FAX/DATA MODEM USER'S MANUAL
Contents
1. K1 3 5 Modem sends a BREAK to the remote modem Nn Operation Mode Control Selects the operating mode to be used during connection NO Normal mode speed control without error correction N1 Plain mode no speed control and no error correction N2 Reliable mode N3 Auto reliable mode default N4 LAPM error correction only N5 MNP error correction only 1 2 c Commands Preceded by C Enable Disable Data Compression Enables or disable data compression negotiation The modem can only perform data compression on an error corrected link The parameter value if valid is written to S41 bits 0 and 1 CO Disable data compression C1 Enable MNP 5 compression C2 Enable V 42 bis compression C3 Enable both V 42 bis and MNP 5 default Result Codes OK n 0 1 2 or 3 ERROR otherwise En Enable Disable Line Quality Monitor and Auto Retrain or Fallback Fall Forward Control whether or not the modem will automatically monitor the line quality and request a retrain E1 or fall back when quality is insufficient or fall forward when line quality is sufficient E2 Applies to dial up line only The parameter value valid is written to S41 bits 2 and 6 If enable the modem attempts to retrain for a maximum of 30 seconds EO Disable auto retrain E1 Enable auto retrain E2 Enable auto retrain and fallback default E3 Enable auto retrain and fast hang up Q Line Signal Quality Reports the line signal q2. 000 00 NUL 032 20 space 064 40 096 60 001 01 SOH 033 21 065 41 A 097 61 a 002 02 STX 034 22 066 42 B 098 62 b 003 03 ETX 035 23 067 43 C 099 63 c 004 04 EOT 036 24 068 44 D 100 64 d 005 05 ENQ 037 25 069 45 E 101 65 e 006 06 ACK 038 26 amp 070 46 F 102 66 f 007 07 BEL 039 27 071 47 G 103 67 g 008 08 BS 040 28 072 48 H 104 68 h 009 09 HT 041 29 073 49 105 69 i 010 OA LF 042 2A 074 4A J 106 6A j 011 0B VT 043 2B 075 4B K 107 6B k 012 0C FF 044 2C 076 4C L 108 6C 013 0D CR 045 2D 077 4D M 109 6D m 014 0E SO 046 2E 078 4E N 110 6E n 015 OF SI 047 2F 079 Fo 111 6F o 016 10 DLE 048 30 0 080 50 P 112 70 p 017 11 DC1 049 31 1 081 5 Q 113 71 q 018 12 DC2 050 32 2 082 52 R 114 72 r 019 13 DC3 051 33 3 083 53 S 115 73 s 020 14 DC4 052 34 4 084 54 T 116 74 t 021 15 NAK 053 35 5 085 55 U 117 75 u 022 16 SYN 054 36 6 086 56 V 1148 76 v 023 17 ETB 055 37 7 087 57 W 119 77 w 024 18 CAN 056 38 8 088 58 X 120 78 x 025 19 EM 057 39 9 089 59 Y 1x 79 y 026 1A SUB 058 3A 090 5A Z 122 7A z 027 1B ESC 059 3B 091 5B 123 7B 028 1C FS 060 AC lt 092 5C 124 7C 029 1D GS 061 3D 093 5D 125 7D 030 1E RS 062 3E gt 094 5E 126 7E 031 1F US 063 3F 095 5F 127 7F DEL
3. Connection at 4800 bps Connection at 9600 bps Connection at 7200 bps Connection at 12000 bps Connection at 14400 bps Connection at 19200 bps Connection at 38400 bps Connection at 57600 bps Connection at 115200 bps Connection at 2880 bps Connection at 300 bps Connection at transmit 1200 receive 75 bps Connection at transmit 75 receive 1200 bps Connection at 110 bps Ring Back signal detected Error occurred in Class 1 fax operation Fax modem connection established Data modem connection established CARRIER 300 40 Carrier rate of 300 bps CARRIER 1200 75 44 Carrier rate of transmit 1200 receive 75 bps CARRIER 75 1200 45 Carrier rate of transmit 75 receive 1200 bps CARRIER 1200 46 Carrier rate of 1200 bps CARRIER 2400 47 Carrier rate of 2400 bps CARRIER 4800 48 Carrier rate of 4800 bps CARRIER 7200 49 Carrier rate of 7200 bps CARRIER 9600 50 Carrier rate of 9600 bps CARRIER 12000 51 Carrier rate of 12000 bps CARRIER 14400 52 Carrier rate of 14400 bps CARRIER 16800 53 Carrier rate of 16800 bps CARRIER 19200 54 Carrier rate of 19200 bps CARRIER 21600 55 Carrier rate of 21600 bps CARRIER 24000 56 Carrier rate of 24000 bps CARRIER 26400 57 Carrier rate of 26400 bps CARRIER 28800 58 Carrier rate of 28800 bps CONNECT 16800 59 Connection at 16800 bps CONNECT 21600 61 Connection at 21600 bps CONNECT 24000 62 Connection at 24000 bps CONNECT 26400 63 Connection at 26400 bps COMPRESSION 66 MNP Class 5 data compressi
4. Example of Unformatted From Reporting RING 0412303332323234303539313435353132333435 RING RING Features Data Rates bps 56000 54667 53333 52000 50667 49333 48000 46667 45333 42667 41333 40000 38667 37333 36000 34667 33333 32000 30667 29333 28000 bps ITU T V 90 receive only 56000 54000 52000 50000 48000 46000 44000 42000 40000 38000 36000 34000 32000 bps K56Flex receive only 33600 31200 28800 26400 24000 21600 19200 16800 14400 12000 9600 7200 4800 2400 1200 300bps Compatibility Data ITU V 90 ITU T V 34 V 32 bis V 32 V 22 bis V 23 V 22 and V 21 Bell 212A and 103 Rockwell V Fast Class K56flex Fax ITU T V 17 V 29 V 27 ter and V 21 ch 2 Command Set Enhanced AT command set Fax Class 1 command Flow Control Xon Xoff Hardware RTS CTS Data Compression V 42bis MNP5 Error Correction V 42 MNP 2 4 General Features Auto Fallback AT Commands Auto Selection of COM Port and IRA settings Automatic Answering Signal Quality Monitoring and Auto Retrain Single Crystal Design Data Fax Voice Auto Detection Automode High throughput Virtual UART DTE rate up to 115200 ISA Bus Interface Low Power Consumption Opearting System Compatibility Windows 95 Windows 98 Windows NT 4 0 Operation Full or Half duplex 56000bps with 54667 54000 53333 52000 50000 50667 49333 48000 46667 46000 45333 44000 42667 42000 41333 40000 38667 38000 373
5. asynchronous synchronous ITU T V 23 1200 75 bps asynchronous synchronous ITU T V 22 1200 bps asynchronous synchronous ITU T V 21 300 bps asynchronous Bell 212A 1200 bps asynchronous synchronous Bell 103 300 bps asynchronous Fax ITU T V 17 14400 9600 bps half duplex ITU T V 29 9600 7200 bps half duplex ITU T V 27 ter 4800 2400 bps half duplex ITU T V 26 bis 2400 1200 half duplex ITU T V 26 A 2400 half duplex G Ill Group 3 fax Compliance FCC 15868 Command Buffer 40 characters Extra Memory 4 x 36 digits Transmit Level 11 1 dBm Receive Sensitivity 40dBm B QUICK REFERENCE A Bn Cn D En Hn Go On line in Answer Mode Select Protocol to 300 bps or 1200 bps Carrier Transmit Control Go On line in Originate Mode Command Echo Hang Up Identification Yn Zn amp Cn amp Dn amp Fn amp Gn amp Kn amp Sn amp Vn amp Wn amp Yn amp Zn An Bn Gn Kn Nn Cn Monitor Speaker On Off Automode Enable Return to On line Data Mode Result Code Display Reading and Writing to S Registers Set Tone Dial as Default Select Word or Digit Result Codes Negotiation Progress Reporting Extended Result Codes Enables or Disables Long Space Disconnect Reset Select DCD Options DTR Option Fetch Factory Configuration Set Guard Tone DTE Modem Flow Control DSR Option View Configuration Profiles Store the Current Configuration to Nonvo
