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31

I am having trouble
getting my init string
to work.

My 2400bps (or other
modem) worked
with my system but
the Boca modem
does not.

I need the modem to
connect at a certain
speed.

 • Init strings are primarily personal

preferences. Use the most basic
one that can get the job done. See
Installation Hints, page 8.

• Review earlier suggestions.

• Send an AT&Q6N0S37=n where

n= 9 for 9600, 6 for 2400, 5 for
1200, 1 for 300bps.

SYMPTOM

POSSIBLE REMEDY

Troubleshooting

Summary of Contents for Bocamodem M144EW

Page 1: ...1...

Page 2: ...2 14 4Kbps BOCAMODEM...

Page 3: ...IT you should check your DOS manual or seek assistance from you local computer dealer to install the product How to get Technical Assistance The dealer that you purchased this product or your computer...

Page 4: ...surance programs to ensure the product you purchased is of the highest caliber Sometimes however a component may be missing from the box or is damaged or corrupt in some way If this happens immediatel...

Page 5: ...manual Connecting the Modem You can connect the modem to various types of telephone jacks The acceptable phone jack types are RJ 11 RJ 12 RJ 13 RJ 41S and RJ 45S Most homes and businesses use one of t...

Page 6: ...JACK AC ADAPTER RS 232 ADAPTER CABLE TO SERIAL PORT 9 or 25 pin connector REAR OF SYSTEM PHONE OPTIONAL MODEM After you have installed your modem and made the necessary connections verify line connect...

Page 7: ...nections as shown below SET JUMPERS AND INSTALL CARD IN 8 OR 16 BIT SLOT MODEM After you have installed your modem and made the necessary connections verify line connection by lifting the receiver of...

Page 8: ...nternal 21 3 1 The Contents of Your Package 21 3 2 Communication Settings 22 3 3 Installing the Modem 24 3 4 Connecting the Phone Line 25 Section Four Troubleshooting 28 Appendix A Command and Protoco...

Page 9: ...h the Hayes AT command set Programmable speaker volume control Auto speed sensing V 32bis V 42bis and MNP5 are supported as well as V 42 and MNP 2 4 error correction offering throughput speed of 57 60...

Page 10: ...you want to custom configure your stored profiles we suggest that you always start out with an AT F C1 D2 R1 before customizing other commands This string will reset the modem to the factory defaults...

Page 11: ...4 4Kbps Modem board or external unit physical installation instructions including how to connect the phone line and procedures for testing the connection Section Four Troubleshooting This provides a d...

Page 12: ...esearch 14 4Kbps Modem to your computer 2 1 The Contents of Your Package Verify that your modem package contains the following items 123 123 123 RJ 11 CABLE AC POWER ADAPTER EXTERNAL 14 4Kbps MODEM RS...

Page 13: ...nterface Operating the 14 4Kbps Modem with a computer requires communication software either as a stand alone product as included here or as part of an application program The 14 4Kbps Modem takes a D...

Page 14: ...e 14 4Kbps Modem and explains how to make the proper connections from the 14 4Kbps Modem to your telephone line Before you connect the telephone line to the 14 4Kbps Modem you should familiarize yours...

Page 15: ...s as shown above 3 Check to make sure that the power switch is OFF DOWN Then plug the small end of the power adapter into the power jack on the back of the modem and plug the power adapter into a stan...

Page 16: ...Plug the end of the phone cord that came with the modem into the wall jack and the other end into the RJ 11 jack at the rear of the modem marked LINE AC adapter Power jack Power switch Power connecto...

Page 17: ...ack at the rear of the modem labeled PHONE 5 Lastly connect the modem to the computer s serial port with the serial cable The modem is now ready to be tested and operated Turn your computer on now the...

Page 18: ...ding on the software you choose refer to the appropriate manual for start up and configuration 2 6 Testing the Modem To verify that your modem is working properly follow these steps After making sure...

Page 19: ...when the 14 4Kbps Modem takes control of the telephone line to establish a data link SD Send Data FLASHES when a data bit is sent to the 14 4Kbps Modem by the computer RD Received FLASHES when a data...

