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Appendix J - RS-232C Interface Specifications

External Transmit Clock - Pin 24, XTC

Direction: to modem

Supplies the same function as transmit clock on Pin 15.

Terminal Busy (Out of Service) - Pin 25, OOS

Direction: to modem

The Terminal Busy (OOS) circuit is not defined in the RS-232C standard, but is used by us and most
manufacturers to make the phone lines busy to incoming phone calls. Pin 25 is not normally
connected to the RS-232C interface when shipped from the factory; it can be ordered connected as
an option. If pin 25 is connected and is brought high, the modem will be placed Off Hook, and busy to
incoming calls.

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Содержание MultiModem II BA-Series

Страница 1: ...BA Series Intelligent Data Fax Modem User Guide...

Страница 2: ...on of such revisions or changes Record of Revisions A 6 1 99 Manual revised Manual reformatted for electronic distribution All pages remain at Revision A Trademarks of Multi Tech Systems Inc are as fo...

Страница 3: ...for Use 25 Chapter 3 Software Configuration and Modem Basics 3 1 Introduction 28 3 2 Serial Port Limitations 28 3 2 1 How Can You Identify Your UART Type 28 3 2 2 The 16550 UART and Windows 3 1 29 3 3...

Страница 4: ...ol Commands 61 5 4 8 Error Correction Commands 63 5 4 9 Flow Control Commands 66 5 4 10 Compression Error Correction Flow Control Pass Through and Pacing Commands 69 5 4 11 Speed Conversion Commands 7...

Страница 5: ...tion 118 10 2 Limited Warranty 118 10 2 1 On line Warranty Registration 118 10 3 Tech Support 119 10 3 1 Recording Modem Information 119 10 4 Service 119 10 5 The Multi Tech BBS 120 10 5 2 Upgrading t...

Страница 6: ...vi...

Страница 7: ...Chapter 1 Introduction and Description...

Страница 8: ...e The information contained in each chapter and appendix is as follows Chapter 1 Introduction and Description This chapter begins with a short introduction followed by a guide which you are now readin...

Страница 9: ...Local Analog Loopback Digital Loopback and Remote Digital Loopback Tests We have included a description of each test and how to use each test procedure Chapter 9 DIP Switches Chapter 9 covers the mode...

Страница 10: ...ic symbol rate and carrier frequency during start up and retrain and rate renegotiation in 2400 bps increments The MT2834BA features ITU V 25bis standard for synchronous dialing ITU V 42 error correct...

Страница 11: ...fax machine or modem it can transmit faxes at 14 4 K bps It also meets the ITU s Group 3 Designation for sending and receiving faxes at 9600 bps and Group 2 Designation for sending and receiving faxes...

Страница 12: ...1 200 33 600 bps 1432 Series Serial binary asynchronous at 0 300 1200 2400 4800 7200 9600 12 000 14 400 bps synchronous at 1200 2400 4800 7200 9600 12 000 14 400 bps 932 Series Serial binary asynchron...

Страница 13: ...dial linking pulse or tone dial dial tone detection dial pauses call status display auto parity and data rate selection keyboard controlled modem options nonvolatile memory and on screen displays for...

Страница 14: ...for Transmit Originate 2225 Hz Mark 2025 Hz Space for Receive Originate 2225 Hz Mark 2025 Hz Space for Transmit Answer 1270 Hz Mark 1070 Hz Space for Receive Answer Carrier Frequencies V 21 All model...

Страница 15: ...Carrier Detect Speed Indicators Off Hook Terminal Ready Error Correction Fax and Error Controls All models Toggle switches for Voice Data with Originate or Answer Power On Off and DIP Switches for va...

Страница 16: ...Data Answ Orig Figure 1 1a MT2834 LED Display Figure 1 1b MT1432 LED Display Figure 1 1c MT932 LED Display SD Send Transmit Data This LED blinks when data is being transmitted on for a space off for...

Страница 17: ...dialing in Command mode TR Terminal Ready When the TR LED is lit the modem is permitted to answer an incoming call When it goes off a connected modem will disconnect The state of the TR LED matches t...

