Section Three - AT Command Set 3.1 Executing Commands Commands are accepted by the modem while it is in Command Mode. Your modem is automatically in Command Mode until you dial a number and establish a connection. Commands may be sent to your modem from a PC running communication software or any other terminal devices. Your modem is capable of data communication at rates of: 300, 1200, 2400, 4800, 9600, 14400, 19200, 28800, 38400, 57600, and 115200 bps. Make sure your COM port baud rate settings in your communications software is set to one of the above speeds. 3.2 Command Structure All commands sent to the modem must begin with AT and end with ENTER. All commands may be typed in either upper or lower case, but not mixed. To make the command line more readable, spaces may be inserted between commands. If you omit a parameter from a command that requires one, it is just like specifying a parameter of 0. Example: ATH [ENTER] This command causes your modem to hang up. 3.3 Basic AT Commands In the following listings, all default settings are printed in bold text. Command Function A Manually answer incoming call. A/ Repeat last command executed. Do not precede A/ with AT or follow with ENTER. B_ B0 CCITT mode B1 Bell mode D_ 0 - 9, A-D, # and * L last number redial P pulse dialing T touch-tone dialing W wait for second dial tone , pause @ wait for five seconds of silence ! flash ; return to Command Mode after dialing DS=n Dial one of the four telephone numbers (n=0-3) stored in the modem's non-volatile memory. E_ E0 Commands are not echoed E1 Commands are echoed +++ Escape Characters - Switch from Data Mode to Command Mode H_ H0 Force modem on-hook (hang up) H1 Force modem off-hook (make busy) I_ I0 Display product-identification code I1 Factory ROM checksum test I2 Internal memory test I3 Firmware ID I4 Reserved ID L_ L0 Low speaker volume L1 Low speaker volume L2 Medium speaker volume L3 High speaker volume M_ M0 Internal speaker off M1 Internal speaker on until carrier detected M2 Internal speaker always on M3 Internal speaker on until carrier detected and off while dialing N_ N0 Disable Autoscan mode N1 Enable Autoscan mode O_ O0 Return to Data Mode O1 Return to Data Mode and initiate an equalizer retrain P Set Pulse dial as default Q_ Q0 Modem sends responses Q1 Modem does not send responses Sr? Read and display value in register r. Sr=n Set register r to value n (n = 0-255). T Set Tone Dial as default V_ V0 Numeric responses V1 Word responses W_ W0 Report DTE speed only W1 Report line speed, error correction protocol, and DTE speed. W2 Report DCE speed only X_ X0 Hayes Smartmodem 300 compatible responses/blind dialing. X1 Same as X0 plus all CONNECT responses/blind dialing X2 Same as X1 plus dial tone detection X3 Same as X1 plus busy detection/blind dialing X4 All responses and dial tone and busy signal detection Y_ Y0 Modem does not send or respond to break signals Y1 Modem sends break signal for four seconds before disconnecting Z_ Z0 Reset and retrieve active profile 0 Z1 Reset and retrieve active profile 1 3.4 Extended AT Commands &C_ &C0 Force Carrier Detect Signal High (ON) &C1 Turn on CD when remote carrier is present &D_ &D0 Modem ignores the DTR signal &D1 Modem returns to Command Mode after DTR toggle &D2 Modem hangs up, returns to the Command Mode after DTR toggle &D3 Resets modem after DTR toggle &F_ &F Recall factory default configuration &G_ &G0 Guard tone disabled &G1 Guard tone disabled &G2 1800 Hz guard tone &K_ &K0 Disable flow control &K3 Enable RTS/CTS hardware flow control &K4 Enable XON/XOFF software flow control &K5 Enable transparent XON/XOFF flow control &K6 Enable both RTS/CTS and XON/XOFF flow control &L_ &L0 Modem is set up for dial-up operation &M_ &M0 Asynchronous operation &P_ &P0 US setting for off-hook-to-on-hook ratio &P1 UK and Hong Kong off-hook-to-on-hook ratio &P2 Same as &P0 setting but at 20 pulses per minute &P3 Same as &P1 setting but at 20 pulses per minute &R_ &R0 Reserved &R1 CTS operates per flow control requirements &S_ &S0 Force DSR Signal High (ON) &S1 DSR off in command mode, on in on-line mode &T_ &T0 Ends test in progress &T1 Perform Local Analog Loopback Test &T3 