6. 1 Set Guard Tone amp GO Disable guard tone default amp G1 Enable 550Hz guard tone amp G2 Enable 1800Hz guard tone on answering modem DTE Modem Flow Control Determines how the modem controls the flow of data between the local DTE and the modem When the modem terminal buffer is nearly full the modem will either send an XOFF or drop CTS to stop the data flow When the buffer is nearly empty the modem will either send an XON or raise CTS to start the data flow amp Sn amp KO Disable DTE DCE flow control amp K3 Enable RTS CTS DTE DCE flow control Default for data modem amp K4 Enables XON XOFF DTE DCE flow control amp K5 Enables transparent XON XOFF DTE DCE flow control amp K6 Enable RTS CTS and XON XOFF DTE DCE flow control DSR Option Determines whether DSR operates in accordance with the EIA 232 D specification or remains ON amp Vn amp Wn amp S0 Force DSR on default amp S1 DSR on at the start of handshaking and off after carrier loss View Configuration Profiles amp VO Display active profile amp V1 Display stored profiles amp V2 Display stored telephone numbers Store the Current Configuration to Nonvolatile RAM amp WO Writes the current active configuration to profile 0 in nonvolatile RAM amp W1 Writes the current active configuration to profile 1 in nonvolatile RAM amp Yn Select the Default Profile amp Y0 amp Y Uses profile 0 on power up default amp Y1
7. Description SO 0 255 rings 0 00h Number of rings before auto answer S1 0 255 rings 0 00h Ring count S2 0 127 ASCII 43 2Bh Escape character code s3 0 127 ASCII 13 ODh Command terminator lt CR gt character S4 0 127 ASCII 10 OAh Line feed character S5 0 127 ASCII 8 08h Backspace character S6 2 255 seconds 2 02h Wait time for blind dialing Default S7 1 255 seconds 50 32h Wait time for carrier after dial S8 0 255 seconds 2 02h Pause time for comma dial delay s9 1 255 1 10 sec 6 06h Carrier detect response time 10 1 255 1 10 sec 14 OEh Lost carrier to hang up delay S11 50 255 1 1000 sec 95 5Fh DTMF Tone Duration 12 0 255 1 50 sec 50 32h Escape code timing 13 Reserved 14 Reserved 15 Reserved S16 Reserved S17 Reserved S18 0 255 seconds 0 00h Test mode timer 19 Reserved 20 Reserved 21 Reserved 22 Reserved 23 Reserved 24 Reserved 25 0 255 seconds 5 05h Dalay to DTR S26 Reserved S27 Reserved S28 Reserved S30 0 255 10s 0 00h Disconnect Inactivity Timer 32 0 255 ASCII 17 11h XON Character 33 0 255 ASCII 19 13h XOFF Character 34 0 13 ia ODh V 34 Data Rate bit rate Default 35 0 5 0 00h V 34 Symbol RAte baud rate S36 Reserved S37 0 Desired DCE Speed 38 0 255 seconds 20 Delay before forced disconnect Default 39 Reserved S40 Reserved S41 Reserved 42 Reserved 43 Reserved S44 Reserved 45 Reserved S46 Reserved S47 Reserved 48 Reserved 82 Reserve
8. Uses profile 1 on power up amp Zn Store Telephone Numbers n 0to9 amp Zn Store one of four dial strings including a telephone number of up to 36 digits in nonvolatile RAM For example to store the telephone number 002852117 to RAM location 1 issue the following command Command AT amp Z1 002852117 lt CR gt 1 2 5 Commands Proceded by An Select Maximum MNP Block Size The modem will operate an MNP error corrected link using a maximum block size controlled by the parameter supplied The parameter value if valid is written to S40 bits 6 and 7 AO 64 character max MNP block size A1 128 character max MNP Block size default A2 192 character max MNP block size A3 256 character max MNP block size Result Codes OK n 0 to 3 ERROR Otherwise Bn Transmit Break to Remote In non error correction mode the modem will transmit a break signal to the remote modem with a length in multiples of 100ms according to parameter specified If a number in excess of 9 is entered 9 is used The command works in conjunction with the K command In error correction mode the modem will signal a break through the active error correction protocol giving no indication of the length B1 B9 Break length in 100ms units Default 3 Non error corrected mode only Result Codes OK If connected in data modem mode NO CARRIER If not connected or connected in fax modem mode Note When the modem receives a break from the remo
9. instructs the modem to go off hook immediately and then make a handshake with the remote modem Handshaking is not available during leased line operation A is usually used to manually answer an incoming call or to switch from voice conversation to data communication Bn Select Protocol to 300 bps or 1200 bps B0 B Selects ITU T 300 or ITU T 1200 protocol once the command line prefix AT has been entered at the 300 bps or 1200 bps data rate B1 Selects BELL 300 or BELL 212A protocol once the command line prefix AT has been entered at the 300 or 1200 bps data rate default B2 Selects ITU T V23 originate mode will transmit data at 75 bps and receive data at 1200 bps Answer mode will transmit data at 1200 bps and receive data at 75 bps The command NO Disable auto mode must be selected Cn Carrier Transmit Control Controls the transmit carrier The modem is preset to turn carrier on and off as necessary the C1 option The signal is on when the modem is calling or connected to a remote modem and is off when it is not The CO option is NOT valid co Not permitted returns ERROR result code C1 Normal transmit carrier switching preset D Go On line in Originate Mode D instructs the modem to go off hook immediately and automatically dial the number contained in the dial string following D The dial string may contain any of the dial modifiers contained in the following section The D command without a dial string is usually used to s
10. no effect on pulse dialing Range 50 255 milliseconds Default 95 12 Escape Guard Time S12 determines the escape guard time The escape guard time is the minimum waiting time required before and after entering the escape code three consecutive escape characters in the on line state It is also the maximum waiting time allowed between any two consecutive escape characters If the waiting time before or after the escape code is shorter than the guard time or if the waiting time between consecutive escape characters is longer than the guard time then the modem does not recognize the escape command and stays on line If the escape guard time is set at 0 second it is impossible to return the modem to command state Range 0 255 1 50 of a second Default 50 1 second 13 Reserved S14 Reserved S15 Reserved S16 Reserved S17 Reserved S18 Test Timer The test timer determines how long tests are performed The modem automatically ends the test when the test time is expired The default value of 000 disables the test timer When the timer is thus disabled all tests must be ended with the amp TO command Range 0 255 seconds Default 0 S19 Reserved S20 Reserved 21 Reserved 22 Reserved 23 Reserved 24 Reserved 25 Delay to DTR S25 serves two purposes When the modem is operating in synchronous mode 1 the value assigned to S25 specifies the length of time the modem waits after a connection has b
