ACER AMERICA CORPORATION MODEM 2424 Modem Type Data (synchronous/asynchronous) Maximum Data Rate 2400bps Data Bus External Data Modulation Protocol Bell 103A/212A, 201 ITU-T V.22, V.22bis Error Correction/Compression MNP4 [Image] CONNECTIONS Purpose Location Purpose Location Line out CN1 DC power CN4 Line in CN2 Power switch SW6 RS-232C CN3 OFF HOOK Status SW4 » Talk mode Off Data mode On ANSWER MODE Status SW3 » Originate Off Answer On MODEM SPEED Speed SW2 » 2400bps Off 1200bps On AUTO TEST Status SW1 » Disabled Off Enabled On COMMAND SET DISABLE Status SW5/1 AT command set disabled On AT command set enabled Off LINE TYPE Status SW5/2 Force leased line On Normal operation Off ERROR CORRECTION Status SW5/3 Disabled On Enabled Off ECHO AND RESULT CODE Status SW5/4 Disabled On Normal operation Off AUTO ANSWER Status SW5/5 Set to one ring On Normal operation Off SYNCHRONOUS TRANSMIT CLOCK SOURCE Status SW5/6 DTE generates clock On Normal operation Off SYNCRONOUS DATA MODE Status SW5/7 Enabled On Normal operation Off DSR AND CTS Status SW5/8 Force high On Normal operation Off DIAGNOSTIC LED(S) LED Status Condition EF On Error correction enabled EF Off Error correction disabled HS On Modem is operating at 2400bps HS Off Modem is operating at 1200bps or 300bps AA On Auto answer enabled AA Off Auto answer disabled CD On Carrier signal detected CD Off Carrier signal not detected OH On Modem is off-hook OH Off Modem is on-hook RD On Modem is receiving data RD Off Modem is not receiving data SD On Modem is transmitting data SD Off Modem is not transmitting data TR On DTR signal is high TR Off DTR signal is low MR On Power on MR Off Power off MR Blinking Modem is performing self-test Proprietary AT Command Set ACCEPT RELIABLE MODE Type: Immediate Format: AT [cmds] \Un Example: AT \U Description: Accepts remote modem’s request for reliable link. 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-RELIABLE FALLBACK CHARACTER Type: Register Format: AT [cmds] S20=n [cmds] Example: ATS20=20 Default: 0 Range: 0-127 Unit: ASCII Description: Sets the character used as the auto-reliable fallback character. S20=0 will disable this function. AUTO-RETRAIN Type: Configuration Format: AT %En Example: AT %E1 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: 170 Range: 0 - 253 Unit: Bit-mapped Description: Controls CTS signal, command echo, result codes, command set, dialing mode, and answer/originate mode. Bit Value Function 0 » 0 CTS normal. 1 CTS forced high. 1 0 Command echo disabled. » 1 Command echo enabled. 2 » 0 Result codes enabled. 1 Result codes disabled. 3 0 Display numeric result codes. » 1 Display verbose result codes. 4 » 0 AT command set enabled. 1 AT command set disabled 5 0 Tone dialing enabled. » 1 Pulse dialing enabled. 6 0 Not used 7 0 Answer mode enabled. » 1 Originate mode enabled. BIT-MAPPED REGISTER S21 Format AT [cmds] S21=n [cmds] Example: ATS21=4 Default: 32 Range: 0 - 253 Unit: Bit-mapped Description: Selects jack type, CTS signal, low DTR action, DCD signal, DSR signal, and the Long Space Disconnect function. Bit Value Function 0 » 0 Selects RJ-11, RJ-41S, or RJ45S jack. 1 Selects RJ-12 or RJ-13 jack. 1 0 Not used. 2 0 CTS follows RTS. » 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. Auto-Answer is disabled. 11 Modem is initialized on low DTR. 5 0 DCD forced high. » 1 DCD normal. 6 0 Not used. 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=117 Default: 117 Range: 0-127 Unit: Bit-mapped Description: Controls speaker volume and controls, and limits results codes. Bit Value Function 1, 0 00 Off volume. » 01 On volume. 