Perform Local Digital Loopback Test &T4 Grant Remote Digital Loopback Test request by remote modem &T5 Deny Remote Digital Loopback Test request &T6 Perform a Remote Digital Loopback Test &T7 Perform a Remote Digital Loopback Test and Self-Test &T8 Perform Local Analog Loopback Test and Self-Test &V &V0 Displays Active and Stored Profiles &V1 Display Last Connection Statistics &W_ &W0 Stores the active profile as Profile 0 &W1 Stores the active profile as Profile 1 &Y_ &Y0 Configuration Profile 0 active upon Power on or reset &Y1 Configuration Profile 1 active upon Power on or reset &Zn=x n=0-3 Store phone number x into non-volatile RAM %E_ %E0 Disable auto-retrain %E1 Enable auto-retrain +MS? Displays the current Select Modulation settings +MS=? Displays a list of supported Select Modulation options +MS=a,b,c,d.e,f Select modulation where: a=0, 1, 2, 3, 9, 10, 11, 56, 64, 69; b=0-1; c=300-56000; d=300-56000; e=0-1; and f=0-1. A, b, c, d, e, f default=56, 1, 300, 56000, 0, 0. Parameter "a" specifies the modulation protocol desired where: 0=V.21, 1=V.22, 2=V.22bis, 3=V.23, 9=V.32, 10=V.32bis, 11=V.34, 56=K56Plus, 64=Bell 103, and 69=Bell 212. Parameter "b" specifies automode operations where: 0=automode disabled, 1= automode enabled with V.8/V.32 Annex A. Parameter "c" specifies the minimum connection data rate (300-56000). Parameter "d" specifies the maximum connection rate (300-56000); Parameter "e" specifies the codec type (0=æ-Law, and 1=A-Law). Parameter "f" specifies "robbed bit" signaling detection (0=detection disabled 1=detection enabled) #CID=n n=0 Disable Caller ID n=1 Enables Caller ID with formatting (date, time, number, name) n=2 Enables Caller ID without formatting #CID? Displays current Caller ID mode #CID=? Returns Caller ID capabilities of modem. 3.5 MNP/V.42/V.42bis Commands %C_ %C0 Disable MNP Class 5 and V.42bis data compression %C1 Enable MNP Class 5 data compression only %C2 Enable V.42bis data compression only %C3 Enable MNP Class 5 and V.42bis data compression &Q_ &Q0 Direct data link only (same as \N1) &Q5 V.42 data link with fallback options &Q6 Normal data link only (same as \N0) \A_ \A0 64-character maximum MNP block size \A1 128-character maximum MNP block size \A2 192-character maximum MNP block size \A3 256-character maximum MNP block size \Bn Send a 1/10 second line break to the modem, where n = 1 to 9. At normal connect, the default is 3 \Kn Set break control, where n= 0 to 2. The effect of this command depends on the modem's operating condition. Default is 1. \N_ \N0 Normal data-link only \N1 Direct data-link only \N2 V.42 or MNP data link only \N3 V.42/MNP/Normal data link \N4 V.42 data link only \N5 MNP data link only 3.6 Fax Class 1 Commands +FAE=n Data/Fax Auto Answer +FCLASS=n Service Class +FRH=n Receive data with HDLC framing +FRM=n Receive data +FRS=n Receive silence +FTH=n Transmit data with HDLC framing +FTM=n Transmit data +FTS=n Stop transmission and wait 3.7 Voice Commands #BDR Select Baud Rate #CID Enable Caller ID detection and reporting format #CLS Select Data, Fax or Voice/Audio #MDL? Identify Model #MFR? Identify Manufacturer #REV? Identify Revision Level #TL Audio output transmit level #VBQ? Query Buffer Size #VBS Bits per sample (ADPCM or PCM) #VBT Beep Tone Timer #VCI? Identify Compression Method #VLS Voice line select #VRA Ringback goes away timer #VRN Ringback never came timer #VRX Voice Receive Mode #VSDB Silence deletion tuner #VSK Buffer skid setting #VSP Silence detection period #VSR Sampling rate selection #VSS Silence deletion tuner #VTD DTMF tone reporting capability #VTM Enable timing mark placement #VTS Generate tone signals #VTX Voice transmit mode Section Four - S Registers Your modem has 41 registers, designated S0 through S95. Table 4-1 shows the registers, their functions, and their default values. Some registers can have their values changed by commands. If you use a command to change a register value, the command remains in effect until you turn off or reset your modem. Your modem then reverts to the operating characteristics specified in its non-volatile memory. Refer to Section 3 for information on how to use the AT commands to manipulate the S