11. the default time is one second and then enter three consecutive escape characters the default character is After one more escape guard time one second the modem returns to the command state and sends the OK result code to the screen Note that the escape command is the only command that can be recognized by the modem in the on line state it cannot be recognized in the command state 1 5 Result Codes The modem sends a response to the user via the screen after a command is issued As shown in the figure below there are two forms for each result code Long Form OK CONNECT RING NO CARRIER ERROR CONNECT 1200 NO DIALTONE BUSY NO ANSWER CONNECT 600 CONNECT 2400 CONNECT 4800 CONNECT 9600 CONNECT 7200 CONNECT 12000 CONNECT 14400 CONNECT 19200 CONNECT 38400 CONNECT 57600 CONNECT 115200 CONNECT 2880 CONNECT 300 CONNECT 1200TX 75RX CONNECT 75TX 1200RX CONNECT 110 RING BACK FCERROR FAX DATA Short Form ANOnRWNH O Description Modem successfully executed an AT command A connection established Modem detected an incoming call Modem lost or could not detect a remote carrier signal within the register S7 time Modem detected an error in an AT command Connection at 1200 bps Modem did not detect a dial tone within 5 seconds after off hook Modem detected a busy tone Modem did not detect 5 seconds of silence when using the dial modifier in the dial command Connection at 600 bps Connection at 2400 bps
12. 000bps Default 13 33600 bps Default S35 V 34 Symbol Rate baud rate Set the maximum baud rate for V 34 Range 0 5 0 2400 baud 1 2743 baud N A 2 2800 baud N A 3 3000 baud 4 3200 baud 5 3429 baud N A until V 34bis Default 0 2400 baud S36 Reserved 37 Desired Line Connection Speed Default 0 Desired line connection speed This is interlinked with the Fn command If an invalid number is entered the number is accepted into the register but S37 will act as if the default value has been entered 0 Attempt to connect at the highest speed default 3 Attempt to connect at 300 bps 4 Attempt to connect at 1200 bps 6 Attempt to connect at 2400 bps 7 Attempt to connect at 4800 bps 8 Attempt to connect at 7200 bps 9 Attempt to connect at 9600 bps 10 Attempt to connect at 12000 bps 11 Attempt to connect at 14400 bps 12 Attempt to connect at V 34 38 Delay Before Forced Disconnect This register controls how long the modem waits after receiving the ATH command or loss of DTR before it disconnects from the telephone line When connected in an error corrected mode you can use this register to ensure that all data is transmitted from the modem s buffer before the modem disconnects If you set S38 between 0 and 254 the modem waits that number of seconds for the remote modem to acknowledge all data before it disconnects If you set S38 to 255 the modem waits indefinit
13. 33 36000 34667 34000 33600 33333 32000 30667 31200 29333 28000 26400 24000 21600 19200 16800 14400 12000 9600 7200 4800 2400 1200 and 300bps auto fallback Test Modes Analog loopback local digital loopback and remote digital loopback Modulation Data 56000 54667 53333 52000 50667 49333 PCM 48000 46667 45333 42667 41333 40000 38667 37333 36000 34667 33333 32000 30667 29333 28000 bps ITU T V 90 receive only 56000bps 54000bps 52000bps 50000bps 48000bps 46000bps 44000bps 42000bps 40000bps 38000bps 36000bps 34000bps 32000bps K56Flex receive only 33600 31200 28800 26400 24000 21600 TCM 14400 9600 7200bps 9600 4800bps TCM 2400 1200 600bps TCM 1200TX 75RX 75TX 1200RX 300bps FSK Fax 14400 9600 7200 4800bps QAM 4800 2400bps QAM Audio Monitor Built in speaker with software controllable volume control Guard Tone 550 1800 Hz Compatibility Data ITU V 90 56000 54667 53333 52000 50667 49333 48000 46667 45333 42667 41333 40000 38667 37333 36000 34667 33333 32000 30667 29333 28000 bps ITU T V 90 receive only K56flex 56000 54000 52000 50000 48000 46000 44000 42000 40000 38000 36000 34000 32000 K56Flex receive only V Fast Class 28800 26400 24000 21600 19200 16800 14400 V 34 33600 31200 28800 26400 24000 21600 19200 16800 14400 V 32bis 14400 9600 bps asynchronous synchronous ITU T V 32 9600 4800 bps asynchronous synchronous ITU T V 22 bis 2400 1200 bps
14. FAX DATA MODEM USER S MANUAL Notice Bitcom is a registered trademark of BIT Software Inc BitFAX is a registered trademark of BIT Software Inc Crosstalk is a registered trademark of Microstuf Corporation Hayes is a trademark of Microcomputer Products Inc PCTALK is a registered trademark of Headlands Press Inc Smartcom is a trademark of Hayes Microcomputer Products Macintosh is a trademark of Apple Computer Corp i FCC DOC REQUIREMENTS i 1 FCC General Information i 2 FCC Notice i 3 DOC Notice 1 COMMAND REFERENCE 1 1 General Command Information 1 2 AT Commands 1 2 a Commands Preceded by amp 1 2 6 Commands Preceded by 1 2 c Commands Preceded by 1 3 Dial Modifiers 1 4 Commands Not Preceded By AT 1 5 Result Codes 2 S REGISTER REFERENCE 2 1 Register Summary 2 2 Glossary of the S Registers 3 TROUBLESHOOTING GUIDE 4 APPLICATION EXAMPLES 4 1 Dialing a Remote Modem 4 2 Dial a Stored Number 4 3 Manual Answer an Incoming Call 4 4 Auto Answer an Incoming Call 4 5 Voice to Data Switching A CALLER ID COMMANDS B QUICK REFERENCE C GLOSSARY D ASCII CODE TABLE i FCC DOC REQUIREMENTS i 1 FCC General Information The Federal Communications Commission FCC of the United States restricts specific uses of modems and places registration responsibilities on both the manufacturer and the individual user 1 The modem may not be connected to a party line or to a coin operated telephone 2 The modem man
15. add on card modems make sure that the COM port address you have set your modem to corresponds to the appropriate selection in the communications software which you are using 2 Issue the ATZ command to reset your modem The returned result code should be 0 or OK depending on what communications program you are using Your modem is OK if you get one of these responses If there is no response after issuing the ATZ lt CR gt continue to the next step 3 Check if there are any other interface cards in your computer that use the same COM port address as your modem If so you must set your modem to another COM port address Keep in mind that on most systems only two COM ports are available One of them must be used as either 1 or 3 while the other must be used as 2 or 4 For example if a mouse is set to COM 1 your modem should be set to COM2 or COM4 Continue to the next step if the COM port address is OK 4 Issue the command AT amp F amp W lt CR gt if a 0 or OK result code is displayed on the screen your modem is OK Otherwise contact your dealer for assistance Your Modem Does Not Dial Out Make sure that your modem responds normally If you can communicate through the keyboard check whether the modem is properly connected to the phone line Your Modem Does Not Connect After It Has Dialed a Phone Number The problem may have several causes The phone line may be too noisy or the telephone cord may be poor Try the line with a regula
