MEGAHERTZ CORPORATION CC3288/XJ2288 Modem Type Data (synchronous/asynchronous)/Fax Maximum Data Rate 28.8Kbps Maximum Fax Rate 14.4Kbps Data Bus PCMCIA type II Fax Class Class I & II Data Modulation Protocol Bell 103A/212A ITU-T V.21, V.22, V.22bis, V.23, V.32, V.32bis, V.34 Fax Modulation Protocol ITU-T V.17, V.21CH2, V.27ter, V.29 Error Correction/Compression MNP5, V.42, V.42bis V1301 Proprietary AT Command Set AUTO FALL FORWARD/FALLBACK Type: Configuration Format: AT [cmds] %Gn [cmds] Example: AT %G &W Description: Selects auto fallback. Command Function %G1 Fallback disabled. » %G0 Fallback enabled. AUTO FALLBACK CHARACTER Type: Register Format: AT [cmds] S43=n [cmds] Example: AT S43=13 Default: 13 Range: 0 - 127 Unit: ASCII Description: Set auto fallback character during MNP negotiation. Notes S43=0, disabled. S43=(1 - 127), enabled. AUTO SLEEP TIMER Format AT [cmds] S46=n [cmds] Example: AT S46= 100 Default: 100 Range: 0 - 255 Unit: 100 ms Description: Maximum duration of DTE and DCE inactivity allowed prior to initiating low-power sleep mode. AUTO-RELIABLE FALLBACK CHARACTER Type: Register Format: AT [cmds] %An [cmds] Example: AT %A20 Default: 13 Range: 0-127 Unit: ASCII Description: Sets the character used as the auto-reliable fallback character. %A0 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. \C2 Data is discarded, modem returns to normal mode on receiving auto-reliable fallback character. AUTOSYNC HDLC ADDRESS Type: Register Format: AT [cmds] S20=n [cmds] Example: AT S20=6 Default: 255 Description: HDLC mode = HDLC address; Bisync sync character. BIT-MAPPED REGISTER S14 Format AT [cmds] S14=n [cmds] Example: AT S14=170 Default: 138 Range: 0 - 190 Unit: Bit-mapped Description: Controls echo, result codes, result code display, dumb mode, dial mode, and answer/originate mode. Bit Value Function 0 0 Not used. 1 0 Command echo disabled. » 1 Command echo enabled. 2 » 0 Result codes enabled. 1 Result codes disabled. 3 0 Display result codes in numeric format. » 1 Display result codes in verbose format. 4 » 0 AT command set disabled. 1 AT command set enabled 5 » 0 Tone dial enabled. 1 Pulse dial 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: AT S21=48 Default: 0 Range: 0 - 124 Unit: Bit-mapped Description: Selects CTS signal, low DTR action, DCD signal, and DSR signal. Bit Value Function 1, 0 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 DSR forced high. 1 DSR normal. BIT-MAPPED REGISTER S22 Format AT [cmds] S22=n [cmds] Example: AT S22=118 Default: 118 Range: 0 - 255 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 &P0 enabled. 1 &P1 enabled. BIT-MAPPED REGISTER S-23 Format AT [cmds] S23=n [cmds] Example: AT S23=15 Default: 15 Range: 0 - 241 Unit: Bit-mapped Description: Controls guard tones. Also indicates detected serial port speed and parity. Also provides storage for remote digital loopback tests. Bit Value Function 0 0 &T5 enabled. » 1 &T4 enabled. 3, 2, 1 0 Not used. 5, 4 » 00 Even parity. 01 Space parity. 10 Odd parity. 11 Mark parity. 7, 6 » 00 Guard tone disabled. 01 550Hz guard tone enabled. 10 1800Hz guard tone enabled. BIT-MAPPED REGISTER S27 Format AT [cmds] S27=n [cmds] Example: AT S27=9 Default: 64 Range: 0 - 127 Unit: Bit-mapped Description: Selects sync/async mode, Line type, internal clock, and ITU-T/Bell modes. Bit Value Function 3, 1, 0 » 000 Asynchronous mode, serial port speed follows connect speed. 001 Asynchronous command mode and synchronous 010 connect mode. 011 Asynchronous command mode and synchronous connect mode, DTR dialing enabled. 100 Asynchronous command mode on low DTR, synchronous connect mode on high DTR. Hayes AutoSync™ mode - serial port locked at 9600bps. 2 » 0 Dial up line. 1 Leased line. 5, 4 » 00 Internal DTE transmit clock source. 