3COM CORPORATION COURIER V.32/PC Card Type Modem (asynchronous) Chip Set U.S. Robotics Maximum Data Rate 14.4Kbps Data Bus Unidentified Data Modulation Protocol Unidentified Error Correction/Compression Unidentified 54154 USER CONFIGURABLE SETTINGS Setting Label Position DTR normal SW1/1 Off DTR forced high SW1/1 On Verbal result codes SW1/2 Off Numeric result codes SW1/2 On Enable result codes displayed SW1/3 On Disable result codes displayed SW1/3 Off Local echo enabled SW1/4 Off Local echo disabled SW1/4 On Auto answer disabled SW1/5 On Auto answer enabled SW1/5 Off CD signal normal SW1/6 Off CD signal forced high SW1/6 On Display result codes in originate and answer SW1/7 Off mode Display result codes in originate mode only SW1/7 On Smart mode enabled SW1/8 On Dumb mode enabled SW1/8 Off Normal operation enabled SW1/9 On Escape sequence enabled SW1/9 Off Restore NVRAM defaults SW1/10 Off Restore factory defaults SW1/10 On Proprietary AT Command Set ABORT Type: Immediate Format: Any key Description: Aborts answering/originating a call; modem hangs up. ANSWER Type: Immediate Format: AT [cmds] A Description: Enables manual answer mode, the modem goes off-hook; pressing any key will abort. ANSWER SEQUENCE Type: Configuration Format: AT [cmds] Bn [cmds] Description: Selects the answer sequence the modem will use Command Function B0 V.32 mode/ITU-T answer sequence enabled B1 HST mode/Bell answer tone enabled ATTENTION Type: Immediate Format: AT [cmds] Description: Tells the modem that a command follows or use alone to test OK result code BIT-MAPPED REGISTER S13 Format AT [cmds] S13=n [cmds] Default: 0 Range: 0-255 Unit: Bit-mapped Description: Controls DTR reset, DTR dialing, reset dialing, HST modulation, and MNP3. Bit Value Function 0 0 DTR normal 1 Reset on low DTR 1 0 Normal auto answer operation 1 When ring is received, enter originate and listen for answer tone 2 0 Pause 250msec. Before displaying result codes 1 Immediate result code display 3 0 DTR dialing disabled 1 DTR dialing enabled 4 0 Reset dialing disabled 1 Reset dialing enabled 5 0 HST modulation enabled 1 HST modulation disabled 6 0 MNP 3 enabled 1 MNP 3 disabled 7 0 Hardware reset disabled 1 Hardware reset enabled BIT-MAPPED REGISTER S15 Format: AT [cmds] S15=n [cmds] Default: 0 Range: 0-255 Unit: Bit-mapped Description: Controls HST high frequency equalization, online fallback, back channel, non-error-correcting mode buffer, MNP4, custom applications and MNP compliance. Bit Value Function 0 0 HST high frequency equalization enabled 1 HST high frequency equalization disabled 1 0 Online fallback enabled 1 Online fallback disabled 2 0 300bps back channel enabled 1 300bps back channel disabled 3 0 Non-error-correcting mode transmit buffer set to 1.5KB 1 Non-error-correcting mode transmit buffer set to 128 bytes 4 0 MNP 4 enabled 1 MNP 4 disabled 5 0 Custom applications only 1 Custom applications only 6 0 MNP normal 1 MNP adjusted for non compliant modems BIT-MAPPED REGISTER S27 Format: AT [cmds] S27=n [cmds] Default: 0 Range: 0-191 Unit: Bit-mapped Description: Controls V.21, V.32 encoding and modulation, and high speed rate shift Bit Value Function 0 0 V.21 disabled 1 V.21 enabled 1 0 V.32 non-trellis coding disabled 1 V.32 non-trellis coding enabled 2 0 V.32 modulation enabled 1 V.32 modulation disabled 3 - 5 000 Not used 6 0 19.2Kbps enabled. High speed rate shift needs to be enabled. 1 38.4Kbps enabled. High speed rate shift needs to be enabled. 7 0 High speed rate shift disabled 1 High speed rate shift enabled BREAK LENGTH Type: Register Format: AT [cmds] S21=n [cmds] Default: 10 Range: 0-255 Unit: 10 ms Description: Sets the length of error control mode breaks sent from DCE to DTE CLOCK Type: Configuration Format: AT [cmds] Kn [cmds] Description: Displays connection duration or real time Command Function K0 Connection duration displayed in ATI3 K1 Real time displayed in ATI3. To set clock (military time) use ATI3=HH:MM:SSK1. DATA SET READY (DSR) Type: Configuration Format: AT [cmds] &Sn [cmds] Description: Selects DSR options Command Function &S0 DSR forced high &S1 DSR controlled by modem &S2 DSR toggled, CTS follows CD &S3 DSR toggled DIAL Type: Immediate Format: AT [cmds] D<#> [cmds] Example: ATDT 443-3388,,,1111; Description: Dials telephone number according to any modifiers included in the string Note: Any combination of modifiers can be used to produce the desired dial functions in sequence. Command Function P Pulse dialing enabled T Tone dialing enabled , Dialing paused for 2 seconds ; Modem returned to command state after dialing. Can only be placed at the end