Страница 18: ...18 MultiModemBA User Guide...

Страница 19: ...Chapter 2 Installation and Connection...

Страница 20: ...9600 14 4K 19 2K 24 0K 28 8K Carr Rcv Send MT2834BA Series Intelligent Modem Voice Data Answ Orig Figure 2 1 Unpacking MT2834BA shown Your package should include MT2834BA MT1432BA or MT932BA data fax...

Страница 21: ...orts which are connecting to other apparatus are defined as SELV To ensure conformity with EN 41003 ensure that these ports are only connected to the same type on other apparatus 2 2 2 Installation Pr...

Страница 22: ...the PHONE connector on the modem and plug the other end into your telephone Refer to Figure 2 2 6 Attach the AC Power transformer provided with your unit to the POWER connector on the modem and to a...

Страница 23: ...sired language and click Next to proceed 3 Click Next to proceed with the default country United States or select the country in which you are installing and click Next to proceed The Trio Welcome scr...

Страница 24: ...shed loading the following dialog is displayed 12 Choose Manual Selection of Modem and Ports then click Next Dialog The following dialog is displayed 13 In the Com Port Selection group select the COM...

Страница 25: ...click the Exit icon on the installation screen to exit the installation program 2 4 Is Your Modem Ready for Use As soon as you have connected power to the modem if you are an experienced modem user y...

Страница 26: ...26 MultiModemBA User Guide...

Страница 27: ...Chapter 3 Software Configuration and Modem Basics...

Страница 28: ...ly up to a maximum of 115 200 bps If your serial port cannot handle these speeds we recommend that you replace your present serial card with one that has a 16550AFN UART or equivalent Macintosh comput...

Страница 29: ...Your Software Communications software must be configured to work with your modem your computer and the remote system it is calling Fortunately most communications programs make the process easy by pro...

Страница 30: ...wer 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 answer all inco...

Страница 31: ...with another modem When V 42bis data compression is enabled you must have a serial port baud rate four times the transmission speed of the modem to fully optimize compression So if your UART is fast...

Страница 32: ...ng as follows AT F S0 0 X4 E14 M As a general rule you should try to transmit files in already compressed form rather than relying on V 42bis hardware compression Because software compression is more...

Страница 33: ...k whether your modem is operational If everything s fine your modem will respond OK Note refer to Chapter 4 for additional details on Dialing Automatic Answering Dial Back Up and Automatic Leased Line...

Страница 34: ...34 MultiModemBA User Guide...

Страница 35: ...Chapter 4 Manual Dial and Automatic Answer...

Страница 36: ...be entered in upper or lower case Entering AT automatically sets the modem s speed to match the speed of the computer or terminal and also sets the modem s parity The AT characters alert the modem th...

Страница 37: ...nd your data communications begins Note that the modem may call manually via the keyboard command ATD or by pressing the Voice Data switch on the modem s front panel downward To force the modem to aut...

Страница 38: ...our keyboards 4 6 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 answe...

Страница 39: ...ode When OH Off Hook comes on the called modem starts a forty five second timer and waits for a carrier signal from the originating modem If carrier is not detected within this period the modem discon...

Страница 40: ...40 MultiModemBA User Guide...

Страница 41: ...Chapter 5 Command Mode...

Страница 42: ...e changed to any other ASCII character with S Register S5 If you wish to cancel an entire command that has been entered but not yet executed enter CTRL X This also clears the command buffer The effect...

Страница 43: ...ons the call and re enters Command mode Once on line the modem exits On line mode if one of two conditions is met If the carrier is lost or intentionally dropped the modem hangs up and re enters Comma...

Страница 44: ...erse Mode of Operation Flash On Hook AT T Calling Card Tones Quiet Answer MEMORIZE PHONE NUMBERS D N Store Phone Numbers NN Number Linking L List Numbers Stored in Memory STORE MODEM F Load Factory De...

