Askey Computer 1456VQH75A FAX/Modem Card User Manual

Askey Computer Corp FAX/Modem Card Users Manual

Users Manual

FAX/MODEM CARDFCC ID:H8N1456VQH75AUSER'S MANUALTable of Contentsi - FCC/DOC REQUIREMENTS i.1 FCC General Informationi.2 FCC Noticei.3 DOC Notice1 - INTRODUCTION2 - COMMAND REFERENCE2.1 General Command Information2.2 AT Commands2.2.a Commands Preceded by &2.2.b Commands Preceded by \2.2.c Commands Proceeded by %2.2.d Commands Preceded by +2.2.e Commands Preceded by **2.3 Dial Modifiers2.4 Commands Not Preceded By AT2.5 Result Codes3 - S REGISTER REFERENCE3.1 Register Summary3.2 Glossary of the S Registers
4 - TESTING4.1 Local Analog Loopback4.2 Local Analog Loopback with Self-Test5 - TROUBLESHOOTING GUIDE6 - APPLICATION EXAMPLES6.1 Dialing a Remote Modem6.2 Dial a Stored Number6.3 Manual Answer an Incoming Call6.4 Auto Answer an Incoming Call6.5 Voice to Data SwitchingA - MNP 10 COMMANDSB - CALLER ID COMMANDSC - TECHNICAL SPECIFICATIONSD - QUICK REFERENCEE - GLOSSARYF - ASCII CODE TABLEi - FCC/DOC REQUIREMENTS i -1 FCC General InformationThe 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 manufacturer 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 theequipment is connected to as well as the registration number and ringer equivalence number of theregistered protective circuitry. FCC information is printed on a label on the bottom of the modem.i - 2 FCC Notice
NOTEThis equipment has been tested and found to comply with the limits for a Class B digital device, pursuant toPart 15 of the FCC Rules. These limits are designed to provide reasonable protection. This equipmentgenerates, uses and can radiated radio frequency energy and, if not installed and used in accordance with theinstructions, may cause harmful interference to radio communications. However, there is no guarantee thatinterference will not occur in a particular installation If this equipment does cause harmful interference toradio or television reception, which can be determined by turning the equipment off and on, the user isencouraged to try to 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 circuit different from that to which the receiver is connected.-Consult the dealer or an experienced radio/TV technician for help.Changes or modifications not expressly approved by the party responsible for compliance could void theuser‘s authority to operate the equipment.i - 3 DOC NoticeNotice: The Canadian Department of Communications label identifies certified equipment. Thiscertification means that the equipment meets certain telecommunications network protective, operationaland safety requirements. The Department does not guarantee the equipment will operate to the user'ssatisfaction.Before installing this equipment, users should ensure that it is permissible to be connected to the facilities ofthe local Telecommunications Company. The equipment must also be installed using an acceptable methodof connection. In some cases, the companies inside wiring associated with a single line individual servicemay be extended by means of a certified connector assembly (telephone extension cord). The customershould be aware that compliance with the above conditions might not prevent degradation of service insome situations.Repairs to certified equipment should be made by an authorized Canadian maintenance facility designatedby the supplier. 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 precautionmay be particularly important in rural areas.Caution: Users should not attempt to make such connections themselves, but should contact the appropriateelectric inspection authority, or electrician, as appropriate.The Load Number (LN) assigned to each terminal device denotes the percentage or the total load to beconnected to a telephone loop which is used by the device, to prevent overloading. The termination on aloop may consist of any combination of devices subject only to the requirement that the total of the LoadNumbers of all the devices does not exceed 100.
Note: Locate an analog telephone line. Many offices have digital telephone lines, which will notwork with a modem.Warning: Do not connect your modem to a digital telephone line. Modems are designed for use onlywith analog telephone lines; connecting to a digital telephone line may damage the modem.Verify that the line is analog before connecting.Fax machines use analog telephone lines. If you can't find an analog voice line, find a fax machineand use its line.1 - INTRODUCTIONCongratulations on your purchase of this outstanding Fax/Data Modem. This manual describes how tooperate your new Fax/Data Modem.Instructions for installing your Fax/Data Modem will be found in the Installation Manual, while theinformation in this manual, deals exclusively with the operation of the modem after it is installed, such asthe command set, the internal configuration registers, troubleshooting and testing.Features:These Fax/Data Modems combine the features of a 56000(receive only)/33600/28800/14400/9600 bps datamodem and a 14400/9600 bps FAX modem. Your new Fax/Data Modem gives your personal computer theability to send and receive FAX messages over the telephone line like a standard FAX machine. YourFax/Data Modem also allows your PC to communicate with other personal computers, terminals or BBS's(Bulletin Board Systems) through the data modem functions.When used as a data modem your Fax/Data Modem uses the standard AT command set and is fullycompatible with ITU-T V.42, V.42bis, V.34 (ANNEX 12), V.32bis, V.32, V.22bis, V.23, V.22, V.21,MNP 2-5, Bell 103, 212A, K56flex and/or V.90. When used as a Fax/Data Modem it communicates withall ITU-T Group 3 FAX machines and is compatible with ITU-T V.27ter and V.29, V.17, T.4 and T.30.Switching between DATA mode operation and FAX mode operation of your Fax/Data Modem is donethrough its firmware, no hardware settings are required.If you are already familiar with the use of a modem and the Hayes AT command set, this modem will beextremely easy for you to use. Just read the installation procedures in the installation manual and you areready to begin operation. If you are new to modem communications, we recommend that you read throughthis manual first. If you come across terms that you don't understand, consult the glossary. Words inboldface type are command names, commands, or default settings. Carriage returns (Enter) are noted with<CR> or [ENTER]; this does not mean to enter these characters literally; but instead to press the Enter key.The communication software, which should be used, depends on the kind of machine that you are going tocommunicate with. If you are going to call a FAX machine then you must use the Fax software. If themachine that you are going to communicate with is a modem then you must use a data modemcommunications software.Note: This manual is written to be used for several models of Fax/Data Modems. Some of theinformation in this manual may not apply to your fax/data modem.All the description in this manual about Caller ID, V.90 and Fax class 2 applies only to the modelswhich support these functions.
2 - COMMAND REFERENCEThis chapter provides an alphabetized reference with examples for all commands for the modem. Thesystem of commands is depicted below in Figure 2-1.To use these commands for dialing or configuring the modem, make sure the communications softwarepackage you will be using lets you operate the modem through its internal commands. If your softwarepermits use of the modem's internal commands, read this chapter. If not, read your software user's manualand ignore the rest of this manual.2-1 General Command InformationExcept for the A/ command and the +++ escape command described in Section 2.4, all commands must beprefixed with the attention code AT. For instance, the A command (below) would be entered as: "ATA<CR>". Without the AT prefix, the command line cannot be executed. Once entered, AT cannot bedeleted with the Backspace or Delete key.More than one command can be placed on a single line and, if desired, separated with spaces forreadability. Once the carriage return (Enter) key is pressed, the command line is executed. A line with nocarriage return is ignored.The modem accepts either upper or lower case characters in the command line and ignores any spaceswithin or between commands. Typing errors can be corrected with the Backspace key. Exceptions arenoted in the description of specific commands.Variables (r and x) are listed in Italics. Punctuation symbols (, ; ! @) use as dial modifiers are listedalphabetically according to their English names at the beginning of Section 2.3. Where two commands areseparated by a slash, either command will have the same effect. For example, if the command is listed asB0/B, issuing either B0 or B will have the same effect.2-2 AT CommandsA Go On-line in Answer ModeThis command instructs the modem to go off-hook immediately and then make a handshake with the remotemodem. 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 datacommunication.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 beenentered at the 300 bps or 1200 bps data rate.B1 Selects BELL 300 or BELL 212A protocol once the command line prefix AT has beenentered at the 300 or 1200 bps data rate. (Default)Cn Carrier Transmit ControlControls 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. TheC0 option is NOT valid.C0 Not permitted; returns ERROR result code.C1 Normal transmits carrier switching (preset).D Go On-line in Originate ModeD instructs the modem to go off-hook immediately and automatically dial the number contained in the dialstring 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 switch from voice conversation to datacommunication or to call a remote modem in leased-line operation mode.En Command EchoE0/E Disables command echo.E1 Enables command echo. (Default)Hn Hang UpH0/H Goes on-hook. (Hangs up)H1 Goes off-hook. (ready to dial)In IdentificationI0/I Report the product code.I1 Report the hardware checksum.I2 Report " ERROR".I3 Report firmware revision.I4 Report OEM defined identifier string.I5 Report the country code parameter.I6 Report modem data pump model and internal code revision.
