MOTOROLA, INC. V.3400 Modem Type Data (synchronous/asynchronous)/Fax Maximum Data Rate 28.8Kbps Maximum Fax Rate 14.4Kbps Data Bus External Fax Class Class I Data Modulation Protocol Bell 103A/212A ITU-T V.21, V.22, V.22bis, V.32, V.32bis, V.33, V.34 Fax Modulation Protocol ITU-T V.17, V.21CH2, V.27ter, V.29 Error Correction/Compression MNP5, V.42, V.42bis [Image] CONNECTIONS Purpose Location Purpose Location YES button BT1 Leased line out CN2 NO button BT2 RS-232/422 CN3 TALK/DATA button BT3 Fuse FUSE Switched line out CN1 Power switch SW1 DIAGNOSTIC LED(S) LED Color Status Condition TR Red On DTR signal is high TR Red Off DTR signal is low CS Red On CTS signal is high CS Red Off CTS signal is low RS Red On RTS signal is high RS Red Off RTS signal is low CD Red On Carrier signal detected CD Red Off Carrier signal not detected RD Red On Modem is receiving data RD Red Off Modem is not receiving data TD Red On Modem is transmitting data TD Red Off Modem is not transmitting data Proprietary AT Command Set ANSWER/ORIGINATE MODE Type: Configuration Format: AT [cmds] *ORn [cmds] Example: AT *OR0 Description: Selects whether the modem is in answer or originate mode. Command Function » *OR0 Modem is in originate mode. *OR1 Modem is in answer mode. AUTO-ANSWER OVERRIDE Type: Immediate Format: AT [cmds] *IC [cmds] Example: AT *IC Description: Instructs the modem to ignore the incoming call, if the modem is set to automatically answer. AUTODIALING STORED NUMBER Type: Configuration Format: AT [cmds] *AUn [cmds] Example: AT *AU4 *CN4,1(303)443-3388 Description: Sets the autodialing function to dial the number stored in memory location n. AUTO-RELIABLE FALLBACK CHARACTER Type: Register Format: AT [cmds] %An [cmds] Example: AT%A20 Default: 19 Range: 0-127 Unit: ASCII Description: Sets the character used as the auto-reliable fallback character. %A0 will disable this function. AUTO-RELIABLE FALLBACK CHARACTER Type: Register Format: AT [cmds] S64=n [cmds] Example: ATS64=20 Range: 0-127 Unit: ASCII Description: Sets the character used as the auto-reliable fallback character. S64=0 will disable this function. AUTO-RELIABLE TIME BUFFER CONFIGURATION Type: Configuration Format: AT [cmds] \Cn [cmds] Example: AT \C1 &W Description: Controls the handling of incoming data during auto-reliable time period. Command Function » \C0 Data is discarded. \C1 Data is buffered. AUTO-RETRAIN Type: Configuration Format: AT %En Example: AT %E1 *MM12 Description: Selects auto-retrain mode. Command Function %E0 Auto-retrain disabled. » %E1 Auto-retrain enabled. BIT-MAPPED REGISTER S14 Format AT [cmds] S14=n [cmds] Example: ATS14=40 Default: 138 Range: 0 - 190 Unit: Bit-mapped Description: Controls command echo, result codes, dialing mode, and answer/originate mode. Bit Value Function 0 0 Not used. 1 0 Command echo off. » 1 Command echo on. 2 » 0 Result codes enabled. 1 Result codes disabled. 3 0 Numeric result codes. » 1 Verbose result codes. 4 » 1 Not used. 5 » 0 Tone dialing selected. 1 Pulse dialing selected. 6 0 Not used. 7 0 Answer mode selected. » 1 Originate mode selected. BIT-MAPPED REGISTER S21 Format AT [cmds] S21=n [cmds] Example: ATS21=1 Default: 132 Range: 0 - 255 Unit: Bit-mapped Description: Controls low DTR action, DCD signal, and the Long Space Disconnect function. Note: Be aware that the bits are out of order. Bit Value Function 6, 0 » 00 DSR forced high. 01 DSR normal, except forced low on disconnect. 10 DSR normal. 11 DSR follows OH. 5, 1 » 00 CD forced high. 01 CD forced high except during disconnect. 10 CD normal. 11 CD follows remote RTS signal. 2 0 CTS normal. » 1 CTS forced high. 4, 3 » 00 DTR signal ignored. 01 Modem goes to command mode on low DTR. 10 Modem disconnects on low DTR. 11 Modem resets on low DTR. 7 0 Long Space Disconnect function disabled. » 1 Long Space Disconnect function enabled. BIT-MAPPED REGISTER S22 Format AT [cmds] S22=n [cmds] Example: ATS22=114 Default: 70 Range: 0 - 255 Unit: Bit-mapped Description: Controls volume and speaker settings, result codes, and make/break pulse ratio. Bit Value Function 1, 0 00 Lowest volume setting. 01 Low volume setting. » 10 Medium volume setting 11 Highest volume setting. 3, 2 00 Speaker disabled. » 01 Speaker enabled until carrier signal detected 10 Speaker enabled. 11 Speaker enabled following dialing, then disabled after carrier signal detected. 6, 5 ,4 000 Busy and dialtone detection disabled, result codes 0-4 enabled. 001 Busy and dialtone detection disabled, 010 result codes 0-5, 10 enabled. 011 Busy tone detection disabled, dialtone detection enabled, result codes 0-6, 10 » 100 enabled. Busy tone detection enabled, dialtone detection disabled, result codes 0-5, 7, 10 enabled. Busy and dialtone detection enabled, result codes 0-7, 10 enabled. 7 » 0 Pulse dialing at 39/61ms at 10pps. 1 Pulse dialing at 33/67ms at 10pps. BIT-MAPPED REGISTER S23 Format AT [cmds] S23=n [cmds] Example: ATS23=177 Default: 1 Range: 0 - 129 Unit: Bit-mapped Description: Grants/denies remote digital loopback and sets guard tone. Bit Value Function 0 0 Remote digital loopback denied. » 1 Remote digital loopback allowed. 1 0 Not used. 2 0 Not used. 3 0 Not used. 4 0 Not used. 5 0 Not used. 7, 6 » 00 Guard tone disabled. 01 Guard tone at 500Hz enabled. 10 Guard tone at 1800Hz enabled. BIT-MAPPED REGISTER S27 Format AT [cmds] S27=n [cmds] Example: ATS27=9 Default: 9 Range: 0 - 127 Unit: Bit-mapped Description: Selects sync/async mode, line type, clock source, and ITU-T/Bell modes. Bit Value Function 1, 0 00 Asynchronous command and data modes. 01 Asynchronous command, synchronous connect mode. » 10 DTR dialing enabled, synchronous connect 11 mode. Manual dialing only, synchronous connect mode. 2 » 0 Switched line. 1 Leased line. 3 0 Not used. 5, 4 » 00 Internal DTE transmit clock source. 01 External DTE transmit clock source. 10 Slave DTE transmit clock source. 6 » 0 DTR dialing enabled. 1 DTR dialing disabled. BIT-MAPPED REGISTER S29 Format AT [cmds] S29=n [cmds] Example: ATS29=4 Default: 0 Range: 0 - 135 Unit: Bit-mapped Description: Controls command set, option retaining, V.32 fast handshaking, and DTE fallback. Bit Value Function 0 » 0 AT command set enabled. 