16. d S86 Call Failure Reason Code 91 0 15 dBm 11 OBh PSTN Transmit Attenuation Level Fig 2 1 S Register Summary 2 2 Glossary of the S Registers so Number of Rings Before Auto Answer SO determines the number of rings that must be received before the modem automatically answers an incoming call For example when S0 3 the modem automatically answers after the third ring When S0 0 the modem does not automatically answer an incoming call it stays on hook until the A command is issued manually to answer the incoming call Range 0 255 rings Default 0 S1 Ring Count S1 automatically increments its value by one each time the modem receives a ring while in the command state S1 is reset to zero if no ring is detected within 8 seconds Range 0 255 rings Default 0 S2 ASCII Value of Escape Character S2 stores the ASCII value of the escape character Setting register S2 to a value greater than 127 disables the escape command and you cannot return to the command state With escape disabled in the on line state the modem cannot hang up until the power is turned off or the remote modem hangs up Range 0 127 ASCII decimal Default 43 3 ASCII Value of Carriage Return S3 stores the ASCII value of the carriage return character Pertains to asynchronous operation only Range 0 127 ASCII decimal Default 13 S4 ASCII Value of Line Feed Character S4 stores the ASCII value of the line feed character if your computer do
17. e return A Tone Control Toggles calling tone enable disable applicable to current dial attempt only L Re dial Last Number The modem will re dial the last valid telephone number The L must be immediately after the D with all the following characters ignored S Dial a Stored Number S is used to dial one of four numbers stored in nonvolatile memory For example instead of entering a dial string you can use this command Command ATDTS 1 lt CR gt S 0 9 T Touchtone Dialing T placed ahead of a number tells the modem to dial a number using touchtone dialing WwW Wait for Dialtone W placed after a number tells the modem to wait up to 30 seconds to detect a one second continuous dialtone before dialing the next number W is most often used in a PBX system to wait for the dialtone of an outside telephone line 1 4 Commands Not Proceded by AT Two commands A and are neither preceded by the attention code AT nor followed by a carriage return Al Repeat Command A repeats the execution of the last command line stored in the command buffer If the last command line is invalid the ERROR result code will appear on the screen Note that A cannot be preceded by AT if it is ERROR will appear on the screen Escape returns to the on line command state command state without breaking the established connection from the on line state To escape stop transmitting data wait at least one escape guard time
18. ect cables and a shielded power cord must be employed with this equipment to insure compliance with the pertinent RF emission limits governing this device Changes or modifications not expressly approved by the manufacturer could void the user s authority to operate this equipment NOTE The manufacturer is not responsible for any radio or T V interference caused by unauthorized modifications to this equipment Such modifications could void the user s authority to operate the equipment i 3 DOC Notice Notice The Canadian Department of Communications label identifies certified equipment This certification means that the equipment meets certain telecommunications network protective operational and safety requirements The Department does not guarantee the equipment will operate to the user s satisfaction Before installing this equipment users should ensure that it is permissible to be connected to the facilities of the local telecommunications company The equipment must also be installed using an acceptable method of connection In some cases the company s inside wiring associated with a single line individual service may be extended by means of a certified connector assembly telephone extension cord The customer should be aware that compliance with the above conditions may not prevent degradation of service in some situations Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by the su
19. een made before examining DTR This allows the modem to ignore an ON to OFF transition of DTR giving the user time to disconnect the modem from the asynchronous terminal and attach it to a synchronous terminal without forcing the modem back to the asynchronous command mode During this time the value for S25 is read in whole seconds In all other modes and after call establishment in synchronous modes I and 4 the value is read in 1 100 seconds In any mode a change in DTR ON or OFF that persists for a period shorter than the value held in S25 is ignored by the modem while it is in data mode Range 0 255 1 second for synchronous mode 1 0 01 second otherwise Default 5 26 Reserved 27 Reserved 28 Reserved 30 Inactivity Disconnect Timer This register determines the length of time in seconds the modem waits before disconnecting when no data is sent or received This only operates in amp Q5 and amp Q6 modes a value of 0 in this register disables the timer Range 0 255 tenths of a second Default 0 disable 32 XON Character Range 0 255 ASCII decimal Default 17 S33 XOFF Character Range 0 255 ASCII decimal Default 19 S34 56K Data Rate bit rate Set the maximum bit rate for 56K Range 0 32 bit rate 32000bps S34 2000bps V 34 Data Rate bit rate Set the maximum bit rate for V 34 Range 0 8 2400 baud 1 10 3000 baud 1 11 3200 baud 1 13 3429 baud bit rate S34 1 2
20. ely for the remote modem to acknowledge all data Range 0 255 seconds Default O Default S39 Reserved S40 Reserved S41 Reserved 42 Reserved S43 Reserved S44 Reserved S45 Reserved S46 Reserved S47 Reserved S48 Reserved S82 Reserved S86 Call Failure Reason Code 0 Normal disconnect no error 4 Loss of carrier 5 V 42 negotiation failed to detect an error correction modem at remote end 6 No response to complete negotiation 9 No common protocol 12 Remote initiated a normal disconnect 13 Remote modem did not respond after 10 message retransmissions 14 Protocol violation 15 Compression failure 20 Hang up by inactivity time out S91 PSTN Transmit Attenuation Level Sets the transmit attenuation level from 0 to 15 dBm for the PSTN mode resulting in a transmit level from 0 to 15 dBm Range 0 to 15 dBm Corresponding to 0 to 15 dBm transmit level Default 11 10 dBm transmit level 3 TROUBLE SHOOTING This chapter describes common problems in the installation configuration and regular usage of your Fax Data Modem To test the Fax Data Modem a communication software package is needed and the package must include a mode that allows you to operate your Fax Data Modem by directly issuing internal commands to the modem Follow the procedures in the following sections to resolve these common problems No Response From Your Modem 1 If you are using the internal