10 Medium level volume. 11 High level volume. 3, 2 00 Speaker off. » 01 Speaker off on carrier. 10 Speaker always on. 11 Speaker on during handshake. 6, 5, 4 000 Basic result codes only enabled. 100 Basic and connection speed result codes enabled. 101 Basic and connection speed result codes 110 and dialtone detection enabled. » 111 All result codes except dialtone detection enabled. All result codes enabled. 7 » 0 39/61ms at 10pps (North America) 1 33/67ms at 10pps (Europe) BIT-MAPPED REGISTER S23 Format AT [cmds] S23=n [cmds] Example: ATS23=177 Default: 5 Range: 0-255 Unit: Bit-mapped Description: Grants/denies remote digital loopback, controls DTE rate and parity, and sets guard tone. Bit Value Function 0 0 Remote digital loopback denied. » 1 Remote digital loopback allowed. 3, 2, 1 000 Sets serial port speed to 0-300bps. 001 Sets serial port speed to 600bps. » 010 Sets serial port speed to 1200bps. 011 Sets serial port speed to 2400bps. 100 Sets serial port speed to 4800bps. 101 Sets serial port speed to 9600bps. 110 Sets serial port speed to 19200bps. 5,4 » 00 Even parity. 01 Space parity. 10 Odd parity. 11 Mark or no parity. 7, 6 » 00 Guard tone disabled. 01 Guard tone disabled. 10 Guard tone 1800Hz enabled. BIT-MAPPED REGISTER S27 Format AT [cmds] S27=n [cmds] Example: ATS27=192 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 ITU-T mode enabled. 1 Bell mode disabled. BREAK SEND Type: Configuration Format: AT [cmds] \Bn [cmds] Example: AT \B3 &W Range: 1-9 Unit: .1 second Description: Sends break to modem. 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. CHANGE FUNCTION Type: Configuration Format: AT [cmds] %Z Example: AT %Z DP(303)443-3388 Description: Changes the function of SW1 to execute the commands given as a parameter. If no commands are given, it restores default setting of self-test. CONNECT MODE Type: Configuration Format: AT [cmds] \Nn [cmds] Example: AT \N1 DT555-1212 Description: Sets connect mode. Command Function \N0 Normal mode. » \N1 Direct mode. \N2 Reliable mode. \N3 Auto-reliable mode. CONNECTION SPEED UPPER LIMIT Type: Configuration Format: AT [cmds] %Bn [cmds] Example: AT %L3 %B14 \J0 Description: Sets fastest allowed connection speed. Command Function %B300 Select 300bps maximum speed. %B600 Select 600bps maximum speed. %B1200 Select 1200bps maximum speed. » %B2400 Select 2400bps maximum speed. CONVERT TO RELIABLE MODE Type: Immediate Format: AT [cmds] \Y [cmds] Example: AT \Y Description: Initiates reliable mode link. CTS SIGNAL Type: Configuration Format: AT [cmds] \Dn [cmds] Example: AT \D0 Description: Controls action of Clear To Send signal. Command Function » \D0 CTS forced high. \D1 CTS normal. DIAL Type: Immediate Format: AT [cmds] D[phone# & modifiers] [;cmds] Example: AT H1 DF 9W *70, 1(303) 555-1212 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 DF Fast pulse dial, sends 20 pulses per second. DX Dial second stored telephone number D\n Auto redial n times DM Set AT\N3, AT\V1, AT\Q1, AT\J0 until modem returns to on-hook. DISPLAY STORED PHONE NUMBERS Type: Immediate Format: AT [cmds] \F [cmds] Example: AT &Z2=9W1-303-555-1212 \F Description: Displays all stored phone numbers. ECHO DATA Type: Configuration Format: AT [cmds] \En [cmds] Example: AT \E0 Description: Displays data sent from DTR to modem Command Function » \E0 Disabled \E1 Enabled EXTENDED RESULT CODES Type: Configuration Format: AT [cmds] \Vn [cmds] Example: AT \V1 %C1 Description: Selects MNP result codes. Command Function » \V0 MNP result codes