Страница 45: ...iple Xoff Characters E8 Enq Ack Off E9 Enq Ack On E10 Normal Mode Modem Flow Control Off E11 Normal Mode Modem Flow Control On E12 Computer Initiated Off E13 Computer Initiated On BS Maximum Block Siz...

Страница 46: ...Display of Noise Information RP Initiates Retrain to Read Line Probe Parameters READ AND Sr Read Current S Register Value ASSIGN Sr Assign S Register Value S REGISTER VALUES REMOTE CBN Passwords for C...

Страница 47: ...the result codes generated by the Q command refer to Appendix G for Result Code Summary Multi Tech Result Codes 2834 Series TERSE VERBOSE TERSE VERBOSE 0 OK 11 CONNECT 4800 1 CONNECT 12 CONNECT 9600...

Страница 48: ...0 8 NO ANSWER 31 CONNECT 31200 10 CONNECT 2400 33 CONNECT 33600 1432 Series TERSE VERBOSE TERSE VERBOSE 0 OK 8 NO ANSWER 1 CONNECT 10 CONNECT 2400 2 RING 11 CONNECT 4800 3 NO CARRIER 12 CONNECT 9600 4...

Страница 49: ...see X3 or X4 command you can command the modem to continuously redial up to 10 re dials for DOC units a busy number until your call is answered This is done with the A command This command would be u...

Страница 50: ...oth methods Pulse dialing is a method used by rotary dial telephones which involves the timed opening and closing of line relay Tone dialing is the method used by push button touch tone telephones and...

Страница 51: ...pause automatically In order for this command to work you must select Wait For Dial Tone dialing with the X2 or X4 command so that your modem will be able to detect the dial tone Return to Command Mod...

Страница 52: ...1028806127853500 123456789 access phone number credit card number Quiet Answer The command causes the modem to wait before processing the next symbol in the dialing string The wait is for one or more...

Страница 53: ...er automatically if the first number dialed is busy This would be useful in a situation where a computer can be accessed through more than one phone number This is called linking To link the number in...

Страница 54: ...F command The modem is shipped from the factory with a pre configured set of command and S Register default settings This set of factory defaults can be recalled by issuing the F command In addition t...

Страница 55: ...e modem defaults to M0 asynchronous communications on reset or power up Synchronous Transmit Clock Select X The X command selects the Synchronous Transmit Clock Source in conjunction with DIP Switch 1...

Страница 56: ...the No Response Answer mode ATQ2 selects the No Response Answer mode If you do not select any mode the factory default setting enable Result Codes is automatically selected Result Codes Multi Tech or...

Страница 57: ...This capability smart dialing allows the modem to wait for a dial tone and when one is detected to begin dialing immediately The modem also can detect a distant busy signal if after dialing it reaches...

Страница 58: ...e Monitoring Speaker M The modem has an internal on board speaker which functions like the speaker in a telephone handset to enable you to monitor phone line activity The M command can be used to dete...

Страница 59: ...834 Series 33 6K to 31 2K to 28 8K to 26 4K to 24K to 21 6K to 19 2K to 16 8K to 14 4K to 12K to 9 6K to 4 8K bps 1432 Series 14 4K to 12K to 9 6K to 4 8K bps 932 Series 9 6K to 4 8K bps The AT F2 com...

Страница 60: ...300 bps 1432 Series 14 400 bps with fallback to 9600 to 4800 to 2400 to 1200 and to 300 bps 932 Series 9 600 bps with fallback to 4800 to 2400 to 1200 and to 300 bps Entering AT A1 causes 2834 Series...

Страница 61: ...functions DTR can be used to trigger a dialing sequence called DTR Dialing The condition of DTR can also be used to cause the modem to reset to its default parameters just as if you had given the mode...

Страница 62: ...rop time to be something other than one second use S Register S24 to change this value Refer to Chapter 6 CTS RTS Interaction Control RF In typical operation Clear to Send follows Request to Send when...

Страница 63: ...oes through normal handshaking procedures just like any dial up modem After establishing the on line connection the modem transmits a Link Request message to the answering modem The Link Request messa...