I7 Report the DAA code.Ln Control Speaker VolumeL0/L Low volume. L1 Low volume. (Default) L2 Medium volume.L3 High volume.Mn Monitor Speaker On/OffM0/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 EnableN0 Automode detection is disabled.N1 Automode detection is enabled. This command is equivalent to F0. (Default)On Return to On-Line Data ModeO0 Enters on-line data mode without a retrain. Handling is determined by the CallEstablishment task. Generally, if a connection exists, this command connects the DTEback to the remote modem after an escape (+++).O1 Enters on-line data mode with a retrain before returning to on-line data mode.P Set Pulse Dial as DefaultCauses the modem to assume that all subsequent dial commands are pulse dials. You may omit the " P "from the dial strings.Q Result Code DisplayDetermines whether the modem sends the result codes to the DTE.Q0 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? Reads S Registers: Read the contents of the S register specified by 'n'.Sn=x Writing to Registers: Writes the value of x to the specified S register. All the registers will return the OKresponse if x is a legal value. However some registers will not actually write the value;these are: S1, S13-S15, S20-S24, and S27. (n=0-95, x=0-255)
T Set Tone Dial as DefaultCauses the modem to assume that all subsequent dial commands are tone dial.Vn Select Word or Digit Result Codes V0/V Displays result codes in digital format. V1 Displays result codes in verbose format. (Default)Wn Connect Message ControlThis command controls the format of CONNECT messages. The parameter value, if valid, is written to S31bits 2 and 3. Note that the Wn command can be overridden by register S95 bits (see S95 description).W0 Upon connection, the modem reports only the DTE speed (e.g., CONNECT 19200).Subsequent responses are disabled. (Default)W1 Upon connection, the modem reports the line speed, the error correction protocol, andthe DTE speed, respectively. Subsequent responses are disabled.W2 Upon connection, the modem reports the DCE speed (e.g., CONNECT 14400).Subsequent responses are disabled.Xn Extended Result CodesThis command selects which subset of the result messages will be used by the modem to inform the DTE ofthe 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 thedefault implementation of the X results table.If the modem is in facsimile mode (+FCLASS=1 or 2), the only message sent to indicate a connection isCONNECT without a speed indication.X0 Disables monitoring of busy tones unless forced otherwise by country requirements;send only OK, CONNECT, RING, NO CARRIER, ERROR, and NO ANSWER resultcodes. Blind dialing is enabled/disabled by country parameters. If busy tone detection isenforced and busy tone is detected, NO CARRIER will be reported. If dial tone detectionis enforced or selected and dial tone is not detected, NO CARRIER will be reportedinstead of NO DIAL TONE. The value 000b is written to S22 bits 6, 5, and 4,respectively.X1 Disables monitoring of busy tones unless forced otherwise by country requirements;send only OK, CONNECT, RING, NO CARRIER, ERROR, NO ANSWER, andCONNECT XXXX(XXXX=rate). Blind dialing is enabled/disabled by country parameters.If busy tone detection is enforced and busy tone is detected, NO CARRIER will bereported instead of BUSY. If dial tone detection is enforced or selected and dial tone isnot elected, NO CARRIER will be reported instead of NO DIAL TONE. The value 100b iswritten to S22 bits 6, 5, and 4, respectively.X2 Disables monitoring of busy tones unless forced otherwise by country requirements;send only OK, CONNECT, RING, NO CARRIER, ERROR, NO DIAL TONE, NOANSWER, and CONNECT XXXX. If busy tone detection is enforced and busy tone isdetected, NO CARRIER will be reported instead of BUSY. If dial tone detection isenforced or selected and dial tone is not detected, NO DIAL TONE will be reportedinstead of NO CARRIER. The value 101b is written to S22 bits 6, 5, and 4, respectively.X3 Enables monitoring of busy tones; send only OK, CONNECT,
RING, NO CARRIER, ERROR, NO ANSWER, and CONNECTXXXX. Blind dialing is enabled/disabled by country parameters. If dial tone detection isenforced and dial tone is not detected, NO CARRIER will be reported. The value 110b iswritten to S22 bits 6, 5, and 4, respectively.X4 Enables monitoring of busy tones; send all messages. The value 111b is written to S22bits 6, 5, and 4, respectively. (Default)Yn Enables or Disables Long Space DisconnectY0/Y Disables Long Space Disconnect. (Default) Y1 Enables Long Space Disconnect.Zn ResetZn, which must be placed at the end of the command line, resets the active configuration of the modem tothe 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 1.2.2.a Commands Preceded by &&Cn Select DCD Options&C0/&C Maintains an ON status for the Data Carrier Detect (DCD).&C1 Uses the actual state of the carrier from the remote modem for DCD. (Default)&Dn DTR OptionDetermines actions taken by the modem in relation to the Data Terminal Ready (DTR) signal of the serialport.&D0 DTR is ignored. Allows operation with DTEs that do not provide DTR.&D1 DTR drop is interpreted by the modem as if the escape sequence has been entered. Themodem returns to the command state without disconnecting.&D2 DTR drop causes the modem to hang up. Auto answer is inhibited. (Default)&D3 DTR drop causes the modem to perform a soft reset as if the Z command werereceived. &F Fetch Factory Configuration&F0 Recall factory profile 0. (Default)&F1 Recall factory profile 1.&Gn Set Guard Tone&G0 - G1 Disable guard tone. (Default) &G2 Select 1800Hz-guard tone.
&Kn DTE/Modem Flow ControlDetermines how the modem controls the flow of data between the local DTE and the modem. When themodem terminal buffer is nearly full, the modem will either send an XOFF or drop CTS to stop the dataflow. When the buffer is nearly empty, the modem will either send an XON or raise CTS to start the dataflow.&K0 Disable DTE/DCE flow control.&K3 Enable RTS/CTS DTE/DCE flow control. (Default)&K4 Enables XON/XOFF DTE/DCE flow control.&K5 Enables transparent XON/XOFF DTE/DCE flow control.&K6 Enable RTS/CTS and XON/XOFF DTE/DCE flow control.&Mn Communication Mode(Same as &Q0)&Pn Select Pulse Dialing Make/Break Ratio&P0/&P Sets a 39/61 make/break ratio @ 10 pps - used in USA. (Default)&P1 Sets a 33/67 make/break ratio @ 10 pps.&P2 Sets a 39/61 make/break ratio @ 20 pps.&P3 Sets a 33/67 make/break ratio @ 20 pps.&Qn Asynchronous Mode SelectionThis command is an extension of the &M command and is used to control the connection modes permitted.It is used in conjunction with S36 and S48. &Q0 Select direct asynchronous operation. The value 000b is written to S27 bits 3, 1, and 0respectively. &Q5 The modem will try to negotiate an error-corrected link. The modem can be configuredusing S36 to determine whether a failure will result in the modem returning on-hook orwill result in fallback to an asynchronous connection. The value 101b is written to S27bits 3, 1, and 0 respectively. (Default) &Q6 Select asynchronous operation in normal mode (speed buffering). The value 110b iswritten to S27 bits 3, 1, and 0 respectively.&Sn DSR OptionDetermines whether DSR operates in accordance with the EIA-232-D specification or remains ON&S0 DSR is always ON. (Default)&S1 DSR will become active after answer tone has been detected and inactive after the carrier has been lost.
&Tn Testing and Diagnostics (See Chapter 4)Testing commands must be initiated in command mode (at the end of the command line) with asynchronousoperation in the Direct mode, selected (&Q0) at a speed of 1200 bps or faster. A telco connection must beestablished prior to loopback tests. If these conditions are not met, an ERROR result code is issued. If alocal analog loopback is initiated while the modem is connected, the modem disconnects beforeperformingthe test. A test remains active for the period of time specified in register S18. If S18 is zero, the test abortswhen the user issues the &T0 command.&T0/&T Terminates any test currently in progress.&T1 Initiates a local analog loopback in accordance with ITU-T V.54, L3; verifies the path between the local DTE and the local modem.&T8 Initiates a local analog loopback with self-test in accordance with ITU-T V.54, L2.&V View Configuration Profiles &V Displays the active configuration profile.&Wn Store the Current Configuration to Nonvolatile RAM&W0 Writes the current active configuration to profile 0 in nonvolatile RAM.&W1 Writes the current active configuration to profile 1 in nonvolatile RAM.&Yn Select the Default Profile&Y0/&Y Uses profile 0 on power-up. (Default) &Y1 Uses profile 1 on power-up.&Zn Store Telephone Numbers (n=0to3)&Zn Store one of four dial strings (including a telephone number) of up to 45 digits in nonvolatile RAM.For example: to store the telephone number 002852117 to RAM location 1, issue the following command:Command:AT&Z1=002852117<CR>2.2.b Commands Preceded by \\An Select Maximum MNP Block SizeThe modem will operate an MNP error corrected link using a maximum block size controlled by theparameter supplied.The parameter value, if valid, is written to S40 bits 6 and 7.\A0 64 characters. \A1 128 characters. (Default) \A2 192 characters. \A3 256 characters.