21. end Default The assumed value that is used for a command parameter when no other value is explicitly provided DCD Data Carrier Detect DCE Data Communication Equipment DTE Data Terminal Equipment DTMF Dual Tone Multifrequency for touchtone dialing DTR Data Terminal Ready FSK Frequency Shift Keying Make Break Ratio The ratio of the off hook make to on hook break interval is the make break ratio in pulse dialing Modem A combination of the words MOdulator and DEModulator Modems transform digital data into analog signals and back again Nonvolatile Memory An area of memory inside the modem where the default configuration profile is stored Values recorded in this memory will not be lost when the power is turned off Off Hook The condition when the modem has picked up the telephone line Off Line Command State A modem state in which the modem accepts interprets and executes commands from an asynchronous computer or terminal On Hook The condition when the modem has not picked up the telephone line the telephone is hung up On Line A carrier signal link with a remote modem has been established communication is in progress On Line State A modem state in which the modem is connected with a remote modem Data can be sent or received from the remote modem in this state No commands will be accepted from the modem except the escape command which will bring the modem into the on line command s
22. es not recognize the default as a line feed change the value A value greater than 127 disables the line feed When disabled the line feed character that precedes or follows a result code is canceled Pertains to asynchronous operation only Range 0 127 ASCII decimal Default 10 Line Feed S5 ASCII Value of Backspace Character S5 stores the ASCII value of the backspace character The backspace is used to edit a command line If your computer does not recognize the default as a backspace change the value Pertains to asynchronous operation only Set S5 to any value from 0 to 31 or 127 Do not set it to any value from 32 through 126 because these values correspond to printable ASCII characters A value greater than 127 disable the backspace and makes it impossible to edit a command line Range 0 127 ASCII decimal Default 8 Backspace S6 Wait Time before Blind Dialing S6 controls how long the modem waits after it goes off hook before it dials the first digit of the telephone number The modem always pauses for at least 2 seconds even if S6 is set to less than two seconds Range 2 255 seconds Default 2 Default S7 Wait for Carrier after Dial S7 controls how long the modem waits for a carrier signal from a remote modem after originating a call or from the calling modem after going off hook when answering a call S7 also controls how long the modem waits for a one second continuous dialtone after dialing a number f
23. has requested private service and where O indicates that the calling number information is not available or out of service at the calling location NAME NAME lt listing name gt where lt listing name gt is the subscription name MESG MESG lt data tag gt lt length of message gt lt data gt lt checksum gt in printable ASCII hex numbers This tag indicates a data item not listed above The message is only possible for Multiple Message Format Notes 1 The modem does not present any Caller ID information if the DCE detects a checksum error in the Caller ID packet 2 In the event of an unrecognized data tag the modem will present the data in ASCII hex numbers following the MESG tag Example of Formatted Form Reporting 1 The following example illustrates the standard Caller ID message packet RING DATE 0321 TIME 1405 NMBR 504551234 NAME ANOTHER RING RING 2 The following example illustrates the case where the tag of the packet is not recognized by the modem RING MESG 06034242431 RING RING Unformatted Form Reporting The modem presents all information and packet control information found in the message The modem however excludes the leading U s Channel seizure information from the presentation The packet is presented in ASCII printable hex munbers the modem does not insert spaces or line feeds for formatting between bytes or words of the packet The modem does not detect the checksum of the packet
24. he rest of this manual Commands Commands not Commands Preceded by AT Preceded by AT Af Escape Standard AT Extended AT Command Command Commands Commands Fig 1 1 System of Commands 1 1 General Command Information Except for the A command and the escape command described in Section 1 4 all commands must be prefixed with the attention code AT For instance the A command below would be entered as AT A lt CR gt Without the AT prefix the command line cannot be executed Once entered AT cannot be deleted with the Backspace or Delete key More than one command can be placed on a single line and if desired separated with spaces for readability Once the carriage return Enter key is pressed the command line is executed A line with no carriage return is ignored The modem accepts either upper or lower case characters in the command line and ignores any spaces within or between commands Typing errors can be corrected with the Backspace key Exceptions are noted in the description of specific commands Variables r and x are listed in italics Punctuation symbols use as dial modifiers are listed alphabetically according to their English names at the beginning of Section 1 3 Where two commands are separated by a slash either command will have the same effect For example if the command is listed as BO B issuing either BO or B will have the same effect 1 2 AT Commands A Go On line in Answer Mode This command
