3COM CORPORATION DIRECT 2400 Card Type Modem (asynchronous) Chip Set U.S.Robotics Maximum Data Rate 2400bps Data Bus External Data Modulation Protocol Unidentified [Image] CONNECTIONS Function Label Function Label Line out/in - CN1 DC power - Unidentified CN4 Unidentified Line in/out - CN2 Power switch - SW1 Unidentified Unidentified RS-232/422 - Unidentified CN3 USER CONFIGURABLE SETTINGS Setting Label Position DTR normal SW1/1 On DTR Forced high SW1/1 Off Verbose result codes SW1/2 Off Numeric result codes SW1/2 On Result codes enabled SW1/3 On Result codes disabled SW1/3 Off Commands displayed SW1/4 Off Commands not displayed SW1/4 On Auto-answer mode enabled SW1/5 Off Auto-answer mode disabled SW1/5 On CD signal forced high SW1/6 On CD signal normal SW1/6 Off RJ-11 jack SW1/7 Off RJ-12, RJ-13 jack SW1/7 On Smart mode SW1/8 On Dumb mode SW1/8 Off DIAGNOSTIC LED(S) LED Color Status Condition Left Green On Modem is in data mode Left Green Off Modem is not data mode Left Red On Modem is in analog loopback test mode Left Red Blinking Power on/self-test in progress Right Green On Carrier signal detected/ready to send data Right Green Off Carrier signal not detected/not ready to send data Right Red Off Modem is not receiving data/not displaying result codes Right Red Blinking Modem is receiving data/display result codes 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 ITU-T answer sequence enabled B1 Bell answer sequence enabled ATTENTION Type: Immediate Format: AT [cmds] Description: Tells the modem that a command follows or use alone to test OK result code 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. 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. 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. 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 HELP SCREEN - CONTROLS Type: Immediate Format: C, K or S Description: Cancel; or stop/restart scrolling of help screens Command Function C Cancel display of help screen K Cancel display of help screen S Stop/restart scrolling of help screens 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 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. PRODUCT CODE Type: Register Format: AT [cmds] S14 [cmds] Description: Stores product code, displayed in ATI0. 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 . 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 test (OK or ERROR, followed by OK) I3 Reports connection duration and real time I4 Reports current command settings 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 0-5 and 10 enabled. X1 Busy and dial tone detection disabled; result codes 0-5 and 10 enabled X2 Busy tone detection disabled, dial tone detection enabled; result codes 0-6 and 10 enabled; also adaptive dialing, and fast dialing enabled. X3 Busy tone detection enabled, dial tone detection disabled; result codes 0-5, 7-10 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 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, 7-12 enabled; also adaptive dialing, wait for second dial tone, and wait for answer enabled. X6 Busy and dial tone detection enabled; result codes 0-12 enabled; also adaptive dialing, wait for second dial tone, wait for answer, and fast dialing enabled. Note: Valid numeric result codes; 0-8, and 10-12. SOFT RESET Type: Immediate Format: AT [cmds] Zn [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. 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 TEST MODES Type: Configuration Format: AT [cmds] S16=n [cmds] Description: Controls loopback tests, analog, digital, dial and self tests. Command Function S16=0 Testing disabled S16=1 Local analog 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 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.