of the dial command. " Dials letters as if they were numbers; ATDT"GOMICRO" ! Flash function initiated @ Dial, wait for quiet answer, then continue to execute the rest of the dial string W Dial, wait for second dial tone, then continue to execute the rest of the dial string R Answer mode enabled; originate mode disabled following handshake initiation. DIAL - STORED NUMBER Type: Immediate Format: AT [cmds] DSn [cmds] Description: Dial stored number from memory location n DISCONNECT BUFFER DELAY Type: Register Format AT [cmds] S38=n [cmds] Default: 0 Range: 0-255 Unit: 1 second Description: Sets maximum duration allowed during buffered data calls for modem to perform clearing functions after losing carrier-signal or receiving a clear call signal from the remote modem and before initiating hang-up process. DSR DELAY Type: Register Format: AT [cmds] S24=n [cmds] Default: 25 Range: 0-255 Unit: .1 second Description: Sets the length of the DSR pulse signal ECHO Type: Configuration Format: AT [cmds] En [cmds] Description: Controls echo function; display keyboard commands when enabled. Command Function E0 Echo function disabled E1 Echo function enabled ECHO - ON-LINE Type: Configuration Format: AT [cmds] Fn [cmds] Description: Selects whether data sent while in data mode are echoed Command Function F0 Local echo enabled F1 Local echo disabled ESCAPE SEQUENCE Type: Immediate Format: +++AT [cmds] Description: Initiates the escape sequence and returns the modem to the on-line command state if it receives three escape characters set in S2 within the time allotted by S12. Note: Do not precede this command with AT. FLOW CONTROL CHARACTER - XOFF Type: Register Format: AT [cmds] S23=n [cmds] Default: 19 Range: 11-127 Unit: ASCII Description: Sets the character used to represent XOFF FLOW CONTROL CHARACTER - XON Type: Register Format: AT [cmds] S22=n [cmds] Default: 17 Range: 11-127 Unit: ASCII Description: Sets the character used to represent XON FLOW CONTROL TYPE Type: Configuration Format: AT [cmds] &Hn [cmds] Description: Sets type of flow control used by modem Command Function &H0 Flow control disabled &H1 CTS/RTS flow control enabled &H2 XON/XOFF flow control enabled &H3 CTS/RTS and XON/XOFF flow control enabled FLOW CONTROL TYPE Type: Configuration Format: AT [cmds] &Rn [cmds] Description: Controls receive data hardware flow control and RTS signals Command Function &R0 Delay CTS after RTS. See S26 on length of time. &R1 Modem ignores RTS &R2 Received data to DTE when RTS is on FLOW CONTROL PASSTHROUGH Type: Configuration Format: AT [cmds] &In [cmds] Description: Allows modem to act on, then transmit XON/XOFF characters. Command Function &I0 Software flow control disabled &I1 XON/XOFF passthrough enabled &I2 XON/XOFF passthrough disabled &I3 ENQ/ACK enabled in host mode &I4 ENQ/ACK enabled in terminal mode &I5 XON/XOFF passthrough disabled in error correction mode GUARD TONE Type: Configuration Format: AT [cmds] &Gn [cmds] Description: Commands the modem to transmit a guard tone Note: Used primarily for international data transmission Command Function &G0 Guard tone disabled &G1 550Hz guard tone enabled &G2 1800Hz guard tone enabled HOOK CONTROL Type: Immediate Format: AT [cmds] Hn [cmds] Description: Selects whether the modem is on-hook or off-hook Command Function H0 Modem commanded to go on-hook (hang-up) H1 Modem commanded to go off-hook (pick-up) LIST AMPERSAND COMMANDS Type: Immediate Format: AT [cmds] &$ [cmds] Description: Displays ampersand (&) commands LIST DIAL COMMANDS Type: Immediate Format: AT [cmds] D$ [cmds] Description: Displays dial commands LIST S-REGISTERS Type: Immediate Format: AT [cmds] S$ [cmds] Description: Displays the S-registers ON-LINE Type: Immediate Format: AT [cmds] O [cmds] Description: Returns to on-line command (data transmission) mode. Note: The O command must be placed at the end of the command string. ON-LINE HELP Type: Immediate Format: AT [cmds] $ [cmds] Description: On-line help; displays basic command list. PAUSE Type: Immediate Format: AT [cmds] / (slash) [cmds] Description: 125 msec delay before proceeding with dial string or command PULSE DIALING Type: Configuration Format: AT [cmds] P [cmds] Description: Enables pulse dialing Note: This command can be duplicated with the P modifier in the D (Dial) command. PULSE DIALING RATIO Type: Configuration Format: AT [cmds] &Pn [cmds] Description: Selects pulse dial make/break ratio Command Function &P0 39/61ms at 10pps (North America) &P1 33/67ms at 10pps (Europe) RECEIVE-ONLY Type: Configuration Format: AT [cmds] Cn [cmds] Description: Sets receive-only; used