Страница 64: ...M error correction and disables MNP This command is for Originate mode only Answer mode still accepts MNP or LAP M L3 Command In the prior commands the modems use a two phase process to establish a V...

Страница 65: ...URN received The factory default is F0 Retransmit Count R If errors are received during a Reliable connection the modem re sends the block of data which contained an error With the R0 command if anoth...

Страница 66: ...tiated Flow Control Pacing RS 232 V 24 Computer or Terminal Modem Data Flow Figure 5 2 Flow Control and Pacing Hardware Flow Control E4 With Hardware Flow Control the modem uses its RS 232C interface...

Страница 67: ...used to control the flow of data between the modems Flow Control can be turned on or off with the Normal Mode Modem Flow Control commands When the modems are connected in Reliable mode a different me...

Страница 68: ...or the modem to be set for Pacing On a modem initiated method of flow control must be previously selected Once this is done the modem will respond to either Xon Xoff commands or to the toggling of the...

Страница 69: ...dem responds to Xon Xoff characters but does not allow Xon Xoff characters to pass through to remote site E7 Modem responds to Xon Xoff characters and allows them to pass through to remote site X0 Sel...

Страница 70: ...To turn Speed Conversion ON enter the command AT BA0 and hit RETURN To turn Speed Conversion OFF enter AT BA1 and hit RETURN The modem will now match its RS 232C speed to that of the computer and wil...

Страница 71: ...1200 1200 bps AT MB2400 2400 bps AT MB4800 4800 bps AT MB9600 9600 bps AT MB14400 14400 bps The factory default is 14400 bps 932 Series AT MB75 CCITT V 23 AT MB300 300 bps AT MB1200 1200 bps AT MB2400...

Страница 72: ...venient way to switch the serial port speed and still make it easy to go back to the original speed automatically the next time the modem is powered up or reset with an ATZ command The command to set...

Страница 73: ...ntered the modem responds with MT2834BA MT1432BA or MT932BA depending on model Windows 95 Autodetect Inquiry I9 2834 Series only This read command permits a Windows 95 operating system to query the MT...

Страница 74: ...xecutes the command if any and then remain in Command mode For example to hang up the modem at the end of a call enter ATH and hit RETURN There is no need to incorporate pauses before and after the pl...

Страница 75: ...assed between the modems to identify impairments in the telephone channel e g Receive Signal Strength vs Frequency Noise vs Frequency and Signal to Noise Ratio vs Frequency After receiving the results...

Страница 76: ...76 MultiModemBA User Guide...

Страница 77: ...Chapter 6 S Registers...

Страница 78: ...first ring The maximum number of rings that can be configured is 255 Setting the value to zero 0 disables auto answer completely S1 Rings Which Have Occurred Unit 1 ring Range 0 255 Default 0 Descrip...

Страница 79: ...Default 45 Description S7 defines the Abort Timer lack of carrier delay time The default value is 45 seconds Decimal 45 This means that after dialing the modem waits for a carrier signal for up to 45...

Страница 80: ...less S11 Tone Dialing Tone Spacing and Duration Unit 1 mSec Range 1 255 80 255 Default 70 80 Description S11 sets the speed of tone dialing spacing and tone duration times The default value is 70 uni...

Страница 81: ...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 m...

Страница 82: ...on or dialing i e no AT commands can be sent until the LOGIN and SETUP passwords have been entered S30 Inactivity Timer Unit 1 min Range 0 255 Default 0 Description S30 causes the modem to disconnect...

Страница 83: ...fault setting of S36 0 DTR Busy Out is disabled i e DTR won t Busy Out S37 Time Between DTR Active and Modem On Hook Unit 1 Second Range 0 255 seconds Default 5 Description S37 sets the time between D...

Страница 84: ...pauses five seconds for a comma in a dial command 2 In a second example let s say that you wish to configure the modem to answer incoming calls after the 30th ring instead of after the first ring To...