Page 20: ...tional information 3 Type in the command ATZ followed by ENTER and the 14 4Kbps Modem will respond with OK If the 14 4Kbps Modem does not respond with OK refer to the Troubleshooting section of this m...

Page 21: ...in your computer 3 1 The Contents of Your Package Verify that your modem package contains the following items If any items are missing or damaged contact the vendor from whom you purchased the modem...

Page 22: ...t this non standard interrupt as well 1 Run COMCHECK to determine how many serial ports are already installed in your system Insert any diskette into your floppy drive and type A COMCHECK or B COMCHEC...

Page 23: ...conflicts with other devices already in your system Insert any diskette into your floppy drive and type A COMCHECK or B COMCHECK 1 2 3 4 3 4 5 7 COM IRQ WINDOWS 3 1 USERS When an internal modem uses...

Page 24: ...ocate an available 8 or 16 bit expansion slot Remove that expansion slot cover and save the screw 3 Carefully insert the modem into the expansion slot applying pressure to the upper metal edge until i...

Page 25: ...from the modem to your telephone line Before you connect the telephone line to the modem you should familiarize yourself if you haven t done so already with the information provided in the Appendix o...

Page 26: ...to the telephone wall jack unplug the phone cable Then plug the other end of the modem cable into the telephone wall jack 3 To continue using the phone connect the phone cable into the PHONE jack on...

Page 27: ...Command or File Name message 4 Start your communications software and enter terminal mode Type in ATZ followed by ENTER and the modem will respond with OK after a few seconds If the modem does not res...

Page 28: ...ack and check for a dial tone If no dial tone is heard the telephone line is not working Contact the telephone company Check the connections between the modem and the computer and the modem and the te...

Page 29: ...m Make sure the echo command is set to ON Change to echo with the ATE command Make sure the local yours and remote modem configurations are compatible Turn off your modem EXTERNAL exit and re run your...

Page 30: ...e answering before the modem can Turn the answering machine off or use the software to set auto answer to respond in fewer rings than the answering machine Check for any loose connections Re try the c...

Page 31: ...es not I need the modem to connect at a certain speed Init strings are primarily personal preferences Use the most basic one that can get the job done See Installation Hints page 8 Review earlier sugg...

Page 32: ...to run with error correction and data compression turned OFF The easiest way to accomplish this is by using the command AT Q6 and setting the communication software to the correct baud rate for the se...

Page 33: ...ration or require special settings See pages 51 71 for additional details Hayes compatible commands consist of a basic command set and an extended command set The basic set involves functions such as...

Page 34: ...and for MNP the percent character extended AT command for V 42 V 42bis Examples AT V tells the modem to display view its current configuration and user profile AT J1 tells the computer to adjust its s...

Page 35: ...r full duplex error free communications This protocol detects and corrects errors which can result from telephone line noise and other signal distortions There are several classes of MNP operation als...

Page 36: ...a 75bps back channel This is mostly used in Europe and South America V 24 CCITT serial interface standard EIA RS232 D V 32 CCITT standard for 9600bps and 4800bps communications V 32bis CCITT standard...

Page 37: ...or their use and should not be undertaken lightly Local Analog Loopback Test This test verifies the path between the local modem and the PC 1 Set the DTE speed from 1200 to 14 400 bits per second If t...

Page 38: ...d If the speed is less than 1200 or greater than 14 400 the test WILL NOT operate and a result code of ERROR will be generated if any of the tests are attempted 2 Make sure the modem is in command mod...

Page 39: ...problems bring the baud rate down to 9600 or 2400 If the line quality is too poor use a line simulator to run this test 2 Issue an AT Q0 command to the local modem This sets the modem to the direct mo...

Page 40: ...age and it will echo on the screen Remote Digital Loopback Test with Self test 1 Set the DTE speed from 1200 to 14 400 bits per second If the speed is less than 1200 or greater than 14 400 the test WI...

Page 41: ...rovides for a 10 second test 7 Issue a dial command to the local modem to instruct it to call the remote modem Wait until the two modems have established a connection 8 Type the escape sequence to rev...

Page 42: ...ulation Protocols V 29 9600 7200bps transmit and receive V 27 ter 4800 2400bps transmit and receive V 21 channel 2 300bps transmit and receive V 42 MNP2 4 and V 42bis MNP5 support LED Status Indicator...