Result Codes: OK n=0 to 3. ERROR Otherwise.\Bn Transmit Break to RemoteIn non-error correction mode, the modem will transmit a break signal to the remote modem with a length inmultiples of 100ms according to parameter specified. If a number in excess of 9 is entered, 9 is used. Thecommand works in conjunction with the \K command.In error correction mode, the modem will signal a break through the active error correction protocol, givingno 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 remote modem, break is passed to the DTE as follows: Innon-error correction mode direct, the break length is passed; in non-error correction mode normal and inerror 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. SinceReliable Mode has its own method of flow control, the \Gn command is ignored when error correction isselected. However, DTE-to-modem flow control remains active during reliable link.\G0 Disable flow control. (Default) \G1 Enable flow control.\Kn Break ControlDetermines 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:\K0,2,4 Modem enters Command Mode (waiting for an AT command) without sending a BREAKto 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:
\K0,1 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: \K0,2,4 Modem sends a BREAK to the remote modem. \K1,3,5 Modem sends a BREAK to the remote modem.\Nn Operation Mode ControlSelects the operating mode to be used during connection\N0 Selects Normal (speed buffering) Mode. (Same as &Q6)\N1 Selects Direct (pass-through) Mode. (Same as &Q0)\N2 Selects Reliable Link Mode.\N3 Selects Auto-reliable Mode. Modem attempts to connect with error correction.\N4 Select LAPM error-correction mode.\N5 Select MNP error-correction mode.\Vn Single Line Connect Message EnableThe single line connect message format can be enabled or disabled by the \Vn command as follows:\V0 Connect messages are controlled by the command settings X, W, and S95.\V1 Connect messages are displayed in the single line format described below subject to thecommand settings V (Verbose) and Q (Quiet). In Non-Verbose mode (V0), single lineconnect messages are disabled and a single numeric result code is generated forCONNECT DTE.When single line connect messages are enabled, there are no CARRIER, PROTOCOL, or COMPRESSIONmessages apart from the fields described below.The single line connect message format is:CONNECT <DTE Speed></Modulation></Protocol></Compression></Line Speed>/<Voice andData>Where:<DTE Speed= DTE speed, e.g., 57600.Modulation= "V32" for V.32 or V.32bis modulations."V34" for V.34 modulations.Note: Modulation is omitted for all other modulations.Protocol= "NONE" for no protocol."ALT" for Microcom Network Protocol."LAPM" for LAP-M protocol.Compression= "CLASS5" for Microcom MNP5 compression."V42BIS" for V.42bis compression.Note: Compression is omitted if protocol is NONE.
Line Speed= Asymmetric rates are displayed as /rate:TX/rate:RX, e.g., /1200 TX/75 RX.Symmetric rates are displayed as a single DCE rate, e.g., 14400.Voice and Data= Blank for Data mode only."SVD" for AudioSpan analog simultaneous audio/voice and data."DSVD" for G.729A or DigiTalk digital simultaneous voice and data.2.2.c Commands Preceded by %%C Enable/Disable Data CompressionEnables or disable data compression negotiation. The modem can only perform data compression on anerror-corrected link. The parameter value, if valid, is written to S41 bits 0 and 1.%C0 Disables data compression. Resets S46 bit 1.%C1 Enables MNP 5 data compression negotiation. Resets S46 bit 1.%C2 Enables V.42 bis data compression. Sets S46 bit 1.%C3 Enables both V.42 bis and MNP 5 data compression. Sets S46 bit 1. (Default)Result Codes: OK n=0,1,2,or 3. ERROR Otherwise.%En Enable/Disable Line Quality Monitor and Auto-Retrain or Fallback/Fall ForwardControl 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 todial-up line only. The parameter value valid is written to S41 bits 2 and 6. If enable, the modem attempts toretrain for a maximum of 30 seconds. %E0 Disable line quality monitor and auto-retrain.%E1 Enable line quality monitor and auto-retrain.%E2 Enable line quality monitor and fallback/fall forward. (Default)%E3 Enable line quality monitor and auto-retrain, but hang-up immediately when EQM reacheshang-up threshold. (fast hang-up)%L Report Received Signal LevelReturns a value identifying the received signal level. The possible values are: 009 -9 dBm.010 -10 dBm. 011 -11 dBm. 043 -43 dBm.%Q Line Signal Quality
Reports the line signal quality (DAA dependent). Returns the higher order byte of the EQM value. Based onthe EQM value, retain or fallback/fall forward may be initiated if enabled by %E1 or %E2.%Un Select Law or A_Law Codec TypeThis command selects Law or A_Law codec type for V.90 and K56 flex modulation similar to the<x_law> parameter in the +MS command (see +MS command). This command overrides the <x_law>setting specified in a previous +MS command and the <x_law> parameter in a +MS command overrides aprevious %Un command. This command also stores the selected setting directly to NVRAM.%U0 Selects Law.%U1 Selects A_Law.Result codes:OK n = 0 or 1.ERROR Otherwise.2.2.d Commands Preceded by ++MS Select ModulationThis extended-format command selects the modulation and, optionally, enables or disables automode,specifies the lowest and highest connection rates, selects u-Low or A-Low codec type, and enables ordisables robbed bit signaling generation (server modem) or detection (client modem) using one to fivesubparameters. The command format is:+MS=<mod> [,[<automode>][,[<min_rate>][,[<max_rate>][,[<x_law>][,[<rb_signaling>]]]]]]<CR>Notes:1. For 14400 bps and lower speeds, the Nn command and S37 register can alternatively be used, inwhich case the +MS subparameters will modified to reflect the Nn and S37=x settings. Use of the Nnand S37=x commands is not recommended but is provided for compatibility with existingcommunication software. (S37 is not updated by the +MS command.)2. Subparameters not entered (enter a comma only or <CR> to skip the last subparameter) remain attheir current values.Reporting Selected OptionsThe modem can send a string of onformation to the DTE consisting of selected options using the followingcommand:+MS?The response is:+MS: <mod>,<automode>,<min_rate>,<max_rate>,<x_law>,<rb_signaling>For example,K56flex: +MS: 56,1,300,56000,0,0V.90: +MS: 12,1,300,56000,0,0,33600 (RC56 default values)Reporting Supported Options
The modem can send a string of information to the DTE consisting of supported options using the followingcommand:+MS=?The response is:+MS: (list of supported <mod> values), (list of supported <automode> values), (list of supported<min_rate> values), (list of supported <max_rate> values), (list of supported <x_law> values), (listof supported <rb_signaling> values)For example,+MS: (0,1,2,3,9,10,11,12,56,64,69), (0,1), (300-33600), (300-56000), (0,1), (0,1)Subparameter Definitions1. <mod>= A decimal number which specifies the preferred modulation (automode enabled) ormodulation (automode enabled) to use in originating or answering a connection. The options are:<mod> Modulation Possible Rates (bps)1Notes0 V.21 3001 V.22 12002 V.22 bis 2400 or 12003 V.23 1200 See Note 29 V.32 9600 or 480010 V.32 bis 14400, 12000, 9600, 7200 or 480011 V.34 33600, 31200, 28800,26400, 24000, 21600, 19200, 16800,14400, 12000, 9600, 7200, 4800, or 240012 V.90 56000, 54677, 53333, 52000, 50669,49333, 48000, 46667, 45333, 42667,41333, 40000, 38667, 37333, 36000,34667, 33333, 32000, 30667, 29333,2800056 K56flex 56000, 54000, 52000, 50000, 48000,46000, 44000, 42000, 40000, 38000,36000, 34000, 3200064 Bell 103 30069 Bell 212 1200Notes: 1. See optional <automode>, <min_rate>, and <max_rate> subparameters.2. For V.23, originating modes transmit at 75 bps and receive at 1200 bps; answering modes transmit at1200 bps and receive at 75 bps. The rate is always specified as 1200 bps. The modem may also automatically switch to another modulation (automode), subject to the followingconstraints:a. The modem may not be able to automatically switch from the current modulation (specified by<mod>) to some other modulation. For example there is no standard way to automode from Bell103 to V.23.b. The DTE may disable automode operation (see <automode> below).c. The DTE may constrain the range of modulations available by specifying the lowest and highestrates (see <min_rate> and <max_rate> below).2. <automode> is an optional numeric value, which enables or disables automatic modulationnegotiation using V.8 bis/V.8 or V.32 bis Annex A. The options are:<automode> Option Selected Notes
0 Automode disabled1 Automode enabled using V.8 bis/V.8 or V.32 defaultAnnex A The default value is 1, which enablesautomode. Note, however, there are modulations for whichthere is no automode negotiation, e.g., Bell 212 (<mod>=69).For <automode> = 0 (automode disabled, i.e., fixed modulation):a. If <max_rate> is within the rates supported by the selected modulation, the selected rated is thatspecified by <max_rate>. For example,+MS=10, 0, 1200, 4800 selects V.32 bis 4800 bps fixed rate.b. If <max_rate> is greater than the highest speed supported by the modulation specified by <mod>,the starting rate is the highest rate supported by the selected modulation. For example,+MS=10, 0, 2400, 14400 selects V.32 bis 14400, 12000, 9600, 7200, or 4800 bps.c. To emulate issuance of the N0S37=x command sequence to select fixed mode operation, specifythe <max_rate>and<min_rate> both to be the (same) requested speed, and <mod> to be themodulation for that speed. For example,+MS=11, 0, 16800, 16800 selects V.34 16800 bps fixed mode (no comparable S37 command).+MS=10, 0, 12000, 12000 selects V.32 bis 12000 bps fixed mode (same as N0S37=10).For <automode> = 1 (automode enabled, i.e., automatically selected speed and modulation):The modem connects at the highest possible rate in accordance with V.8 bis/V.8, or V.32 bis AnnexA if V.8 bis/V.8 is not supported by the remote modem.a. If <max_rate> is greater than the highest rate supported by the modulation specified by <mod>,the modem automodes down from the highest rate of the selected modulation. For example,+MS=10, 1, 1200, 24000 selects automoding down from V.32 bis 14400 bps.b. To emulate issuance of the N1S37=x sequence command, specify the modulation and the rate tostart automoding down from using <mod> and <max_rate>, respectively. Set <min_rate> to 300to allow automoding all the way to V.21 300 bps. For example:+MS=11, 1, 300, 16800 selects automodestarting at V.34 16800 bps (no comparable S37 command).+MS=9, 1, 300, 12000 selects automode starting at V.32 bis 12000 bps same as N1S37=10).3. <min_rate> is an optional number specifies the lowest rate at which the modem may establish aconnection. The value is decimal coded, in units of bps, e.g., 2400 specifies the lowest rate to be2400 bps. The default is 300 for 300 bps.4. <max_rate> is an optional number specifies the highest rate at which the modem may establish aconnection. The value is decimal coded, in units of bps, e.g., 14400 specifies the highest rate tobe 14400 bps. The default is 28800 for 28800 bps.5. <x_law> is an optional number, which specifies the codec type. The options are:0=µ-Law1=A-LawNote that ATZ will reset the <x_law> selection to 0 (µ-law).
