MEGAHERTZ CORPORATION CC4144/CC4144-MIT/CC4144-NEC/CC4144-NOK/XJ2144 Modem Type Data (synchronous/asynchronous)/Fax Maximum Data Rate 14.4Kbps 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 Fax Modulation Protocol ITU-T V.17, V.21CH2, V.27ter, V.29 Error Correction/Compression MNP10, MNP5, V.42, V.42bis V1300 Proprietary AT Command Set 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. %E2 Fallback/fall forward enabled. %E3 Auto-retrain enabled, fast hang-up when line quality is poor. BIT-MAPPED REGISTER S14 Format AT [cmds] S14=n [cmds] Example: ATS14=138 Default: 138 Range: 0-174 Unit: Bit-mapped Description: Controls echo, result codes, result code display, 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 Not used. 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: ATS21=4 Default: 4 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 DSR forced high. 1 DSR normal. 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=118 Default: 118 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. BIT-MAPPED REGISTER S23 Format AT [cmds] S23=n [cmds] Example: ATS23=55 Default: 55 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 Parity even. 01 Not used. 10 Parity odd. » 11 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=73 Default: 73 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 off-line command mode and 101 synchronous connect mode. » 110 Error-correcting mode. Asynchronous mode, serial port speed locked. 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 S28 Format AT [cmds] S28=n [cmds] Example: ATS28=0 Default: 0 Range: 0 Unit: Bit-mapped Description: Controls V.23 split speed, V.23 split screen, V.23 half duplex, and pulse dialing. Bit Value Function 0 » 0 V.23 split speed operation disabled. 1 V.23 split speed operation enabled. 1 » 0 Select 75bps transmit, 1200bps receive. 1 Select 1200bps transmit, 75bps receive. 2 0 Not used. 4, 3 » 00 39ms make/61ms break at 10pps. 01 33ms make/67ms break at 10pps. 10 39ms make/61ms break at 20pps. 11 33ms make/67ms break at 20pps. 5 0 Not used 7, 6 » 00 MNP at highest speed 01 MNP at 1200bps 10 MNP at 1200bps BIT-MAPPED REGISTER S31 Format AT [cmds] S31=n [cmds] Example: ATS31=40 Default: 194 Range: 0-255 Unit: Bit-mapped Description: Controls auto-baud function and result codes. Bit Value Function 0 0 Not used. 1 0 Auto-baud disabled. » 1 Auto-baud enabled. 3, 2 » 00 DTE speed displayed in result codes. 01 Extended result codes enabled; DCE speed displayed in result codes. 10 DCE speed displayed in result codes. BIT-MAPPED REGISTER S40 Format AT [cmds] S40=n [cmds] Example: ATS40=104 Default: 104 Range: 0 - 255 Unit: Bit-mapped Description: Controls power level and break handling; selects MNP extended services, link negotiation, and block size. Bit Value Function 0 0 MNP10 disabled. » 1 MNP10 enabled. 1 0 Link will be negotiated at highest possible speed. 1 Link will be negotiated at 1200bps. 2 » 0 Power level adjustment enabled. 1 Power level adjustment disabled. 5, 4, 3 000 \K0 001 \K1 010 \K2 011 \K3 100 \K4 » 101 \K5 7, 6 00 MNP block size is 64 characters. » 01 MNP block size is 128 characters. 10 MNP block size is 192 characters. 11 MNP block size is 256 characters. BIT-MAPPED REGISTER S41 Format AT [cmds] S41=n [cmds] Example: ATS41=131 Default: 131 Range: 0 - 255 Unit: Bit-mapped Description: Selects compression, auto-retrain, flow control, and MNP mode. Bit Value Function 1 - 0 00 Data compression disabled. 01 MNP5 enabled. 10 V.42bis enabled. » 11 MNP5 and V.42bis enabled. 6, 2 » 00 Auto-retrain disabled. 01 Auto-retrain enabled. 10 Fallback/fall forward enabled. 3 » 0 Flow control disabled. 1 Flow control enabled. 4 » 0 Stream mode for MNP. 1 Block mode for MNP. 5 0 Not used. 7 0 Fallback to V.22bis/V.22 disabled. » 1 Fallback to V.22bis/V.22 enabled. BREAK SEND Type: Configuration Format: AT [cmds] \Bn [cmds] Example: AT \B3 &W Range: 1-9 Unit: 100 ms 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 Modem receives Break received \B from remote modem \K0 Online command Break sent to Buffers mode enabled, remote modem and cleared, break send no break to buffered sent to DTE. remote modem. cleared. \K1 Break sent to Break sent to Buffers remote modem and remote modem and cleared, break buffered buffered sent to DTE. cleared. cleared. \K2 Online command Send break to Break sent mode enabled, remote modem immediately to send no break to immediately. DTE. remote modem. \K3 Send break to Send break to Break sent remote modem remote modem immediately to immediately. immediately. DTE. \K4 Online command Send break with Break sent with mode enabled, transmitted received data send no break to data. to the DTE. remote modem. \K5 Send break with Send break with Break sent with transmitted transmitted