25. hone and begin data communication with the remote modem A CALLER ID COMMANDS Option CIDn Caller ID Enables or Disables Caller ID This command only apply to models which support the Caller ID function CID 0 Disables Caller ID Default CID 1 Enables Caller ID with formatted presentation to the DTE The modem will present the date items in a lt Tag gt lt Value gt pair format The expected pairs are data time caller code telephone number and name CID 2 Enables Caller ID with unformatted presentation to the DTE The modem will present the entire packet of information excluding the leading U s in ASCII printable hex numbers Result Codes OK n 0 or 2 ERROR Otherwise Inquiries CID Retrieves the current Caller ID mode from the modem CID Returns the mode capabilities of the modem in a list with each element separated by commas Formatted Form Reporting The modem presents the data in the lt tag gt lt value gt pair format as described in the table below Spaces are present on both sides of the equal sign TAG Description DATE DATE MMDD where MM is the month number 01 to 12 and DD is the day number 01 31 TIME TIME HHMM where HH is the hour number 00 to 23 and MM is the minute number 00 to 59 NMBR NMBR lt number gt or P or O where lt numbers gt is the telephone number of the caller where P indicates that the calling number information is not available since the orginating caller
26. latile RAM Select the Default Profile Store Telephone Numbers n 0 to 9 Select Maximum MNP Block Size Transmit Break to Remote Modem to Modem Flow Control XON XOFF Break Control Operating Mode Control Enable Disable Data Compression En Enable Disable Line Quality Monitor and Auto Retrain or Fallback Fall Forward Q Line Signal Quality Answer Pause Initiate a Hookflash 4 Return to Command State after Dialing A Tone Control L Re dial Last Number S Dial a Stored Number T Touchtone Dialing WwW Wait for Dialtone A Repeat Command Escape C GLOSSARY ASCII An acronym for American Standard Code for Information Exchange ASCII is a seven bit code which defines 128 standard characters including control characters letters numbers and symbols An extra 128 characters comprise the extended ASCII set Baud Rate The transmission rate between two serial devices e g modems fax machines etc Measured in Bits Per Second Blind Dialing In blind dialing the modem continues to dial regardless of the existence of a dialtone ring or busy signal BPS Bits Per Second the number of bits that can be transmitted in one second Carrier Signal The analog data signal that a modem sends over telephphone wires COMx Where x 1 2 3 or 4 COMx is the name address of serial communications ports on personal computers Each serial port in a personal computer has a different number CTS Clear To S
27. mile mode FCLASS 1 the only message sent to indicate a connection is CONNECT without a speed indication X0 Send OK CONNECT RING NO CARRIER and NO ANSWER Busy and Dial Tone Detection are disabled X1 Send X0 messages and CONNECT speed X2 Send X1 messages and NO DIALTONE X3 Send X2 messages except NO DIALTONE BUSY and RING BACK X4 Send all responses default Yn Enables or Disables Long Space Disconnect YO Y Disables Long Space Disconnect default Y1 Enables Long Space Disconnect Zn Reset Zn which must be placed at the end of the command line resets the active configuration of the modem to the stored configuration saved in nonvolatile RAM hangs up the modem and clears the command buffer Z0 Z Resets the modem and loads stored configuration 0 Z1 Resets the modem and loads stored configuration 1 1 2 a Commands Preceded by amp amp Cn Select DCD Options amp C0 amp C Maintains an ON status for the Data Carrier Detect DCD default amp C1 Uses the actual state of the carrier from the remote modem for DCD amp Dn DTR Option amp F amp Gn amp Kn amp DO DTR is assumed on default amp D1 DTR drop causes modem back to command mode without disconnecting amp D2 DTR drop causes modem to hang up amp D3 DTR drop causes modem to be initialized amp Y determines which profile is loaded Fetch Factory Configuration amp FO Recall factory profile 0 default amp F1 Recall factory profile
28. nnection at 38666 bps CARRIER 41333 119 Connection at 41333 bps CARRIER 42666 120 Connection at 42666 bps CARRIER 45333 121 Connection at 45333 bps CARRIER 46666 122 Connection at 46666 bps CARRIER 49333 123 Connection at 49333 bps CARRIER 50666 124 Connection at 50666 bps CARRIER 53333 125 Connection at 53333 bps CARRIER 54666 126 Connection at 54666 bps 2 S REGISTER REFERENCE Your modem has status registers These registers are memory locations inside your modem which control your modem s operation You usually do not have to worry about setting any register because the default values work for most applications The S registers are summarized in Fig 2 1 along with their default values Registers denoted with an may be stored in one of the two user profiles by entering the amp Wn command One of these profiles may be loaded at any time by using the Zn command The factory default values are stored in ROM and are loaded into the active configuration at power up or by the Zn command In addition the designated default profile is subsequently loaded and may change some of the factory default values The designated default profile can be changed by entering the amp Yn command where n is one of the two possible user profiles The factory defaults can be loaded at any time by entering the amp F command 2 1 S Register Summary The following chart summarizes your modem s registers Default Reg Range Unit Dec Hex
29. ollowed by the W dial modifier If the modem detects a one second continuous dialtone within the specified wait time it proceeds to dial Range 1 255 seconds Default 50 S8 Pause Time for Comma mom S8 controls how long the modem pauses when a comma is encountered in a dial string while executing a dial command Range 0 255 seconds Default 2 9 Carrier Detect Response Time S9 determines how long a carrier signal must be present for the modem to confirm it The longer the response time the easier it is for the modem to correctly recognize a carrier without mistaking other signals or transient noise on the line as a carrier Range 1 255 tenths of a second Default 6 0 6 second 10 Delay between Loss of Carrier and Hang Up S10 determines the delay time between the loss of a carrier from the remote modem and hang up This allows for a temporary loss of carrier without causing the local modem to disconnect When S10 is set to 255 the modem functions as if a carrier is always present The actual interval the modem waits before disconnecting is the value in S10 minus the value in S9 Therefore the value in S10 must be greater than that in S9 or else the modem disconnects before it recognizes the carrier Range 1 255 tenths of a second Default 14 1 4 seconds S11 DTMF Touch tone Tone Duration S11 determines the duration and spacing of tones for Dual Tone Multifrequency DTMF dialing This value has