* Also note that the <x_law> parameter in a +MS command overrides a previous %Un commandand a %Un command overrides the <x_law> setting specified in a previous +MS command.6. <rb_signaling> is an optional number, which enables or disables robbed bit signaling generationin a server modem or enables or disables robbed bit signaling detection in a client modem. Theoptions are:0=Robbed bit signaling generation (server modem) or detection (client modem) disabled. (Default)1=Robbed bit signaling generation (server modem) or detection (client modem) enabled.Note that ATZ will reset the <rb_signaling> selection to 0. (Default)Result Codes:OK Valid subparameter stringERROR Otherwise.2.2.e Commands Preceded by **** Download to Flash Memory The linear flash memory downloader in the modem firmware allows flash memory connected to the modemexternal memory bus to be upgraded with revised modem firmware. This process transfers (uploads) theupgraded modem firmware (data) from the host computer to the modem which transfers (downloads) thedata to the flash memory device. Note that this command apply only to the modem with flash memory.Programming the flash memory device is a two-step process.1. When the AT** command is issued, the modem firmware boot loader is invoked and the user will firstload a flash load module (FLM) into the modem's RAM. The FLM contains the programming algorithmfor the flash memory device being programmed and any messages that may be sent during the loadprocess.2. The user will then load the new modem firmware, which the FLM will then program into the flashmemory device.Procedure:1. Install in the modem a flash memory programmed with the modem firmware; ensure that the flashmemory device is programmed with the sector secure mode set to UNSECURE (AMD only), otherwisethe device connot be re-programmed in the modem.2. Put the FLM file and the new modem firmware file (e.g., V1400DS.S37) in an appropriate directory onthe computer's hard disk.3. Configure the communications application program for a DTE rate of between 9600 bps and 57600 bps(57600 bps is faster) and RTS/CTS flow control. A load at 57600 bps will take approximately 2minutes; a load at 19200 bps will take approximately 6 minutes.4. Check the modem for response by typing AT.5. Initiate the download process using the AT**n command, where:AT**/AT**0 download speed is the last sensed speed (recommended command).AT**1 Download speed is 38.4k bps.
AT**2 Download speed is 57.6k bps.The "Download initiated" message appears upon issuing the AT**n command.6. Perform an ASCII upload of the FLM file (e.g., AMDE.S37) from the host computer to the modemRAM using an industry standard communications software of an equivalent process (ensure that all ASIItransmit or pacing is turned off).To abort the load at this point, wait for the FLM download process to time-out, send a bad S37 record,or reset (POR) the modem. If the load process times-out, the modem must be reset (ATZ) before theFLM can be loaded again.7. After the FLM has been loaded, perform an ASCII upload of the new modem firmwarehex file (e.g.,RC288ACi.S37) from the host computer to the modem RAM using industry standard communicationssoftware or an equivalent process. There will be a 3-second pause after the first record of theRC288AXX.S37 file is sent, which is the FLASH erase cycle. There is no turning back at this point.If the flash download fails (because of a bad .S37 record for example) or the upload is aborted, as longas the modem is not turned off or reset, it will remain in the flash load cycle and the upload can be re-attempted at step 7.A "Wrong Device" message is displayed if an incorrect FLM is used. In this case, restart at step 5 andupload the correct FLM file.A "Wrong Hex file or flow control" message is displayed if an incompatible hex file format is used(non-Motorola S3 format) or if the DTE ignores flow controls (the flash download uses both Xon/Xoffand RCS/CTS flow control). If the wrong format was used, reinitiate the upload at step 7 using a correctfirmware hex file.8. A "Device successfully programmed" message is displayed by the FLM at the completion of asuccessful download and the modem will do a cold start.2.3 Dial ModifiersThis 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 beforedialing the next number in the dial string. @ is usually used to access a secure computer system thatprovides a silent answer as permission for further entrance., Pause",", 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 for0.5 seconds and then go off-hook again before processing the rest of the dial string. This modifier allowsaccess to PBX features like call transferring.
; Return to Command State after Dialing";", which must be placed at the end of the dial string, returns to the command state after dialing the numberplaced ahead of it. A long telephone number would overflow the 40-character command buffer if placed allin one command line, so it must be broken into two or more command lines. Each part includes part of thenumber, and all but the last command line end with the ";" followed by a carriage return.^ Tone ControlToggles calling tone enable/disable: applicable to current dial attempt only.JPerform MNPPerform MNP 10 link negotiation at 1200 bps (for this call only).K Enable Power LevelEnable power level adjustment during MNP 10 link negotiation (for this call only).L Re-dial Last NumberThe modem will re-dial the last valid telephone number. The L must be immediately after the D with all thefollowing characters ignored.P Pulse DialingP, placed ahead of a number, tells the modem to dial a number using pulse dialing.S Dial a Stored NumberS is used to dial one of four numbers stored in nonvolatile memory. For example, instead of entering a dialstring, you can use this command: Command: ATDTS=1<CR>T Touchtone DialingT, placed ahead of a number, tells the modem to dial a number using touchtone dialing.W Wait for DialtoneW, placed after a number, tells the modem to wait up to 30 seconds to detect a one-second continuousdialtone before dialing the next number. W is most often used in a PBX system to wait for the dialtone of anoutside telephone line.
2.4 Commands Not Preceded by ATTwo commands, A/ and +++, are neither preceded by the attention code AT nor followed by a carriagereturn.A/ Repeat CommandA/ repeats the execution of the last command line stored in the command buffer. If the last command line isinvalid, 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+++ followed by AT <CR> allows the modem to escape from the data mode to the on-line command state(command state without breaking the established connection.)To escape, stop transmitting data, wait at least one escape guard time (the default time is one second), andthen enter three consecutive escape characters (the default character is +) followed by AT <CR>.The modem will return to the command state and send the OK result code to the screen. Note that theescape command is the only command that can be recognized by the modem in the one-line state; it cannotbe recognized in the command state.2.5 Result CodesThe modem sends a response to the user via the screen after a command is issued. As shown in the figurebelow, there are two forms for each result code: Modem Response code and digit code. Modem Response Digit Description OK 0 Command executed without errorsCONNECT 1 Connect to another modemRING 2 Detect an incoming ringNO CARRIER 3 Carrier lost or never detectedERROR 4 Invalid command or invalid characterCONNECT 1200 5 Connection established at 1200 bpsNO DIALTONE 6 Dial tone not detected within timeoutBUSY 7 Detected a busy tone after dialingNO ANSWER 8 No ringback or quiet answer was detected by the modemCONNECT 600 9 Connection established at 600 bpsCONNECT 2400 10 Connection established at 2400 bpsCONNECT 4800 11 Connection established at 4800 bpsCONNECT 9600 12 Connection established at 9600 bpsCONNECT 7200 13 Connection established at 7200 bpsCONNECT 12000 14 Connection established at 12000 bpsCONNECT 14400 15 Connection established at 14400 bpsCONNECT 19200 16 Connection established at 19200 bps CONNECT 38400 17 Connection established at 38400 bpsCONNECT 57600 18 Connection established at 57600 bpsCONNECT 115200 19 Connection established at 115200 bpsCONNECT 230400 20 Connection established at 230400 bpsCONNECT 1200RX/75TX 22 V.23 connection established:transmit at 75 bps, receive at 1200 bpsCONNECT 75RX/1200TX 23 V.23 connection:transmit at 1200 bps, receive at 75 bpsDELAYED 24 Call fails to connect and number dialed is considered 'delayed' due to country blacklisting requirementsBLACKLISTED 32 Call fails to connect and the number dialed is considered 'blacklisted'FAX 33 A fax modem connection is established in a facsimile modeDATA 35 A data modem connection is established in a facsimile modeCARRIER 300 40 Carrier detectedCARRIER 1200TX/75RX V.2344 Carrier detectedCARRIER 75RX/1200TX V.2345 Carrier detected