Page 43: ...mmunications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be...

Page 44: ...act the vendor from whom you purchased the MODEM Telephone Connection Requirements Except for telephone company provided ringers all connections to the telephone network shall be made through standard...

Page 45: ...tly into a modular jack DOC Compliance Statement Canada The Canadian Department of Communications label identifies certified equipment This certification means that the equipment meets certain telecom...

Page 46: ...tem if present are connected together This precaution may be particularly important in rural areas CAUTION Users should not attempt to make such connections themselves but should contact the appropria...

Page 47: ...only Replaced parts and or products become the property of BRI If the returned product is sent by mail the purchaser agrees to prepay shipping charges insure the product or assume the risk of loss or...

Page 48: ...ally during off hours if you have a question about product settings or if you wish to download special software or utilities If the Troubleshooting section section Four did not resolve your problem yo...

Page 49: ...e package Boca Research Inc will return any product which is not accompanied by an RMA number 3 Refer to the Warranty Statement if the product is covered under the five year Boca Research Inc Limited...

Page 50: ...o the original packaging and insure the package to protect against loss or damage during transit Shipping charges must be prepaid C O D shipments will not be accepted Please use the address below for...

Page 51: ...al on Dial Modifiers Dial Options Description ATD none Dial ATD followed by phone number ATDL none Re dial ATDP none Pulse rotary dial 10 pulses per second ATDT none Touch tone dial DTMF ATDW 1 255sec...

Page 52: ...ays ROM checksum as OK or ERROR ATI3 Displays the firmware revision level Speaker volume ATL0 Off or low volume ATL1 Low volume default ATL2 Medium volume ATL3 High volume Speaker control ATM0 Disable...

Page 53: ...rmat ATV0 Numeric format ATV1 Verbal format default Error correction message control ATW0 Error correction call progress not reported default ATW1 Call progress reported ATW2 Call progress not reporte...

Page 54: ...O CARRIER ERROR NO DIALTONE NO ANSWER and CONNECT XXXX ATX4 Enables monitoring of busy tones and sends all messages default Control long space disconnect ATY0 Disables long space disconnect default AT...

Page 55: ...hangs up auto answer inhibited AT D1 Q0 1 4 6 Asynchronous escape sequence Q2 3 Modem hangs up auto answer inhibited AT D2 Q0 6 Modem hangs up auto answer inhibited default AT D3 Q0 1 4 6 Modem does...

Page 56: ...ption Select pulse dial make break ratio AT P0 Selects a make break ratio of 39 61 at 10pps US and Canada default AT P1 Selects a make break ratio of 33 67 at 10pps UK and Hong Kong AT P2 Same as 0 ex...

Page 57: ...pback test AT T7 Executes the remote digital loopback test with a self test AT T8 Executes the remote analog loopback test with a self test AT V View current configuration and user profile Store user...

Page 58: ...cters DEFAULT AT A2 set maximum block size to 192 characters AT A3 set maximum block size to 256 characters Transmit Break When this command is entered during a non MNP connection a break signal is se...

Page 59: ...buffers but sends a break to the remote modem AT K5 modem sends a break to the remote modem in sequence with any transmitted data DEFAULT 2 When a break is received from the remote modem during NORMA...

Page 60: ...ffering mode AT N1 DIRECT pass through mode AT N2 RELIABLE LINK mode Specifies error correction for the modem to modem connection AT N3 AUTO RELIABLE LINK mode Attempts error correction connection but...

Page 61: ...LT Auto retrain Determines whether or not the modem automatically monitors the line quality and requests a retrain when necessary AT E0 disables line quality monitor auto retrain DEFAULT AT E1 enables...

Page 62: ...subtracted from signal level in dBm Report Line Signal Quality Returns a high order byte of the calculated EQM eye quality monitor This can range from 0 to 255 When the value is 8 or greater the mode...

Page 63: ...g a Register Value To read the current value of a register type AT Sn ENTER where n is a register number AT Sn Sn ENTER from the command mode To read the register values of S0 and S1 type AT S0 S1 ENT...