Страница 85: ...r AT W causes the modem to store its current parameters in its nonvolatile RAM The command also sets the modem upon power up or when it is reset with an ATZ command the modem reads all of its configur...

Страница 86: ...86 MultiModemBA User Guide...

Страница 87: ...Chapter 7 Callback Security and Remote Configuration...

Страница 88: ...rotects your network from unauthorized access and helps control long distance costs By use of Callback Passwords and dial back phone numbers you can have your modem dial back remote locations immediat...

Страница 89: ...s to the features used for configuring the modem Because the defaults are in the modem owner s manual and anyone can find out what they are you should change the codes as the first step of your initia...

Страница 90: ...ollowing AT Ixxxxxxxxxx CR xxxxxxxxxx from Table 7 1 Enter your modem s Setup Password as selected in Table 7 1 by entering the following AT Syyyyyyyyyy CR yyyyyyyyyy from Table 7 1 2 Enable the Callb...

Страница 91: ...dem s Setup Password as selected in Table 7 1 by entering AT Syyyyyyyyyy CR yyyyyyyyyy from Table 7 1 Table 7 3 Callback Operational Sequence Procedures Perform the following steps when dialing into a...

Страница 92: ...de 2 COMMAND Mode 2 You then select 1 or 2 With 1 the modem goes back into data mode and with 2 the modem responds with the following Password 3 Enter your Setup Password and if the code is correct th...

Страница 93: ...ack security by typing AT DB1 or AT DB2 and pressing CR If you want to engage both remote and local password security use the DB1 command This sets up the modem so you have to provide passwords to dia...

Страница 94: ...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 specifi...

Страница 95: ...f Callback attempts after initial passwords have been exchanged between modems Unit 1 Attempt Range 1 255 Default 4 Failed Password Attempts S26 S26 counts the number of times there has been a failed...

Страница 96: ...96 MultiModemBA User Guide...

Страница 97: ...Chapter 8 Modem Testing...

Страница 98: ...e modem s transmitter and receiver circuits are functioning properly The Digital Loopback Test local manual allows you to verify that the remote computer or terminal the remote modem serial ports the...

Страница 99: ...message if responses are enabled enter data from your keyboard For this test typing multiple upper case U characters is a good way to send an alternating test pattern of ones and zeros 4 For a more co...

Страница 100: ...e AT and hit ENTER you should get an OK message 2 Dial the remote modem by entering the Dial command and the phone number to establish On line mode 3 Type the Escape Sequence AT CR or BREAK AT CR whic...

Страница 101: ...l the remote modem by entering the Dial command and the phone number to establish On line mode Note The T4 command must be set on the remote modem to run this test Computer or Terminal Local MultiMode...

Страница 102: ...DIP Switch 5 UP and the other modem to Originate enabled DIP Switch 5 DOWN Note it does not matter which modem local remote is set to Answer Originate just so they are set opposite 6 Set DIP Switch 3...

Страница 103: ...onous mode You then compare the test characters multiple upper case U characters in Figure 8 5 on your monitor with the characters you typed If the characters don t match check your computer s COM por...

Страница 104: ...certain that you are set up for Synchronous operation by placing DIP Switch 12 in the UP position To initiate the Digital Loopback Test local manual DIP Switch 9 must be in the UP position and the An...

Страница 105: ...modems If that test is successful the problem may be the phone lines First make certain that you are set up for Synchronous operation by placing DIP Switch 12 in the UP position To initiate the Digit...

Страница 106: ...106 MultiModemBA User Guide...

Страница 107: ...Chapter 9 DIP Switch Settings...

Страница 108: ...side of the modem This chapter explains the modem s printed circuit board options Sixteen DIP Switch settings and the modem s speaker volume control are explained in detail including all default sett...

Страница 109: ...trol method Xon Xoff characters in the data dictate the start and stop of data flow from the computer or terminal Place DIP Switch 2 in the DOWN position to select Xon Xoff Flow Control Hardware Flow...