CARRIER 1200 46 Carrier detectedCARRIER 2400 47 Carrier detectedCARRIER 4800 48 When the 4800 bps data rate in V.32 bis or V.32 mode has been detected on the lineCARRIER 7200 49 When the 7200 bps data rate in V.32 bis mode has been detected on the lineCARRIER 9600 50 When the 9600 bps data rate in V.32 bis or V.32 mode has been detected on the lineCARRIER 12000 51 When the 12000 bps data rate in V.32 bis mode has been detected on the lineCARRIER 14400 52 When the 14400 bps data rate in V.32 bis mode has been detected on the lineCARRIER 16800 53 When the 16800 bps data rate in V.34 mode has been detected on the lineCARRIER 19200 54 When the 19200 bps data rate in V.34 mode has been detected on the lineCARRIER 21600 55 When the 21600 bps data rate in V.34 mode has been detected on the lineCARRIER 24000 56 When the 24000 bps data rate in V.34 mode has been detected on the lineCARRIER 26400 57 When the 26400 bps data rate in V.34 mode has been detected on the lineCARRIER 28800 58 When the 28800 bps data rate in V.34 mode has been detected on the lineCONNECT 16800 59 Connection established at 16800 bpsCONNECT 21600 61 Connection established at 21600 bpsCONNECT 24000 62 Connection established at 24000 bpsCONNECT 26400 63 Connection established at 26400 bpsCONNECT 28800 64 Connection established at 28800 bpsCOMPRESSION CLASS 5 66 MNP class 5 compression in useCOMPRESSION V.42BIS 67 V.42 bis compression in useCOMPRESSION NONE 69 No compression is being usedPROTOCOL:NONE 76 Normal mode selectedPROTOCOL:LAPM 77 LAPM mode selectedCARRIER 31200 78 When the 31200 bps data rate in V.34 mode has been detected on the lineCARRIER 33600 79 When the 33600 bps data rate in V.34 mode has been detected on the linePROTOCOL:ALT 80PROTOCOL:ALT-CELLULAR 81CONNECT 33600 84 Connection established at 33600 bpsCONNECT 31200 91 Connection established at 31200 bpsCARRIER 32000 150 Connection established at 32000 bpsCARRIER 34000 151 Connection established at 34000 bpsCARRIER 36000 152 Connection established at 36000 bpsCARRIER 38000 153 Connection established at 38000 bpsCARRIER 40000 154 Connection established at 40000 bpsCARRIER 42000 155 Connection established at 42000 bpsCARRIER 44000 156 Connection established at 44000 bpsCARRIER 46000 157 Connection established at 46000 bpsCARRIER 48000 158 Connection established at 48000 bpsCARRIER 50000 159 Connection established at 50000 bpsCARRIER 52000 160 Connection established at 52000 bpsCARRIER 54000 161 Connection established at 54000 bpsCARRIER 56000 162 Connection established at 56000 bpsCONNECT 32000 165 Connection established at 32000 bpsCONNECT 34000 166 Connection established at 34000 bpsCONNECT 36000 167 Connection established at 36000 bpsCONNECT 38000 168 Connection established at 38000 bpsCONNECT 40000 169 Connection established at 40000 bpsCONNECT 42000 170 Connection established at 42000 bpsCONNECT 44000 171 Connection established at 44000 bpsCONNECT 46000 172 Connection established at 46000 bpsCONNECT 48000 173 Connection established at 48000 bpsCONNECT 50000 174 Connection established at 50000 bpsCONNECT 52000 175 Connection established at 52000 bpsCONNECT 54000 176 Connection established at 54000 bpsCONNECT 56000 177 Connection established at 56000 bps+FCERROR +F4** V.90 Result CodesSpeed Carrier Connect28000 180 18029333 181 18130667 182 18232000 150 16533333 183 183
34667 184 18436000 152 16737333 185 18538667 186 18640000 154 16941333 187 18742337 188 17145333 189 18946667 190 19048000 158 17349333 191 19150667 192 19252000 160 17553333 193 19354667 194 19456000 162 177 3 - S REGISTERS REFERENCEYour modem has status registers. These registers are memory locations inside your modem which controlyour modem's operation. You usually do not have to worry about setting any register because the defaultvalues work for most applications.The S registers are summarized in Fig. 3-1, along with their default values. Registers denoted with an " * "may be stored in one of the two user profiles by entering the &Wn command. One of these profiles may beloaded 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 bythe Zn command. In addition, the designated default profile is subsequently loaded, and may change someof the factory default values. The designated default profile can be changed by entering the &Yn command,where 'n' is one of the two possible user profiles. The factory defaults can be loaded at any time by enteringthe &F command.3.1 Register SummaryThe following chart summarizes your modem's registers: DefaultReg.# Range Unit Dec Hex DescriptionS0 0 - 255 rings 0 00h Number of rings before auto-answer.S1 0 - 255 rings 0 00h Ring count.S2 0 - 255 ASCII 43 2Bh Escape character code.S3 0 - 127 ASCII 13 0Dh Command terminator (<CR>character).S4 0 - 127 ASCII 10 0Ah Line feed character.S5 0 - 255 ASCII 8 08h Backspace character.S6 2 - 255 seconds 2 02h Wait time for blind dialing.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.S10 1 - 255 1/10 sec. 14* 0Eh Lost carrier to hang-up delay.S11 50 - 255 1/1000 sec. 95 5Fh DTMF Tone Duration.S12 0 - 255 1/50 sec. 50* 32h Escape code timing.S14 [Bit Mapped Options]* 138 8AhS18 0 - 255 seconds 0* 00h Test mode timer.S21 [Bit Mapped Options] 4* 04h V.24/General bit-mapped options.S22 [Bit Mapped Options] 117* 75h Speaker/Results Bit-mapped options.S23 [Bit Mapped Options] 54 36hS24 0 - 255 seconds 0 00h Sleep Inactivity Timer.S25 0 - 255 seconds 5* 05h Dalay to DTR.S26 0 - 255 1/100 sec 1* 01h RTS to CTS Delay Interval.S28 [Bit Mapped Options] 0* 00hS29 0 - 255 10 ms 70* 46h Flash Dial Modifier Time.S30 0 - 255 10 s 0* 00h Inactivity Disconnect Timer.
S31 [Bit Mapped Options] 194* C2hS32 0 - 255 ASCII 17 11h XON Character.S33 0 - 255 ASCII 19 13h XOFF Character.S36 7* 07h LAPM Failure Control.S37 0* 00h Desired Line Connection Speed.S38 0 - 255 seconds 20* 14h Delay before Forced-Disconnect.S39 3 03h Flow Control.S40 [Bit Mapped Options] 104 68h General Bit Mapped Options.S41 3 03h Bit-Mapped Options.S46 138* 8Ah Protocol Selection.S48 7* 07h V.42 Negotiation Action.S82 128* 80h Break Handling Option.S86 0 - 255 Call Failure Reason Code.S91 0 - 15 dBm 10 0Ah PSTN Transmit Attenuation Level.S92 0 - 15 dBm 10 0Ah Fax Transmit Attenuation Level.S95 [Bit mapped] 0* 00h Extended result codes. Fig. 3-1 S-Register Summary3.2 Glossary of S RegistersS0 Number of Rings Before Auto AnswerS0 determines the number of rings that must be received before the modem automatically answers anincoming 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 issuedmanually to answer the incoming call. Range: 0 - 255 ringsS1 Ring CountS1 automatically increments its value by one each time the modem receives a ring while in the commandstate. S1 is reset to zero if no ring is detected within 8 seconds. Range: 0 - 255 ringsS2 ASCII Value of Escape CharacterS2 stores the ASCII value of the escape character. Setting register S2 to a value greater than 127 disablesthe escape command and you cannot return to the command state. With escape disabled, in the on-line statethe modem cannot hang up until the power is turned off or the remote modem hangs up.Range: 0 - 255, ASCII decimal.S3 ASCII Value of Carriage ReturnS3 stores the ASCII value of the carriage return character. (Pertains to asynchronous operation only.) Range: 0 - 127, ASCII decimal.S4 ASCII Value of Line Feed Character
S4 stores the ASCII value of the line feed character, if your computer does not recognize the default as aline feed, change the value. A value greater than 127 disables the line feed. When disabled, the line feedcharacter that precedes or follows a result code is canceled.(Pertains to asynchronous operation only.) Range: 0 - 127, ASCII decimal.S5 ASCII Value of Backspace CharacterS5 stores the ASCII value of the backspace character. The backspace is used to edit a command line. If yourcomputer does not recognize the default as a backspace, change the value. (Pertains to asynchronousoperation only.)Set S5 to any value from 0 to 31 or 127. Do not set it to any value from 32 through 126 because thesevalues correspond to printable ASCII characters. A value greater than 127 disable the backspace and makesit impossible to edit a command line. Range: 0 - 32, ASCII decimal.S6 Wait Time before Blind DialingS6 controls how long the modem waits after it goes off-hook before it dials the first digit of the telephonenumber. The modem always pauses for at least 2 seconds, even if S6 is set to less than two seconds. Range: 2 - 255 seconds.S7 Wait for Carrier after DialS7 controls how long the modem waits for a carrier signal from a remote modem after originating a call orfrom 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 numberfollowed by the W dial modifier. If the modem detects a one-second continuous dialtone within thespecified wait time, it proceeds to dial. Range: 1 - 255 seconds.S8 Pause Time for CommaS8 controls how long the modem pauses when a comma ", " is encountered in a dial string while executinga dial command. Range: 0 - 255 seconds.S9 Carrier Detect Response TimeS9 determines how long a carrier signal must be present for the modem to confirm it. The longer theresponse time, the easier it is for the modem to correctly recognize a carrier without mistaking other signalsor transient noise on the line as a carrier.