received data data. data. to the DTE. CELLULAR TRANSMISSION LEVEL Type: Configuration Format: AT [cmds] @Mn [cmds] Example: AT @M26 &W Default: 26 Range: 10 - 31 Unit: -1 dBm Description: Sets the signal level for transmission when in leased line mode. COMPRESSION AND ERROR CORRECTION Type: Configuration Format: AT %Cn Example: AT %C3 *Y1 Description: Selects data compression and error correction. Command Function %C0 Data compression disabled. %C1 MNP5 enabled. %C2 V.42bis enabled. » %C3 V.42bis and MNP5 enabled. COMPROMISE EQUALIZER Type: Configuration Format: AT [cmds] :En [cmds] Example: AT :E &W Description: Controls V.32 compromise equalizer. Command Function :E0 Equalizer disabled. » :E1 Equalizer enabled. CONFIGURATION PROFILES Type: Immediate Format: AT [cmds] \Sn [cmds] Example: AT \S0 Description: Displays active configuration profiles. CONNECT MODE Type: Configuration Format: AT [cmds] \Nn [cmds] Example: AT \N1 DT555-1212 Description: Sets connect mode. Command Function \N0 Normal mode enabled. \N2 Reliable mode enabled. » \N3 Auto-reliable mode enabled. \N4 LAPM mode enabled. \N5 MNP mode enabled. FLASH DIAL MODIFIER TIME Format AT [cmds] S29=n [cmds] Example: ATS29=0 Default: 70 Range: 0-70 Unit: 10 ms Description: Time the modem will go on-hook upon receiving the ! dial modifier in dial string. 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 enabled. FLOW CONTROL CHARACTER - XOFF Type: Register Format: AT [cmds] S33=n [cmds] Example: ATS33=20 Default: 19 Range: 0-255 Unit: ASCII Description: Sets the character used to represent XOFF. FLOW CONTROL CHARACTER - XON Type: Register Format: AT [cmds] S32=n [cmds] Example: ATS32=20 Default: 17 Range: 0-255 Unit: ASCII Description: Sets the character used to represent XON. HANDSHAKE OPTIONS Type: Configuration Format: AT [cmds] S48=n [cmds] Example: AT S48=7 Description: Controls the V.42 handshake sequence. Command Function S48=0 V.42 negotiation disabled. » S48=7 V.42 negotiation enabled. S48=128 V.42 disabled; fallback according to S36. HDLC ADDRESS Type: Register Format: AT [cmds] S20=n [cmds] Example: ATS20=6 Default: 0 Range: 0-255 Unit: 1 second Description: Sets the HDLC address/BSC character. LINE SIGNAL LEVEL Type: Configuration Format: AT [cmds] %L [cmds] Example: AT %L Description: Returns value of signal level for transmission at the MDP. LINE SIGNAL QUALITY Type: Configuration Format: AT [cmds] %Q [cmds] Example: AT %Q &W Description: Reports line signal quality. MNP10 LINK NEGOTIATION Type: Configuration Format: AT [cmds] *Hn [cmds] Example: AT *H0 -Q1 Description: Sets the speed at which MNP10 link negotiation will occur. Command Function » *H0 Link will be negotiated at highest possible speed. *H1 Link will be negotiated at 1200bps. *H2 Link will be negotiated at 4800bps. MNP10 PARAMETERS Format AT [cmds] S201=n [cmds] Example: ATS201=58 Default: 58 Range: 10 - 63 Unit: Bit-mapped Description: Controls MNP10 parameters. Bit Value Function 4 - 0 01011 Sets leased line transmit attenuation level to -11dBm. … Sets leased line transmit attenuation level to 11010 -26dBm. … Sets leased line transmit attenuation level to -31dBm. 11111 5 0 Equalizer disabled. 1 Equalizer enabled. 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. MNP10 COMPRESSION Type: Configuration Format: AT [cmds] -Kn [cmds] Example: AT %C1 -K1 -Q0 Description: Selects MNP10 data compression. Command Function » -K0 MNP10 disabled. -K1 MNP10 enabled. -K2 MNP10 enabled on originate mode only. MNP10 FALL-BACK Type: Configuration Format: AT [cmds] -Qn [cmds] Example: AT *H0 -Q1 Description: Allows MNP10 to fall back to speeds slower than 4800bps. Command Function -Q0 MNP10 at 2400 and 1200bps disabled. » -Q1 MNP10 at 2400 and 1200bps enabled. MNP10 POWER LEVEL ADJUST Type: Configuration Format: AT [cmds] )Mn [cmds] Example: AT )M1 %C1 Description: Controls automatic transmit power level adjustment during MNP 10 link negotiation. Command Function » )M0 Power level adjustment disabled. )M1 Power level adjustment enabled. 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. \L2 Block mode for MNP enabled. REMOTE ACCESS ESCAPE CHARACTER Format AT [cmds] S202=n [cmds] Example: ATS202=40 Default: 170 Range: 0 - 255 Unit: Bit-mapped Description: Holds value of ASCII character used as the escape character. SLEEP TIMER Format AT [cmds] S24=n [cmds] Example: ATS24=40 Default: 0 Range: 0 - 255 Unit: 1 seconds Description: Maximum duration of DTE and DCE inactivity allowed prior to initiating low-power sleep mode. 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 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. TEST MODE - PTT Type: Configuration Format: AT [cmds] %TT [cmds] Example: AT %TT &W Description: Send PTT test signals for European line test.