Страница 110: ...the UP position This establishes an RTS CTS condition state typical for an IBM5853 modem in half duplex mode Next place DIP Switch 4 in the DOWN position This spoofs the modem into operating like an...

Страница 111: ...ory Default Setting UP Switch 6 Maximum Throughput Setting Asynchronous Mode Leased Line Dial Up Some applications require you to dial into services with maximum throughput on and other applications w...

Страница 112: ...able Command mode The factory default setting is Command mode enabled Disable Command Mode Switch 8 UP Enable Command Mode Switch 8 DOWN Factory Default Setting DOWN Switch 9 Digital Loopback Test Asy...

Страница 113: ...ion Sync Asynchronous Synchronous Mode Leased Line Dial Up The modem can operate in either Asynchronous mode or Synchronous mode In Synchronous mode start and stop bits are eliminated The modem s inte...

Страница 114: ...and Switch 14 UP Switch 15 Carrier Detect DSR Forcing DSR Asynchronous Synchronous Mode Dial Up Leased Line Some terminals react in unusual ways to the toggling of the Carrier Detect CD RS 232C V 24 p...

Страница 115: ...Position Effect 1 Force DTR DTR from Interface UP DOWN 2 Flow Control E4 E5 UP Async Dial Up Leased Line DOWN 2 SDLC BSC Sync UP DOWN 3 Result Codes Enable Disable UP Async Dial up DOWN 3 DbM Transmit...

Страница 116: ...13 14 UP DOWN 14 4 K bps Operation 13 14 DOWN DOWN 9600 bps Operation 1432 Series SWITCH CONDITION EFFECT 13 14 UP UP 14 4 K bps Operation 13 14 DOWN UP 9600 bps Operation 13 14 UP DOWN 4800 bps Opera...

Страница 117: ...Chapter 10 Warranty Service and Tech Support...

Страница 118: ...EXPRESSED OR IMPLIED AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED This warranty does not apply to any products which have been damaged by l...

Страница 119: ...he status of your modem before calling tech support This status can include LED indicators screen messages diagnostic test results problems with a specific application etc Use the space below to note...

Страница 120: ...Select a file transfer protocol by typing the indicated letter such as Z for Zmodem the recommended protocol 6 If you select Zmodem the transfer will begin automatically If you select another protocol...

Страница 121: ...Hit ESC when finished 5 Highlight the Select File to Program option in the MAIN MENU Highlight the HEX file Hit ESC when finished 6 Highlight Program Firmware option in the MAIN MENU When you are pro...

Страница 122: ...0989 Phone 800 826 0279 Fax 914 267 2420 Email info thesupplynet com Internet http www thesupplynet com SupplyNet Online Ordering Instructions 1 Browse to http www thesupplynet com In the Browse by Ma...

Страница 123: ...Appendixes...

Страница 124: ...d into a power strip make sure the power strip is plugged in and its power switch is on Make sure the power supply module is firmly connected to the modem and to the wall outlet or power strip If the...

Страница 125: ...unications port Be sure to disable any unused ports To look for address or IRQ conflicts if you use Windows 3 1x select File Run in Program Manager type MSD and press ENTER Then select Mouse COM Ports...

Страница 126: ...replace X4 with X3 which will cause the modem to ignore dial tones If the modem reports BUSY the other number may be busy in which case you should try again later or it may indicate that you have fai...

Страница 127: ...inated on the other end of the line Try again If you were on line with a BBS it may have hung up on you because of lack of activity on your part or because you exceeded your time limit for the day Try...

Страница 128: ...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 may be experiencing line noise Enable error correction if it is disabled...

Страница 129: ...2 114 S DC3 13 19 3 33 51 S 53 83 s 73 115 T DC4 14 20 4 34 52 T 54 84 t 74 116 U NAK 15 21 5 35 53 U 55 85 u 75 117 V SYN 16 22 6 36 54 V 56 86 v 76 118 W ETB 17 23 7 37 55 W 57 87 w 77 119 X CAN 18...