Range: 1 - 255 tenths of a second.S10 Delay between Loss of Carrier and Hang-UpS10 determines the delay time between the loss of a carrier from the remote modem and hang-up. Thisallows for a temporary loss of carrier without causing the local modem to disconnect. When S10 is set to255, 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 itrecognizes the carrier.Range: 1 - 255 tenths of a second.S11 DTMF (Touch-tone) Tone DurationS11 determines the duration and spacing of tones for Dual Tone Multifrequency (DTMF) dialing. Thisvalue has no effect on pulse dialing.Range: 50 - 255 milliseconds.S12 Escape Guard TimeS12 determines the escape guard time. The escape guard time is the minimum waiting time required beforeand after entering the escape code (three consecutive escape characters) in the on-line state. It is also themaximum waiting time allowed between any two consecutive escape characters. If the waiting time beforeor after the escape code is shorter than the guard time, or if the waiting time between consecutive escapecharacters is longer than the guard time, then the modem does not recognize the escape command and stayson-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.S14 Bit Mapped Options Bit Value Description bit 1 (E) 0 Disabled. 1 Enabled. bit 2 (Q) 0 Disabled. 1 Enabled. bit 3 (V) 0 Numeric. 1 Verbose. bit 4 Reserved bit 5 (P or T) 0 T (Tone dial). 1 P (Pulse dial). bit 6 Reserved bit 7 0 Answer mode. 1 Originate mode.S18 Test Timer
The test timer determines how long tests are performed. The modem automatically ends the test when thetest time is expired. The default value of 000 disables the test timer. When the timer is thus disabled, alltests must be ended with the &T0 command.Range: 0 - 255 seconds.S21 V.24/General Bit Mapped Options Bit Value Description bit 0 0 &J0. 1 &J1. bit 2 0 &R0. 1 &R1. bit 3,4 00 &D0. 01 &D1. 10 &D2. 11 &D3. bit 5 0 &C0. 1 &C1. bit 6 0 &S0. 1 &S1.bit 7 0 Y0. 1 Y1.S22 SPEAKER/Results Bit Mapped OptionsBit Value Description bit 0,1 00 Select L0. 01 Select L1. 10 Select L2. 11 Select L3. bit 2,3 00 Select M0. 01 Select M1. 10 Select M2. 11 Select M3. bit 4,5,6 000 Select X0. 001 Reserved. 010 Reserved. 011 Reserved. 100 Select X1. 101 Select X2. 110 Select X3. 111 Select X4 bit 7 [RESERVED]S23 Bit Mapped OptionsBit Value Description bit 0 0 &T5. 1 &T4. (default) bit 1,2,3 000 Communications rate = 300 bps. 001 Communications rate = 600 bps. 010 Communications rate = 1200 bps. 011 Communications rate = 2400 bps. 100 Communications rate = 4800 bps. 101 Communications rate = 9600 bps.110 Communications rate = 19200 bps. 111 Communications rate = 38400 bps or higher. bit 4,5 00 Even parity selected. 01 Not used. 10 Odd.
11 None. bit 6,7 00 &G0. 01 &G1. 10 1800Hz. (&G2)S24 Sleep Inactivity TimerSet the length of time, in units of 10 seconds, that the modem will operate in normal mode with no detectedtelephone line of DTE line activity before entering low-power sleep mode. Range: 0 - 255 (seconds)S25 Delay to DTRS25 serves two purposes. When the modem is operating in synchronous mode 1, the value assigned to S25specifies the length of time the modem waits after a connection has been made before examining DTR. Thisallows the modem to ignore an ON-to-OFF transition of DTR, giving the user time to disconnect the modemfrom the asynchronous terminal and attach it to a synchronous terminal, without forcing the modem back tothe 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 1 and 4, the value is read in 1/100seconds. In any mode, a change in DTR (ON or OFF) that persists for a period shorter than the value held inS25 is ignored by the modem while it is in data mode.Range: 0 - 255 (1 second for synchronous mode 1;0.01 second otherwise)S26 RTS to CTS Delay IntervalPertains to synchronous operation only. When CTS tracks RTS (&R0) and the modem detects an ON-to-OFF transition on RTS, this register sets the time delay before the modem turns CTS to ON.Range: 0 - 255 hundredths of a secondS28 Bit Mapped Option Statusbit 0, 1 Reserved.bit 2 Reserved. bit 3, 4 Pulse dialing (&Pn). 0 = 39%-61% make/break ratio at 10 pulse per second (&P0). 1 = 33%-67% make/break ratio at 10 pulse per second (&P1). 2 = 39%-61% make/break ratio at 20 pulse per second (&P2). 3 = 33%-67% make/break ratio at 20 pulse per second (&P3). bit 5 Reserved. bit 6-7 MNP Link Negotiation Speed (*Hn). 0 = Link negotiation at highest speed (*H0). 1 = Link negotiation at highest speed (*H1). 2 = Link negotiation at highest speed (*H2).S29 Flash Dial Modifier Time Range: 0 - 255 10ms intervals
S30 Inactivity Disconnect TimerThis register determines the length of time, in seconds, the modem waits before disconnecting when no datais sent or received. This only operates in &Q5 and &Q6 modes, a value of 0 in this register disables thetimer. Range: 0 - 255 tenths of a secondS31 Bit Mapped OptionsBit Value Description bit 1 Controls auto line speed detection (Nn). 0 Disable (N0). 1 Enable (N1). bit 2, 3 Controls error correction progress messages (Wn). 00 DTE speed only (W0). 01 Full reporting (W1).10 DCE speed only (W2).S32 XON Character Range: 0 - 255, ASCII decimalS33 XOFF Character Range: 0 - 255, ASCII decimalS36 LAPM Failure Control This register is read when the S48 register contains the value 128 or if an attemptederror-correction link fails. These fallback options are initiated immediately uponconnection if S48 = 128 Bit Value Action bit 0,1,2 000 Modem disconnect. 001 Modem stays on-line and Direct mode connections established. 010 Reserved. 011 Modem stays on-line and a Normal mode connection is established. 100 An MNP connection is attempted and if it fails, the modemdisconnects. 101 An MNP connection is attempted and if it fails, a directmode connection is established. 110 Reserved. 111 An MNP connection is attempted and if it fails, the normalmode connection is established.S37 Desired Line Connection Speed bit 0-4 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 auto mode connection. 1-3 = Attempt to connect at 300 bps. 4 = Reserved. 5 = Attempt to connect at V.22 1200 bps.