1 AT command set disabled. 1 » 0 Modem will not reset on disconnect. 1 Modem will reset on disconnect. 2 » 0 Normal V.32 handshake sequence. 1 Training time is shortened by 2 seconds in V.32 and V.32bis modes. 3 0 Not used. 4 0 Not used. 5 0 Not used. 6 0 Not used. 7 » 0 DTR dialing enabled. 1 DTR dialing disabled. BIT-MAPPED REGISTER S32 Format AT [cmds] S32=n [cmds] Example: ATS32=14 Default: 6 Range: 0 - 15 Unit: Bit-mapped Description: Controls line type, disconnect on loss of current, and leased line backup mode. Bit Value Function 0 » 0 2-wire leased line. 1 4-wire leased line. 2, 1 00 Do not disconnect on loss of current. 01 Disconnect after 8ms if current is lost. » 11 Disconnect after 90ms if current is lost. 3 » 0 Modem will restore leased line connection only when modem receives *LB or *LD. 1 Modem will restore leased line connection automatically. BIT-MAPPED REGISTER S60 Format AT [cmds] S60=n [cmds] Example: ATS60=4 Default: 67 Range: 0 - 199 Unit: Bit-mapped Description: Controls auto-retrain, MNP, auto-reliable time buffering, RI signal, and extended result codes. Bit Value Function 0 0 Auto-retrain disabled. » 1 Auto-retrain enabled. 1 0 MNP disabled. » 1 MNP enabled. 2 » 0 Data is discarded during auto-relaible time. 1 Data is buffered during auto-relaible time. 5 - 3 0 Not used. 6 0 RI signal high during rings, and forced high for duration of call. » 1 RI signal high during rings only. 7 » 0 Extended result codes disabled. 1 Extended result codes enabled. BIT-MAPPED REGISTER S70 Format AT [cmds] S70=n [cmds] Example: ATS70=7 Default: 15 Range: 0 - 15 Unit: Bit-mapped Description: Controls connect mode and V.42 negotiation mode. Bit Value Function 2, 1, 0 000 Normal mode enabled. 001 Direct mode enabled. 010 MNP mode only enabled. 011 MNP mode with fallback to normal mode enabled. 100 LAP-M mode only enabled. 101 LAP-M mode with fallback to normal mode 110 enabled. » 111 LAP-M mode with fallback to MNP enabled. LAP-M mode with fallback to MNP and normal modes enabled. 3 0 Normal V.42 handshaking enabled. » 1 Fast V.42 handshaking enabled. BIT-MAPPED REGISTER S72 Format AT [cmds] S72=n [cmds] Example: ATS72=7 Default: 0 Range: 0 - 137 Unit: Bit-mapped Description: Controls serial port lock, CTS signal, and autocallback function. Bit Value Function 0 » 0 Serial speed locked. 1 Serial speed follows connect speed. 2 - 1 0 Not used. 3 » 0 CTS normal. 1 CTS follows CD. 6 - 4 0 Not used. 7 » 0 Autocallback disabled. 1 Autocallback enabled. The modem, upon detecting an incoming call, will dial the default number and connect with it instead of the incoming call. BIT-MAPPED REGISTER S84 Format AT [cmds] S84=n [cmds] Example: ATS84=7 Default: 0 Range: 0 - 93 Unit: Bit-mapped Description: Controls disconnect during handshaking, V.22 fallback, answerback, dial backup trigger, and frame tracking. Bit Value Function 0 » 0 Disconnect if key is pressed during handshaking. 1 Do not disconnect if key is pressed during handshaking. 1 0 Not used. 2 » 0 Normal fallback to V.22. 1 Fast fallback to V.22. 3 » 0 Normal answerback. 1 Fast answerback. 4 » 0 DTR signal must go from low to high four times for dial backup to occur. 1 DTR signal must go from low to high once for dial backup to occur. 5 0 Not used. 6 » 0 Frame tracking disabled. 1 Frame tracking enabled. BREAK SEND Type: Configuration Format: AT [cmds] \Bn [cmds] Example: AT \B50 O Default: 35 Range: 1-255 Unit: 20ms Description: Sends break to modem. BREAK LENGTH Type: Register Format: AT [cmds] S79=n [cmds] Example: ATS79=20 Default: 35 Range: 0 - 255 Unit: 20 ms Description: Sets the length of breaks sent from DCE to DTE. BREAK TYPE Type: Configuration Format: AT [cmds] \Kn [cmds] Example: AT \K1 Description: Configures action of break signal. Command Break from DTE Break from Modem Break from DTE receives \B remote modem Reliable/Normal mode Direct mode \K0 Enter command Send break to Buffers Buffers mode, do not remote modem cleared and cleared and send break to immediately, break sent to break sent to remote modem. then enter remote modem. DTE. command mode. \K1 Buffers cleared Send break to Buffers Buffers and break sent remote modem cleared and cleared and to remote immediately. break sent to break sent to modem. remote modem. DTE. \K2 Enter command Send break to Send break to Send break to mode, do not remote modem remote modem DTE send break to immediately, immediately. immediately. remote modem. then enter command mode. \K3 Send break to Send break to Send break to Send break to remote modem remote modem remote modem DTE immediately. immediately. immediately. immediately. \K4 Enter command Send break to Send break to Break sent mode, do not remote modem remote modem with received send break to immediately, with data to the remote modem. then enter transmitted DTE. command mode. data. » \K5 Send break with Send break to Send break to Break sent transmitted remote modem remote modem with received data. immediately. with data to the transmitted DTE. data. BREAK TYPE Type: Register Format: AT [cmds] S59=n [cmds] Example: AT S59=1 Description: Configures action of break signal. Command Break from DTE Break from Modem Break from DTE receives \B remote modem Reliable/Normal mode Direct mode S59=0 Enter command Send break to Buffers Buffers mode, do not remote modem cleared and cleared and send break to immediately, break sent to break sent to remote modem. then enter remote modem. DTE. command mode. S59=1 Buffers cleared Send break to Buffers Buffers and break sent remote modem cleared and cleared and to remote immediately. break sent to break sent to modem. remote modem. DTE. S59=2 Enter command Send break to Send break to Send break to mode, do not remote modem remote modem DTE send break to immediately, immediately. immediately. remote modem. then enter command mode. S59=3 Send break to Send break to Send break to Send break to remote modem remote modem remote modem DTE