01 External DTE transmit clock source. 10 Slave DTE transmit clock source. 6 0 CCITT mode. » 1 Bell mode. BIT-MAPPED REGISTER S40 Format AT [cmds] S40=n [cmds] Example: AT S40=65 Default: 77 Range: 0 - 65 Unit: Bit-mapped Description: Controls active protocols and V.42 detection. Bit Value Function 0 0 Automatic mode-detection disabled » 1 In originate mode, handshake begins at line speed designated by the S37 register. Modem can shift to a slower speed if necessary. In answer mode, handshake attempted with the following protocols in order - V.FC, V.32bis, V.32, V.22bis, V.22 or Bell 212, V.21, and Bell 103 1 0 Not used. 3 - 2 1 Not used. 5 - 4 0 Not used. 6 0 V.42 detection disabled. » 1 V.42 detection enabled. BIT-MAPPED REGISTER S41 Format AT [cmds] S41=n [cmds] Example: AT S41=0 Default: 0 Range: 0 - 2 Unit: Bit-mapped Description: Connect message display. Value Function » S41=0 Connect with DTE speed. S41=1 Connect with carrier, protocol, and compression. S41=2 Connect with DCE speed. BIT-MAPPED REGISTER S44 Format AT [cmds] S44=n [cmds] Example: AT S44=23 Default: 23 Range: 0 - 23 Unit: Bit-mapped Description: Selects V.42 status, V.42bis, and fallback. Bit Value Function 0 0 V.42bis status disabled. » 1 V.42bis status enabled. 2, 1 00 V.42bis disabled. 01 V.42bis when transmitting enabled. 10 V.42bis when receiving enabled. » 11 V.42bis when transmitting/receiving enabled. 3 0 Not used. 4 0 Fallback disabled. » 1 Fallback enabled. 7, 6, 5 0 Not used. BIT-MAPPED REGISTER S48 Type: Register Format: AT [cmds] S48=n [cmds] Example: AT S48=0 Description: Sets auto-reliable buffer. Command Function » S48=0 Data is discarded. S48=1 Data is buffered. S48=2 Data is discarded, modem returns to normal mode on receiving auto-reliable fallback character. BIT-MAPPED REGISTER S49 Type: Register Format: AT [cmds] S49=n [cmds] Example: AT S49=255 Description: Set maximum block size. Command Function S49=32 Maximum MNP block size is 32 characters. S49=63 Maximum MNP block size is 64 characters. S49=127 Maximum MNP block size is 128 characters. S49=191 Maximum MNP block size is 192 characters. » S49=255 Maximum MNP block size is 256 characters. BIT-MAPPED REGISTER S51 Format AT [cmds] S51=n [cmds] Example: AT S51=40 Default: 3 Range: 0 - 115 Unit: Bit-mapped Description: selects flow control, Bit Value Function 2, 1, 0 000 Flow control disabled. 001 XON/XOFF flow control enabled. 010 CTS flow control to DTE enabled. » 011 RTS/CTS flow control enabled. 3 0 Not used. 4 » 0 Flow control disabled. 1 Flow control to XON/XOFF flow enabled. 5 » 0 Serial speed locked. 1 Serial speed follows connect speed. 7, 6 » 0 XON/XOFF signals trapped by local modem. 1 XON/XOFF passed through local modem. BIT-MAPPED REGISTER S54 Format AT [cmds] S54=n [cmds] Example: AT S54=69 Default: 0 Range: 0 - 255 Unit: Bit-mapped Description: Selects the communication protocol for data calls, and protocol result code. Bit Value Function 0 » 0 B2 is enabled. 1 B2 is not enabled. 1 » 0 B3 is enabled 1 B3 is not enabled. 6 - 2 0 Not used. 7 » 0 Protocol result code disabled. 1 Protocol result code enabled. 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. BTLZ STRING LENGTH Type: Register Format: AT [cmds] S58=n [cmds] Example: AT S58=32 Default: 32 Range: 6 - 64 Unit: Bit-mapped Description: Selects BTLZ string length. COMPRESSION Type: Configuration Format: AT %Cn Example: AT &J1 %C1 \Q0 Description: Selects data compression. Command Function %C0 Data compression disabled. » %C1 Data compression enabled. 