Страница 130: ...t 1 Each pulse consists of an A mSec open and a B mSec closed where A will be either 60 or 67 mSec and B will be either 40 or 33 mSec for a total of 100 mSec per pulse or a rate of 10 pulses per secon...

Страница 131: ...eries A0 selects initial handshake at 33 600 to 31 200 to 28 800 to 24000 to 21 600 to 19 200 to 16 800 to 14 400 to 12 000 to 9600 to 4800 to 2400 to 1200 to 300 bps A1 selects initial handshake at 3...

Страница 132: ...n disconnect Ds s phone Dial a telephone number s where s may include up to 60 digits or T P R comma and characters DsNd s phone Store telephone number To store phone d 0 thru 9 number s is entered an...

Страница 133: ...s 11 bit mode En n 0 thru 5 E0 Modem Won t Escape E1 Method default setting E2 Break Method E3 Either or Break Method E4 No OK Response to E5 OK Response to Fn n 0 thru 2 F0 means no fallback when on...

Страница 134: ...dems negotiate V 42 Mode L1 means MNP on and LAP M off L2 means LAP M on and MNP off L3 means no detection phase but go directly to LAP M Mn n 0 thru 3 M0 means Monitor speaker always Off M1 means Mon...

Страница 135: ...s following the P Pn n 0 or 1 P0 means 60 40 pulse ratio P1 means 67 33 pulse ratio Qn n 0 1 or 2 Q0 means Result Codes sent Q1 means Result Codes will be suppressed quiet Q2 means Dumb Answer Mode Qn...

Страница 136: ...ts 19 200 bps at serial port SB38400 selects 38 400 bps at serial port SB57600 selects 57600 bps at serial port 932 Series SB300 selects 300 bps at serial port SB1200 selects 1200 bps at serial port S...

Страница 137: ...meters Xn 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 X...

Страница 138: ...ion Callback password xxxxxx must start with a non numeric character and upper lower case sensitive Callback password xxxxxx must be a minimum of 6 and maximum of 10 characters yy memory locations are...

Страница 139: ...mand mode without leaving AT command mode V5 DSR follows DTR in V 25bis mode V6 DSR does not follow DTR in V 25bis mode CSPs Changes the serial bps rate CSP0300 300 bps CSP1200 1200 bps CSP2400 2400 b...

Страница 140: ...sion leased line Down 0 dB Transmission leased line 4 UP UUCP Spoofing Off Down UUCP Spoofing On 5 UP Automatic Answer On Down Automatic Answer Off 6 UP Max throughput On Down Max throughput Off 7 UP...

Страница 141: ...n AS 400 Mode On 5 UP Answer Mode On Down Originate Mode On 6 UP Slave Clocking Off Down Slave Clocking On 7 UP RTS Dependent on interface Down RTS forced on at all times 8 UP Command Mode Off Down Co...

Страница 142: ...14 DOWN DOWN 9600 bps Operation 1432 Series SWITCH CONDITION EFFECT 13 14 UP UP 14 4 K bps Operation 13 14 DOWN UP 9600 bps Operation 13 14 UP DOWN 4800 bps Operation 13 14 DOWN DOWN 2400 bps Operatio...

Страница 143: ...by a comma 4 255 4 character in a dial command S9 100 mSec 1 255 6 Sets carrier detect response time S10 100 mSec 1 255 7 Sets delay time between when carrier is lost and when modem disconnects S11 1...

Страница 144: ...n line escape sequence before buffer is cleared and escape sequence aborted S36 1 second 0 255 0 S36 sets the time between DTR inactive and the modem going off hook busy out S37 1 second 0 255 5 S37 s...

Страница 145: ...bps and gone on line 11 CONNECT 4800 Modem has detected carrier at 4800 bps and gone on line 12 CONNECT 9600 Modem has detected carrier at 9600 bps and gone on line 13 CONNECT 14400 Modem has detected...

Страница 146: ...able mode the following responses change 1L CONNECT LAPM 5L CONNECT 1200 LAPM 9L CONNECT 2400 LAPM 10L CONNECT 4800 LAPM 12L CONNECT 9600 LAPM 13L CONNECT 14400 LAPM 19L CONNECT 19200 LAPM 21L CONNECT...