immediately. immediately. immediately. immediately. S59=4 Enter command Send break to Send break to Break sent mode, do not remote modem remote modem with received send break to immediately, with data to the remote modem. then enter transmitted DTE. command mode. data. » S59=5 Send break with Send break to Send break to Break sent transmitted remote modem remote modem with received data. immediately. with data to the transmitted DTE. data. CD SIGNAL Type: Configuration Format: AT [cmds] &Cn [cmds] Example: AT &C3 *RS1 *SR1 Description: Configures the behavior of the carrier detect signal. Command Function » &C0 CD forced high. &C1 CD normal. &C2 CD forced high except during disconnect. &C3 CD follows remote RTS signal. CHARACTER LENGTH AND PARITY Format AT [cmds] S61? [cmds] Example: ATS61? Default: Read-only Range: 0 - 56 Unit: Bit-mapped Description: Reports current character length and parity. Bit Value Meaning 2 - 0 0 Not used. 3 0 7 bit character length set. » 1 8 bit character length set. 5, 4 » 00 MARK parity. 01 No parity. 10 Odd parity. 11 Even parity. COMMAND SET Type: Configuration Format: AT [cmds] *NTn [cmds] Example: AT *NT0 Description: Disables the AT command set. Note: To re-enable the command set, power down the modem and then cycle power seven times. The modem must remain powered on each time at least one second but not more than five. Command Function » *NT0 Command set disabled. *NT1 Command set enabled. COMMUNICATIONS MODE Type: Configuration Format: AT [cmds] &Mn [cmds] Example: AT &M2 H1 DT555-1212 Description: Selects the active communications mode. Command Function » &M0 Asynchronous command and data modes. &M1 Asynchronous command, synchronous connect mode. &M2 DTR dialing enabled, synchronous connect mode. &M3 Manual dialing only, synchronous connect mode. &M4 V.25bis bisynchronous command, synchronous connect mode. &M5 V.25bis SDLC command, synchronous connect mode. &M6 V.25bis asynchronous command, synchronous connect mode. COMPRESSION Type: Configuration Format: AT %Cn Example: AT *EC0 %C1 *AP0 Description: Selects data compression. Command Function %C0 Data compression disabled. » %C1 Data compression enabled. %C2 Data compression enabled on transmit only. %C3 Data compression enabled on receive only. COMPRESSION Type: Register Format: AT S56=n Example: AT *EC0 S56=1 *AP0 Description: Selects data compression. Command Function S56=0 Data compression disabled. S56=1 Data compression enabled on transmit only. S56=2 Data compression enabled on receive only. » S56=3 Data compression enabled. COMPRESSION AND ERROR CORRECTION - CURRENT Type: Register Format: AT [cmds] S71? [cmds] Example: AT S71? Default: Read-only Description: Reports current compression and error correction protocols. Value Meaning 0 No compression or error correction protocols active. 1 Negotiation in progress. 2 MNP2 active. 3 MNP3 active. 4 MNP4 active. 5 MNP5 active. 6 V.42 active. 7 V.42bis active. CONNECT MODE Type: Configuration Format: AT [cmds] \Nn [cmds] Example: AT \N1 DT555-1212 Description: Sets connect mode. Command Function \N0 Normal mode enabled. \N1 Direct mode enabled. \N2 MNP mode only enabled. \N3 MNP mode with fallback to normal mode enabled. \N4 LAP-M mode only enabled. \N5 LAP-M mode with fallback to normal mode enabled. \N6 LAP-M mode with fallback to MNP enabled. » \N7 LAP-M mode with fallback to MNP and normal modes enabled. CONNECTION SPEED - CURRENT Type: Register Format: AT [cmds] S67? [cmds] Example: AT S67? Default: Read-only Description: Reports current connection speed. Value Meaning 1 300bps current speed. 3 1200bps current speed. 4 2400bps current speed. 5 4800bps current speed. 6 7200bps current speed. 7 9600bps uncoded current speed. 8 9600bps current speed. 9 12Kbps current speed. 10 14.4Kbps current speed. 11 16.8Kbps current speed. 12 19.2Kbps current speed. 13 21.6Kbps current speed. 14 24Kbps current speed. 15 26.4Kbps current speed. 16 28.8Kbps current speed. CONNECTION SPEED LOWER LIMIT Type: Configuration Format: AT [cmds] %Ln [cmds] Example: AT %L3 %B14 \J0 Description: Sets slowest allowed connection speed. Command Function » %L0 No minimum speed. %L2 Select 1200bps minimum speed. %L3 Select 2400bps minimum speed. %L4 Select 4800bps minimum speed. %L5 Select 9600bps uncoded minimum speed. %L6 Select 9600bps minimum speed. %L7 Select 7200bps minimum speed. %L8 Select 12Kbps minimum speed. %L9 Select 14.4Kbps minimum speed. %L11 Select 16.8Kbps minimum speed. %L12 Select 19.2Kbps minimum speed. %L13 Select 21.6Kbps minimum speed. %L14 Select 24Kbps minimum speed. %L15 Select 26.4Kbps minimum speed. %L16 Select 28.8Kbps minimum speed. CONNECTION SPEED LOWER LIMIT Type: Configuration Format: AT [cmds] S81=n [cmds] Example: AT %L3 S81=14 \J0 Description: Sets slowest allowed connection speed. Command Function S81=0 No minimum speed. S81=3 Select 1200bps minimum speed. S81=4 Select 2400bps minimum speed. S81=5 Select 4800bps minimum speed. S81=6 Select 7200bps minimum speed. S81=7 Select 9600bps uncoded minimum speed. S81=8 Select 9600bps minimum speed. S81=9 Select 12Kbps minimum speed. S81=10 Select 14.4Kbps minimum speed. S81=11 Select 16.8Kbps minimum speed. S81=12 Select 19.2Kbps minimum speed. S81=13 Select 21.6Kbps minimum speed. S81=14 Select 24Kbps minimum speed. S81=15 Select 26.4Kbps minimum speed. S81=16 Select 28.8Kbps minimum speed. CONNECTION SPEED UPPER LIMIT Type: Configuration Format: AT [cmds] %Bn [cmds] Example: AT %L3 %B14 \J0 Description: Sets fastest allowed connection speed. Command Function %B0 Follow serial port speed. %B1 Select 300bps maximum speed. %B2 Select 1200bps maximum speed. %B3 Select 2400bps maximum speed. %B4 Select 4800bps maximum speed. %B5 Select 9600bps uncoded maximum speed. %B6 Select 9600bps maximum speed. %B7 Select 7200bps maximum speed. %B8 Select 12Kbps maximum speed. » %B9 Select 14.4Kbps maximum speed. %B11 Select 16.8Kbps maximum speed. %B12 Select 19.2Kbps maximum speed. %B13 Select 21.6Kbps maximum speed. %B14 Select 24Kbps maximum speed. %B15 Select 26.4Kbps maximum speed. %B16 