6 = Attempt to connect at V.22bis 2400 bps. 7 = Attempt to connect at V.23. 8 = Attempt to connect at V.32 bis/V.32 4800 bps. 9 = Attempt to connect at V.32 bis/V.32 9600 bps. 10 = Attempt to connect at V.32 bis 12000 bps. 11 = Attempt to connect at V.32 bis 14400 bps. 12 = Attempt to connect at V.32 bis 7200 bps. bit 5-7 Reserved.S38 Delay Before Forced-DisconnectThis register controls how long the modem waits, after receiving the ATH command or loss of DTR, beforeit disconnects from the telephone line. When connected in an error-corrected mode, you can use this registerto 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 toacknowledge all data before it disconnects. If you set S38 to 255, the modem waits indefinitely for theremote modem to acknowledge all data. Range: 0 - 255 secondsS39 Flow Control Bit Value Connect speed bit 0-2 000 No flow control. 011 RTS/CTS &K3. 100 XON/XOFF &K4. 101 Transparent XON &K5. 110 Both Method &K6. bit 3-7 Reserved.S40 General Bit Mapped Options Bit Value Description bit 0-1 MNP Extended Services (-Kn). 0 Disable extended services (-K0). (Default for non MNP 10 models). 1 Enable extended services (-K1). (Default for MNP 10 models). 2 Enable extended services (-K2). bit 2 Power level Adjustment for Cellular Use ( )Mn). 0 Auto - adjustment ( )M0). 1 Force adjustment ( )M1).bit 3-5 Break handling (\Kn).0 \K0.1 \K1.2 \K2.3 \K3.4 \K4.5\K5.bit 6-7 MNP block size (\An).0 64 chars (\A0).1 128 chars (\A1).2 192 chars (\A2).3 256 chars (\A3).S41 Bit-Mapped Options Bit Value Description
bit 0,1 Compress selection %Cn. 0 0 Disable %C0. 0 1 MNP 5 %C1. 1 0 V.42 bis %C2. 1 1 MNP 5 and V.42 bis (%C3) bit 6,2 Auto retrain %En. 0 0 Retrain disable %E0. 0 1 Retrain enable %E1. 1 0 Fallback/fall forward enable (%E2). bit 3 Modem-to-modem flow control \G. 0 Disable \G. 1 Enable \G1. bit 4 Block mode control \Ln. 0 Store mode \L0. 1 Block mode \L1. bit 5 Reserved. bit 7 Enable fallback to V.22bis/V.22 (-Qn). 0 Disable (-Q0). 1 Enable (-Q1).S46 Protocol SelectionThis register controls whether the modem tries to use data compression when the modem establishes anerror corrected link. The default is for the modem to use data compression (138). Value Description 136 Execute error correction protocol with no compression. 138 Execute error correction protocol with compression.S48 V.42 Negotiation Action Value Description 0 Disable negotiation: bypass the detection and negotiation phases. 7 Enable negotiation. 128 Disable negotiation: bypass the detection and negotiation phases.S82 Break Handling OptionS82 is for compatibility purposes only, changing this register will not any affect. S86 Call Failure Reason CodeWhen the modem issues a NO CARRIER result code, a value is written to this S-Register to help determinethe reason for the failed connection. S86 records the first event that contributes to a NO CARRIERmessage. The cause codes are: Range: 0, 4, 5, 9, 12, 13, or 14S86 = 0 Normal disconnect, no error occurred. S86 = 4 Loss of carrier. S86 = 5 V.42 negotiation failed to detect an error-correction modem at the other end. S86 = 9 The modems could not find a common protocol. S86 = 12 Normal disconnect initiated by the remote modem. S86 = 13 Remote modem does not respond after 10 retransmission of the same message. S86 = 14 Protocol violation.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 0to -15 dBm.Range: 0 to 15 dBm (Corresponding to 0 to -15 dBm transmit level).S92 Fax Transmit Attenuation LevelSets the transmit attenuation level from 0 to 15 dBm for the fax mode resulting in a transmit level from 0 to-15 dBm. Range: 0 to 15 dBm (Corresponding to 0 to -15 dBm transmit level).S95 Extended Result CodesThis register can override some of the W command options. Set the appropriate bit to 1 to enable thecorresponding result code, regardless of the W command setting Set the bit to 0 to disable the result code.Bit Description 0 CONNECT indicates DCE speed. 1 Append /ARQ to the CONNECT result code if the protocol is other than NONE. 2 CARRIER result code. 3 PROTOCOL: result code.4 Reserved. 5 COMPRESSION: result code. 6 Reserved. 7 Reserved.4 - TESTINGThe modem provides five testing features to identify fault location when transmission quality is not good:local digital loopback, local analog loop back, local analog loopback with self-test, remote digital loopback,and remote digital loopback with self-test. These tests are initiated with the &Tn command described inChapter 2.4.1 Local Analog LoopbackThe local analog loopback test checks the integrity of the local computer or terminal and the local modem.During the test, the local modem internally loops data sent from the local computer or terminal back to thesame computer or terminal as shown in Figure 4-1. During the test, data is not transmitted to the remotemodem.If characters are looped correctly during this test, both the modem and the local computer or terminal arefunctioning correctly. If incorrect characters appear on the screen, either the local computer or terminal orthe local modem is in error.To perform a local analog loopback, put the local modem in the command state. If it is on-line, issue theescape command + + +, to return to the command state.
Example 1 - test timer disabledCommand: AT&Q0<CR> ATS18=0&TI <CR>Result: CONNECT 56000Test message: THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG 1234567890Escape: + + + (return to the on-line command state)Result code: OKCommand: AT&T0 <CR> (end the test)Result code: OKHere, the test timer is disabled and the modem sets up an internal analog loop as shown in Figure 4-1. Whenthe loopback is established, the modem goes on-line and the test message (any character you type) is loopedback on the screen for verification. Finally, +++ returns the modem to the command state and &T0 endsthe test and breaks the internal analog loop.The following command sequence is the same as the previous one except that the test timer is set to 60seconds. At the end of the test time, the timer expires, the test ends, and the test result is reported.Example 2 - test timer enabledCommand: AT&Q0<CR> ATS18=60&T1<CR>Result: CONNECT 56000Test message: THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG 1234567890Escape: +++Result code: OK
4.2 Local Analog Loopback with Self-TestThe local analog loopback with self-test checks the integrity of the local modem. In this test, an internallygenerated data pattern of alternate binary ones and zeros (reversals) at the selected bit rate is looped throughthe internal analog loop inside the local modem to an internal error counter as shown in Figure 4-2. An errorcount of 255 indicates that 255 or more errors were detected.Example-the test timer is disabled and 12 errors are found during the testCommand: AT&Q0<CR> ATS18=0&T8<CR> Result: OK Command: AT&T0<CR> (ends the test)Test result: 000Result code: OK5 - THROUBLESHOOTING GUIDEThis chapter describes common problems in the installation, configuration and regular usage of yourFax/Data Modem. To test the Fax/Data Modem, a communication software package is needed and thepackage must include a mode that allows you to operate your Fax/Data Modem by directly issuing internalcommands 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 add-on card modems, make sure that the COM port address you haveset your modem to corresponds to the appropriate selection in the communications software whichyou 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 ofthese responses. If there is no response after issuing the ATZ<CR>, continue to the next step.
3. Check if there are any other interface cards in your computer that use the same COM port addressas your modem. If so, you must set your modem to another COM port address. (Keep in mind that onmost systems, only two COM ports are available. One of them must be used as either 1 or 3, whilethe other must be used as 2 or 4.) For example, if a mouse is set to COM 1, your modem should beset to COM2 or COM4. Continue to the next step if the COM port address is OK.4. Issue the command: AT&F&W <CR>, if a "0" or "OK" result code is displayed on the screen, yourmodem is OK. Otherwise, contact your dealer for assistance.Your Modem Does Not Dial OutMake sure that your modem responds normally as described in section 4.1. If you can communicate throughthe keyboard, check whether the modem is properly connected to the phone line.Your Modem Does Not Connect After It Has Dialed a Phone NumberThe problem may have several causes. The phone line may be too noisy or the telephone cord may be poor.Try the line with a regular phone. Also the remote modem may not recognize your modem's baud rate.Your Can't Transmit After You Have Connected to the Remote ModemIn this case, check the communication parameters of the remote modem, then configure your software to thesame number of data bits, stop bit, and parity.6 - APPLICATION EXAMPLES6.1 Dialing a Remote ModemCommand line: ATDP9WT002, (886)-7128423<CR>This command line instruct the modem to dial a remote modem through a PBX. The modem first use pulsedialing to dial 9 (the access code of the PBX), wait for outside dial tone, and then use touch tone dialing todial 002 once a one-second continuous dial tone is detected within 30 seconds, pause for 2 seconds (ifS8=2) and then dial 8867128423.6.2 Dialing a Stored NumberCommand line: AT&Z2=T03,709394<CR>Command line: ATDS=2<CR>The first command line store the dial string T03, 709394 to the 3rd location in NVRAM. Afterwards youcan use the second command line to dial this stored number. The dial string T03, 709394 will appear on thescreen to indicate the number being dialed.6.3 Manual Answer an Incoming Call
Command line: ATA <CR>The factory setting of the S-register S0 is S0=0. This condition disables the auto answer capability so thatyou must issue an ATA command to answer a call. At power up, your modem always monitors if there areincoming rings. If incoming rings are detected, your modem will display result codes on the screen as :RING::RINGSeeing that, you may issue the ATA command to answer the call. This command must be entered within thequiet interval between any two rings.6.4 Auto Answer an Incoming CallCommand line: AT S0=2 &W &Y <CR>Auto answer can be enabled by changing the setting of the S-register S0 to a value between 1 and 255. Inthe above command line, S0=2 instructs the modem to answer an incoming call automatically after the 2ndring. The &W command writes this configuration to profile 0 in NVRAM. &Y command instruct themodem to load profile 0 as the active configuration on power-up. The last two commands make S0=2 thedefault value at power-up or reset.This example also shows the insertion of space between two neighboring commands to make the commandline more readable.6.5 Voice to Data SwitchCommand line: ATA <CR> or ATX1D <CR>If you are talking with a remote modem user through the telephone set and want to initiate datacommunication 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. Ifconnection is successful, the CONNECT XXXX result code will be displayed on the screen. Nowyou can hang up your phone and begin data communication with the remote modem.A - MNP 10 COMMANDSA-1 MNP 10 COMMANDSAT) Commands)Mn Enable Cellular Power Level Adjustment
Enables or disables automatic adjustment of the transmit power level during link negotiation for reliablelinks to accommodate the signaling requirements of cellular telephone equipment. The parameter value, ifvalid, is written to S40 bit 2. Note that the @Mn command sets the initial transmit level.)M0 Disables power level adjustment during MNP 10 link negotiation. (default))M1 Enables power level adjustment during MNP 10 link negotiation.Result Codes:OK n = 0 or 1.ERROROtherwise.AT-Commands*Hn Link Negotiation SpeedThis command controls the connection speed for link negotiations before upshift occurs between two MNPClass 10 modems. The parameter value, if valid, is written to S28 bits 6 and 7.*H0 Link negotiation occurs at the highest supported speed. (default)*H1 Link negotiation occurs at 1200 bps.*H2 Link negotiation occurs at 4800 bps.Result Codes:OK n = 0 to 2.ERROR Otherwise.-Kn MNP Extended ServicesEnables or disables conversion of a V.42 LAPM connection to an MNP 10 connection. The parametervalue, if valid, is written to S40 bit 0, 1.-K0 Disables V.42 LAPM to MNP 10 conversion.-K1 Enables V.42 LAPM to MNP 10 conversion. (default)-K2 Enables V.42 LAPM to MNP 10 conversion; inhibits MNP Extended Services initiation during V.42 LAPM answer mode detection phase.Result Codes:OK n = 0 or 1.ERROR Otherwise.-Qn Enable Fallback to V.22 bis/V.22Enables or disables fallback from MNP 10 to V.22 bis/V.22. The parameter value, if valid, is written to S41bit 7.-Q0 Disables fallback to 2400 bps (V.22bis) and 1200 bps (V.22). Fallback is enabled only to 4800bps.
