To store, phone d = 0 thru 9 number ”s“ is entered and followed by N and then Directory Number “d.” &D n n = 0 thru 3 &D0 DTR is ignored &D1 means modem returns to comm[...]

101 Appendix C - AT Command Summary Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide &F n n = 0, 8 or 9 &F loads factory default values from ROM. * &F8 reads factory default values and switch settings when &F is issued. &F9 reads parameters stored in non-volatile memory when &F is issued. $F n n = 0 or 1 $F0 means do n[...]

102 Appendix C - AT Command Summary Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide $MB n n = speed $MB75 selects CCITT V.23 mode. $MB300 selects 300 bps on-line. $MB1200 selects 1200 bps on-line. $MB2400 selects 2400 bps on-line. $MB4800 selects 4800 bps on-line. $MB9600 selects 9600 bps on-line. $MB14400 selects 14400 bps on-line $MB19200 [...]

103 Appendix C - AT Command Summary Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide $SB n n = speed $SB300 selects 300 bps at serial port. $SB1200 selects 1200 bps at serial port. $SB2400 selects 2400 bps at serial port. $SB4800 selects 4800 bps at serial port. $SB9600 selects 9600 bps at serial port. $SB19200 selects 19,200 bps at serial po[...]

104 Appendix C - AT Command Summary Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide X n n = 0,1,2,3 or 4 * X0 selects Basic Result Codes (w/o CONNECT 1200, CONNECT 2400). X1 selects Extended Result Codes (w/CONNECT 1200, CONNECT 2400). X2 selects Standard AT Command set with NO DIAL TONE. X3 selects Standard AT Command set with BUSY. X4 sele[...]

105 Appendix C - AT Command Summary Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Callback Security/Remote Configuration Command Summary Command Description #DBn #DB0 disables Callback Security and answering Yes to the prompt turns off Callback Security and erases stored phone numbers and passwords. Answering No to the prompt aborts the co[...]

106 Appendix C - AT Command Summary Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Password Command Summary Command Description #Ixxxxxxxxxx Login Password is any keyboard characters (x) (upper/lower case sensitive), minimum 6 and maximum 10 characters. The default Login Password is #IMULTI-TECH . #Syyyyyyyyyy Setup Password is any keyboard[...]

107 Appendix D - V.25bis Operation Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix D - V .25bis Operation Chapter 4 described a set of commands which let the modem dial, hang-up, and be configured for various applications. However, these commands, the AT command set, are only functional when the DTE transmits data asynchronously. Th[...]

108 Appendix D - V.25bis Operation Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide V.25bis Set-Up and Initialization Before you operate your modem in the V.25 bis mode, you need to make sure it is set up properly (various RS-232 lines such as DSR and CTS act as specified in the V.25 bis standard). Setup involves proper DIP-Switch settings an[...]

109 Appendix D - V.25bis Operation Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide V.25bis Responses (Result Codes) When in V.25 bis mode (the AT$V1 command executed), your modem provides you with several responses which can help you follow the progress of V.25 bis operations. These are similar to the Result Codes associated with AT Command [...]

110 Appendix D - V.25bis Operation Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Dial Phone Number Provided (CRN) Command The CRN command permits the dialing of the phone number immediately following it (from the command line). It is similar to the D command, except that the number is first checked against the Delayed Number and Forbidden [...]

111 Appendix D - V.25bis Operation Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide ITU V.25bis Country Specific Information Due to the flexibility of the V.25 bis standard, each country may establish specific regulations governing the way operations are handled. The purpose of this document is to detail each country's specific regulatio[...]

112 Appendix D - V.25bis Operation Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 5. Belgium a) Command/Indication modification (none) b) Delay and Forbidden list behavior 1. 1 min. delay between calls 2. After 4 retries, the number is put on the forbidden list 3. The number remains on the forbidden list for 1 hour after entry to forbidden [...]

113 Appendix E - MultiModemBA/BL Cables Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix E - MultiModemBA Cables These cables connect your modem to your terminal or computer’s serial port. 25-PIN DTE Connector 25-PIN DCE Device 2T D 3R D 4R T S 5 CTS 6 DSR 7 GND 8C D 20 DTR 22 RI TD 2 RD 3 RTS 4 CTS 5 DSR 6 GND 7 CD 8 DTR 20 RI 22 [...]

114 Appendix F - Regulatory Information Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix F - Regulatory Information 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 harmf[...]

115 Appendix F - Regulatory Information Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Canadian Limitations Notice Notice: The ringer equivalence number (REN) assigned to each terminal device provides an indication of the maximum number of terminals allowed to be connected to a telephone interface. The termination on an interface may consis[...]

116 Appendix F - Regulatory Information Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 7. Some parameters required for compliance with Telecom’s Telepermit requirements are dependent on the equipment (PC) associated with this device. The associated equipment shall be set to operate within the following limits for compliance with Telecom?[...]

117 Index Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Index Symbols 2 Wire/ 4 Wire Operation .................................... 83 2 Wire/4 Wire Operation ..................................... 83 A Abort T imer ......................................................... 60 Answer Mode .....................................................[...]

118 Index Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Enable/Suppress Responses .............................. 7 8 Erase Callback Password (#RCBNxx) ................ 7 4 Erase Callback Phone Number (#RDNxx) ........... 7 4 Error Correction .................................................... 9 Escape Code Character ......................[...]

119 Index Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Parity .................................................................. 1 8 Parity Selection (#P) ........................................... 5 1 Password Command Summary ........................ 1 0 6 Pause T ime for Comma ...................................... 6 0 PBX/CBX Disconne[...]