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 reliable mode enabled. » \N3 LAP-M, MNP, or Normal mode enabled. \N4 LAP-M mode with fallback to MNP enabled. \N5 LAP-M mode enabled. DIGITAL LINE CURRENT SENSING Type: Configuration Format: AT [cmds] ~~Ln [cmds] Example: AT ~~L1 &W Description: Controls the digital line current sensing. Command Function ~~L0 Digital line current sensing disable. ~~L1 Digital line current sensing enable. DIGITAL LINE OVER-CURRENT SENSING Type: Immediate Format: AT [cmds] ~~S=n [cmds] Example: AT ~~S= 4 Default: 4 Range: 0 - 9 Unit: 1 ms Description: Sets the over-current sense time condition. DISPLAY LINE OVER-CURRENT SENSE TIME Type: Configuration Format: AT [cmds] ~~S? [cmds] Example: AT ~~S? &W Description: Displays current over-current sense time in milliseconds. DTE RATE STATUS Type: Register Format: AT [cmds] S62=n [cmds] Example: AT S62=16 Description: Selects DTE rate. Command Function 0 300 bps. 1 600 bps. 2 1200 bps. 3 2400 bps. 4 4800 bps. 5 7200 bps. 6 9600 bps. 7 12Kbps. 8 14.4Kbps. 9 16.8Kbps. 10 19.2Kbps. 11 21.6Kbps. 12 24Kbps. 13 26.4Kbps. 14 28.8Kbps. 15 38.4Kbps. » 16 57.6Kbps. 17 115.2Kbps. FAX/DATA MODE Type: Register Format: AT [cmds] S50=n [cmds] Example: AT S50=0 &W Description: Choose data or FAX mode. Command Function » 0 Data mode enabled. 1 FAX mode enabled. FLOW CONTROL Type: Configuration Format: AT [cmds] \Gn [cmds] Example: AT G1 &K3 Description: Selects modem port flow control. Command Function » \G0 Flow control disabled. \G1 Flow control to XON/XOFF flow enabled. FLOW CONTROL TYPE Type: Configuration Format: AT [cmds] &Kn [cmds] Example: AT &G1 &K3 Description: Sets type of flow control used by modem. Command Function &K0 Flow control disabled. &K1 Not used. &K2 Not used. » &K3 CTS/RTS flow control enabled. &K4 XON/XOFF pass-through flow control enabled. FLOW CONTROL TYPE Type: Configuration Format: AT [cmds] \Qn [cmds] Example: AT \Q0 A Description: Sets type of flow control used by modem. Command Function \Q0 Flow control disabled. \Q1 XON/XOFF flow control enabled. \Q2 CTS flow control to DTE enabled. » \Q3 RTS/CTS flow control enabled. FLOW CONTROL TYPE Type: Configuration Format: AT [cmds] S52=n [cmds] Example: AT &G1 S52=3 Description: Sets type of flow control used by modem. Command Function S52=0 Flow control disabled. S52=1 Not used. S52=2 Not used. » S52=3 CTS/RTS flow control enabled. S52=4 XON/XOFF pass-through flow control enabled. FORCED SLEEP TIMER Format AT [cmds] S47=n [cmds] Example: AT S47=100 Default: 10 Range: 0 - 255 Unit: 100 ms Description: Specifies duration of DTE and DCE inactivity allowed prior to initiating sleep mode; This is used as a forced powerdown mode for PCMCIA. INACTIVITY TIMER Type: Register Format: AT [cmds] \Tn [cmds] Example: AT \T20 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 VALUE Format AT [cmds] S30=n [cmds] Example: AT S30=0 Default: 0 Range: 0 - 90 Unit: Minutes. Description: Inactivity timer value. LOCAL SERIAL PORT SPEED Type: Configuration Format: AT [cmds] S72=n [cmds] Example: AT S72=16 *OS0 *SC1 Description: Sets serial port speed. Command Function » S72=0 Sets speed automatically. S72=1 Sets 300bps speed. S72=2 Sets 600bps speed. S72=3 Sets 1200bps speed. S72=4 Sets 2400bps speed. S72=5 Sets 4800bps speed. S72=6 Sets 7200bps speed. S72=7 Sets 9600bps speed. S72=8 Sets 12Kbps speed. S72=9 Sets 14.4Kbps speed. S72=10 Sets 16.8Kbps speed. S72=11 Sets 19.2Kbps speed. S72=12 Sets 21.6Kbps speed. S72=13 Sets 24Kbps speed. S72=14 Sets 26.4Kbps speed. S72=15 Sets 28.8Kbps speed. S72=16 Sets 38.4Kbps speed. S72=17 Sets 57.6Kbps speed. S72=18 Sets 115.2Kbps 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. 