-Q1 Enables fallback to 2400 bps (V.22bis) and 1200 bps (V.22). (default)Result Codes:OK n = 0 or 1.ERROR Otherwise.B - CALLER ID COMMANDS#CIDn - Caller ID (Enables or disables Caller ID.)(for U.S.A)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 dataitems in a <Tag><Value> 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 theentire 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 separatedby commas.Formatted Form ReportingThe modem presents the data in the <tag>=<value> pair format as described in the table below.Spaces arepresent on both sides of the equal sign.TAG DescriptionDATE 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=<number> or P or O where <number> is the telephone number of the caller, where P indicates that the calling number information is not available since theoriginating caller has requested private service, and where O indicates that the callingnumber information is not available or out of service at the calling location.NAME NAME=<listing name> where <listing name> is the subscription name.MESG MESG=<data tag><length of message><data><checksum> in printable ASII hex numbers. This tag indicates a data item not listed above. The message is onlypossible for Multiple Message Format.
Notes:1. The modem does not present any Caller ID information if the DCE detects a checksum error inthe Caller ID packet.2. In the event of an unrecognized data tag, the modem will present the data in ASCII hex numbersfollowing the MESG tag.Example of Formatted Form Reporting1. The following example illustrates the standard Caller ID message packet.RING DATE = 0321 TIME = 1405 NMBR = 504551234 NAME = A N OTHER RING RING2. The following example illustrates the case where the tag of the packet is not recognized by themodem. RING MESG = 06034242431 RING RINGUnformatted Form ReportingThe 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 ispresented in ASCII printable hex numbers, the modem does not insert spaces, or line feeds, for formattingbetween bytes or words of the packet. The modem does not detect the checksum of the packet.Example of Unformatted From Reporting RING 0412303332323234303539313435353132333435 RING RINGC - TECHNICAL SPECIFICATIONSC.1 FeaturesData Rates(bps)
K56flex: 300, 1200, 2400, 4800, 7200, 9600, 12000, 14400, 19200, 21600, 24000, 26400, 28800,31200, 32000, 33600, 34000, 36000, 38000, 40000, 42000, 44000, 46000, 48000, 50000,52000, 54000, 56000V.90: 56000, 54667, 53333, 52000, 50667, 49333, 48000, 46667, 45333, 42667, 41333, 40000,38667, 37333, 36000, 34667, 33333, 32000, 30667, 29333, 28000 (Receive only)Compatibility(Data) ITU-T V.90 (for modem which supports V.90 only), V.34, V.32 bis, V.32, V.22 bis, V.23, V.22, and V.21Bell: 212A and 103, K56flex(Fax) ITU-T V.17, V.29, V.27 ter, and V.21 ch 2Command Set Enhanced 'AT' command set, Fax Class 1commandFlow Control Xon/Xoff, Hardware RTS/CTSData Compression V.42bis, MNP5Error Correction V.42, MNP 2-4 Operation Full-or Half-duplex 28800 bps with 26400, 24000, 21600, 19200, 14400, 9600,4800, 2400 and 1200 bps auto fallbackTest Modes Analog loopback, local digital loopback, and remote digital loopbackAudio Monitor Built-in speaker, with software-controllable volume control Guard Tone 550/1800 HzCompliance FCC 15&68Command Buffer 40 charactersExtra Memory 4 x 36 digitsTransmit Level -11(+/-1)dBmReceive Sensitivity -40dBmPulse Dialing SpecificationsCompatibility:
B - QUICK REFERENCEA Go On-line in Answer ModeBn Select Protocol to 300 bps or 1200 bpsCn Carrier Transmit ControlD Go On-line in Originate ModeEn Command EchoHn Hang UpIn IdentificationLn Control Speaker VolumeMn Monitor Speaker On/OffNn Automode EnableOn Return to On-line Data ModeP Set Pulse Dial as Default
Q Result Code DisplaySn Reading and Writing to S RegistersT Set Tone Dial as DefaultVn Select Word or Digit Result CodesWn Negotiation Progress ReportingXn Extended Result CodesYn Enables or Disables Long Space DisconnectZn Reset&Cn Select DCD Options&Dn DTR Option&F Fetch Factory Configuration&Gn Set Guard Tone&Kn DTE/Modem Flow Control&Mn Communication Mode&Pn Select Pulse Dialing Make/Break Ratio&Qn Asynchronous Mode Selection&Sn DSR Option&Tn Testing and Diagnostics (See Chapter 4)&V View Configuration Profiles&Wn Store the Current Configuration to Nonvolatile RAM&Yn Select the Default Profile&Zn Store Telephone Numbers (n=0 to 3)\An Select Maximum MNP Block Size\Bn Transmit Break to Remote\Gn Modem to Modem Flow Control (XON/XOFF)\Kn Break Control\Nn Operating Mode Control
\Vn Single Line Connect Message Enable%Cn Enable/Disable Data Compression%En Enable/Disable Line Quality Monitor and Auto-Retrain or Fallback/Fall Forward%L Report Received Signal Level%Q Line Signal Quality+MS Select Modulation** Download to Flash Memory(For models with flash Memory only)@ Answer, Pause! Initiate a Hookflash; Return to Command State after Dialing^Tone ControlJPerform MNPKEnable Power LevelLRe-dial Last NumberPPulse DialingS Dial a Stored NumberTTouchtone DialingW Wait for DialtoneA/ Repeat Command+++ EscapeE - GLOSSARYASCII - An acronym for American Standard Code for Information Exchange. ASCII is a seven-bit codewhich defines 128 standard characters, including control characters, letters, numbers, and symbols. An extra128 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 personalcomputers. Each serial port in a personal computer has a different number.CTS - Clear To Send.Default - The assumed value that is used for a command parameter when no other value is explicitlyprovided.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 ratioin pulse dialing.Modem - A combination of the words MOdulator and DEModulator. Modems transform digital data intoanalog signals and back again.Nonvolatile Memory - An area of memory inside the modem where the default configuration profile isstored. 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 executescommands 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 sentor received from the remote modem in this state. No commands will be accepted from the modem exceptthe escape command which will bring the modem into the on-line command state.On-Line Command State - A modem state in which the modem can accept or execute commands froman asynchronous computer or terminal while remaining connected with the remote modem. The user canreturn the modem to the on-line state by issuing the AT0n command or put it into the off-line commandstate 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 modemare listed in Appendix B.PSK - Phase Shift Keying.Pulse Dialing - A dialing form in which each digit is represented by a series of pulses. Rotary telephonesall 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. Thismemory 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.F - ASCII CODE TABLEDecimal Hex Value Decimal Hex Value Decimal Hex Value Decimal Hex Value000 00 NUL 032 20 (space)064 40 @ 096 60 '001 01 SOH 033 21 ! 065 41 A 097 61 a002 02 STX 034 22 " 066 42 B 098 62 b003 03 ETX 035 23 # 067 43 C 099 63 c004 04 EOT 036 24 $ 068 44 D 100 64 d005 05 ENQ 037 25 % 069 45 E 101 65 e006 06 ACK 038 26 & 070 46 F 102 66 f007 07 BEL 039 27 ' 071 47 G 103 67 g008 08 BS 040 28 ( 072 48 H 104 68 h009 09 HT 041 29 ) 073 49 I 105 69 i010 0A LF 042 2A * 074 4A J 106 6A j011 0B VT 043 2B + 075 4B K 107 6B k012 0C FF 044 2C , 076 4C L 108 6C l013 0D CR 045 2D - 077 4D M 109 6D m014 0E SO 046 2E . 078 4E N 110 6E n015 0F SI 047 2F / 079 4F O 111 6F o016 10 DLE 048 30 0 080 50 P 112 70 p017 11 DC1 049 31 1 081 51 Q 113 71 q018 12 DC2 050 32 2 082 52 R 114 72 r019 13 DC3 051 33 3 083 53 S 115 73 s
020 14 DC4 052 34 4 084 54 T 116 74 t021 15 NAK 053 35 5 085 55 U 117 75 u022 16 SYN 054 36 6 086 56 V 118 76 v023 17 ETB 055 37 7 087 57 W 119 77 w024 18 CAN 056 38 8 088 58 X 120 78 x025 19 EM 057 39 9 089 59 Y 121 79 y026 1A SUB 058 3A : 090 5A Z 122 7A z027 1B ESC 059 3B ; 091 5B [ 123 7B {028 1C FS 060 3C < 092 5C \ 124 7C |029 1D GS 061 3D = 093 5D ] 125 7D }030 1E RS 062 3E > 094 5E ^ 126 7E ~031 1F US 063 3F ? 095 5F _ 127 7F DEL

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