Page 64: ...aling S7 1 255 seconds 50 Wait for carrier after dial S8 0 255 seconds 2 Pause time for dial delay S9 1 255 seconds 6 10 Carrier detect S10 1 255 seconds 14 1 4 Lost Carrier to Hang Up Delay S11 Reser...

Page 65: ...ns S37 0 21 0 Modem to Modem speed NOTE This is interlinked with the ATFn command If an invalid number is entered the number is accepted into the register but S37 will react as though the default valu...

Page 66: ...error correction with no compression 138 enables error correction WITH compression S48 0 7 128 7 V 42 Negotiation NOTE 0 disables negotiation and proceeds with LAPM 7 enables negotiation and 128 disa...

Page 67: ...s follows for S95 0 CONNECT CODE indicates DCE speed instead of DTE speed 1 Append ARQ automatic repeat request to verbose CONNECT XXXX result code if protocol is other than none 2 Enable CARRIER XXXX...

Page 68: ...in the command line CONNECT 5 Modem established a connection 1200 at 1200 1200bps NO 6 Modem did not detect a dial tone within 5 DIALTONE seconds after going off hook BUSY 7 Modem detected a busy sign...

Page 69: ...at 38400 bps 38400 CONNECT 18 Connection made at 57600 bps 57600 CONNECT 19 Connection made at 115 200 bps 115200 CONNECT 22 Modem returns this result code when upon 75TX 1200RX establishing a V 23 or...

Page 70: ...en detected 75 1200 CARRIER 46 Carrier rate of 1200 bps 1200 CARRIER 47 Carrier rate of 2400 bps 2400 CARRIER 48 Carrier rate of 4800 bps 4800 CARRIER 49 Carrier rate of 7200 bps 7200 CARRIER 50 Carri...

Page 71: ...been enabled COMPRESSION 67 The modem has connected in V 42bis V 42bis and COMPRESSION message reporting has been enabled COMPRESSION 69 The modem has connected without NONE data compression and COMP...

Page 72: ...tional Standards Institute A non profit private industry association which governs most USA standards setting agencies ASCII Acronym for American Standard Code for Information Interchange ASCII is an...

Page 73: ...eceived from either the DTE Data Terminal Equipment or computer terminal or the remote modem This is controlled by the MNP based AT extended command K A break signal is represented on the communicatio...

Page 74: ...data data compression A technique that examines transmitted data for redundancy and replaces strings groups of characters with special codes which the receiving modem interprets and restores to its o...

Page 75: ...he basic AT command set F fax mode The modem is in fax mode when through use of fax communications software it can send and receive faxes print and display fax files convert files to fax files and set...

Page 76: ...command L LAPM Link Access Protocol Modem A V 42 ARQ type of error correction protocol which is controlled by S Register 46 where LAPM may be activated with or without V 42bis data compression leased...

Page 77: ...ications protocols developed by Microcom for full duplex error free communications make break ratio The P command controls the ratio of the off hook make to on hook break interval used by the modem wh...

Page 78: ...d with ATT All telephone exchanges will accept older style pulse dialing and most exchanges will accept modern tone dialing Tone dialing is faster and more reliable since mechanical relays and their i...

Page 79: ...and specifies the clocking source referred to as the transmit signal element timing This can be controlled by either the modem or the terminal synchronous communications A method of transmission in wh...

Page 80: ...nts of Your Package internal 21 Control Long Space Disconnect 54 D Data Carrier Detect 55 Data Communication Protocols 35 Data Terminal Ready 55 Data transmission rates 9 DB 25 25 pin male connector 1...

Page 81: ...atio 56 Microcom Networking Protocol 35 MNP 35 58 60 Mode Responses 53 Modem Data Rate 42 Modem Modulation Protocols 42 N Non standard IRQs 23 O On Line State 53 Operational Requirements external 13 P...

Page 82: ...any Requirements 44 Test and Diagnostics 57 Testing the Connection internal 27 Testing the Connection external 20 Touch Tone DTMF dialing 51 Transmit Carrier Signal 51 Troubleshooting 28 32 TSR termin...

Page 83: ...83...

Page 84: ...84 14 4Kbps BOCAMODEM Manual Part No 9431 Rev 2 1...

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