Select 28.8Kbps maximum speed. CONNECTION SPEED UPPER LIMIT Type: Configuration Format: AT [cmds] S69=n [cmds] Example: AT %L3 S69=14 \J0 Description: Sets fastest allowed connection speed. Command Function S69=0 Follow serial port speed. S69=1 Select 300bps maximum speed. S69=3 Select 1200bps maximum speed. S69=4 Select 2400bps maximum speed. S69=5 Select 4800bps maximum speed. S69=6 Select 7200bps maximum speed. S69=7 Select 9600bps uncoded maximum speed. S69=8 Select 9600bps maximum speed. S69=9 Select 12Kbps maximum speed. » S69=10 Select 14.4Kbps maximum speed. S69=11 Select 16.8Kbps maximum speed. S69=12 Select 19.2Kbps maximum speed. S69=13 Select 21.6Kbps maximum speed. S69=14 Select 24Kbps maximum speed. S69=15 Select 26.4Kbps maximum speed. S69=16 Select 28.8Kbps maximum speed. CTS SIGNAL Type: Configuration Format: AT [cmds] &Rn [cmds] Example: AT &R0 Description: Selects the function of the CTS signal. Command Function &R0 CTS normal. » &R1 CTS forced high. &R2 CTS follows CD. &R9 CTS follows RTS. DISCONNECT BUFFER DELAY Type: Configuration Format: AT [cmds] %Dn [cmds] Example: AT %D0 Default: 0 Range: 0-255 Unit: 1 second Description: Configures how long the modem will wait to disconnect if there is data in the transmit or receive buffers. DISCONNECT BUFFER DELAY Type: Register Format: AT [cmds] S62=n [cmds] Example: AT S62=0 Default: 0 Range: 0-255 Unit: 1 second Description: Configures how long the modem will wait to disconnect if there is data in the transmit or receive buffers. DISCONNECT ON LOSS OF CURRENT Type: Configuration Format: AT [cmds] *LCn [cmds] Example: AT*LC0 Description: Causes the modem to disconnect if the telephone line’s current drops. Command Function *LC0 Do not disconnect on loss of current. *LC1 Disconnect after 8ms if current is lost. » *LC2 Disconnect after 90ms if current is lost. DISCONNECT RESET Type: Configuration Format: AT [cmds] *ROn [cmds] Example: AT*RO0 Description: Selects whether the modem will reset on disconnect. Command Function » *RO0 Modem will not reset on disconnect. *RO1 Modem will reset on disconnect. DISPLAY STORED NUMBERS Type: Immediate Format: AT [cmds] *ND [cmds] Example: AT*CN3,555-1212 *ND Description: Displays all stored phone numbers. DSR SIGNAL Type: Configuration Format: AT [cmds] &Sn [cmds] Example: AT &S0 Description: Selects the function of the DSR signal. Command Function » &S0 DSR forced high. &S1 DSR normal. &S2 DSR normal, except forced low on disconnect. &S3 DSR follows OH. EXTENDED RESULT CODES Type: Configuration Format: AT [cmds] \Vn [cmds] Example: AT \V1 %C1 Description: Selects extended result codes. Command Function » \V0 Extended result codes disabled. \V1 Extended result codes enabled. EXTENDED RESULT CODES Type: Configuration Format: AT [cmds] S82=n [cmds] Example: AT %L3 S82=4 \J0 Description: Selects extended result codes. Command Function » S82=0 Display DTE rate; extended result codes disabled. S82=4 Display DCE rate; extended result codes enabled. S82=8 Display DCE rate; extended result codes disabled. FACTORY DEFAULTS Type: Immediate Format: AT &Fn Example: AT &F8 Default: 1 Range: 1-9 Description: Loads factory defaults set n. FLOW CONTROL Type: Configuration Format: AT [cmds] \Gn [cmds] Example: AT G1 &M0 Description: Selects modem port flow control. Command Function » \G0 Flow control disabled. \G1 Flow control enabled. FLOW CONTROL CHARACTER - XOFF FROM TERMINAL Type: Register Format: AT [cmds] S45=n [cmds] Example: ATS45=22 Default: 19 Range: 0-127 Unit: ASCII Description: Sets the character the terminal sends to represent XOFF. FLOW CONTROL CHARACTER - XON FROM TERMINAL Type: Register Format: AT [cmds] S44=n [cmds] Example: ATS44=20 Default: 17 Range: 0-127 Unit: ASCII Description: Sets the character the terminal sends to represent XON. FLOW CONTROL CHARACTER - XOFF TO TERMINAL Type: Register Format: AT [cmds] S50=n [cmds] Example: ATS50=23 Default: 19 Range: 0-127 Unit: ASCII Description: Sets the character the modem sends to represent XOFF. FLOW CONTROL CHARACTER - XON TO TERMINAL Type: Register Format: AT [cmds] S49=n [cmds] Example: ATS49=21 Default: 17 Range: 0-127 Unit: ASCII Description: Sets the character the modem sends to represent XON. FLOW CONTROL MODE Format AT [cmds] S54=n [cmds] Example: ATS54=35 Default: 33 Range: 0 - 123 Unit: Bit-mapped Description: Controls flow control type and pass-through. Bit Value Function 1, 0 00 Flow control disabled. » 01 Bidirectional XON/XOFF flow control enabled. 10 CTS flow control by DCE enabled. 11 Bidirectional CTS/RTS flow control enabled. 2 0 Not used. 3 » 0 Flow control disabled. 1 Flow control enabled. 4 » 0 XON/XOFF signals trapped by local modem. 1 XON/XOFF passed through local modem. 6, 5 00 Flow control by DCE disabled. » 01 XON/XOFF flow control by DCE enabled. 10 RTS flow control by DCE enabled. 11 RTS flow control by DCE enabled. FLOW CONTROL TYPE Type: Configuration Format: AT [cmds] \Qn [cmds] Example: AT \Q5 Description: Sets type of flow control used by modem. Command Function \Q0 Flow control disabled. » \Q1 Bidirectional XON/XOFF flow control enabled. \Q2 CTS flow control by DCE enabled. \Q3 Bidirectional CTS/RTS flow control enabled. \Q4 Flow control by DCE disabled. » \Q5 XON/XOFF flow control by DCE enabled. \Q6 RTS flow control by DCE enabled. \Q7 RTS flow control by DCE enabled. FORCE RETRAIN Type: Immediate Format: AT [cmds] *RRn [cmds] Example: AT *RR14 O Description: Forces the modem to attempt to retrain to the selected speed. Command Function *RR0 Attempt 2400bps speed. *RR1 Attempt 4800bps speed. *RR2 Attempt 7200bps speed. *RR3 Attempt 9600bps speed. *RR4 Attempt 12Kbps speed. *RR5 Attempt 14.4Kbps speed. *RR6 Attempt 16.8Kbps speed. *RR7 Attempt 19.2Kbps speed. *RR8 Attempt 21.6Kbps speed. *RR9 Attempt 24Kbps speed. *RR10 Attempt 26.4Kbps speed. *RR11 Attempt 28.8Kbps speed. HANG UP MODE Type: Configuration Format: AT [cmds] Hn [cmds] Example: AT H3 O Description: Selects how the modem will hang up. Command Function » H2 Set hang up mode to normal on next ATH command. H3 Set hang