disabled. \V1 MNP result codes 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. HELP SCREENS Type: Immediate Format: AT [cmds] ?n [cmds] Example: AT ?1 Description: Displays help menus. Command Function » ?1 Displays standard AT command set ?2 Displays proprietary & command set ?3 Displays dial modifier commands ?4 Displays S register contents. ?5 Displays proprietary \ command set INACTIVITY TIMER Type: Register Format: AT [cmds] S24=n [cmds] Example: ATS24=20 Default: 0 Range: 0-90 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] \Tn [cmds] Example: AT\T20 Default: 0 Range: 0-255 Unit: 1 second Description: Sets the length of time that the modem does not receive information before it disconnects. INTERFACE PROTOCOL Type: Configuration Format: AT [cmds] \In [cmds] Example: AT \I0 Description: Controls data exchange between applications and modem. Command Function » \I0 Disabled. \I1 Enabled. 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. 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. 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. MNP STREAM/BLOCK MODE Type: Configuration Format: AT [cmds] \Ln [cmds] Example: AT \L1 DT555-1212 Description: Selects the transfer mode for MNP. Command Function » \L0 Stream mode for MNP enabled. \L1 Block mode after four second delayfor MNP enabled. \L2 Block mode for MNP enabled. ON-LINE IN RELIABLE MODE Type: Immediate Format: AT [cmds] \On Example: AT \O Description: Returns to on-line and requests reliable mode connection. REPORT CONFIGURATION PROFILES Type: Immediate Format: AT [cmds] \Sn [cmds] Example: AT \S0 Description: Reports active configuration profiles. REPORT CONFIGURATION SWITCH SETTINGS Type: Immediate Format: AT [cmds] %S [cmds] Example: AT %S Description: Displays SW5 settings REPORT NORMAL/TEST STATUS Type: Immediate Format: AT [cmds] %F [cmds] Example: AT %F Description: Displays current setting of SW1 (Normal/Test) REPORT PRODUCT VERSION Type: Immediate Format: AT [cmds] %V [cmds] Example: AT I3 &V1 %V Description: Reports product version. RETURN TO RELIABLE MODE Type: Immediate Format: AT [cmds] \Z [cmds] Example: AT \Z Description: Ends reliable mode link, initiate return to normal 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. STORE SECOND PHONE NUMBER IN NVRAM Type: Configuration Format: AT [cmds] \Pn [dialstring] Example: AT\P Description: Stores a second phone number in the modem’s memory. REDIAL DELAY Type: Register Format: AT [cmds] S19=n [cmds] Example: AT S19=60 Default: 45 Range: 0-255 Unit: 1 second Description: Configures how long the modem will wait to redial a number after a dial attempt has failed. TEST MODES Format AT [cmds] S16=n [cmds] Example: ATS16=40 Default: 0 Range: 0-125 Unit: Bit-mapped Description: Controls loopback tests, analog, digital, remote digital, and self tests. Bit Value Function 0 0 Local analog loopback not in progress. 1 Local analog loopback in progress. 1 0 Not used. 2 0 Local digital loopback not in progress. 1 Local digital loopback in progress. 3 0 Remote digital loopback not in progress. 1 Remote digital loopback in progress. 4 0 Remote digital loopback not requested. 1 Remote digital loopback requested. 5 0 Remote digital loopback with self-test not in progress. 1 Remote digital loopback with self-test in progress. 6 0 Local analog loopback with self-test not in progress. 1 Local analog loopback with self-test in progress. XON/XOFF PASS-THROUGH Type: Configuration Format: AT [cmds] \Xn [cmds] Example: AT \X0 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.