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 Maximum MNP block size is 64 characters. \A1 Maximum MNP block size is 128 characters. \A2 Maximum MNP block size is 192 characters. » \A3 Maximum MNP block size is 256 characters. \A4 Maximum MNP block size is 32 characters. MNP OPTIONS Format AT [cmds] S59=n [cmds] Example: AT S59=0 Default: 1 Range: 0 - 1 Unit: Bit-mapped Description: Selects MNP5 status. Bit Value Function 0 0 Data compression disabled. » 1 Data compression enabled. MODEM OPERATING MODE Type: Configuration Format: AT [cmds] S53=n [cmds] Example: AT S53=3 Description: Sets connect mode. Command Function S53=0 Normal mode enabled. S53=1 Direct mode enabled. S53=2 MNP reliable mode enabled. » S53=3 LAP-M, MNP, or Normal mode enabled. S53=4 LAP-M mode with fallback to MNP enabled. S53=5 LAP-M mode enabled. PROTOCOL/SPEED Type: Register Format: AT [cmds] S37n [cmds] Example: AT S37=0 Description: Selects the current DCE speed. Command Function S37=0 Select last ATspeed. S37=3 Select 300bps speed. S37=5 Select 1200bps speed. S37=6 Select 2400bps speed. S37=7 Select 4800bps speed. S37=8 Select 7200bps speed. S37=9 Select 9600bps speed. S37=10 Select 12Kbps speed. S37=11 Select 14.4Kbps speed. S37=12 Select 16.8Kbps speed. S37=13 Select 19.2Kbps speed. S37=14 Select 21.6Kbps speed. S37=15 Select 24Kbps speed. S37=16 Select 26.4Kbps speed. S37=17 Select 28.8Kbps speed. PROTOCOL RESULT CODE Type: Configuration Format: AT [cmds] \Vn [cmds] Example: AT \V0 Q0 Description: \V responds when conjunction with W0 and W2 commands. Command Function \V1 Protocol result code disabled. » \V0 Protocol result code enabled. ROOT FIRMWARE Type: Configuration Format: AT [cmds] -V [cmds] Example: AT -V &W Description: Displays base firmware version information. ROUND TRIP DELAY Type: Register Format: AT [cmds] S65=n [cmds] Example: AT S65=1 Default: Unidentified Range: Unidentified Unit: 100 ms Description: Sets the round trip delay. TEST MODES Format AT [cmds] S16=n [cmds] Example: ATS16=40 Default: 0 Range: 0-127 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 Modem not in remote digital loopback. 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. V.32 AUTO-RETRAIN Type: Configuration Format: AT [cmds] &Bn [cmds] Example: AT &B1 &W Description: Selects action the modem will take during bad line quality on V.32/32bis connection. Command Function %B0 Auto-retrain disabled, hang up. %B1 Auto-retrain on line quality problem enabled; Hang-up after S7 threshold exceeded. %B2 Modem ignores line quality problems. V.32 RETRAIN Type: Register Format: AT [cmds] S42=n [cmds] Example: AT S42=1 Default: 1 Range: 0 - 2 Unit: Bit-mapped Description: Selects action the modem will take during bad line quality on V.32/32bis connection. Command Function S42=0 Auto-retrain disabled, hang up. » S42=1 Auto-retrain on line quality problem enabled. S42=2 Modem ignores line quality problems. V.42 DETECTION PHASE Type: Configuration Format: AT [cmds] -Jn [cmds] Example: AT -J1 &W Description: Controls V.42 detection. Command Function -J0 V.42 detection disabled. » -J1 V.42 detection enabled. V.42bis COMPRESSION CONTROL Type: Configuration Format: AT [cmds] "Hn [cmds] Example: AT "H3 &W Description: Controls V.42bis data compression Command Function "H0 V.42bis disabled. "H1 V.42bis when transmitting enabled. "H2 V.42bis when receiving enabled. » "H3 V.42bis when transmitting/receiving enabled. V.42bis DICTIONARY SIZE Type: Configuration Format: AT [cmds] "Nn [cmds] Example: AT "N2 &W Description: Controls V.42 dictionary size. Command Function "N0 512 bytes. "N1 1024 bytes. » "N2 1536 bytes. V.42bis DICTIONARY SIZE Type: Register Format: AT [cmds] S57=n [cmds] Example: AT S57=2 Description: Selects V.42bis dictionary size. Command Function S57=0 512 bytes. S57=1 1024 bytes. » S57=2 1536 bytes. V.42bis MAXIMUM STRING LENGTH Type: Immediate Format: AT [cmds] "O=n [cmds] Example: AT "O=32 Default: 32 Range: 6 - 64 Unit: Unidentified Description: Selects string size for V.42bis compression. 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.