up mode to fast on next ATH command. HELP SCREENS Type: Immediate Format: AT $H=xxxx Example: AT $H=MNP Description: Shows modem help screens. If a string is included as shown in the example, the modem will perform a search for the string; otherwise, the whole help section will be displayed. INACTIVITY TIMER Type: Register Format: AT [cmds] \Tn [cmds] Example: AT\T20 Default: 0 Range: 0-255 Unit: 1 minute Description: Sets the length of time that the modem does not receive information before it disconnects. INACTIVITY TIMER Type: Register Format: AT [cmds] S58=n [cmds] Example: AT S58=20 Default: 0 Range: 0-255 Unit: 1 minute Description: Sets the length of time that the modem does not receive information before it disconnects. LEASED LINE BACKUP NUMBER Type: Register Format: AT [cmds] S35=n [cmds] Example: AT S35=3 Description: Sets the memory location the modem will dial for DTR dialing and leased-line backup. LEASED LINE BACKUP RECOVERY DELAY Type: Register Format: AT [cmds] S28=n [cmds] Example: ATS28=5 Default: 15 Range: 0-255 Unit: 1 minute Description: After leased line failure, modem attempts to reconnect after specified delay. LEASED LINE BACKUP - RESTORAL OPTIONS Type: Configuration Format: AT [cmds] *DBn [cmds] Example: AT *DB0 D555-1212 Description: Selects what will initiate the restoral of a leased line connection. Command Function » *DB0 Modem will restore connection only when modem receives *LB or *LD. *DB1 Modem will restore connection automatically. LEASED LINE BACKUP - RESTORE Type: Configuration Format: AT [cmds] *LB [cmds] Example: AT *OR1 *LB Description: Commands the modem to attempt to restore the leased line connection, or to wait for a leased line call if in answer-only mode. LEASED LINE BACKUP - RESTORE MANUALLY Type: Configuration Format: AT [cmds] *LD [cmds] Example: AT *OR0 *LD Description: Commands the modem to dial the default number to restore the leased line connection. LEASED LINE TRANSMISSION LEVEL Type: Configuration Format: AT [cmds] *TLn [cmds] Example: AT *TL15 Default: 0 Range: 0 - 30 Unit: -1 dBm Description: Sets the signal level for transmission when in leased line mode. LEASED LINE TRANSMISSION LEVEL Type: Register Format: AT [cmds] S52=n [cmds] Example: AT S52=15 Default: 0 Range: 0 - 30 Unit: -1 dBm Description: Sets the signal level for transmission when in leased line mode. LINE TYPE Type: Configuration Format: AT [cmds] &Ln [cmds] Example: AT &L2 H1 DT555-1212 Description: Selects line type. Command Function » &L0 Switched line. &L1 2-wire leased line. &L2 4-wire leased line. LOCAL SERIAL PORT SPEED CHANGE ON PIN 23 Type: Configuration Format: AT [cmds] *FBn [cmds] Example: AT *FB1 Description: Selects whether a voltage transition on pin 23 will cause the modem to change the serial port speed. Command Function » *FB0 Pin 23 transition ignored. *FB1 Pin 23 negative causes modem to increase serial port speed; pin 23 positive causes modem to decrease serial port speed. LOCAL SERIAL PORT SPEED - CURRENT Type: Configuration Format: AT [cmds] S80=n [cmds] Example: AT %L3 S80=14 \J0 Description: Reports the current serial port speed. Command Function 1 300bps current speed. 2 600bps current speed. 3 1200bps current speed. 4 2400bps current speed. 5 4800bps current speed. 6 7200bps current speed. 7 9600bps current speed. 8 12Kbps current speed. 9 14.4Kbps current speed. 10 16.8Kbps current speed. 11 19.2Kbps current speed. 12 21.6Kbps current speed. 13 24Kbps current speed. 14 26.4Kbps current speed. 15 28.8Kbps current speed. 16 38.4Kbps current speed. 17 57.6Kbps current speed. 18 115.2Kbps current speed. LOCK SERIAL PORT Type: Configuration Format: AT [cmds] \Jn [cmds] Example: AT %L3 %B14 \J0 Description: Sets operation of serial port speed. Command Function » \J0 Serial speed locked. \J1 Serial speed follows connect speed. LOOPBACK TEST ON PIN 18 Type: Configuration Format: AT [cmds] *LAn [cmds] Example: AT*LA0 Description: Controls whether the modem will perform a local analog loopback test when pin 18 goes high. Command Function » *LA0 Pin 18 has no function. *LA1 Pin 18 going high causes the modem to perform local analog loopback test. LOOPBACK TEST ON PIN 21 Type: Configuration Format: AT [cmds] *RDn [cmds] Example: AT*RD0 Description: Controls whether the modem will perform a remote digital loopback test when pin 21 goes high. Command Function » *RD0 Pin 21 has no function. *RD1 Pin 21 going high causes the modem to perform remote digital loopback test. MAXIMUM BLOCK SIZE FOR TRANSMISSION Type: Configuration Format: AT [cmds] \An [cmds] Example: AT \A3 %C1 Description: Sets the maximum transmittable block size. Command Function \A0 MNP block size is 64 characters. \A1 MNP block size is 128 characters. \A2 MNP block size is 192 characters. » \A3 MNP block size is 256 characters. MAXIMUM BLOCK SIZE FOR TRANSMISSION Type: Register Format: AT [cmds] S63=n [cmds] Example: AT S63=3 %C1 Description: Sets the maximum transmittable block size. Command Function S63=0 MNP block size is 64 characters. S63=1 MNP block size is 128 characters. S63=2 MNP block size is 192 characters. » S63=3 MNP block size is 256 characters. PROTOCOL/SPEED Type: Configuration Format: AT [cmds] *MMn [cmds] Example: AT %E1 *MM12 Description: Selects the current protocol. Command Function *MM0 Selects all protocols. *MM1 Selects V.21 only. *MM2 Selects Bell 103 only. *MM3 Selects Bell 212 only. *MM5 Selects V.22bis only. *MM6 Selects V.27bis only. *MM8 Selects V.29 only. *MM10 Selects V.33 only. *MM11 Selects V.32bis only. *MM12 Selects V.34 only. PROTOCOL/SPEED Type: Configuration Format: AT [cmds] S88=n [cmds] Example: AT %E1 S88=12 Description: Selects the current protocol. Command Function S88=0 Selects all protocols. S88=1 Selects V.21 only. S88=2 Selects Bell 103 only. S88=3 Selects Bell 212 only. S88=5 Selects V.22bis only. S88=6 Selects V.27bis only. S88=8 Selects V.29 only. S88=10 Selects V.33 only. S88=11 Selects V.32bis only. S88=12 Selects V.34 only. PROTOCOL/SPEED - CURRENT Type: Configuration Format: AT [cmds] S91? [cmds] Example: AT %E1 S91? Description: Reports the current protocol. Value Meaning 0 Modem will select protocol automatically. 