30. on connection CLASS 5 established COMPRESSION 67 V 42bis data compression connection established V 42bis COMPRESSION 69 Connection established without data compression NONE PROTOCOL NONE 76 Connection established without error correction PROTOCOL LAPM 77 V 42 LAPM error correction connection established PROTOCOL ALT 80 MNP 3 4 error correction connection established CARRIER 31200 90 Carrier rate of 31200 bps CARRIER 33600 91 Carrier rate of 33600 bps CONNECT 31200 95 Connection at 31200 bps CONNECT 33600 96 Connection at 33600 bps CARRIER 32000 97 Connection at 32000 bps CARRIER 34000 98 Connection at 34000 bps CARRIER 36000 99 Connection at 36000 bps CARRIER 38000 100 Connection at 38000 bps CARRIER 40000 101 Connection at 40000 bps CARRIER 42000 102 Connection at 42000 bps CARRIER 44000 103 Connection at 44000 bps CARRIER 46000 104 Connection at 46000 bps CARRIER 48000 105 Connection at 48000 bps CARRIER 50000 106 Connection at 50000 bps CARRIER 52000 107 Connection at 52000 bps CARRIER 54000 108 Connection at 54000 bps CARRIER 56000 109 Connection at 56000 bps CARRIER 58000 110 Connection at 58000 bps CARRIER 60000 111 Connection at 60000 bps CARRIER 28000 112 Connection at 28000 bps CARRIER 29333 113 Connection at 29333 bps CARRIER 30666 114 Connection at 30666 bps CARRIER 33333 115 Connection at 33333 bps CARRIER 34666 116 Connection at 34666 bps CARRIER 37333 117 Connection at 37333 bps CARRIER 38666 118 Co
31. on the screen as RING RING Seeing that you may issue the ATA command to answer the call This command must be entered within the quiet interval between any two rings 4 4 Auto Answer an Incoming Call Command line AT S0 2 amp W amp Y lt CR gt Auto answer can be enabled by changing the setting of the S register SO to a value between 1 and 255 In the above command line SO 2 instructs the modem to answer an incoming call automatically after the 2nd ring The amp W command writes this configuration to profile 0 in NVRAM amp Y command instruct the modem to load profile 0 as the active configuration on power up The last two commands make S0 2 the default value at power up or reset This example also shows the insertion of space between two neighboring commands to make the command line more readable 4 5 Voice to Data Switching Command line ATA lt CR gt or ATX1D lt CR gt If you are talking with a remote modem user through the telephone set and want to initiate data communication with the remote modem follow the procedures below 1 You or the remote user issue an ATA command first to switch to data communication 2 When the person on the other end hears an answer tone from the phone issues an ATX1D command X1 to disable the dial tone monitor to instruct the modem to go off hook and wait for a carrier If connection is successful the CONNECT XXXX result code will be displayed on the screen Now you can hang up your p
32. pplier Any repairs or alterations made by the user to this equipment or equipment malfunctions may give the telecommunications company cause to request the user to disconnect the equipment Users should ensure for their own protection that the electrical ground connections of 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 attempt to make such connections themselves but should contact the appropriate electric inspection authority or electrician as appropriate The Load Number LN assigned to each terminal device denotes the percentage or the total load to be connected to a telephone loop which is used by the device to prevent overloading The termination on a loop may consist of any combination of devices subject only to the requirement that the total of the Load Numbers of all the devices does not exceed 100 1 COMMAND REFERENCE This chapter provides an alphabetized reference with examples for all commands for the modem The system of commands is depicted below in Figure 1 1 To use these commands for dialing or configuring the modem make sure the communications software package you will be using lets you operate the modem through its internal commands If your software permits use of the modem s internal commands read this chapter If not read your software user s manual and ignore t
33. r phone Also the remote modem may not recognize your modem s baud rate Your Can t Transmit After You Have Connected to the Remote Modem In this case check the communication parameters of the remote modem then configure your software to the same number of data bits stop bit and parity 4 APPLICATION EXAMPLES 4 1 Dialing a Remote Modem Command line ATDP9WT002 886 7128423 lt CR gt This command line instruct the modem to dial a remote modem through a PBX The modem first use pulse dialing to dial 9 the access code of the PBX wait for outside dial tone and then use touch tone dialing to dial 002 once a one second continuous dial tone is detected within 30 seconds pause for 2 seconds if S8 2 and then dial 8867128423 4 2 Dial a Stored Number Command line AT amp Z2 T03 709394 lt CR gt Command line ATDS 2 lt CR gt The first command line store the dial string T03 709394 to the 3rd location in NVRAM Afterwards you can use the second command line to dial this stored number The dial string T03 709394 will appear on the screen to indicate the number being dialed 4 3 Manual Answer an Incoming Call Command line ATA lt CR gt The factory setting of the S register SO is SO 0 This condition disables the auto answer capability so that you must issue an ATA command to answer a call At power up your modem always monitors if there are incoming rings If incoming rings are detected your modem will display result codes
34. tate On Line Command State A modem state in which the modem can accept or execute commands from an asynchronous computer or terminal while remaining connected with the remote modem The user can return the modem to the on line state by issuing the ATOn command or put it into the off line command state by issuing command such as ATZ or ATH Parity An error checking method by which the modem verifies that the data just sent is correct pps Pulse per second Profile A list of default settings Protocol A technical specification for serial communications the protocols supported by the modem are listed in Appendix A PSK Phase Shift Keying Pulse Dialing A dialing form in which each digit is represented by a series of pulses Rotary telephones all use pulse dialing QAM Quadrature Amplitude Modulation Result Codes The response the modem returns to the screen upon executing a command RAM Random Access Memory ROM Read Only Memory A chip inside the modem which stores the factory default settings This memory cannot be changed RTS Request To Send RX Reception S Register RAM locations in the modem which store the active configuration Serial Port See COMx TCM Trellis Coded Modulation Touchtone Dialing A dialing format in which each digit is represented by a musical frequency TX Transmission D ASCII CODE TABLE Decimal Hex Value Decimal Hex Value Decimal Hex Value Decimal Hex Value