Страница 147: ...llowed and a CFIFF indication is given The modem in AT command mode will respond with NO CARRIER If country regulations require that the Forbidden Numbers list be checked in AT mode then NO CARRIER wi...

Страница 148: ...nswers immediately upon receiving the first ring There is no disconnect message NO CARRIER if a normal connection is made V 25bis Set Up and Initialization Before you operate your modem in the V 25bis...

Страница 149: ...Result Codes When in V 25bis mode the AT V1 command executed your modem provides you with several responses which can help you follow the progress of V 25bis operations These are similar to the Resul...

Страница 150: ...command mode without leaving AT command mode the V 25bis command follows V2 on the command line Change Serial Baud Rate CSP Command The CSP command will change the serial baud rate of your modem by e...

Страница 151: ...if the memory is full To list the numbers in the Forbidden list enter RLF and hit RETURN Disregard or Connect to Incoming Calls DIC or CIC Command The Disregard or Connect to Incoming Calls commands a...

Страница 152: ...times out then no connection is possible 2 Switzerland a Command Indication modification 1 Modem must remain on hook for 5 seconds after disconnect 2 Modem must remain on hook for 5 minutes after 4 c...

Страница 153: ...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 list 4 Delayed and Forbidden Numbers...

Страница 154: ...ial 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 Cable IBM PC RJ 11 Type Modular...

Страница 155: ...x J RS 232C Interface Specifications 25 POS MALE DSUB 8 POS MINI DIN TD 2 RCV 3 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 2...

Страница 156: ...the EIA RS 232C standard itself The following chart lists the EIA RS 232C interface pins and circuits present on the modem s RS232C Interface connector All other pins are unused Pin Designation eia C...

Страница 157: ...the modem that the computer or terminal has data that it wants to transmit Clear To Send Pin 5 CTS CB Direction from modem The CTS line indicates to the terminal that the modem will transmit any data...

Страница 158: ...ates the center of each signal element on the Received Data circuit Data Terminal Ready Pin 20 TR or DTR CD Direction to modem This signal TR or DTR provides a means for the terminal or computer to co...

Страница 159: ...to modem The Terminal Busy OOS circuit is not defined in the RS 232C standard but is used by us and most manufacturers to make the phone lines busy to incoming phone calls Pin 25 is not normally conn...

Страница 160: ...different countries the approval does not of itself give an unconditional assurance of successful operation on every PSTN network termination point In the event of problems you should contact your equ...

Страница 161: ...any will notify the customer as soon as possible Also you will be advised of your right to file a complaint with the FCC if you believe it is necessary 5 The telephone company may make changes in its...

Страница 162: ...f the power utility telephone lines and internal metallic water pipe system if present are connected together This precaution may be particularly important in rural areas Caution Users should not atte...

Страница 163: ...trol C 61 Carrier Detect Response Time 80 Carrier Detect DSR Forcing 114 Carrier Frequencies 14 Carrier Loss Disconnect Delay Time 80 Change LOGIN Password I 93 Change Serial Baud Rate CSP Command 150...

Страница 164: ...e 121 File transfer protocols 32 Flash On Hook 51 FlashPro to Upgrade Modem Firmware 121 Flow Control 109 Flow control 31 128 Flow Control E4 E5 109 Force Answer Mode A 75 Forced DTR 109 Frequency Sta...

Страница 165: ...ion Character 95 Remote Configuration Escape Character 80 Remote Configuration Procedures 92 Remote System Configuration 31 Request To Send 157 Request To Send Forced 112 Result Code Summary 145 Resul...

Страница 166: ...ng the MT2834BL 121 V V 25bis Mode AT Commands 149 V 25bis AT Commands 150 V 25bis Operation 147 V 25bis Responses Result Codes 149 V 25bis Set Up and Initialization 148 V 42 32 V 42 Mode Select L 64...

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