1 V.21 only selected. 2 Bell 103 only selected. 3 Bell 212 only selected. 5 V.22bis only selected. 6 V.27bis only selected. 8 V.29 only selected. 10 V.33 only selected. 11 V.32bis only selected. 12 V.34 only selected. REMOTE CONFIGURATION Type: Configuration Format: AT [cmds] %T=n [cmds] AT [cmds] D<#>%Tn [cmds] Example: AT &V2 %T=102475 AT D555-1212%T102475 Description: Initiates a remote configuration session. This command may follow a dial command, omitting the equal sign, to initiate remote configuration immediately on connection. %T with no parameter will quit the current session. REMOTE CONFIGURATION PASSWORD Type: Configuration Format: AT [cmds] %P=nnnn [cmds] Example: AT %P=102475 D555-1212 Default: N/A Range: 0-99999999, D, Description: Sets the security code for remote configuration sessions. If nnnn is omitted, the code will be cleared; if a D is given, remote configuration is disabled. REPORT INFORMATION Type: Immediate Format: AT [cmds] In [cmds] Example: AT I3 &V1 %V Description: Displays modem properties. Command Function I0 Reports modem model and speed. I1 Reports checksum number. I3 Reports firmware version. I4 Reports feature code. I5 Reports reason for last disconnect. REPORT INFORMATION AND CONFIGURATION PROFILE Type: Immediate Format: AT [cmds] &Vn [cmds] Example: AT I3 &V1 %V Description: Reports configuration profiles and other information. Command Function &V0 Report configuration profiles. &V1 Report connection status and internal modem information. &V2 Report active configuration profile. REPORT PRODUCT VERSION Type: Immediate Format: AT [cmds] %V [cmds] Example: AT I3 &V1 %V Description: Reports product version. REPORT SERIAL NUMBER Type: Immediate Format: AT [cmds] $V [cmds] Example: AT I3 &V1 $V Description: Reports product serial number. RESULT CODE MODE Type: Configuration Format: AT [cmds] *RCn [cmds] Example: AT *RC0 Description: Selects normal or Motorola result code numbering. Command Function » *RC0 Result code 15 is CONNECT 4800 and code 18 is CONNECT 9600 (standard). *RC1 Result code 11 is CONNECT 4800 and code 12 is CONNECT 9600 (Motorola). RESULT CODE MODE Type: Register Format: AT [cmds] S57=n [cmds] Example: AT S57=0 Description: Selects normal or Motorola result code numbering. Command Function » S57=0 Result code 15 is CONNECT 4800 and code 18 is CONNECT 9600 (standard). S57=1 Result code 11 is CONNECT 4800 and code 12 is CONNECT 9600 (Motorola). RETRAIN SENSITIVITY Type: Configuration Format: AT [cmds] %Rn [cmds] Example: AT &C3 %R1 Description: Sets how poor line conditions must be before the modem will initiate a retrain. Command Function » %R0 Modem will not initiate retrain. %R1 Modem will initiate retrain when the Bit Error Rate exceeds 10-5 for eight seconds, or for one second in V.22bis mode. %R2 Modem will initiate retrain when the Bit Error Rate exceeds 10-4 for eight seconds, or for one second in V.22bis mode. %R3 Modem will initiate retrain when the Bit Error Rate exceeds 10-3 for eight seconds, or for one second in V.22bis mode. RETRAIN SENSITIVITY Type: Register Format: AT [cmds] S53=n [cmds] Example: AT &C3 S53=1 Description: Sets how poor line conditions must be before the modem will initiate a retrain. Command Function » S53=0 Modem will not initiate retrain. S53=4 Modem will initiate retrain when the Bit Error Rate exceeds 10-5 for eight seconds, or for one second in V.22bis mode. S53=8 Modem will initiate retrain when the Bit Error Rate exceeds 10-4 for eight seconds, or for one second in V.22bis mode. S53=12 Modem will initiate retrain when the Bit Error Rate exceeds 10-3 for eight seconds, or for one second in V.22bis mode. RI SIGNAL Type: Configuration Format: AT [cmds] \Rn [cmds] Example: AT \R0 Q0 Description: Controls the behavior of the Ring Indicator signal. Command Function \R0 RI signal high during rings, and forced high for duration of call. » \R1 RI signal high during rings only. SECURITY - AUTOCALLBACK DELAY Type: Register Format: AT [cmds] S78=n [cmds] Example: AT S78=10 Default: 30 Range: 0-255 Unit: 1 second Description: Configures how long the modem will wait to execute the autocallback sequence after an incoming call is detected. SECURITY - CALLBACK DELAY Type: Register Format: AT [cmds] S74=n [cmds] Example: AT S74=30 Default: 15 Range: 0-255 Unit: 1 second Description: Configures how long the modem will wait to execute a callback sequence after the user has disconnected. SECURITY - CALLBACK NUMBER Type: Configuration Format: AT [cmds] $Cn=<#> [cmds] Example: AT $L0=3 $C0=1(303)443-3388 Description: Sets the callback number for user number n. SECURITY - CALLBACK RETRY Type: Register Format: AT [cmds] S75=n [cmds] Example: AT S75=5 Default: Unidentified Range: 0-255 Unit: 1 redial Description: Sets how many times the modem will attempt to execute a callback if the first call fails. SECURITY - CALLBACK RETRY DELAY Type: Register Format: AT [cmds] S76=n [cmds] Example: AT S76=60 Default: 15 Range: 0-255 Unit: 1 second Description: Configures how long the modem will wait to execute another callback sequence after one has failed. SECURITY CHECK Type: Immediate Format: AT [cmds] $D? [cmds] AT [cmds] $E? [cmds] Example: AT $DR $D? Description: Reports whether security is enabled. SECURITY - DELETE USER Type: Configuration Format: AT [cmds] $Rn [cmds] Example: AT $R3 Description: Deletes the user number n. User IDs 0 and 1 cannot be deleted. SECURITY DISABLE Type: Immediate Format: AT [cmds] $D=xxxx Example: AT $D=MicroHouse Description: Disables security. A password must be specified. SECURITY ENABLE - HIGH SECURITY Type: Immediate Format: AT [cmds] $EH=xxxx Example: AT $EH=SuperSecret Description: Enables security. The superuser password must be specified. SECURITY ENABLE - LOW SECURITY Type: Immediate Format: AT [cmds] $E=xxxx Example: AT $E=MicroHouse Description: Enables security. A password must be specified. SECURITY - FAILED LOGIN ATTEMPT COUNTERS Type: Configuration/Immediate Format: AT [cmds] $Mn [cmds] Example: AT $M $M* Description: Displays or clears the counters for failed login attempts. If a number is specified, the counter will be reset for that user. If an * follows, all counters will be cleared. If no character follows, the counters will be displayed. SECURITY - FAILED LOGIN ATTEMPT MAXIMUM Type: Register Format: AT [cmds] S77=n [cmds] Example: AT S77=3 Default: Unidentified Range: 0-255 Unit: 1 attempt Description: Sets the maximum number of failed logins the modem will accept until it disconnects. SECURITY - HIGH SECURITY PASSWORD Type: Configuration Format: AT [cmds] $Pn=xxxx$xxxx Example: AT $P0=SuperSecret$SuperSecret Description: Sets the password for user number n to xxxx. User number 0 is the superuser. The password must be between 4 and 34 characters inclusive. The $ character may not be used. SECURITY - HIGH SECURITY RESET Type: Configuration Format: AT [cmds] $F=xxxx$xxxx Example: AT $F=SuperSecret$SuperSecret Description: Resets the high security options to their factory defaults. SECURITY LEVEL Type: Configuration Format: AT [cmds] $Lm=n [cmds] Example: AT $L0=3 $C0=1(303)443-3388 Description: Sets the security level for user number m. Command Function $Lm=1 Modem prompts for a user ID and password on connection. $Lm=2 Modem prompts for a user ID and password on connection, then modem begins callback sequence. $Lm=3 Modem prompts for a user ID and password on connection, then modem begins callback sequence. When modem reconnects, it prompts for a user ID and password again. SECURITY LOGIN Type: Immediate Format: AT [cmds] $n=xxxx [cmds] Example: AT $1=MicroHouse Description: Logs into modem, from the local machine or remotely. SECURITY LOGOUT Type: Immediate Format: AT [cmds] $$ [cmds] Example: AT $$ Description: Logs out from the modem. SECURITY - LOW SECURITY PASSWORD Type: Configuration Format: AT [cmds] $S=xxxx Example: AT $S=MicroHouse Description: Sets an empty login password to xxxx. SECURITY - LOW SECURITY PASSWORD CHANGE Type: Configuration Format: AT [cmds] $C=xxxx,yyyy Example: AT $CMicroHouse=Fubar Description: Changes the password xxxx to yyyy. If a - is given for yyyy, the password will be deleted. SECURITY - LOW SECURITY RESET Type: Configuration Format: AT [cmds] $DR [cmds] Example: AT $DR $D? Description: Resets the low security options to their factory defaults. SECURITY OPTIONS Type: Configuration Format: AT [cmds] $Wm=n [cmds] Example: AT $W0=3 $C0=1(303)443-3388 Description: Controls what features a remote user has access to. Command Function $W0 Remote users can access no extra features. $W1 Remote users can change their passwords and callback numbers. $W2 Remote users can change their passwords and callback numbers and login as the superuser. SECURITY - PASSWORD TIME Type: Register Format: AT [cmds] S73=n [cmds] Example: AT S73=10 Default: Unidentified Range: 0-255 Unit: 1 second Description: Configures how long the modem will wait for a password when in secure mode. SECURITY - REPORT SUPERUSER STATUS Type: Immediate Format: AT [cmds] $Sn? [cmds] Example: AT $S3? Description: Reports whether user n has superuser status. SECURITY - REPORT USER SETTINGS Type: Immediate Format: AT [cmds] $In [cmds] Example: AT $I3 Description: Reports security level and callback number for user n. SECURITY - REPORT USERS SETTINGS Type: Immediate Format: AT [cmds] $IBn [cmds] Example: AT $IB11 Description: Reports security level and callback number for the ten users beginning at user number n. SECURITY - SUPERUSER MODE Type: Immediate Format: AT [cmds] $S=xxxx [cmds] Example: AT $S=SuperSecret Description: Attempts to enter superuser mode. STATUS REGISTER BIT Type: Configuration Format: Write: AT [cmds] Sn.m=0 or 1 [cmds] Read: AT [cmds] Sn.m=? [cmds] Example: AT S40.4=1 S51.3? Description: Sets/clears or reads bit m of register n. STATUS REGISTER HEXADECIMAL Type: Configuration Format: Write: AT [cmds] Sn^=hh [cmds] Read: AT [cmds] Sn?^ [cmds] Example: AT S99^=3F S99?^ Description: Sets register n to hexadecimal number hh or displays register n in hexadecimal. STORE PHONE NUMBER IN NVRAM Type: Configuration Format: AT [cmds] *CNn,<#> Example: AT *AU4 *CN4,1(303)443-3388 Description: Stores a phone number in the modem’s memory. SWITCHED LINE TRANSMISSION LEVEL Type: Configuration Format: AT [cmds] %Zn [cmds] Example: AT %R1 %Z1 Description: Sets the signal level for transmission. Command Function » %Z0 Permissive transmission level (level fixed at -9dBm.) %Z1 Programmable transmission level (level controlled by exterior resistor, or -12dBm if absent.) SWITCHED LINE TRANSMISSION LEVEL Type: Configuration Format: AT [cmds] *TDn [cmds] Example: AT *TD15 Default: 9 Range: 9 - 30 Unit: -1 dBm Description: Sets the signal level for transmission when in switched line mode. TALK/DATA MODE Type: Immediate Format: AT [cmds] *DAn [cmds] Example: AT *DA1 Description: Selects talk or data mode. Command Function » *DA0 Talk mode enabled. *DA1 Data mode enabled. TEST MODE - BIDIRECTIONAL ANALOG LOOPBACK TEST Type: Configuration Format: AT [cmds] *ANn [cmds] Example: AT *AN1 Description: Controls the bidirectional local analog loopback test mode. Command Function » *AN0 End loopback test. *AN1 Begin loopback test. TEST MODE - BIDIRECTIONAL DIGITAL LOOPBACK TEST Type: Configuration Format: AT [cmds] *DGn [cmds] Example: AT *DG1 Description: Controls the bidirectional local digital loopback test mode. Command Function » *DG0 End loopback test. *DG1 Begin loopback test. TEST MODES Format AT [cmds] S34=n [cmds] Example: ATS34=4 Default: 0 Range: 0 - 15 Unit: Bit-mapped Description: Initiates and controls loopback tests. Bit Value Function 0 » 0 End bidirectional local analog loopback test. 1 Begin bidirectional local analog loopback test. 1 » 0 End bidirectional local digital loopback test. 1 Begin bidirectional local digital loopback test. 2 » 0 Pin 18 has no function. 1 Pin 18 going high causes the modem to perform local analog loopback test. 3 » 0 Pin 21 has no function. 