35. te modem break is passed to the DTE as follows In non error correction mode direct the break length is passed in non error correction mode normal and in error correction mode a 300 ms break is passed Gn Modem to Modem Flow Control XON XOFF Enables or disables modem flow control during a Normal Mode connection Since Reliable Mode has its own method of flow control the Gn command is ignored when error correction is selected However DTE to modem flow control remains active during reliable link GO Disable XON XOFF flow control modem to modem default G1 Enable XON XOFF flow control modem to modem Kn Break Control Determines the modem s response when a BREAK is received from the DTE or the remote modem according to the following conditions When a BREAK is received from the DTE during Normal or MNP Mode KO 2 4 Modem enters Command Mode waiting for an AT command without sending a BREAK to the remote modem K1 Modem clears the terminal and modem buffers K3 Modem does not clear the buffers K5 Modem sends a BREAK to the remote modem in sequence with any transmitted data default When a BREAK is received from the remote modem during Normal Mode KO 1 Modem clears the terminal and modem buffers K2 4 Modem does not clear the buffers K4 5 Modem sends a BREAK in sequence with any transmitted data When a BREAK is received from the DTE during Direct Mode KO 2 4 Modem sends a BREAK to the remote modem
36. to assume that all subsequent dial commands are tone dial Vn Select Word or Digit Result Codes VO V Displays result codes in digital format v1 Displays result codes in verbose format default Wn Negotiation Progress Reporting An additional set of result codes can be enabled with the W command to report progress of the negotiation phase of error correction mode These codes report the carrier speed 300 bps 2400 bps and the error correction protocol These messagescan also be reported in either numeric or verbose form For example both 77 and PROTOCOL LAP M indicate that the error correction protocol is LAP M If the error correction link is negotiated and a connection is made the appropriate CONNECT XXXX message reports another connection speed wo Report DTE speed only After connection there will be no message about what Error Correction or Data Compression protocol is in use default Wi Report DCE speed Error Correction Data Compression protocol and DTE speed W2 Report DCE speed only Xn Extended Result Codes This command selects which subset of the result messages will be used by the modem to inform the DTE of the results of commands Blind dialing is enabled or disabled by country parameters If the user wishes to enforce dial tone detection a W can be placed in the dial string see D command Note that the information below is based upon the default implementation of the X results table If the modem is in facsi
37. uality DAA dependent Returns the higher order byte of the EQM value Based on the EQM value retain or fallback fall forward may be initiated if enabled by E1 or E2 1 3 Dial Modifiers This section describes all of the dial modifiers which are used in dial strings Answer placed after a phone number this modifier tells the modem to wait for 5 seconds of silence before dialing the next number in the dial string is usually used to access a secure computer system that provides a silent answer as permission for further entrance Pause wow placed anywhere in the dial string tells the modem to pause for the number of seconds specified by S register S8 before processing the rest of the dial string Initiate a Hookflash placed anywhere in the dial string tells the modem to initiate a hookflash which means to hang up for 0 5 seconds and then go off hook again before processing the rest of the dial string This modifier allows access to PBX features like call transferring Return to Command State after Dialing 3 which must be placed at the end of the dial string returns to the command state after dialing the number placed ahead of it A long telephone number would overflow the 40 character command buffer if placed all in one command line so it must be broken into two or more command lines Each part includes weit part of the number and all but the last command line end with the followed by a carriag
38. ufacturer must make any repairs to the modem to maintain valid FCC registration 3 Notification to the telephone company is no longer required prior to connecting registered equipment but upon request from the telephone company the user shall tell the telephone company which line the equipment is connected to as well as the registration number and ringer equivalence number of the registered protective circuitry FCC information is printed on a label on the bottom of the modem i 2 FCC Notice This equipment has been tested and found to comply with the limits for a digital device pursuant to Subpart B of Part 15 of the FCC rules These limits are designed to provide reasonable protection against harmful interference in a residential installed and used the instructions may cause interference to radio communications 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 determined by turning the equipment off and on the user is encouraged to try and correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a curcuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help Shielded interconn
39. witch from voice conversation to data communication or to call a remote modem in leased line operation mode En Command Echo E0 E Disables command echo E1 Enables command echo default Hn Hang Up HO H Goes on hook hangs up H1 Goes off hook ready to dial In Identification 10 1 Report the product code i Report the hardware checksum 12 Report OK 13 Report firmware revision 14 Report OEM defined identifier string Mn Monitor Speaker On Off M0 M Speaker is always off M1 Speaker is off while receiving carrier default M2 Speaker is always on M3 Speaker disabled while dialing or receiving carrier Nn Automode Enable NO Automode detection is disabled N1 Automode detection is enabled This command is equivalent to FO default On Return to On Line Data Mode o0 Enters on line data mode without a retrain Handling is determined by the Call Establishment task Generally if a connection exists this command connects the DTE back to the remote modem after an escape 01 Enters on line data mode with a retrain before returning to on line data mode Q Result Code Display Determines whether the modem sends the result codes to the DTE Qo Allows the modem to send result codes to the DTE Q1 Prohibits the modem from sending result codes to the DTE Sn Reading and Writing to S Registers Sn Return the value of register n Sn m Set register n to value m T Set Tone Dial as Default Causes the modem
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