registers. Table 4-1 S - Registers Register Function Range/units Default S0 Auto-answer Ring 0-255 /rings 0 S1 Ring counter 0-255 /rings 0 S2 Escape code character 0-127 /ASCII 43 S3 Carriage return character 0-127 /ASCII 13 S4 Line feed character 0-127 /ASCII 10 S5 Backspace character 0-32, 127 /ASCII 8 S6 Dial tone wait time 2-255 /seconds 2 S7 Remote carrier wait time 1-255 /seconds 50 S8 Comma pause time 0-255 /seconds 2 S9 Carrier detect response time 1-255 /0.1 second 6 S10 Carrier loss time 1-255 /0.1 second 14 S11 Touch-tone dialing speed 50-255 /milliseconds 95 S12 Escape character guard time 0-255 /0.02 second 50 S13 Reserved S14 Echo, response, dialing, Bit-mapped register originate/answer S15 Reserved S16 Modem tests Bit-mapped register 0 S17 Reserved S18 Length of modem tests 0-255 /seconds 0 S19-20 Reserved S21 CTS, DTR, DCD, DSR and Bit-mapped register long space disconnect S22 Speaker and response Bit-mapped register S23 Remote digital loopback Bit-mapped register request, data rate, parity S24 Sleep mode timer 0-255 seconds 0 S25 Data terminal ready delay 0-255 /0.01 second 5 S26 RTS to CTS delay interval 0-255 /0.01 second 1 S27 Asynchronous/Bell/CCITT Bit-mapped register modes S28 Pulse dial, make/break ratio Bit-mapped register S29 Flash time 0-255 /0.01second 0 S30 Disconnect timer 0-255 /10 seconds 0 S31 Autoscan, EC result code Bit-mapped register S32 XON character 0-255 /ASCII 17 S33 XOFF character 0-255 /ASCII 19 S34-35 Reserved S36 LAPM failure options Bit-mapped register 7 S37 Reserved S38 Hang-up delay 0-255 /seconds 20 S39 Flow control options Bit-mapped register 3 S40 MNP options, break types Bit-mapped register 104 block modes S41 Compression, retrain Bit-mapped register 134 S42-45 Reserved S46 Data compression control 136 or 138 138 S47 Reserved S48 V.42 negotiation options 0, 7, or 128 7 S49-81 Reserved S82 Break options 3, 7, or 128 128 S83-85 Reserved S86 Connection failure code 0, 4, 5, 9, 12, 13, 14 S87-S90 Reserved S91 Transmit attenuation 0-15/dBm 10 S92 Fax attenuation 0-15/dBm 10 S95 Extended result code options Bit-mapped register 0 Section Five - Result Codes OK 0 CONNECT 1 RING 2 NO CARRIER 3 ERROR 4 CONNECT 1200 5 NO DIALTONE 6 BUSY 7 NO ANSWER 8 CONNECT 600 9 CONNECT 2400 10 CONNECT 4800 11 CONNECT 9600 12 CONNECT 7200 13 CONNECT 12000 14 CONNECT 14400 15 CONNECT 19200 16 CONNECT 32000 165 CONNECT 34000 166 CONNECT 36000 167 CONNECT 38000 168 CONNECT 38400 17 CONNECT 40000 169 CONNECT 42000 170 CONNECT 44000 171 CONNECT 46000 172 CONNECT 48000 173 CONNECT 50000 174 CONNECT 52000 175 CONNECT 54000 176 CONNECT 56000 177 CONNECT 57600 18 CONNECT 58000 178 CONNECT 60000 179 CONNECT 115200 19 CONNECT 1200TX/75RX 22 CONNECT 75TX/1200RX 23 FAX 33 DATA 35 CARRIER 300 40 CARRIER 1200/75 44 CARRIER 75/1200 45 CARRIER 1200 46 CARRIER 2400 47 CARRIER 4800 48 CARRIER 7200 49 CARRIER 9600 50 CARRIER 12000 51 CARRIER 14400 52 CARRIER 21600 55 CARRIER 24000 56 CARRIER 26400 57 CARRIER 28800 64 CARRIER 32000 150 CARRIER 34000 151 CARRIER 36000 152 CARRIER 38000 153 CARRIER 40000 154 CARRIER 42000 155 CARRIER 44000 156 CARRIER 46000 157 CARRIER 48000 158 CARRIER 50000 159 CARRIER 52000 160 CARRIER 54000 161 CARRIER 56000 162 CARRIER 58000 163 CARRIER 60000 164 COMPRESSION: CLASS 5 66 COMPRESSION: V.42BIS 67 COMPRESSION: NONE 69 PROTOCOL: NONE 70 PROTOCOL: LAPM 77 PROTOCOL: ALT 80 +FCERROR +F4Download Driver Pack
After your driver has been downloaded, follow these simple steps to install it.
Expand the archive file (if the download file is in zip or rar format).
If the expanded file has an .exe extension, double click it and follow the installation instructions.
Otherwise, open Device Manager by right-clicking the Start menu and selecting Device Manager.
Find the device and model you want to update in the device list.
Double-click on it to open the Properties dialog box.
From the Properties dialog box, select the Driver tab.
Click the Update Driver button, then follow the instructions.
Very important: You must reboot your system to ensure that any driver updates have taken effect.
For more help, visit our Driver Support section for step-by-step videos on how to install drivers for every file type.