1 Pin 21 going high causes the modem to perform remote digital loopback test. TEST STATUS Format AT [cmds] S16=n [cmds] Example: ATS16=32 Default: Read-only Range: 0 - 255 Unit: Bit-mapped Description: Contains status of loopback tests. Bit Value Function 0 0 Local analog loopback test not in progress. 1 Local analog loopback test in progress. 1 0 Remote analog loopback test not in progress. 1 Remote analog loopback test in progress. 2 0 Local digital loopback test not in progress. 1 Local digital loopback test in progress. 3 0 Remotely requested remote digital loopback test not in progress. 1 Remotely requested remote digital loopback test in progress. 4 0 Locally requested remote digital loopback test not in progress. 1 Locally requested remote digital loopback test in progress. 5 0 Remote digital loopback with local self-test not in progress. 1 Remote digital loopback with local self-test in progress. 6 0 Local analog loopback with local self-test not in progress. 1 Local analog loopback with local self-test in progress. 7 0 Remote analog loopback with local self-test not in progress. 1 Remote analog loopback with local self-test in progress. V.25bis OPTIONS Format AT [cmds] S30=n [cmds] Example: ATS30=4 Default: 0 Range: 0 - 230 Unit: Bit-mapped Description: Controls V.25bis character set, VAL response, NRZ/NRZI, and communications mode. Bit Value Function 0 0 Not used. 1 » 0 Use ASCII character set. 1 Use EBCDIC character set. 2 » 0 VAL response enabled. 1 VAL response disabled. 3 0 Not used. 4 0 Not used. 5 » 0 Use NRZ mode. 1 Use NRZI mode. 7, 6 » 00 V.25bis command set disabled. 01 V.25bis bisynchronous command, synchronous connect mode. 10 V.25bis SDLC command, synchronous connect 11 mode. V.25bis asynchronous command, synchronous connect mode. V.32 HANDSHAKE OPTIONS Type: Configuration Format: AT [cmds] *FTn [cmds] Example: AT *FT0 Description: Shortens V.32 and V.32bis handshake time. Command Function » *FT0 Normal handshake sequence. *FT1 Training time is shortened by 2 seconds in V.32 and V.32bis modes. V.34 OPTIONS Format: AT [cmds] S95=n [cmds] Example: ATS95=240 Default: 240 Range: 0 - 240 Unit: Bit-mapped Description: Controls non-linear coding, pre-emphasis, shaping, and pre-coding. Bit Value Function 3 - 1 0 Not used. 4 0 Non-linear coding disabled. » 1 Non-linear coding enabled. 5 0 Pre-emphasis disabled. » 1 Pre-emphasis enabled. 6 0 Constellation shaping disabled. » 1 Constellation shaping enabled. 7 0 Pre-coding disabled. » 1 Pre-coding enabled. V.34 OPTIONS Format: AT [cmds] S96=n [cmds] Example: ATS96=160 Default: 160 Range: 0 - 160 Unit: Bit-mapped Description: Controls TX level deviation and asymmetric bit rates. Bit Value Function 4 - 0 0 Not used. 5 0 Asymmetric bit rates disabled. » 1 Asymmetric bit rates enabled. 6 0 Not used. 7 0 TX level deviation disabled. » 1 TX level deviation enabled. V.34 RETRAIN SENSITIVITY Type: Configuration Format: AT [cmds] *THn [cmds] Example: AT *MM12 *TH1 Description: Sets how poor line conditions must be before the modem will initiate a retrain when in V.34 mode. Command Function » *TH0 Modem will initiate retrain when the Bit Error Rate exceeds 10-6. *TH1 Modem will initiate retrain when the Bit Error Rate exceeds 10-4. *TH2 Modem will initiate retrain when the Bit Error Rate exceeds 10-2. V.34 SPLIT BAUD MODE Type: Configuration Format: AT [cmds] *ASn [cmds] Example: AT *AS1 Description: Controls V.34 split baud mode. Command Function *AS0 V.34 split baud mode disabled. *AS1 V.34 split baud mode enabled. V.42 NEGOTIATION MODE Type: Configuration Format: AT [cmds] \Mn [cmds] Example: AT \M0 H1 DT555-1212 Description: Selects how the modem negotiates V.42 modulation during handshaking. Command Function \M0 Normal handshaking enabled. » \M1 Fast handshaking enabled. XON/XOFF PASS-THROUGH Type: Configuration Format: AT [cmds] \Xn [cmds] Example: AT \X7 O Description: Selects whether XON/XOFF signals are sent to remote modem. Command Function » \X0 XON/XOFF signals trapped by local modem. \X1 XON/XOFF passed through local modem. Proprietary V.25bis Command Set CONNECTION Type: Response Format: CNX@nnnnnBPS Description: A connection has been successfully established at the rate specified. DISPLAY CURRENT COMMAND STATUS Type: Immediate Format: RLOnnn;xx Example: RLO112;2 Description: Displays current setting of modem commands. If no parameters are given, all commands will be displayed. Otherwise, xx addresses will be displayed beginning at nnn. DISPLAY LINKED NUMBERS Type: Immediate Format: RLL Example: RLL Description: Requests the modem to return the list of linked stored numbers. DISPLAY STORED NUMBERS Type: Immediate Format: RLN Example: RLN Description: Requests the modem to return the list of stored numbers. INVALID Type: Response Format: INVxx Example: INVCU Description: The modem was issued an improper command. The two letters following indicate the error. Code Meaning INVCU An error occurred in transmission. INVMS The command was too long or was followed by a semicolon. INVPS An improper number parameters were issued. INVPV The parameters were ignored or invalid. LINK STORED NUMBERS Type: Configuration Format: PRLm;n Example: PRL1;2 Description: Links memory location m to memory location n. If a call to location m fails, the number at n will be dialed. REDIAL Type: Immediate Format: CRRn Example: CRR4 Description: Redials the last number dialed up to n times. REPORT PRODUCT VERSION Type: Immediate Format: RLV Example: RLV Description: Reports product version. RESET MODEM TO STORED PROFILE Type: Immediate Format: PRPn Example: PRP3 Description: Resets modem to stored profile n. SET OPTIONS Type: Configuration Format: PROnnn;aa;bb;cc... Example: PRO112;02;01 Description: Sets various options. The first number is the first address to set. Following parameters set the addresses, starting with nnn and progressing. In this example, address 112 would be set to 02 and address 113 would be set to 01. STORE ACTIVE PROFILE Type: Immediate Format: PRK Example: PRK Description: Writes the values for the current profile into the non-volatile RAM.