if modem is attached to additional monitoring-only systems Command Function C0 Disables transmitter C1 Enables transmitter REPEAT COMMAND STRING Type: Configuration Format: AT [cmds] > [cmds] Example: AT>DT5551212 or ATDT5551212> Description: Causes modem to repeat command string until a keyboard key is pressed Note: If used before or after the ATD command, the modem will redial the number until a connection is established or a maximum of ten attempts is reached. REPEAT PREVIOUS COMMAND Type: Immediate Format: A/ Description: Repeats previous command; mainly used for redial. Note: Do not precede this command with AT, or follow it with . RTS/CTS DELAY Type: Register Format: AT [cmds] S26=n [cmds] Default: 1 Range: 0-255 Unit: .1 second Description: Sets the length of time between RTS and CTS REPORT INFORMATION Type: Immediate Format: AT [cmds] In [cmds] Description: Displays information requested Command Function I0 Reports product code I1 Reports ROM checksum I2 Reports RAM checksum I3 Reports connection duration and real time I4 Reports current command settings I5 Reports NVRAM settings I6 Reports link diagnostics I7 Reports product configuration RESULT CODES Type: Configuration Format: AT [cmds] Qn [cmds] Description: Enables modem to send result codes to the DTE Command Function Q0 Result code sending enabled Q1 Result code sending disabled RESULT CODE FORMAT Type: Configuration Format: AT [cmds] Vn [cmds] Description: Selects word or numeric format for information-text and result codes Command Function V0 Numeric format enabled V1 Verbose (word) format enabled SELECT CALL PROGRESS RESULT CODES Type: Configuration Format: AT [cmds] Xn [cmds] Description: Enables selection of tone detection and associated result code format options Command Function X0 Busy and dial tone detection disabled; result codes 0-4 enabled. X1 Busy and dial tone detection disabled; result codes 0-5, 10, 13, and 18 enabled X2 Busy tone detection disabled, dial tone detection enabled; result codes 0-6, 10, 13, and 18 enabled; also adaptive dialing, and fast dialing enabled. X3 Busy tone detection enabled, dial tone detection disabled; result codes 0-5, 7-18 enabled; also adaptive dialing, wait for second dial tone, and wait for answer enabled. X4 Busy and dial tone detection enabled; result codes 0-10, 13, and 18 enabled; also adaptive dialing, wait for second dial tone, wait for answer, and fast dialing enabled. X5 Busy tone detection enabled, dial tone detection disabled; result codes 0-5, 7-18 enabled; also adaptive dialing, wait for second dial tone, and wait for answer enabled. X6 Busy and dial tone detection enabled; result codes 0-18 enabled; also adaptive dialing, wait for second dial tone, wait for answer, and fast dialing enabled. X7 Busy and dial tone detection enabled; result codes 0-11, 13, and 18 enabled; also adaptive dialing, wait for second dial tone, wait for answer, and fast dialing enabled. Note: Valid numeric result codes; 0-8, 10-13, and 18. SOFT RESET Type: Immediate Format: AT [cmds] Z [cmds] Description: Restores modem software default profile SPEAKER MODE Type: Configuration Format: AT [cmds] Mn [cmds] Description: Selects various speaker options Command Function M0 Speaker disabled M1 Speaker enabled until carrier signal detected M2 Speaker enabled M3 Speaker enabled following dialing, then disabled after carrier signal detected. SPEAKER VOLUME Type: Configuration Format: AT [cmds] Ln [cmds] Description: Controls speaker volume Command Function L0 Low volume setting L1 Low volume setting L2 Medium volume setting L3 Highest volume setting STATUS-REGISTER Type: Configuration Format: Read: AT [cmds] Sn? [cmds] Write: AT [cmds] Sn=x [cmds] Description: Writes to or reads from a specified register Command Function Sn.b=x Write to register bit b using values 0 (off) and 1 (on) for x TEST MODES Type: Configuration Format: AT [cmds] S16=n [cmds] Description: Controls loopback tests, analog, digital, remote digital, and self tests. Command Function S16=0 Testing disabled S16=1 Local digital loopback enabled S16=2 Dial test (Factory testing only) S16=4 Test pattern enabled (transmitted on CONNECT, either on answering or originate) S16=5 Local analog loopback and test pattern enabled S16=8 Remote digital loopback enabled TONE DIALING Type: Configuration Format: AT [cmds] T [cmds] Description: Enables tone dialing mode Note: This command can be duplicated with the T modifier in the D (Dial) command. V.32 - HANDSHAKE TIME Type: Register Format: AT [cmds] S28=n [cmds] Default: 8 Range: 0-255 Unit: .1 second Description: Sets length of V.32 handshake